X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fust-consumer.c;fp=src%2Fbin%2Flttng-sessiond%2Fust-consumer.c;h=0000000000000000000000000000000000000000;hp=a68c5d96dc99070304357d3a723b136191868ecc;hb=7966af5763c4aaca39df9bbfa9277ff15715c720;hpb=3a5f70173aa04d11ccb22694d5d31a702cad33ab

diff --git a/src/bin/lttng-sessiond/ust-consumer.c b/src/bin/lttng-sessiond/ust-consumer.c
deleted file mode 100644
index a68c5d96d..000000000
--- a/src/bin/lttng-sessiond/ust-consumer.c
+++ /dev/null
@@ -1,513 +0,0 @@
-/*
- * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#define _LGPL_SOURCE
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <inttypes.h>
-
-#include <common/compat/errno.h>
-#include <common/common.h>
-#include <common/consumer/consumer.h>
-#include <common/defaults.h>
-
-#include "consumer.h"
-#include "health-sessiond.h"
-#include "ust-consumer.h"
-#include "lttng-ust-error.h"
-#include "buffer-registry.h"
-#include "session.h"
-#include "lttng-sessiond.h"
-
-/*
- * Send a single channel to the consumer using command ASK_CHANNEL_CREATION.
- *
- * Consumer socket lock 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,
-		struct ust_registry_session *registry,
-		struct lttng_trace_chunk *trace_chunk)
-{
-	int ret, output;
-	uint32_t chan_id;
-	uint64_t key, chan_reg_key;
-	char *pathname = NULL;
-	struct lttcomm_consumer_msg msg;
-	struct ust_registry_channel *ust_reg_chan;
-	char shm_path[PATH_MAX] = "";
-	char root_shm_path[PATH_MAX] = "";
-	bool is_local_trace;
-	size_t consumer_path_offset = 0;
-
-	LTTNG_ASSERT(ua_sess);
-	LTTNG_ASSERT(ua_chan);
-	LTTNG_ASSERT(socket);
-	LTTNG_ASSERT(consumer);
-	LTTNG_ASSERT(registry);
-
-	DBG2("Asking UST consumer for channel");
-
-	is_local_trace = consumer->net_seq_index == -1ULL;
-	/* Format the channel's path (relative to the current trace chunk). */
-	pathname = setup_channel_trace_path(consumer, ua_sess->path,
-			&consumer_path_offset);
-	if (!pathname) {
-		ret = -1;
-		goto error;
-	}
-
-	if (is_local_trace && 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(
-				trace_chunk, pathname_index);
-		free(pathname_index);
-		if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
-			ret = -1;
-			goto error;
-		}
-	}
-
-	/* Depending on the buffer type, a different channel key is used. */
-	if (ua_sess->buffer_type == LTTNG_BUFFER_PER_UID) {
-		chan_reg_key = ua_chan->tracing_channel_id;
-	} else {
-		chan_reg_key = ua_chan->key;
-	}
-
-	if (ua_chan->attr.type == LTTNG_UST_ABI_CHAN_METADATA) {
-		chan_id = -1U;
-		/*
-		 * Metadata channels shm_path (buffers) are handled within
-		 * session daemon. Consumer daemon should not try to create
-		 * those buffer files.
-		 */
-	} else {
-		ust_reg_chan = ust_registry_channel_find(registry, chan_reg_key);
-		LTTNG_ASSERT(ust_reg_chan);
-		chan_id = ust_reg_chan->chan_id;
-		if (ua_sess->shm_path[0]) {
-			strncpy(shm_path, ua_sess->shm_path, sizeof(shm_path));
-			shm_path[sizeof(shm_path) - 1] = '\0';
-			strncat(shm_path, "/",
-				sizeof(shm_path) - strlen(shm_path) - 1);
-			strncat(shm_path, ua_chan->name,
-					sizeof(shm_path) - strlen(shm_path) - 1);
-				strncat(shm_path, "_",
-					sizeof(shm_path) - strlen(shm_path) - 1);
-		}
-		strncpy(root_shm_path, ua_sess->root_shm_path, sizeof(root_shm_path));
-		root_shm_path[sizeof(root_shm_path) - 1] = '\0';
-	}
-
-	switch (ua_chan->attr.output) {
-	case LTTNG_UST_ABI_MMAP:
-	default:
-		output = LTTNG_EVENT_MMAP;
-		break;
-	}
-
-	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,
-			ua_sess->live_timer_interval,
-			ua_sess->live_timer_interval != 0,
-			ua_chan->monitor_timer_interval,
-			output,
-			(int) ua_chan->attr.type,
-			ua_sess->tracing_id,
-			&pathname[consumer_path_offset],
-			ua_chan->name,
-			consumer->net_seq_index,
-			ua_chan->key,
-			registry->uuid,
-			chan_id,
-			ua_chan->tracefile_size,
-			ua_chan->tracefile_count,
-			ua_sess->id,
-			ua_sess->output_traces,
-			lttng_credentials_get_uid(&ua_sess->real_credentials),
-			ua_chan->attr.blocking_timeout,
-			root_shm_path, shm_path,
-			trace_chunk,
-			&ua_sess->effective_credentials);
-
-	health_code_update();
-
-	ret = consumer_socket_send(socket, &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. */
-	LTTNG_ASSERT(key == ua_chan->key);
-	/* We need at least one where 1 stream for 1 cpu. */
-	if (ua_sess->output_traces) {
-		LTTNG_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.
- *
- * Session list and rcu read side locks must be held by the caller.
- *
- * 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,
-		struct ust_registry_session *registry,
-		struct lttng_trace_chunk * trace_chunk)
-{
-	int ret;
-
-	LTTNG_ASSERT(ua_sess);
-	LTTNG_ASSERT(ua_chan);
-	LTTNG_ASSERT(consumer);
-	LTTNG_ASSERT(socket);
-	LTTNG_ASSERT(registry);
-
-	if (!consumer->enabled) {
-		ret = -LTTNG_ERR_NO_CONSUMER;
-		DBG3("Consumer is disabled");
-		goto error;
-	}
-
-	pthread_mutex_lock(socket->lock);
-	ret = ask_channel_creation(ua_sess, ua_chan, consumer, socket, registry,
-			trace_chunk);
-	pthread_mutex_unlock(socket->lock);
-	if (ret < 0) {
-		ERR("ask_channel_creation consumer command failed");
-		goto error;
-	}
-
-error:
-	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;
-
-	LTTNG_ASSERT(ua_chan);
-	LTTNG_ASSERT(socket);
-
-	memset(&msg, 0, sizeof(msg));
-	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 = lttng_ust_ctl_recv_channel_from_consumer(*socket->fd_ptr, &ua_chan->obj);
-	if (ret < 0) {
-		if (ret != -EPIPE) {
-			ERR("Error recv channel from consumer %d with ret %d",
-					*socket->fd_ptr, 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 = lttng_ust_ctl_recv_stream_from_consumer(*socket->fd_ptr, &stream->obj);
-		if (ret < 0) {
-			free(stream);
-			if (ret == -LTTNG_UST_ERR_NOENT) {
-				DBG3("UST app consumer has no more stream available");
-				break;
-			}
-			if (ret != -EPIPE) {
-				ERR("Recv stream from consumer %d with ret %d",
-						*socket->fd_ptr, 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 successfully", ua_chan->streams.count);
-	}
-
-	/* This MUST match or else we have a synchronization problem. */
-	LTTNG_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;
-
-	LTTNG_ASSERT(ua_chan);
-	LTTNG_ASSERT(socket);
-
-	memset(&msg, 0, sizeof(msg));
-	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;
-
-	LTTNG_ASSERT(app);
-	LTTNG_ASSERT(stream);
-	LTTNG_ASSERT(channel);
-
-	DBG2("UST consumer send stream to app %d", app->sock);
-
-	/* Relay stream to application. */
-	pthread_mutex_lock(&app->sock_lock);
-	ret = lttng_ust_ctl_send_stream_to_ust(app->sock, channel->obj, stream->obj);
-	pthread_mutex_unlock(&app->sock_lock);
-	if (ret < 0) {
-		if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
-			DBG3("UST app send stream to ust failed. Application is dead. (pid: %d, sock: %d).",
-					app->pid, app->sock);
-		} else if (ret == -EAGAIN) {
-			WARN("UST app send stream to ust failed. Communication time out (pid: %d, sock: %d).",
-					app->pid, app->sock);
-		} else {
-			ERR("UST app send stream, handle %d, to ust failed with ret %d (pid: %d, sock: %d).",
-					stream->obj->handle, ret, app->pid,
-					app->sock);
-		}
-		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;
-
-	LTTNG_ASSERT(app);
-	LTTNG_ASSERT(ua_sess);
-	LTTNG_ASSERT(channel);
-	LTTNG_ASSERT(channel->obj);
-
-	DBG2("UST app send channel to sock %d pid %d (name: %s, key: %" PRIu64 ")",
-			app->sock, app->pid, channel->name, channel->tracing_channel_id);
-
-	/* Send stream to application. */
-	pthread_mutex_lock(&app->sock_lock);
-	ret = lttng_ust_ctl_send_channel_to_ust(app->sock, ua_sess->handle, channel->obj);
-	pthread_mutex_unlock(&app->sock_lock);
-	if (ret < 0) {
-		if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
-			DBG3("UST app send channel to ust failed. Application is dead (pid: %d, sock: %d).",
-					app->pid, app->sock);
-		} else if (ret == -EAGAIN) {
-			WARN("UST app send channel to ust failed. Communication timeout (pid: %d, sock: %d).",
-					app->pid, app->sock);
-		} else {
-			ERR("UST app send channel %s, to ust failed with ret %d (pid: %d, sock: %d).",
-					channel->name, ret, app->pid,
-					app->sock);
-		}
-		goto error;
-	}
-
-error:
-	return ret;
-}
-
-/*
- * Handle the metadata requests from the UST consumer
- *
- * Return 0 on success else a negative value.
- */
-int ust_consumer_metadata_request(struct consumer_socket *socket)
-{
-	int ret;
-	ssize_t ret_push;
-	struct lttcomm_metadata_request_msg request;
-	struct buffer_reg_uid *reg_uid;
-	struct ust_registry_session *ust_reg;
-	struct lttcomm_consumer_msg msg;
-
-	LTTNG_ASSERT(socket);
-
-	rcu_read_lock();
-	health_code_update();
-
-	/* Wait for a metadata request */
-	pthread_mutex_lock(socket->lock);
-	ret = consumer_socket_recv(socket, &request, sizeof(request));
-	pthread_mutex_unlock(socket->lock);
-	if (ret < 0) {
-		goto end;
-	}
-
-	DBG("Metadata request received for session %" PRIu64 ", key %" PRIu64,
-			request.session_id, request.key);
-
-	reg_uid = buffer_reg_uid_find(request.session_id,
-			request.bits_per_long, request.uid);
-	if (reg_uid) {
-		ust_reg = reg_uid->registry->reg.ust;
-	} else {
-		struct buffer_reg_pid *reg_pid =
-			buffer_reg_pid_find(request.session_id_per_pid);
-		if (!reg_pid) {
-			DBG("PID registry not found for session id %" PRIu64,
-					request.session_id_per_pid);
-
-			memset(&msg, 0, sizeof(msg));
-			msg.cmd_type = LTTNG_ERR_UND;
-			pthread_mutex_lock(socket->lock);
-			(void) consumer_send_msg(socket, &msg);
-			pthread_mutex_unlock(socket->lock);
-			/*
-			 * This is possible since the session might have been destroyed
-			 * during a consumer metadata request. So here, return gracefully
-			 * because the destroy session will push the remaining metadata to
-			 * the consumer.
-			 */
-			ret = 0;
-			goto end;
-		}
-		ust_reg = reg_pid->registry->reg.ust;
-	}
-	LTTNG_ASSERT(ust_reg);
-
-	pthread_mutex_lock(&ust_reg->lock);
-	ret_push = ust_app_push_metadata(ust_reg, socket, 1);
-	pthread_mutex_unlock(&ust_reg->lock);
-	if (ret_push == -EPIPE) {
-		DBG("Application or relay closed while pushing metadata");
-	} else if (ret_push < 0) {
-		ERR("Pushing metadata");
-		ret = -1;
-		goto end;
-	} else {
-		DBG("UST Consumer metadata pushed successfully");
-	}
-	ret = 0;
-
-end:
-	rcu_read_unlock();
-	return ret;
-}