X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fkernel-consumer.c;h=bf3559a21fa021a55e5cebeb7a582b72e80b87de;hp=f589c2a0b7cac77ae256feabd3c562abeed3c3a1;hb=bd722d76b035766511f0b329f9bbaa2f4180c4ed;hpb=f1e1679499bf3e76127c8812c72a6e9ba69e02e5

diff --git a/src/bin/lttng-sessiond/kernel-consumer.c b/src/bin/lttng-sessiond/kernel-consumer.c
index f589c2a0b..bf3559a21 100644
--- a/src/bin/lttng-sessiond/kernel-consumer.c
+++ b/src/bin/lttng-sessiond/kernel-consumer.c
@@ -24,32 +24,270 @@
 
 #include <common/common.h>
 #include <common/defaults.h>
-#include <common/sessiond-comm/sessiond-comm.h>
 
+#include "consumer.h"
+#include "health.h"
 #include "kernel-consumer.h"
 
+static char *create_channel_path(struct consumer_output *consumer,
+		uid_t uid, gid_t gid)
+{
+	int ret;
+	char tmp_path[PATH_MAX];
+	char *pathname = NULL;
+
+	assert(consumer);
+
+	/* Get the right path name destination */
+	if (consumer->type == CONSUMER_DST_LOCAL) {
+		/* Set application path to the destination path */
+		ret = snprintf(tmp_path, sizeof(tmp_path), "%s%s",
+				consumer->dst.trace_path, consumer->subdir);
+		if (ret < 0) {
+			PERROR("snprintf kernel channel path");
+			goto error;
+		}
+		pathname = strndup(tmp_path, sizeof(tmp_path));
+
+		/* Create directory */
+		ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, uid, gid);
+		if (ret < 0) {
+			if (ret != -EEXIST) {
+				ERR("Trace directory creation error");
+				goto error;
+			}
+		}
+		DBG3("Kernel local consumer tracefile path: %s", pathname);
+	} else {
+		ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir);
+		if (ret < 0) {
+			PERROR("snprintf kernel metadata path");
+			goto error;
+		}
+		pathname = strndup(tmp_path, sizeof(tmp_path));
+		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.
+ */
+int kernel_consumer_add_channel(struct consumer_socket *sock,
+		struct ltt_kernel_channel *channel, struct ltt_kernel_session *session,
+		unsigned int monitor)
+{
+	int ret;
+	char *pathname;
+	struct lttcomm_consumer_msg lkm;
+	struct consumer_output *consumer;
+
+	/* Safety net */
+	assert(channel);
+	assert(session);
+	assert(session->consumer);
+
+	consumer = session->consumer;
+
+	DBG("Kernel consumer adding channel %s to kernel consumer",
+			channel->channel->name);
+
+	if (monitor) {
+		pathname = create_channel_path(consumer, session->uid, session->gid);
+		if (!pathname) {
+			ret = -1;
+			goto error;
+		}
+	} else {
+		/* Empty path. */
+		pathname = "";
+	}
+
+	/* Prep channel message structure */
+	consumer_init_channel_comm_msg(&lkm,
+			LTTNG_CONSUMER_ADD_CHANNEL,
+			channel->fd,
+			session->id,
+			pathname,
+			session->uid,
+			session->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);
+
+	health_code_update();
+
+	ret = consumer_send_channel(sock, &lkm);
+	if (ret < 0) {
+		goto error;
+	}
+
+	health_code_update();
+
+error:
+	return ret;
+}
+
+/*
+ * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM.
+ */
+int kernel_consumer_add_metadata(struct consumer_socket *sock,
+		struct ltt_kernel_session *session, unsigned int monitor)
+{
+	int ret;
+	char *pathname;
+	struct lttcomm_consumer_msg lkm;
+	struct consumer_output *consumer;
+
+	/* Safety net */
+	assert(session);
+	assert(session->consumer);
+	assert(sock);
+
+	DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd);
+
+	/* Get consumer output pointer */
+	consumer = session->consumer;
+
+	if (monitor) {
+		pathname = create_channel_path(consumer, session->uid, session->gid);
+		if (!pathname) {
+			ret = -1;
+			goto error;
+		}
+	} else {
+		/* Empty path. */
+		pathname = "";
+	}
+
+	/* Prep channel message structure */
+	consumer_init_channel_comm_msg(&lkm,
+			LTTNG_CONSUMER_ADD_CHANNEL,
+			session->metadata->fd,
+			session->id,
+			pathname,
+			session->uid,
+			session->gid,
+			consumer->net_seq_index,
+			DEFAULT_METADATA_NAME,
+			1,
+			DEFAULT_KERNEL_CHANNEL_OUTPUT,
+			CONSUMER_CHANNEL_TYPE_METADATA,
+			0, 0,
+			monitor);
+
+	health_code_update();
+
+	ret = consumer_send_channel(sock, &lkm);
+	if (ret < 0) {
+		goto error;
+	}
+
+	health_code_update();
+
+	/* Prep stream message structure */
+	consumer_init_stream_comm_msg(&lkm,
+			LTTNG_CONSUMER_ADD_STREAM,
+			session->metadata->fd,
+			session->metadata_stream_fd,
+			0); /* CPU: 0 for metadata. */
+
+	health_code_update();
+
+	/* Send stream and file descriptor */
+	ret = consumer_send_stream(sock, consumer, &lkm,
+			&session->metadata_stream_fd, 1);
+	if (ret < 0) {
+		goto error;
+	}
+
+	health_code_update();
+
+error:
+	return ret;
+}
+
+/*
+ * Sending a single stream to the consumer with command ADD_STREAM.
+ */
+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;
+
+	assert(channel);
+	assert(stream);
+	assert(session);
+	assert(session->consumer);
+	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_stream_comm_msg(&lkm,
+			LTTNG_CONSUMER_ADD_STREAM,
+			channel->fd,
+			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;
+}
+
 /*
  * Send all stream fds of kernel channel to the consumer.
  */
-int kernel_consumer_send_channel_stream(struct consumer_data *consumer_data,
-		int sock, struct ltt_kernel_channel *channel, uid_t uid, gid_t gid)
+int kernel_consumer_send_channel_stream(struct consumer_socket *sock,
+		struct ltt_kernel_channel *channel, struct ltt_kernel_session *session,
+		unsigned int monitor)
 {
-	int ret, count = 0;
+	int ret;
 	struct ltt_kernel_stream *stream;
-	struct lttcomm_consumer_msg lkm;
+
+	/* Safety net */
+	assert(channel);
+	assert(session);
+	assert(session->consumer);
+	assert(sock);
+
+	/* Bail out if consumer is disabled */
+	if (!session->consumer->enabled) {
+		ret = LTTNG_OK;
+		goto error;
+	}
 
 	DBG("Sending streams of channel %s to kernel consumer",
 			channel->channel->name);
 
-	/* Send channel */
-	lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL;
-	lkm.u.channel.channel_key = channel->fd;
-	lkm.u.channel.max_sb_size = channel->channel->attr.subbuf_size;
-	lkm.u.channel.mmap_len = 0;	/* for kernel */
-	DBG("Sending channel %d to consumer", lkm.u.channel.channel_key);
-	ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm));
+	ret = kernel_consumer_add_channel(sock, channel, session, monitor);
 	if (ret < 0) {
-		PERROR("send consumer channel");
 		goto error;
 	}
 
@@ -58,37 +296,15 @@ int kernel_consumer_send_channel_stream(struct consumer_data *consumer_data,
 		if (!stream->fd) {
 			continue;
 		}
-		/* Reset consumer message structure */
-		memset(&lkm, 0, sizeof(lkm));
-		lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM;
-		lkm.u.stream.channel_key = channel->fd;
-		lkm.u.stream.stream_key = stream->fd;
-		lkm.u.stream.state = stream->state;
-		lkm.u.stream.output = channel->channel->attr.output;
-		lkm.u.stream.mmap_len = 0;	/* for kernel */
-		lkm.u.stream.uid = uid;
-		lkm.u.stream.gid = gid;
-		strncpy(lkm.u.stream.path_name, stream->pathname, PATH_MAX - 1);
-		lkm.u.stream.path_name[PATH_MAX - 1] = '\0';
-		count++;
-
-		DBG("Sending stream %d to consumer", lkm.u.stream.stream_key);
-		ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm));
-		if (ret < 0) {
-			PERROR("send consumer stream");
-			goto error;
-		}
-		ret = lttcomm_send_fds_unix_sock(sock, &stream->fd, 1);
+
+		/* Add stream on the kernel consumer side. */
+		ret = kernel_consumer_add_stream(sock, channel, stream, session,
+				monitor);
 		if (ret < 0) {
-			PERROR("send consumer stream ancillary data");
 			goto error;
 		}
 	}
 
-	DBG("consumer channel streams sent");
-
-	return 0;
-
 error:
 	return ret;
 }
@@ -96,69 +312,50 @@ error:
 /*
  * Send all stream fds of the kernel session to the consumer.
  */
-int kernel_consumer_send_session(struct consumer_data *consumer_data,
+int kernel_consumer_send_session(struct consumer_socket *sock,
 		struct ltt_kernel_session *session)
 {
-	int ret;
+	int ret, monitor = 0;
 	struct ltt_kernel_channel *chan;
-	struct lttcomm_consumer_msg lkm;
-	int sock = session->consumer_fd;
 
-	DBG("Sending metadata stream fd");
+	/* Safety net */
+	assert(session);
+	assert(session->consumer);
+	assert(sock);
+
+	/* Bail out if consumer is disabled */
+	if (!session->consumer->enabled) {
+		ret = LTTNG_OK;
+		goto error;
+	}
 
-	/* Extra protection. It's NOT supposed to be set to -1 at this point */
-	if (session->consumer_fd < 0) {
-		session->consumer_fd = consumer_data->cmd_sock;
+	/* 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) {
-		/* Send metadata channel fd */
-		lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL;
-		lkm.u.channel.channel_key = session->metadata->fd;
-		lkm.u.channel.max_sb_size = session->metadata->conf->attr.subbuf_size;
-		lkm.u.channel.mmap_len = 0;	/* for kernel */
-		DBG("Sending metadata channel %d to consumer", lkm.u.channel.channel_key);
-		ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm));
+		ret = kernel_consumer_add_metadata(sock, session, monitor);
 		if (ret < 0) {
-			PERROR("send consumer channel");
 			goto error;
 		}
 
-		/* Send metadata stream fd */
-		lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM;
-		lkm.u.stream.channel_key = session->metadata->fd;
-		lkm.u.stream.stream_key = session->metadata_stream_fd;
-		lkm.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM;
-		lkm.u.stream.output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
-		lkm.u.stream.mmap_len = 0;	/* for kernel */
-		lkm.u.stream.uid = session->uid;
-		lkm.u.stream.gid = session->gid;
-		strncpy(lkm.u.stream.path_name, session->metadata->pathname,
-				PATH_MAX - 1);
-		lkm.u.stream.path_name[PATH_MAX - 1] = '\0';
-
-		DBG("Sending metadata stream %d to consumer", lkm.u.stream.stream_key);
-		ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm));
-		if (ret < 0) {
-			PERROR("send consumer stream");
-			goto error;
-		}
-		ret = lttcomm_send_fds_unix_sock(sock, &session->metadata_stream_fd, 1);
-		if (ret < 0) {
-			PERROR("send consumer stream");
-			goto error;
-		}
+		/* Flag that at least the metadata has been sent to the consumer. */
+		session->consumer_fds_sent = 1;
 	}
 
+	/* Send channel and streams of it */
 	cds_list_for_each_entry(chan, &session->channel_list.head, list) {
-		ret = kernel_consumer_send_channel_stream(consumer_data, sock, chan,
-				session->uid, session->gid);
+		ret = kernel_consumer_send_channel_stream(sock, chan, session,
+				monitor);
 		if (ret < 0) {
 			goto error;
 		}
 	}
 
-	DBG("consumer fds (metadata and channel streams) sent");
+	DBG("Kernel consumer FDs of metadata and channel streams sent");
 
 	return 0;
 
@@ -166,3 +363,60 @@ error:
 	return ret;
 }
 
+int kernel_consumer_destroy_channel(struct consumer_socket *socket,
+		struct ltt_kernel_channel *channel)
+{
+	int ret;
+	struct lttcomm_consumer_msg msg;
+
+	assert(channel);
+	assert(socket);
+	assert(socket->fd >= 0);
+
+	DBG("Sending kernel consumer destroy channel key %d", channel->fd);
+
+	msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
+	msg.u.destroy_channel.key = channel->fd;
+
+	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;
+
+	assert(metadata);
+	assert(socket);
+	assert(socket->fd >= 0);
+
+	DBG("Sending kernel consumer destroy channel key %d", metadata->fd);
+
+	msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
+	msg.u.destroy_channel.key = metadata->fd;
+
+	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;
+}