X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fconsumer.c;h=d91c3e60bf0e16156232ca3a2f251d0d6ae779e6;hp=92abcf21d07257ce4cfa83ad44dbf79bd833508d;hb=6dc3064a30b0cc7cfa9fdd22da1963525dfb7388;hpb=d88aee689d5bd0067f362a323cb69c37717df59f

diff --git a/src/bin/lttng-sessiond/consumer.c b/src/bin/lttng-sessiond/consumer.c
index 92abcf21d..d91c3e60b 100644
--- a/src/bin/lttng-sessiond/consumer.c
+++ b/src/bin/lttng-sessiond/consumer.c
@@ -30,6 +30,9 @@
 #include <common/uri.h>
 
 #include "consumer.h"
+#include "health.h"
+#include "ust-app.h"
+#include "utils.h"
 
 /*
  * Receive a reply command status message from the consumer. Consumer socket
@@ -167,7 +170,7 @@ void consumer_output_send_destroy_relayd(struct consumer_output *consumer)
 	assert(consumer);
 
 	/* Destroy any relayd connection */
-	if (consumer && consumer->type == CONSUMER_DST_NET) {
+	if (consumer->type == CONSUMER_DST_NET) {
 		rcu_read_lock();
 		cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket,
 				node.node) {
@@ -223,6 +226,8 @@ int consumer_create_socket(struct consumer_data *data,
 		rcu_read_unlock();
 	}
 
+	socket->type = data->type;
+
 	DBG3("Consumer socket created (fd: %d) and added to output",
 			data->cmd_sock);
 
@@ -230,6 +235,41 @@ error:
 	return ret;
 }
 
+/*
+ * Return the consumer socket from the given consumer output with the right
+ * bitness. On error, returns NULL.
+ *
+ * The caller MUST acquire a rcu read side lock and keep it until the socket
+ * object reference is not needed anymore.
+ */
+struct consumer_socket *consumer_find_socket_by_bitness(int bits,
+		struct consumer_output *consumer)
+{
+	int consumer_fd;
+	struct consumer_socket *socket = NULL;
+
+	switch (bits) {
+	case 64:
+		consumer_fd = uatomic_read(&ust_consumerd64_fd);
+		break;
+	case 32:
+		consumer_fd = uatomic_read(&ust_consumerd32_fd);
+		break;
+	default:
+		assert(0);
+		goto end;
+	}
+
+	socket = consumer_find_socket(consumer_fd, consumer);
+	if (!socket) {
+		ERR("Consumer socket fd %d not found in consumer obj %p",
+				consumer_fd, consumer);
+	}
+
+end:
+	return socket;
+}
+
 /*
  * Find a consumer_socket in a consumer_output hashtable. Read side lock must
  * be acquired before calling this function and across use of the
@@ -370,6 +410,8 @@ error:
 
 /*
  * Delete the consumer_output object from the list and free the ptr.
+ *
+ * Should *NOT* be called with RCU read-side lock held.
  */
 void consumer_destroy_output(struct consumer_output *obj)
 {
@@ -389,7 +431,7 @@ void consumer_destroy_output(struct consumer_output *obj)
 		rcu_read_unlock();
 
 		/* Finally destroy HT */
-		lttng_ht_destroy(obj->socks);
+		ht_cleanup_push(obj->socks);
 	}
 
 	free(obj);
@@ -397,12 +439,13 @@ void consumer_destroy_output(struct consumer_output *obj)
 
 /*
  * Copy consumer output and returned the newly allocated copy.
+ *
+ * Should *NOT* be called with RCU read-side lock held.
  */
 struct consumer_output *consumer_copy_output(struct consumer_output *obj)
 {
+	int ret;
 	struct lttng_ht *tmp_ht_ptr;
-	struct lttng_ht_iter iter;
-	struct consumer_socket *socket, *copy_sock;
 	struct consumer_output *output;
 
 	assert(obj);
@@ -419,27 +462,63 @@ struct consumer_output *consumer_copy_output(struct consumer_output *obj)
 	/* Putting back the HT pointer and start copying socket(s). */
 	output->socks = tmp_ht_ptr;
 
+	ret = consumer_copy_sockets(output, obj);
+	if (ret < 0) {
+		goto malloc_error;
+	}
+
+error:
+	return output;
+
+malloc_error:
+	consumer_destroy_output(output);
+	return NULL;
+}
+
+/*
+ * Copy consumer sockets from src to dst.
+ *
+ * Return 0 on success or else a negative value.
+ */
+int consumer_copy_sockets(struct consumer_output *dst,
+		struct consumer_output *src)
+{
+	int ret = 0;
+	struct lttng_ht_iter iter;
+	struct consumer_socket *socket, *copy_sock;
+
+	assert(dst);
+	assert(src);
+
 	rcu_read_lock();
-	cds_lfht_for_each_entry(obj->socks->ht, &iter.iter, socket, node.node) {
+	cds_lfht_for_each_entry(src->socks->ht, &iter.iter, socket, node.node) {
+		/* Ignore socket that are already there. */
+		copy_sock = consumer_find_socket(socket->fd, dst);
+		if (copy_sock) {
+			continue;
+		}
+
 		/* Create new socket object. */
 		copy_sock = consumer_allocate_socket(socket->fd);
 		if (copy_sock == NULL) {
 			rcu_read_unlock();
-			goto malloc_error;
+			ret = -ENOMEM;
+			goto error;
 		}
 
 		copy_sock->registered = socket->registered;
+		/*
+		 * This is valid because this lock is shared accross all consumer
+		 * object being the global lock of the consumer data structure of the
+		 * session daemon.
+		 */
 		copy_sock->lock = socket->lock;
-		consumer_add_socket(copy_sock, output);
+		consumer_add_socket(copy_sock, dst);
 	}
 	rcu_read_unlock();
 
 error:
-	return output;
-
-malloc_error:
-	consumer_destroy_output(output);
-	return NULL;
+	return ret;
 }
 
 /*
@@ -467,6 +546,12 @@ int consumer_set_network_uri(struct consumer_output *obj,
 		if (uri->port == 0) {
 			/* Assign default port. */
 			uri->port = DEFAULT_NETWORK_CONTROL_PORT;
+		} else {
+			if (obj->dst.net.data_isset && uri->port ==
+					obj->dst.net.data.port) {
+				ret = -LTTNG_ERR_INVALID;
+				goto error;
+			}
 		}
 		DBG3("Consumer control URI set with port %d", uri->port);
 		break;
@@ -476,11 +561,18 @@ int consumer_set_network_uri(struct consumer_output *obj,
 		if (uri->port == 0) {
 			/* Assign default port. */
 			uri->port = DEFAULT_NETWORK_DATA_PORT;
+		} else {
+			if (obj->dst.net.control_isset && uri->port ==
+					obj->dst.net.control.port) {
+				ret = -LTTNG_ERR_INVALID;
+				goto error;
+			}
 		}
 		DBG3("Consumer data URI set with port %d", uri->port);
 		break;
 	default:
 		ERR("Set network uri type unknown %d", uri->stype);
+		ret = -LTTNG_ERR_INVALID;
 		goto error;
 	}
 
@@ -516,6 +608,7 @@ int consumer_set_network_uri(struct consumer_output *obj,
 		}
 		if (ret < 0) {
 			PERROR("snprintf set consumer uri subdir");
+			ret = -LTTNG_ERR_NOMEM;
 			goto error;
 		}
 
@@ -527,7 +620,7 @@ int consumer_set_network_uri(struct consumer_output *obj,
 equal:
 	return 1;
 error:
-	return -1;
+	return ret;
 }
 
 /*
@@ -625,7 +718,10 @@ void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg,
 		gid_t gid,
 		uint64_t relayd_id,
 		uint64_t key,
-		unsigned char *uuid)
+		unsigned char *uuid,
+		uint32_t chan_id,
+		uint64_t tracefile_size,
+		uint64_t tracefile_count)
 {
 	assert(msg);
 
@@ -645,6 +741,9 @@ void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg,
 	msg->u.ask_channel.gid = gid;
 	msg->u.ask_channel.relayd_id = relayd_id;
 	msg->u.ask_channel.key = key;
+	msg->u.ask_channel.chan_id = chan_id;
+	msg->u.ask_channel.tracefile_size = tracefile_size;
+	msg->u.ask_channel.tracefile_count = tracefile_count;
 
 	memcpy(msg->u.ask_channel.uuid, uuid, sizeof(msg->u.ask_channel.uuid));
 
@@ -670,7 +769,9 @@ void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg,
 		const char *name,
 		unsigned int nb_init_streams,
 		enum lttng_event_output output,
-		int type)
+		int type,
+		uint64_t tracefile_size,
+		uint64_t tracefile_count)
 {
 	assert(msg);
 
@@ -687,6 +788,8 @@ void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg,
 	msg->u.channel.nb_init_streams = nb_init_streams;
 	msg->u.channel.output = output;
 	msg->u.channel.type = type;
+	msg->u.channel.tracefile_size = tracefile_size;
+	msg->u.channel.tracefile_count = tracefile_count;
 
 	strncpy(msg->u.channel.pathname, pathname,
 			sizeof(msg->u.channel.pathname));
@@ -758,14 +861,14 @@ error:
  * On success return positive value. On error, negative value.
  */
 int consumer_send_relayd_socket(struct consumer_socket *consumer_sock,
-		struct lttcomm_sock *sock, struct consumer_output *consumer,
+		struct lttcomm_relayd_sock *rsock, struct consumer_output *consumer,
 		enum lttng_stream_type type, uint64_t session_id)
 {
 	int ret;
 	struct lttcomm_consumer_msg msg;
 
 	/* Code flow error. Safety net. */
-	assert(sock);
+	assert(rsock);
 	assert(consumer);
 	assert(consumer_sock);
 
@@ -784,13 +887,13 @@ int consumer_send_relayd_socket(struct consumer_socket *consumer_sock,
 	msg.u.relayd_sock.net_index = consumer->net_seq_index;
 	msg.u.relayd_sock.type = type;
 	msg.u.relayd_sock.session_id = session_id;
-	memcpy(&msg.u.relayd_sock.sock, sock, sizeof(msg.u.relayd_sock.sock));
+	memcpy(&msg.u.relayd_sock.sock, rsock, sizeof(msg.u.relayd_sock.sock));
 
 	DBG3("Sending relayd sock info to consumer on %d", consumer_sock->fd);
 	ret = lttcomm_send_unix_sock(consumer_sock->fd, &msg, sizeof(msg));
 	if (ret < 0) {
 		/* The above call will print a PERROR on error. */
-		DBG("Error when sending relayd sockets on sock %d", sock->fd);
+		DBG("Error when sending relayd sockets on sock %d", rsock->sock.fd);
 		goto error;
 	}
 
@@ -800,7 +903,7 @@ int consumer_send_relayd_socket(struct consumer_socket *consumer_sock,
 	}
 
 	DBG3("Sending relayd socket file descriptor to consumer");
-	ret = consumer_send_fds(consumer_sock, &sock->fd, 1);
+	ret = consumer_send_fds(consumer_sock, &rsock->sock.fd, 1);
 	if (ret < 0) {
 		goto error;
 	}
@@ -933,3 +1036,214 @@ error_unlock:
 	rcu_read_unlock();
 	return -1;
 }
+
+/*
+ * Send a flush command to consumer using the given channel key.
+ *
+ * Return 0 on success else a negative value.
+ */
+int consumer_flush_channel(struct consumer_socket *socket, uint64_t key)
+{
+	int ret;
+	struct lttcomm_consumer_msg msg;
+
+	assert(socket);
+	assert(socket->fd >= 0);
+
+	DBG2("Consumer flush channel key %" PRIu64, key);
+
+	msg.cmd_type = LTTNG_CONSUMER_FLUSH_CHANNEL;
+	msg.u.flush_channel.key = key;
+
+	pthread_mutex_lock(socket->lock);
+	health_code_update();
+
+	ret = consumer_send_msg(socket, &msg);
+	if (ret < 0) {
+		goto end;
+	}
+
+end:
+	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 consumer_close_metadata(struct consumer_socket *socket,
+		uint64_t metadata_key)
+{
+	int ret;
+	struct lttcomm_consumer_msg msg;
+
+	assert(socket);
+	assert(socket->fd >= 0);
+
+	DBG2("Consumer close metadata channel key %" PRIu64, metadata_key);
+
+	msg.cmd_type = LTTNG_CONSUMER_CLOSE_METADATA;
+	msg.u.close_metadata.key = metadata_key;
+
+	pthread_mutex_lock(socket->lock);
+	health_code_update();
+
+	ret = consumer_send_msg(socket, &msg);
+	if (ret < 0) {
+		goto end;
+	}
+
+end:
+	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 consumer_setup_metadata(struct consumer_socket *socket,
+		uint64_t metadata_key)
+{
+	int ret;
+	struct lttcomm_consumer_msg msg;
+
+	assert(socket);
+	assert(socket->fd >= 0);
+
+	DBG2("Consumer setup metadata channel key %" PRIu64, metadata_key);
+
+	msg.cmd_type = LTTNG_CONSUMER_SETUP_METADATA;
+	msg.u.setup_metadata.key = metadata_key;
+
+	pthread_mutex_lock(socket->lock);
+	health_code_update();
+
+	ret = consumer_send_msg(socket, &msg);
+	if (ret < 0) {
+		goto end;
+	}
+
+end:
+	health_code_update();
+	pthread_mutex_unlock(socket->lock);
+	return ret;
+}
+
+/*
+ * Send metadata string to consumer. Socket lock MUST be acquired.
+ *
+ * Return 0 on success else a negative value.
+ */
+int consumer_push_metadata(struct consumer_socket *socket,
+		uint64_t metadata_key, char *metadata_str, size_t len,
+		size_t target_offset)
+{
+	int ret;
+	struct lttcomm_consumer_msg msg;
+
+	assert(socket);
+	assert(socket->fd >= 0);
+
+	DBG2("Consumer push metadata to consumer socket %d", socket->fd);
+
+	msg.cmd_type = LTTNG_CONSUMER_PUSH_METADATA;
+	msg.u.push_metadata.key = metadata_key;
+	msg.u.push_metadata.target_offset = target_offset;
+	msg.u.push_metadata.len = len;
+
+	health_code_update();
+	ret = consumer_send_msg(socket, &msg);
+	if (ret < 0 || len == 0) {
+		goto end;
+	}
+
+	DBG3("Consumer pushing metadata on sock %d of len %zu", socket->fd, len);
+
+	ret = lttcomm_send_unix_sock(socket->fd, metadata_str, len);
+	if (ret < 0) {
+		goto end;
+	}
+
+	health_code_update();
+	ret = consumer_recv_status_reply(socket);
+	if (ret < 0) {
+		goto end;
+	}
+
+end:
+	health_code_update();
+	return ret;
+}
+
+/*
+ * Ask the consumer to snapshot a specific channel using the key.
+ *
+ * Return 0 on success or else a negative error.
+ */
+int consumer_snapshot_channel(struct consumer_socket *socket, uint64_t key,
+		struct snapshot_output *output, int metadata, uid_t uid, gid_t gid,
+		int wait)
+{
+	int ret;
+	struct lttcomm_consumer_msg msg;
+
+	assert(socket);
+	assert(socket->fd >= 0);
+	assert(output);
+	assert(output->consumer);
+
+	DBG("Consumer snapshot channel key %" PRIu64, key);
+
+	memset(&msg, 0, sizeof(msg));
+
+	msg.cmd_type = LTTNG_CONSUMER_SNAPSHOT_CHANNEL;
+	msg.u.snapshot_channel.key = key;
+	msg.u.snapshot_channel.max_size = output->max_size;
+	msg.u.snapshot_channel.metadata = metadata;
+
+	if (output->consumer->type == CONSUMER_DST_NET) {
+		msg.u.snapshot_channel.relayd_id = output->consumer->net_seq_index;
+		msg.u.snapshot_channel.use_relayd = 1;
+		ret = snprintf(msg.u.snapshot_channel.pathname,
+				sizeof(msg.u.snapshot_channel.pathname), "%s/%s",
+				output->consumer->subdir, DEFAULT_SNAPSHOT_NAME);
+		if (ret < 0) {
+			ret = -LTTNG_ERR_NOMEM;
+			goto error;
+		}
+	} else {
+		ret = snprintf(msg.u.snapshot_channel.pathname,
+				sizeof(msg.u.snapshot_channel.pathname), "%s/%s",
+				output->consumer->dst.trace_path, DEFAULT_SNAPSHOT_NAME);
+		if (ret < 0) {
+			ret = -LTTNG_ERR_NOMEM;
+			goto error;
+		}
+
+		/* Create directory. Ignore if exist. */
+		ret = run_as_mkdir_recursive(msg.u.snapshot_channel.pathname,
+				S_IRWXU | S_IRWXG, uid, gid);
+		if (ret < 0) {
+			if (ret != -EEXIST) {
+				ERR("Trace directory creation error");
+				goto error;
+			}
+		}
+	}
+
+	health_code_update();
+	ret = consumer_send_msg(socket, &msg);
+	if (ret < 0) {
+		goto error;
+	}
+
+error:
+	health_code_update();
+	return ret;
+}