[lttng-tools.git] / src / bin / lttng-sessiond / consumer.h

/*
 * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License, version 2 only, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef _CONSUMER_H
#define _CONSUMER_H

#include <common/consumer.h>
#include <common/hashtable/hashtable.h>
#include <lttng/lttng.h>

enum consumer_dst_type {
	CONSUMER_DST_LOCAL,
	CONSUMER_DST_NET,
};

struct consumer_socket {
	/* File descriptor */
	int fd;
	/*
	 * To use this socket (send/recv), this lock MUST be acquired.
	 */
	pthread_mutex_t *lock;

	/*
	 * Indicates if the socket was registered by a third part
	 * (REGISTER_CONSUMER) or is the spawn consumer of the session daemon.
	 * During the destroy phase of a consumer output, we close the socket if
	 * this flag is set to 1 since we don't need the fd anymore.
	 */
	unsigned int registered;

	/* Flag if network sockets were sent to the consumer. */
	unsigned int control_sock_sent;
	unsigned int data_sock_sent;

	struct lttng_ht_node_ulong node;
};

struct consumer_data {
	enum lttng_consumer_type type;

	pthread_t thread;	/* Worker thread interacting with the consumer */

	/* Conditions used by the consumer thread to indicate readiness. */
	pthread_cond_t cond;
	pthread_condattr_t condattr;
	pthread_mutex_t cond_mutex;

	/*
	 * This is a flag condition indicating that the consumer thread is ready
	 * and connected to the lttng-consumerd daemon. This flag MUST only be
	 * updated by locking the condition mutex above or before spawning a
	 * consumer thread.
	 *
	 * A value of 0 means that the thread is NOT ready. A value of 1 means that
	 * the thread consumer did connect successfully to the lttng-consumerd
	 * daemon. A negative value indicates that there is been an error and the
	 * thread has likely quit.
	 */
	int consumer_thread_is_ready;

	/* Mutex to control consumerd pid assignation */
	pthread_mutex_t pid_mutex;
	pid_t pid;

	int err_sock;
	/* These two sockets uses the cmd_unix_sock_path. */
	int cmd_sock;
	struct consumer_socket metadata_sock;

	/* consumer error and command Unix socket path */
	char err_unix_sock_path[PATH_MAX];
	char cmd_unix_sock_path[PATH_MAX];

	/* communication lock */
	pthread_mutex_t lock;
};

/*
 * Network URIs
 */
struct consumer_net {
	/*
	 * Indicate if URI type is set. Those flags should only be set when the
	 * created URI is done AND valid.
	 */
	int control_isset;
	int data_isset;

	/*
	 * The following two URIs MUST have the same destination address for
	 * network streaming to work. Network hop are not yet supported.
	 */

	/* Control path for network streaming. */
	struct lttng_uri control;

	/* Data path for network streaming. */
	struct lttng_uri data;
};

/*
 * Consumer output object describing where and how to send data.
 */
struct consumer_output {
	/* If the consumer is enabled meaning that should be used */
	unsigned int enabled;
	enum consumer_dst_type type;

	/*
	 * The net_seq_index is the index of the network stream on the consumer
	 * side. It tells the consumer which streams goes to which relayd with this
	 * index. The relayd sockets are index with it on the consumer side.
	 */
	uint64_t net_seq_index;

	/*
	 * Subdirectory path name used for both local and network consumer.
	 */
	char subdir[PATH_MAX];

	/*
	 * Hashtable of consumer_socket index by the file descriptor value. For
	 * multiarch consumer support, we can have more than one consumer (ex: 32
	 * and 64 bit).
	 */
	struct lttng_ht *socks;

	union {
		char trace_path[PATH_MAX];
		struct consumer_net net;
	} dst;
};

struct consumer_socket *consumer_find_socket(int key,
		struct consumer_output *consumer);
struct consumer_socket *consumer_find_socket_by_bitness(int bits,
		struct consumer_output *consumer);
struct consumer_socket *consumer_allocate_socket(int fd);
void consumer_add_socket(struct consumer_socket *sock,
		struct consumer_output *consumer);
void consumer_del_socket(struct consumer_socket *sock,
		struct consumer_output *consumer);
void consumer_destroy_socket(struct consumer_socket *sock);

struct consumer_output *consumer_create_output(enum consumer_dst_type type);
struct consumer_output *consumer_copy_output(struct consumer_output *obj);
void consumer_destroy_output(struct consumer_output *obj);
int consumer_set_network_uri(struct consumer_output *obj,
		struct lttng_uri *uri);
int consumer_send_fds(struct consumer_socket *sock, int *fds, size_t nb_fd);
int consumer_send_msg(struct consumer_socket *sock,
		struct lttcomm_consumer_msg *msg);
int consumer_send_stream(struct consumer_socket *sock,
		struct consumer_output *dst, struct lttcomm_consumer_msg *msg,
		int *fds, size_t nb_fd);
int consumer_send_channel(struct consumer_socket *sock,
		struct lttcomm_consumer_msg *msg);
int consumer_send_relayd_socket(struct consumer_socket *consumer_sock,
		struct lttcomm_relayd_sock *rsock, struct consumer_output *consumer,
		enum lttng_stream_type type, uint64_t session_id);
int consumer_send_destroy_relayd(struct consumer_socket *sock,
		struct consumer_output *consumer);
int consumer_recv_status_reply(struct consumer_socket *sock);
int consumer_recv_status_channel(struct consumer_socket *sock,
		uint64_t *key, unsigned int *stream_count);
void consumer_output_send_destroy_relayd(struct consumer_output *consumer);
int consumer_create_socket(struct consumer_data *data,
		struct consumer_output *output);
int consumer_set_subdir(struct consumer_output *consumer,
		const char *session_name);

void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg,
		uint64_t subbuf_size,
		uint64_t num_subbuf,
		int overwrite,
		unsigned int switch_timer_interval,
		unsigned int read_timer_interval,
		int output,
		int type,
		uint64_t session_id,
		const char *pathname,
		const char *name,
		uid_t uid,
		gid_t gid,
		uint64_t relayd_id,
		uint64_t key,
		unsigned char *uuid,
		uint32_t chan_id,
		uint64_t tracefile_size,
		uint64_t tracefile_count);
void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg *msg,
		enum lttng_consumer_command cmd,
		uint64_t channel_key,
		uint64_t stream_key,
		int cpu);
void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg,
		enum lttng_consumer_command cmd,
		uint64_t channel_key,
		uint64_t session_id,
		const char *pathname,
		uid_t uid,
		gid_t gid,
		uint64_t relayd_id,
		const char *name,
		unsigned int nb_init_streams,
		enum lttng_event_output output,
		int type,
		uint64_t tracefile_size,
		uint64_t tracefile_count);
int consumer_is_data_pending(uint64_t session_id,
		struct consumer_output *consumer);
int consumer_close_metadata(struct consumer_socket *socket,
		uint64_t metadata_key);
int consumer_setup_metadata(struct consumer_socket *socket,
		uint64_t metadata_key);
int consumer_push_metadata(struct consumer_socket *socket,
		uint64_t metadata_key, char *metadata_str, size_t len,
		size_t target_offset);
int consumer_flush_channel(struct consumer_socket *socket, uint64_t key);

#endif /* _CONSUMER_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License, version 2 only, as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program; if not, write to the Free Software Foundation, Inc., 51
	15	* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	16	*/
	17
	18	#ifndef _CONSUMER_H
	19	#define _CONSUMER_H
	20
	21	#include <common/consumer.h>
	22	#include <common/hashtable/hashtable.h>
	23	#include <lttng/lttng.h>
	24
	25	enum consumer_dst_type {
	26	CONSUMER_DST_LOCAL,
	27	CONSUMER_DST_NET,
	28	};
	29
	30	struct consumer_socket {
	31	/* File descriptor */
	32	int fd;
	33	/*
	34	* To use this socket (send/recv), this lock MUST be acquired.
	35	*/
	36	pthread_mutex_t *lock;
	37
	38	/*
	39	* Indicates if the socket was registered by a third part
	40	* (REGISTER_CONSUMER) or is the spawn consumer of the session daemon.
	41	* During the destroy phase of a consumer output, we close the socket if
	42	* this flag is set to 1 since we don't need the fd anymore.
	43	*/
	44	unsigned int registered;
	45
	46	/* Flag if network sockets were sent to the consumer. */
	47	unsigned int control_sock_sent;
	48	unsigned int data_sock_sent;
	49
	50	struct lttng_ht_node_ulong node;
	51	};
	52
	53	struct consumer_data {
	54	enum lttng_consumer_type type;
	55
	56	pthread_t thread; /* Worker thread interacting with the consumer */
	57
	58	/* Conditions used by the consumer thread to indicate readiness. */
	59	pthread_cond_t cond;
	60	pthread_condattr_t condattr;
	61	pthread_mutex_t cond_mutex;
	62
	63	/*
	64	* This is a flag condition indicating that the consumer thread is ready
	65	* and connected to the lttng-consumerd daemon. This flag MUST only be
	66	* updated by locking the condition mutex above or before spawning a
	67	* consumer thread.
	68	*
	69	* A value of 0 means that the thread is NOT ready. A value of 1 means that
	70	* the thread consumer did connect successfully to the lttng-consumerd
	71	* daemon. A negative value indicates that there is been an error and the
	72	* thread has likely quit.
	73	*/
	74	int consumer_thread_is_ready;
	75
	76	/* Mutex to control consumerd pid assignation */
	77	pthread_mutex_t pid_mutex;
	78	pid_t pid;
	79
	80	int err_sock;
	81	/* These two sockets uses the cmd_unix_sock_path. */
	82	int cmd_sock;
	83	struct consumer_socket metadata_sock;
	84
	85	/* consumer error and command Unix socket path */
	86	char err_unix_sock_path[PATH_MAX];
	87	char cmd_unix_sock_path[PATH_MAX];
	88
	89	/* communication lock */
	90	pthread_mutex_t lock;
	91	};
	92
	93	/*
	94	* Network URIs
	95	*/
	96	struct consumer_net {
	97	/*
	98	* Indicate if URI type is set. Those flags should only be set when the
	99	* created URI is done AND valid.
	100	*/
	101	int control_isset;
	102	int data_isset;
	103
	104	/*
	105	* The following two URIs MUST have the same destination address for
	106	* network streaming to work. Network hop are not yet supported.
	107	*/
	108
	109	/* Control path for network streaming. */
	110	struct lttng_uri control;
	111
	112	/* Data path for network streaming. */
	113	struct lttng_uri data;
	114	};
	115
	116	/*
	117	* Consumer output object describing where and how to send data.
	118	*/
	119	struct consumer_output {
	120	/* If the consumer is enabled meaning that should be used */
	121	unsigned int enabled;
	122	enum consumer_dst_type type;
	123
	124	/*
	125	* The net_seq_index is the index of the network stream on the consumer
	126	* side. It tells the consumer which streams goes to which relayd with this
	127	* index. The relayd sockets are index with it on the consumer side.
	128	*/
	129	uint64_t net_seq_index;
	130
	131	/*
	132	* Subdirectory path name used for both local and network consumer.
	133	*/
	134	char subdir[PATH_MAX];
	135
	136	/*
	137	* Hashtable of consumer_socket index by the file descriptor value. For
	138	* multiarch consumer support, we can have more than one consumer (ex: 32
	139	* and 64 bit).
	140	*/
	141	struct lttng_ht *socks;
	142
	143	union {
	144	char trace_path[PATH_MAX];
	145	struct consumer_net net;
	146	} dst;
	147	};
	148
	149	struct consumer_socket *consumer_find_socket(int key,
	150	struct consumer_output *consumer);
	151	struct consumer_socket *consumer_find_socket_by_bitness(int bits,
	152	struct consumer_output *consumer);
	153	struct consumer_socket *consumer_allocate_socket(int fd);
	154	void consumer_add_socket(struct consumer_socket *sock,
	155	struct consumer_output *consumer);
	156	void consumer_del_socket(struct consumer_socket *sock,
	157	struct consumer_output *consumer);
	158	void consumer_destroy_socket(struct consumer_socket *sock);
	159
	160	struct consumer_output *consumer_create_output(enum consumer_dst_type type);
	161	struct consumer_output consumer_copy_output(struct consumer_output obj);
	162	void consumer_destroy_output(struct consumer_output *obj);
	163	int consumer_set_network_uri(struct consumer_output *obj,
	164	struct lttng_uri *uri);
	165	int consumer_send_fds(struct consumer_socket sock, int fds, size_t nb_fd);
	166	int consumer_send_msg(struct consumer_socket *sock,
	167	struct lttcomm_consumer_msg *msg);
	168	int consumer_send_stream(struct consumer_socket *sock,
	169	struct consumer_output dst, struct lttcomm_consumer_msg msg,
	170	int *fds, size_t nb_fd);
	171	int consumer_send_channel(struct consumer_socket *sock,
	172	struct lttcomm_consumer_msg *msg);
	173	int consumer_send_relayd_socket(struct consumer_socket *consumer_sock,
	174	struct lttcomm_relayd_sock rsock, struct consumer_output consumer,
	175	enum lttng_stream_type type, uint64_t session_id);
	176	int consumer_send_destroy_relayd(struct consumer_socket *sock,
	177	struct consumer_output *consumer);
	178	int consumer_recv_status_reply(struct consumer_socket *sock);
	179	int consumer_recv_status_channel(struct consumer_socket *sock,
	180	uint64_t key, unsigned int stream_count);
	181	void consumer_output_send_destroy_relayd(struct consumer_output *consumer);
	182	int consumer_create_socket(struct consumer_data *data,
	183	struct consumer_output *output);
	184	int consumer_set_subdir(struct consumer_output *consumer,
	185	const char *session_name);
	186
	187	void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg,
	188	uint64_t subbuf_size,
	189	uint64_t num_subbuf,
	190	int overwrite,
	191	unsigned int switch_timer_interval,
	192	unsigned int read_timer_interval,
	193	int output,
	194	int type,
	195	uint64_t session_id,
	196	const char *pathname,
	197	const char *name,
	198	uid_t uid,
	199	gid_t gid,
	200	uint64_t relayd_id,
	201	uint64_t key,
	202	unsigned char *uuid,
	203	uint32_t chan_id,
	204	uint64_t tracefile_size,
	205	uint64_t tracefile_count);
	206	void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg *msg,
	207	enum lttng_consumer_command cmd,
	208	uint64_t channel_key,
	209	uint64_t stream_key,
	210	int cpu);
	211	void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg,
	212	enum lttng_consumer_command cmd,
	213	uint64_t channel_key,
	214	uint64_t session_id,
	215	const char *pathname,
	216	uid_t uid,
	217	gid_t gid,
	218	uint64_t relayd_id,
	219	const char *name,
	220	unsigned int nb_init_streams,
	221	enum lttng_event_output output,
	222	int type,
	223	uint64_t tracefile_size,
	224	uint64_t tracefile_count);
	225	int consumer_is_data_pending(uint64_t session_id,
	226	struct consumer_output *consumer);
	227	int consumer_close_metadata(struct consumer_socket *socket,
	228	uint64_t metadata_key);
	229	int consumer_setup_metadata(struct consumer_socket *socket,
	230	uint64_t metadata_key);
	231	int consumer_push_metadata(struct consumer_socket *socket,
	232	uint64_t metadata_key, char *metadata_str, size_t len,
	233	size_t target_offset);
	234	int consumer_flush_channel(struct consumer_socket *socket, uint64_t key);
	235
	236	#endif /* _CONSUMER_H */