/*
* Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
- * Copyright (C) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * 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,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#ifndef _LTTNG_CONSUMER_H
-#define _LTTNG_CONSUMER_H
+#ifndef LIB_CONSUMER_H
+#define LIB_CONSUMER_H
#include <limits.h>
#include <poll.h>
#include <common/hashtable/hashtable.h>
#include <common/compat/fcntl.h>
+#include <common/sessiond-comm/sessiond-comm.h>
/*
* When the receiving thread dies, we need to have a way to make the polling
LTTNG_CONSUMER_UPDATE_STREAM,
/* inform the consumer to quit when all fd has hang up */
LTTNG_CONSUMER_STOP,
+ LTTNG_CONSUMER_ADD_RELAYD_SOCKET,
+ /* Inform the consumer to kill a specific relayd connection */
+ LTTNG_CONSUMER_DESTROY_RELAYD,
};
/* State of each fd in consumer */
*/
struct lttng_consumer_stream {
struct lttng_ht_node_ulong node;
+ struct lttng_ht_node_ulong waitfd_node;
struct lttng_consumer_channel *chan; /* associated channel */
/*
* key is the key used by the session daemon to refer to the
/* UID/GID of the user owning the session to which stream belongs */
uid_t uid;
gid_t gid;
+ /* Network sequence number. Indicating on which relayd socket it goes. */
+ int net_seq_idx;
+ /* Identify if the stream is the metadata */
+ unsigned int metadata_flag;
+ /* Used when the stream is set for network streaming */
+ uint64_t relayd_stream_id;
+ /* Next sequence number to use for trace packet */
+ uint64_t next_net_seq_num;
+};
+
+/*
+ * Internal representation of a relayd socket pair.
+ */
+struct consumer_relayd_sock_pair {
+ /* Network sequence number. */
+ int net_seq_idx;
+ /* Number of stream associated with this relayd */
+ unsigned int refcount;
+
+ /*
+ * This flag indicates whether or not we should destroy this object. The
+ * destruction should ONLY occurs when this flag is set and the refcount is
+ * set to zero.
+ */
+ unsigned int destroy_flag;
+
+ /*
+ * Mutex protecting the control socket to avoid out of order packets
+ * between threads sending data to the relayd. Since metadata data is sent
+ * over that socket, at least two sendmsg() are needed (header + data)
+ * creating a race for packets to overlap between threads using it.
+ */
+ pthread_mutex_t ctrl_sock_mutex;
+
+ /* Control socket. Command and metadata are passed over it */
+ struct lttcomm_sock control_sock;
+
+ /*
+ * We don't need a mutex at this point since we only splice or write single
+ * large chunk of data with a header appended at the begining. Moreover,
+ * this socket is for now only used in a single thread.
+ */
+ struct lttcomm_sock data_sock;
+ struct lttng_ht_node_ulong node;
};
/*
* Library-level data. One instance per process.
*/
struct lttng_consumer_global_data {
-
/*
* At this time, this lock is used to ensure coherence between the count
* and number of element in the hash table. It's also a protection for
*/
unsigned int need_update;
enum lttng_consumer_type type;
+
+ /*
+ * Relayd socket(s) hashtable indexed by network sequence number. Each
+ * stream has an index which associate the right relayd socket to use.
+ */
+ struct lttng_ht *relayd_ht;
};
/*
extern int consumer_update_poll_array(
struct lttng_consumer_local_data *ctx, struct pollfd **pollfd,
- struct lttng_consumer_stream **local_consumer_streams);
+ struct lttng_consumer_stream **local_consumer_streams,
+ struct lttng_ht *metadata_ht);
extern struct lttng_consumer_stream *consumer_allocate_stream(
int channel_key, int stream_key,
enum lttng_event_output output,
const char *path_name,
uid_t uid,
- gid_t gid);
+ gid_t gid,
+ int net_index,
+ int metadata_flag);
extern int consumer_add_stream(struct lttng_consumer_stream *stream);
extern void consumer_del_stream(struct lttng_consumer_stream *stream);
extern void consumer_change_stream_state(int stream_key,
uint64_t max_sb_size);
int consumer_add_channel(struct lttng_consumer_channel *channel);
+/* lttng-relayd consumer command */
+int consumer_add_relayd(struct consumer_relayd_sock_pair *relayd);
+struct consumer_relayd_sock_pair *consumer_allocate_relayd_sock_pair(
+ int net_seq_idx);
+struct consumer_relayd_sock_pair *consumer_find_relayd(int key);
+int consumer_handle_stream_before_relayd(struct lttng_consumer_stream *stream,
+ size_t data_size);
+void consumer_destroy_relayd(struct consumer_relayd_sock_pair *relayd);
+
extern struct lttng_consumer_local_data *lttng_consumer_create(
enum lttng_consumer_type type,
ssize_t (*buffer_ready)(struct lttng_consumer_stream *stream,
ssize_t lttng_consumer_read_subbuffer(struct lttng_consumer_stream *stream,
struct lttng_consumer_local_data *ctx);
int lttng_consumer_on_recv_stream(struct lttng_consumer_stream *stream);
+int consumer_add_relayd_socket(int net_seq_idx, int sock_type,
+ struct lttng_consumer_local_data *ctx, int sock,
+ struct pollfd *consumer_sockpoll, struct lttcomm_sock *relayd_sock);
+void consumer_flag_relayd_for_destroy(
+ struct consumer_relayd_sock_pair *relayd);
-#endif /* _LTTNG_CONSUMER_H */
+#endif /* LIB_CONSUMER_H */