2 * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
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.
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
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.
21 #include <common/consumer.h>
22 #include <common/hashtable/hashtable.h>
23 #include <lttng/lttng.h>
27 enum consumer_dst_type
{
32 struct consumer_socket
{
36 * To use this socket (send/recv), this lock MUST be acquired.
38 pthread_mutex_t
*lock
;
41 * Indicates if the socket was registered by a third part
42 * (REGISTER_CONSUMER) or is the spawn consumer of the session daemon.
43 * During the destroy phase of a consumer output, we close the socket if
44 * this flag is set to 1 since we don't need the fd anymore.
46 unsigned int registered
;
48 struct lttng_ht_node_ulong node
;
51 struct consumer_data
{
52 enum lttng_consumer_type type
;
54 pthread_t thread
; /* Worker thread interacting with the consumer */
56 /* Conditions used by the consumer thread to indicate readiness. */
58 pthread_condattr_t condattr
;
59 pthread_mutex_t cond_mutex
;
62 * This is a flag condition indicating that the consumer thread is ready
63 * and connected to the lttng-consumerd daemon. This flag MUST only be
64 * updated by locking the condition mutex above or before spawning a
67 * A value of 0 means that the thread is NOT ready. A value of 1 means that
68 * the thread consumer did connect successfully to the lttng-consumerd
69 * daemon. A negative value indicates that there is been an error and the
70 * thread has likely quit.
72 int consumer_thread_is_ready
;
74 /* Mutex to control consumerd pid assignation */
75 pthread_mutex_t pid_mutex
;
81 /* consumer error and command Unix socket path */
82 char err_unix_sock_path
[PATH_MAX
];
83 char cmd_unix_sock_path
[PATH_MAX
];
85 /* Health check of the thread */
86 struct health_state health
;
88 /* communication lock */
97 * Indicate if URI type is set. Those flags should only be set when the
98 * created URI is done AND valid.
104 * The following two URIs MUST have the same destination address for
105 * network streaming to work. Network hop are not yet supported.
108 /* Control path for network streaming. */
109 struct lttng_uri control
;
111 /* Data path for network streaming. */
112 struct lttng_uri data
;
114 /* Flag if network sockets were sent to the consumer. */
115 unsigned int control_sock_sent
;
116 unsigned int data_sock_sent
;
120 * Consumer output object describing where and how to send data.
122 struct consumer_output
{
123 /* If the consumer is enabled meaning that should be used */
124 unsigned int enabled
;
125 enum consumer_dst_type type
;
128 * The net_seq_index is the index of the network stream on the consumer
129 * side. It tells the consumer which streams goes to which relayd with this
130 * index. The relayd sockets are index with it on the consumer side.
135 * Subdirectory path name used for both local and network consumer.
137 char subdir
[PATH_MAX
];
140 * Hashtable of consumer_socket index by the file descriptor value. For
141 * multiarch consumer support, we can have more than one consumer (ex: 32
144 struct lttng_ht
*socks
;
147 char trace_path
[PATH_MAX
];
148 struct consumer_net net
;
152 struct consumer_socket
*consumer_find_socket(int key
,
153 struct consumer_output
*consumer
);
154 struct consumer_socket
*consumer_allocate_socket(int fd
);
155 void consumer_add_socket(struct consumer_socket
*sock
,
156 struct consumer_output
*consumer
);
157 void consumer_del_socket(struct consumer_socket
*sock
,
158 struct consumer_output
*consumer
);
159 void consumer_destroy_socket(struct consumer_socket
*sock
);
161 struct consumer_output
*consumer_create_output(enum consumer_dst_type type
);
162 struct consumer_output
*consumer_copy_output(struct consumer_output
*obj
);
163 void consumer_destroy_output(struct consumer_output
*obj
);
164 int consumer_set_network_uri(struct consumer_output
*obj
,
165 struct lttng_uri
*uri
);
166 int consumer_send_fds(int sock
, int *fds
, size_t nb_fd
);
167 int consumer_send_stream(int sock
, struct consumer_output
*dst
,
168 struct lttcomm_consumer_msg
*msg
, int *fds
, size_t nb_fd
);
169 int consumer_send_channel(int sock
, struct lttcomm_consumer_msg
*msg
);
170 int consumer_send_relayd_socket(int consumer_sock
,
171 struct lttcomm_sock
*sock
, struct consumer_output
*consumer
,
172 enum lttng_stream_type type
);
173 int consumer_send_destroy_relayd(struct consumer_socket
*sock
,
174 struct consumer_output
*consumer
);
175 void consumer_output_send_destroy_relayd(struct consumer_output
*consumer
);
176 int consumer_create_socket(struct consumer_data
*data
,
177 struct consumer_output
*output
);
178 int consumer_set_subdir(struct consumer_output
*consumer
,
179 const char *session_name
);
181 void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg
*msg
,
182 enum lttng_consumer_command cmd
,
186 enum lttng_event_output output
,
191 unsigned int metadata_flag
,
193 const char *pathname
,
194 unsigned int session_id
);
195 void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg
*msg
,
196 enum lttng_consumer_command cmd
,
198 uint64_t max_sb_size
,
201 unsigned int nb_init_streams
);
202 int consumer_is_data_pending(unsigned int id
,
203 struct consumer_output
*consumer
);
205 #endif /* _CONSUMER_H */