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.
25 #include <common/common.h>
26 #include <common/defaults.h>
29 #include "kernel-consumer.h"
32 * Sending a single channel to the consumer with command ADD_CHANNEL.
34 int kernel_consumer_add_channel(int sock
, struct ltt_kernel_channel
*channel
)
37 struct lttcomm_consumer_msg lkm
;
42 DBG("Kernel consumer adding channel %s to kernel consumer",
43 channel
->channel
->name
);
45 /* Prep channel message structure */
46 consumer_init_channel_comm_msg(&lkm
,
47 LTTNG_CONSUMER_ADD_CHANNEL
,
49 channel
->channel
->attr
.subbuf_size
,
51 channel
->channel
->name
);
53 ret
= consumer_send_channel(sock
, &lkm
);
63 * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM.
65 int kernel_consumer_add_metadata(int sock
, struct ltt_kernel_session
*session
)
68 char tmp_path
[PATH_MAX
];
70 struct lttcomm_consumer_msg lkm
;
71 struct consumer_output
*consumer
;
75 assert(session
->consumer
);
77 DBG("Sending metadata %d to kernel consumer", session
->metadata_stream_fd
);
79 /* Get consumer output pointer */
80 consumer
= session
->consumer
;
82 /* Get the right path name destination */
83 if (consumer
->type
== CONSUMER_DST_LOCAL
) {
84 /* Set application path to the destination path */
85 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s/%s",
86 consumer
->dst
.trace_path
, consumer
->subdir
);
88 PERROR("snprintf metadata path");
93 /* Create directory */
94 ret
= run_as_mkdir_recursive(pathname
, S_IRWXU
| S_IRWXG
,
95 session
->uid
, session
->gid
);
98 ERR("Trace directory creation error");
102 DBG3("Kernel local consumer tracefile path: %s", pathname
);
104 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s", consumer
->subdir
);
106 PERROR("snprintf metadata path");
110 DBG3("Kernel network consumer subdir path: %s", pathname
);
113 /* Prep channel message structure */
114 consumer_init_channel_comm_msg(&lkm
,
115 LTTNG_CONSUMER_ADD_CHANNEL
,
116 session
->metadata
->fd
,
117 session
->metadata
->conf
->attr
.subbuf_size
,
121 ret
= consumer_send_channel(sock
, &lkm
);
126 /* Prep stream message structure */
127 consumer_init_stream_comm_msg(&lkm
,
128 LTTNG_CONSUMER_ADD_STREAM
,
129 session
->metadata
->fd
,
130 session
->metadata_stream_fd
,
131 LTTNG_CONSUMER_ACTIVE_STREAM
,
132 DEFAULT_KERNEL_CHANNEL_OUTPUT
,
136 consumer
->net_seq_index
,
137 1, /* Metadata flag set */
141 /* Send stream and file descriptor */
142 ret
= consumer_send_stream(sock
, consumer
, &lkm
,
143 &session
->metadata_stream_fd
, 1);
153 * Sending a single stream to the consumer with command ADD_STREAM.
155 int kernel_consumer_add_stream(int sock
, struct ltt_kernel_channel
*channel
,
156 struct ltt_kernel_stream
*stream
, struct ltt_kernel_session
*session
)
159 char tmp_path
[PATH_MAX
];
160 const char *pathname
;
161 struct lttcomm_consumer_msg lkm
;
162 struct consumer_output
*consumer
;
167 assert(session
->consumer
);
169 DBG("Sending stream %d of channel %s to kernel consumer",
170 stream
->fd
, channel
->channel
->name
);
172 /* Get consumer output pointer */
173 consumer
= session
->consumer
;
175 /* Get the right path name destination */
176 if (consumer
->type
== CONSUMER_DST_LOCAL
) {
177 /* Set application path to the destination path */
178 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s/%s",
179 consumer
->dst
.trace_path
, consumer
->subdir
);
181 PERROR("snprintf stream path");
185 DBG3("Kernel local consumer tracefile path: %s", pathname
);
187 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s", consumer
->subdir
);
189 PERROR("snprintf stream path");
193 DBG3("Kernel network consumer subdir path: %s", pathname
);
196 /* Prep stream consumer message */
197 consumer_init_stream_comm_msg(&lkm
, LTTNG_CONSUMER_ADD_STREAM
,
201 channel
->channel
->attr
.output
,
205 consumer
->net_seq_index
,
206 0, /* Metadata flag unset */
210 /* Send stream and file descriptor */
211 ret
= consumer_send_stream(sock
, consumer
, &lkm
, &stream
->fd
, 1);
221 * Send all stream fds of kernel channel to the consumer.
223 int kernel_consumer_send_channel_stream(int sock
,
224 struct ltt_kernel_channel
*channel
, struct ltt_kernel_session
*session
)
227 struct ltt_kernel_stream
*stream
;
232 assert(session
->consumer
);
234 /* Bail out if consumer is disabled */
235 if (!session
->consumer
->enabled
) {
240 DBG("Sending streams of channel %s to kernel consumer",
241 channel
->channel
->name
);
243 ret
= kernel_consumer_add_channel(sock
, channel
);
249 cds_list_for_each_entry(stream
, &channel
->stream_list
.head
, list
) {
254 /* Add stream on the kernel consumer side. */
255 ret
= kernel_consumer_add_stream(sock
, channel
, stream
, session
);
266 * Send all stream fds of the kernel session to the consumer.
268 int kernel_consumer_send_session(int sock
, struct ltt_kernel_session
*session
)
271 struct ltt_kernel_channel
*chan
;
275 assert(session
->consumer
);
277 /* Bail out if consumer is disabled */
278 if (!session
->consumer
->enabled
) {
283 DBG("Sending session stream to kernel consumer");
285 if (session
->metadata_stream_fd
>= 0) {
286 ret
= kernel_consumer_add_metadata(sock
, session
);
291 /* Flag that at least the metadata has been sent to the consumer. */
292 session
->consumer_fds_sent
= 1;
295 /* Send channel and streams of it */
296 cds_list_for_each_entry(chan
, &session
->channel_list
.head
, list
) {
297 ret
= kernel_consumer_send_channel_stream(sock
, chan
, session
);
303 DBG("Kernel consumer FDs of metadata and channel streams sent");