2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 #include <common/common.h>
26 #include <common/consumer.h>
27 #include <common/defaults.h>
30 #include "ust-consumer.h"
33 * Send a single channel to the consumer using command ADD_CHANNEL.
35 static int send_channel(int sock
, struct ust_app_channel
*uchan
)
38 struct lttcomm_consumer_msg msg
;
48 DBG2("Sending channel %s to UST consumer", uchan
->name
);
50 consumer_init_channel_comm_msg(&msg
,
51 LTTNG_CONSUMER_ADD_CHANNEL
,
53 uchan
->attr
.subbuf_size
,
54 uchan
->obj
->memory_map_size
,
56 uchan
->streams
.count
);
58 ret
= consumer_send_channel(sock
, &msg
);
63 fd
= uchan
->obj
->shm_fd
;
64 ret
= consumer_send_fds(sock
, &fd
, 1);
74 * Send a single stream to the consumer using ADD_STREAM command.
76 static int send_channel_stream(int sock
, struct ust_app_channel
*uchan
,
77 struct ust_app_session
*usess
, struct ltt_ust_stream
*stream
,
78 struct consumer_output
*consumer
, const char *pathname
)
81 struct lttcomm_consumer_msg msg
;
89 DBG2("Sending stream %d of channel %s to kernel consumer",
90 stream
->obj
->shm_fd
, uchan
->name
);
92 consumer_init_stream_comm_msg(&msg
,
93 LTTNG_CONSUMER_ADD_STREAM
,
96 LTTNG_CONSUMER_ACTIVE_STREAM
,
97 DEFAULT_UST_CHANNEL_OUTPUT
,
98 stream
->obj
->memory_map_size
,
101 consumer
->net_seq_index
,
102 0, /* Metadata flag unset */
106 /* Send stream and file descriptor */
107 fds
[0] = stream
->obj
->shm_fd
;
108 fds
[1] = stream
->obj
->wait_fd
;
109 ret
= consumer_send_stream(sock
, consumer
, &msg
, fds
, 2);
119 * Send all stream fds of UST channel to the consumer.
121 static int send_channel_streams(int sock
,
122 struct ust_app_channel
*uchan
, struct ust_app_session
*usess
,
123 struct consumer_output
*consumer
)
126 char tmp_path
[PATH_MAX
];
127 const char *pathname
;
128 struct ltt_ust_stream
*stream
, *tmp
;
130 DBG("Sending streams of channel %s to UST consumer", uchan
->name
);
132 ret
= send_channel(sock
, uchan
);
137 /* Get the right path name destination */
138 if (consumer
->type
== CONSUMER_DST_LOCAL
) {
139 /* Set application path to the destination path */
140 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s/%s/%s",
141 consumer
->dst
.trace_path
, consumer
->subdir
, usess
->path
);
143 PERROR("snprintf stream path");
147 DBG3("UST local consumer tracefile path: %s", pathname
);
149 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s/%s",
150 consumer
->subdir
, usess
->path
);
152 PERROR("snprintf stream path");
156 DBG3("UST network consumer subdir path: %s", pathname
);
159 cds_list_for_each_entry_safe(stream
, tmp
, &uchan
->streams
.head
, list
) {
160 if (!stream
->obj
->shm_fd
) {
164 ret
= send_channel_stream(sock
, uchan
, usess
, stream
, consumer
,
171 DBG("UST consumer channel streams sent");
180 * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM.
182 static int send_metadata(int sock
, struct ust_app_session
*usess
,
183 struct consumer_output
*consumer
)
186 char tmp_path
[PATH_MAX
];
187 const char *pathname
;
188 struct lttcomm_consumer_msg msg
;
195 ERR("Consumer socket is negative (%d)", sock
);
199 if (usess
->metadata
->obj
->shm_fd
== 0) {
200 ERR("Metadata obj shm_fd is 0");
205 DBG("UST consumer sending metadata stream fd");
207 consumer_init_channel_comm_msg(&msg
,
208 LTTNG_CONSUMER_ADD_CHANNEL
,
209 usess
->metadata
->obj
->shm_fd
,
210 usess
->metadata
->attr
.subbuf_size
,
211 usess
->metadata
->obj
->memory_map_size
,
215 ret
= consumer_send_channel(sock
, &msg
);
220 /* Sending metadata shared memory fd */
221 fd
= usess
->metadata
->obj
->shm_fd
;
222 ret
= consumer_send_fds(sock
, &fd
, 1);
227 /* Get correct path name destination */
228 if (consumer
->type
== CONSUMER_DST_LOCAL
) {
229 /* Set application path to the destination path */
230 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s/%s/%s",
231 consumer
->dst
.trace_path
, consumer
->subdir
, usess
->path
);
233 PERROR("snprintf stream path");
238 /* Create directory */
239 ret
= run_as_mkdir_recursive(pathname
, S_IRWXU
| S_IRWXG
,
240 usess
->uid
, usess
->gid
);
242 if (ret
!= -EEXIST
) {
243 ERR("Trace directory creation error");
248 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s/%s",
249 consumer
->subdir
, usess
->path
);
251 PERROR("snprintf metadata path");
257 consumer_init_stream_comm_msg(&msg
,
258 LTTNG_CONSUMER_ADD_STREAM
,
259 usess
->metadata
->obj
->shm_fd
,
260 usess
->metadata
->stream_obj
->shm_fd
,
261 LTTNG_CONSUMER_ACTIVE_STREAM
,
262 DEFAULT_UST_CHANNEL_OUTPUT
,
263 usess
->metadata
->stream_obj
->memory_map_size
,
266 consumer
->net_seq_index
,
267 1, /* Flag metadata set */
271 /* Send stream and file descriptor */
272 fds
[0] = usess
->metadata
->stream_obj
->shm_fd
;
273 fds
[1] = usess
->metadata
->stream_obj
->wait_fd
;
274 ret
= consumer_send_stream(sock
, consumer
, &msg
, fds
, 2);
284 * Send all stream fds of the UST session to the consumer.
286 int ust_consumer_send_session(struct ust_app_session
*usess
,
287 struct consumer_output
*consumer
, struct consumer_socket
*sock
)
290 struct lttng_ht_iter iter
;
291 struct ust_app_channel
*ua_chan
;
295 if (consumer
== NULL
|| sock
== NULL
) {
296 /* There is no consumer so just ignoring the command. */
297 DBG("UST consumer does not exist. Not sending streams");
301 DBG("Sending metadata stream fd to consumer on %d", sock
->fd
);
303 pthread_mutex_lock(sock
->lock
);
305 /* Sending metadata information to the consumer */
306 ret
= send_metadata(sock
->fd
, usess
, consumer
);
311 /* Send each channel fd streams of session */
313 cds_lfht_for_each_entry(usess
->channels
->ht
, &iter
.iter
, ua_chan
,
316 * Indicate that the channel was not created on the tracer side so skip
317 * sending unexisting streams.
319 if (ua_chan
->obj
== NULL
) {
323 ret
= send_channel_streams(sock
->fd
, ua_chan
, usess
, consumer
);
331 DBG("consumer fds (metadata and channel streams) sent");
337 pthread_mutex_unlock(sock
->lock
);