Commit | Line | Data |
---|---|---|
48842b30 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
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. | |
48842b30 | 7 | * |
d14d33bf AM |
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. | |
48842b30 | 12 | * |
d14d33bf AM |
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. | |
48842b30 DG |
16 | */ |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <errno.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <unistd.h> | |
24 | ||
990570ed | 25 | #include <common/common.h> |
db758600 | 26 | #include <common/consumer.h> |
990570ed | 27 | #include <common/defaults.h> |
48842b30 | 28 | |
00e2e675 | 29 | #include "consumer.h" |
48842b30 DG |
30 | #include "ust-consumer.h" |
31 | ||
32 | /* | |
37278a1e | 33 | * Send a single channel to the consumer using command ADD_CHANNEL. |
48842b30 | 34 | */ |
f50f23d9 DG |
35 | static int send_channel(struct consumer_socket *sock, |
36 | struct ust_app_channel *uchan) | |
48842b30 | 37 | { |
8010679a | 38 | int ret, fd; |
37278a1e | 39 | struct lttcomm_consumer_msg msg; |
48842b30 | 40 | |
37278a1e DG |
41 | /* Safety net */ |
42 | assert(uchan); | |
f50f23d9 | 43 | assert(sock); |
37278a1e | 44 | |
f50f23d9 | 45 | if (sock->fd < 0) { |
37278a1e DG |
46 | ret = -EINVAL; |
47 | goto error; | |
48 | } | |
48842b30 | 49 | |
37278a1e DG |
50 | DBG2("Sending channel %s to UST consumer", uchan->name); |
51 | ||
52 | consumer_init_channel_comm_msg(&msg, | |
00e2e675 DG |
53 | LTTNG_CONSUMER_ADD_CHANNEL, |
54 | uchan->obj->shm_fd, | |
55 | uchan->attr.subbuf_size, | |
56 | uchan->obj->memory_map_size, | |
c30aaa51 MD |
57 | uchan->name, |
58 | uchan->streams.count); | |
00e2e675 | 59 | |
840cb59c | 60 | health_code_update(); |
ca03de58 | 61 | |
37278a1e | 62 | ret = consumer_send_channel(sock, &msg); |
48842b30 | 63 | if (ret < 0) { |
48842b30 DG |
64 | goto error; |
65 | } | |
00e2e675 | 66 | |
840cb59c | 67 | health_code_update(); |
ca03de58 | 68 | |
8010679a | 69 | fd = uchan->obj->shm_fd; |
00e2e675 | 70 | ret = consumer_send_fds(sock, &fd, 1); |
48842b30 | 71 | if (ret < 0) { |
48842b30 DG |
72 | goto error; |
73 | } | |
74 | ||
840cb59c | 75 | health_code_update(); |
ca03de58 | 76 | |
37278a1e DG |
77 | error: |
78 | return ret; | |
79 | } | |
80 | ||
81 | /* | |
82 | * Send a single stream to the consumer using ADD_STREAM command. | |
83 | */ | |
f50f23d9 DG |
84 | static int send_channel_stream(struct consumer_socket *sock, |
85 | struct ust_app_channel *uchan, struct ust_app_session *usess, | |
030a66fa | 86 | struct ust_app_stream *stream, struct consumer_output *consumer, |
f50f23d9 | 87 | const char *pathname) |
37278a1e DG |
88 | { |
89 | int ret, fds[2]; | |
90 | struct lttcomm_consumer_msg msg; | |
91 | ||
92 | /* Safety net */ | |
93 | assert(uchan); | |
94 | assert(usess); | |
95 | assert(stream); | |
96 | assert(consumer); | |
f50f23d9 | 97 | assert(sock); |
37278a1e DG |
98 | |
99 | DBG2("Sending stream %d of channel %s to kernel consumer", | |
100 | stream->obj->shm_fd, uchan->name); | |
101 | ||
102 | consumer_init_stream_comm_msg(&msg, | |
103 | LTTNG_CONSUMER_ADD_STREAM, | |
104 | uchan->obj->shm_fd, | |
105 | stream->obj->shm_fd, | |
106 | LTTNG_CONSUMER_ACTIVE_STREAM, | |
107 | DEFAULT_UST_CHANNEL_OUTPUT, | |
108 | stream->obj->memory_map_size, | |
109 | usess->uid, | |
110 | usess->gid, | |
111 | consumer->net_seq_index, | |
112 | 0, /* Metadata flag unset */ | |
113 | stream->name, | |
ca22feea DG |
114 | pathname, |
115 | usess->id); | |
37278a1e | 116 | |
840cb59c | 117 | health_code_update(); |
ca03de58 | 118 | |
37278a1e DG |
119 | /* Send stream and file descriptor */ |
120 | fds[0] = stream->obj->shm_fd; | |
121 | fds[1] = stream->obj->wait_fd; | |
122 | ret = consumer_send_stream(sock, consumer, &msg, fds, 2); | |
123 | if (ret < 0) { | |
124 | goto error; | |
125 | } | |
126 | ||
840cb59c | 127 | health_code_update(); |
ca03de58 | 128 | |
37278a1e DG |
129 | error: |
130 | return ret; | |
131 | } | |
132 | ||
133 | /* | |
134 | * Send all stream fds of UST channel to the consumer. | |
135 | */ | |
f50f23d9 | 136 | static int send_channel_streams(struct consumer_socket *sock, |
37278a1e DG |
137 | struct ust_app_channel *uchan, struct ust_app_session *usess, |
138 | struct consumer_output *consumer) | |
139 | { | |
140 | int ret; | |
141 | char tmp_path[PATH_MAX]; | |
142 | const char *pathname; | |
030a66fa | 143 | struct ust_app_stream *stream, *tmp; |
37278a1e | 144 | |
f50f23d9 DG |
145 | assert(sock); |
146 | ||
37278a1e DG |
147 | DBG("Sending streams of channel %s to UST consumer", uchan->name); |
148 | ||
149 | ret = send_channel(sock, uchan); | |
150 | if (ret < 0) { | |
151 | goto error; | |
152 | } | |
153 | ||
00e2e675 DG |
154 | /* Get the right path name destination */ |
155 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
156 | /* Set application path to the destination path */ | |
a4b92340 DG |
157 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s/%s", |
158 | consumer->dst.trace_path, consumer->subdir, usess->path); | |
00e2e675 DG |
159 | if (ret < 0) { |
160 | PERROR("snprintf stream path"); | |
161 | goto error; | |
162 | } | |
163 | pathname = tmp_path; | |
164 | DBG3("UST local consumer tracefile path: %s", pathname); | |
165 | } else { | |
166 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
37278a1e | 167 | consumer->subdir, usess->path); |
00e2e675 DG |
168 | if (ret < 0) { |
169 | PERROR("snprintf stream path"); | |
170 | goto error; | |
171 | } | |
172 | pathname = tmp_path; | |
173 | DBG3("UST network consumer subdir path: %s", pathname); | |
174 | } | |
175 | ||
d80a6244 | 176 | cds_list_for_each_entry_safe(stream, tmp, &uchan->streams.head, list) { |
48842b30 | 177 | if (!stream->obj->shm_fd) { |
5af2f756 | 178 | continue; |
48842b30 | 179 | } |
48842b30 | 180 | |
37278a1e | 181 | ret = send_channel_stream(sock, uchan, usess, stream, consumer, |
00e2e675 | 182 | pathname); |
48842b30 | 183 | if (ret < 0) { |
48842b30 DG |
184 | goto error; |
185 | } | |
48842b30 | 186 | } |
48842b30 | 187 | |
00e2e675 | 188 | DBG("UST consumer channel streams sent"); |
48842b30 DG |
189 | |
190 | return 0; | |
191 | ||
192 | error: | |
193 | return ret; | |
194 | } | |
195 | ||
196 | /* | |
37278a1e | 197 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. |
48842b30 | 198 | */ |
f50f23d9 DG |
199 | static int send_metadata(struct consumer_socket *sock, |
200 | struct ust_app_session *usess, struct consumer_output *consumer) | |
48842b30 | 201 | { |
37278a1e | 202 | int ret, fd, fds[2]; |
00e2e675 DG |
203 | char tmp_path[PATH_MAX]; |
204 | const char *pathname; | |
37278a1e | 205 | struct lttcomm_consumer_msg msg; |
48842b30 | 206 | |
37278a1e DG |
207 | /* Safety net */ |
208 | assert(usess); | |
209 | assert(consumer); | |
f50f23d9 | 210 | assert(sock); |
48842b30 | 211 | |
f50f23d9 DG |
212 | if (sock->fd < 0) { |
213 | ERR("Consumer socket is negative (%d)", sock->fd); | |
7753dea8 MD |
214 | return -EINVAL; |
215 | } | |
216 | ||
37278a1e DG |
217 | if (usess->metadata->obj->shm_fd == 0) { |
218 | ERR("Metadata obj shm_fd is 0"); | |
219 | ret = -1; | |
220 | goto error; | |
221 | } | |
48842b30 | 222 | |
37278a1e | 223 | DBG("UST consumer sending metadata stream fd"); |
00e2e675 | 224 | |
37278a1e DG |
225 | consumer_init_channel_comm_msg(&msg, |
226 | LTTNG_CONSUMER_ADD_CHANNEL, | |
227 | usess->metadata->obj->shm_fd, | |
228 | usess->metadata->attr.subbuf_size, | |
229 | usess->metadata->obj->memory_map_size, | |
30079b6b | 230 | DEFAULT_METADATA_NAME, |
c30aaa51 | 231 | 1); |
37278a1e | 232 | |
840cb59c | 233 | health_code_update(); |
ca03de58 | 234 | |
37278a1e DG |
235 | ret = consumer_send_channel(sock, &msg); |
236 | if (ret < 0) { | |
237 | goto error; | |
238 | } | |
239 | ||
840cb59c | 240 | health_code_update(); |
ca03de58 | 241 | |
37278a1e DG |
242 | /* Sending metadata shared memory fd */ |
243 | fd = usess->metadata->obj->shm_fd; | |
244 | ret = consumer_send_fds(sock, &fd, 1); | |
245 | if (ret < 0) { | |
246 | goto error; | |
247 | } | |
00e2e675 | 248 | |
840cb59c | 249 | health_code_update(); |
ca03de58 | 250 | |
37278a1e DG |
251 | /* Get correct path name destination */ |
252 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
253 | /* Set application path to the destination path */ | |
a4b92340 DG |
254 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s/%s", |
255 | consumer->dst.trace_path, consumer->subdir, usess->path); | |
48842b30 | 256 | if (ret < 0) { |
37278a1e | 257 | PERROR("snprintf stream path"); |
48842b30 DG |
258 | goto error; |
259 | } | |
37278a1e | 260 | pathname = tmp_path; |
48842b30 | 261 | |
37278a1e DG |
262 | /* Create directory */ |
263 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, | |
264 | usess->uid, usess->gid); | |
265 | if (ret < 0) { | |
266 | if (ret != -EEXIST) { | |
267 | ERR("Trace directory creation error"); | |
00e2e675 DG |
268 | goto error; |
269 | } | |
48842b30 | 270 | } |
37278a1e DG |
271 | } else { |
272 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
273 | consumer->subdir, usess->path); | |
48842b30 | 274 | if (ret < 0) { |
37278a1e | 275 | PERROR("snprintf metadata path"); |
48842b30 DG |
276 | goto error; |
277 | } | |
37278a1e DG |
278 | pathname = tmp_path; |
279 | } | |
280 | ||
281 | consumer_init_stream_comm_msg(&msg, | |
282 | LTTNG_CONSUMER_ADD_STREAM, | |
283 | usess->metadata->obj->shm_fd, | |
284 | usess->metadata->stream_obj->shm_fd, | |
285 | LTTNG_CONSUMER_ACTIVE_STREAM, | |
286 | DEFAULT_UST_CHANNEL_OUTPUT, | |
287 | usess->metadata->stream_obj->memory_map_size, | |
288 | usess->uid, | |
289 | usess->gid, | |
290 | consumer->net_seq_index, | |
291 | 1, /* Flag metadata set */ | |
30079b6b | 292 | DEFAULT_METADATA_NAME, |
ca22feea DG |
293 | pathname, |
294 | usess->id); | |
37278a1e | 295 | |
840cb59c | 296 | health_code_update(); |
ca03de58 | 297 | |
37278a1e DG |
298 | /* Send stream and file descriptor */ |
299 | fds[0] = usess->metadata->stream_obj->shm_fd; | |
300 | fds[1] = usess->metadata->stream_obj->wait_fd; | |
301 | ret = consumer_send_stream(sock, consumer, &msg, fds, 2); | |
302 | if (ret < 0) { | |
303 | goto error; | |
304 | } | |
305 | ||
840cb59c | 306 | health_code_update(); |
ca03de58 | 307 | |
37278a1e DG |
308 | error: |
309 | return ret; | |
310 | } | |
311 | ||
312 | /* | |
313 | * Send all stream fds of the UST session to the consumer. | |
314 | */ | |
173af62f DG |
315 | int ust_consumer_send_session(struct ust_app_session *usess, |
316 | struct consumer_output *consumer, struct consumer_socket *sock) | |
37278a1e DG |
317 | { |
318 | int ret = 0; | |
37278a1e DG |
319 | struct lttng_ht_iter iter; |
320 | struct ust_app_channel *ua_chan; | |
321 | ||
173af62f | 322 | assert(usess); |
a4b92340 DG |
323 | |
324 | if (consumer == NULL || sock == NULL) { | |
325 | /* There is no consumer so just ignoring the command. */ | |
326 | DBG("UST consumer does not exist. Not sending streams"); | |
327 | return 0; | |
328 | } | |
37278a1e | 329 | |
173af62f DG |
330 | DBG("Sending metadata stream fd to consumer on %d", sock->fd); |
331 | ||
332 | pthread_mutex_lock(sock->lock); | |
37278a1e DG |
333 | |
334 | /* Sending metadata information to the consumer */ | |
f50f23d9 | 335 | ret = send_metadata(sock, usess, consumer); |
37278a1e DG |
336 | if (ret < 0) { |
337 | goto error; | |
48842b30 DG |
338 | } |
339 | ||
340 | /* Send each channel fd streams of session */ | |
341 | rcu_read_lock(); | |
bec39940 DG |
342 | cds_lfht_for_each_entry(usess->channels->ht, &iter.iter, ua_chan, |
343 | node.node) { | |
aeb96892 DG |
344 | /* |
345 | * Indicate that the channel was not created on the tracer side so skip | |
346 | * sending unexisting streams. | |
347 | */ | |
348 | if (ua_chan->obj == NULL) { | |
349 | continue; | |
350 | } | |
351 | ||
f50f23d9 | 352 | ret = send_channel_streams(sock, ua_chan, usess, consumer); |
48842b30 | 353 | if (ret < 0) { |
5485f822 | 354 | rcu_read_unlock(); |
48842b30 DG |
355 | goto error; |
356 | } | |
48842b30 DG |
357 | } |
358 | rcu_read_unlock(); | |
359 | ||
360 | DBG("consumer fds (metadata and channel streams) sent"); | |
361 | ||
173af62f DG |
362 | /* All good! */ |
363 | ret = 0; | |
48842b30 DG |
364 | |
365 | error: | |
173af62f | 366 | pthread_mutex_unlock(sock->lock); |
48842b30 DG |
367 | return ret; |
368 | } |