Commit | Line | Data |
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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 | */ |
37278a1e | 35 | static int send_channel(int sock, struct ust_app_channel *uchan) |
48842b30 | 36 | { |
8010679a | 37 | int ret, fd; |
37278a1e | 38 | struct lttcomm_consumer_msg msg; |
48842b30 | 39 | |
37278a1e DG |
40 | /* Safety net */ |
41 | assert(uchan); | |
42 | ||
43 | if (sock < 0) { | |
44 | ret = -EINVAL; | |
45 | goto error; | |
46 | } | |
48842b30 | 47 | |
37278a1e DG |
48 | DBG2("Sending channel %s to UST consumer", uchan->name); |
49 | ||
50 | consumer_init_channel_comm_msg(&msg, | |
00e2e675 DG |
51 | LTTNG_CONSUMER_ADD_CHANNEL, |
52 | uchan->obj->shm_fd, | |
53 | uchan->attr.subbuf_size, | |
54 | uchan->obj->memory_map_size, | |
c30aaa51 MD |
55 | uchan->name, |
56 | uchan->streams.count); | |
00e2e675 | 57 | |
37278a1e | 58 | ret = consumer_send_channel(sock, &msg); |
48842b30 | 59 | if (ret < 0) { |
48842b30 DG |
60 | goto error; |
61 | } | |
00e2e675 | 62 | |
8010679a | 63 | fd = uchan->obj->shm_fd; |
00e2e675 | 64 | ret = consumer_send_fds(sock, &fd, 1); |
48842b30 | 65 | if (ret < 0) { |
48842b30 DG |
66 | goto error; |
67 | } | |
68 | ||
37278a1e DG |
69 | error: |
70 | return ret; | |
71 | } | |
72 | ||
73 | /* | |
74 | * Send a single stream to the consumer using ADD_STREAM command. | |
75 | */ | |
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) | |
79 | { | |
80 | int ret, fds[2]; | |
81 | struct lttcomm_consumer_msg msg; | |
82 | ||
83 | /* Safety net */ | |
84 | assert(uchan); | |
85 | assert(usess); | |
86 | assert(stream); | |
87 | assert(consumer); | |
88 | ||
89 | DBG2("Sending stream %d of channel %s to kernel consumer", | |
90 | stream->obj->shm_fd, uchan->name); | |
91 | ||
92 | consumer_init_stream_comm_msg(&msg, | |
93 | LTTNG_CONSUMER_ADD_STREAM, | |
94 | uchan->obj->shm_fd, | |
95 | stream->obj->shm_fd, | |
96 | LTTNG_CONSUMER_ACTIVE_STREAM, | |
97 | DEFAULT_UST_CHANNEL_OUTPUT, | |
98 | stream->obj->memory_map_size, | |
99 | usess->uid, | |
100 | usess->gid, | |
101 | consumer->net_seq_index, | |
102 | 0, /* Metadata flag unset */ | |
103 | stream->name, | |
104 | pathname); | |
105 | ||
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); | |
110 | if (ret < 0) { | |
111 | goto error; | |
112 | } | |
113 | ||
114 | error: | |
115 | return ret; | |
116 | } | |
117 | ||
118 | /* | |
119 | * Send all stream fds of UST channel to the consumer. | |
120 | */ | |
173af62f | 121 | static int send_channel_streams(int sock, |
37278a1e DG |
122 | struct ust_app_channel *uchan, struct ust_app_session *usess, |
123 | struct consumer_output *consumer) | |
124 | { | |
125 | int ret; | |
126 | char tmp_path[PATH_MAX]; | |
127 | const char *pathname; | |
128 | struct ltt_ust_stream *stream, *tmp; | |
129 | ||
130 | DBG("Sending streams of channel %s to UST consumer", uchan->name); | |
131 | ||
132 | ret = send_channel(sock, uchan); | |
133 | if (ret < 0) { | |
134 | goto error; | |
135 | } | |
136 | ||
00e2e675 DG |
137 | /* Get the right path name destination */ |
138 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
139 | /* Set application path to the destination path */ | |
a4b92340 DG |
140 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s/%s", |
141 | consumer->dst.trace_path, consumer->subdir, usess->path); | |
00e2e675 DG |
142 | if (ret < 0) { |
143 | PERROR("snprintf stream path"); | |
144 | goto error; | |
145 | } | |
146 | pathname = tmp_path; | |
147 | DBG3("UST local consumer tracefile path: %s", pathname); | |
148 | } else { | |
149 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
37278a1e | 150 | consumer->subdir, usess->path); |
00e2e675 DG |
151 | if (ret < 0) { |
152 | PERROR("snprintf stream path"); | |
153 | goto error; | |
154 | } | |
155 | pathname = tmp_path; | |
156 | DBG3("UST network consumer subdir path: %s", pathname); | |
157 | } | |
158 | ||
d80a6244 | 159 | cds_list_for_each_entry_safe(stream, tmp, &uchan->streams.head, list) { |
48842b30 | 160 | if (!stream->obj->shm_fd) { |
5af2f756 | 161 | continue; |
48842b30 | 162 | } |
48842b30 | 163 | |
37278a1e | 164 | ret = send_channel_stream(sock, uchan, usess, stream, consumer, |
00e2e675 | 165 | pathname); |
48842b30 | 166 | if (ret < 0) { |
48842b30 DG |
167 | goto error; |
168 | } | |
48842b30 | 169 | } |
48842b30 | 170 | |
00e2e675 | 171 | DBG("UST consumer channel streams sent"); |
48842b30 DG |
172 | |
173 | return 0; | |
174 | ||
175 | error: | |
176 | return ret; | |
177 | } | |
178 | ||
179 | /* | |
37278a1e | 180 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. |
48842b30 | 181 | */ |
173af62f | 182 | static int send_metadata(int sock, struct ust_app_session *usess, |
00e2e675 | 183 | struct consumer_output *consumer) |
48842b30 | 184 | { |
37278a1e | 185 | int ret, fd, fds[2]; |
00e2e675 DG |
186 | char tmp_path[PATH_MAX]; |
187 | const char *pathname; | |
37278a1e | 188 | struct lttcomm_consumer_msg msg; |
48842b30 | 189 | |
37278a1e DG |
190 | /* Safety net */ |
191 | assert(usess); | |
192 | assert(consumer); | |
48842b30 | 193 | |
37278a1e DG |
194 | if (sock < 0) { |
195 | ERR("Consumer socket is negative (%d)", sock); | |
7753dea8 MD |
196 | return -EINVAL; |
197 | } | |
198 | ||
37278a1e DG |
199 | if (usess->metadata->obj->shm_fd == 0) { |
200 | ERR("Metadata obj shm_fd is 0"); | |
201 | ret = -1; | |
202 | goto error; | |
203 | } | |
48842b30 | 204 | |
37278a1e | 205 | DBG("UST consumer sending metadata stream fd"); |
00e2e675 | 206 | |
37278a1e DG |
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, | |
c30aaa51 MD |
212 | "metadata", |
213 | 1); | |
37278a1e DG |
214 | |
215 | ret = consumer_send_channel(sock, &msg); | |
216 | if (ret < 0) { | |
217 | goto error; | |
218 | } | |
219 | ||
220 | /* Sending metadata shared memory fd */ | |
221 | fd = usess->metadata->obj->shm_fd; | |
222 | ret = consumer_send_fds(sock, &fd, 1); | |
223 | if (ret < 0) { | |
224 | goto error; | |
225 | } | |
00e2e675 | 226 | |
37278a1e DG |
227 | /* Get correct path name destination */ |
228 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
229 | /* Set application path to the destination path */ | |
a4b92340 DG |
230 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s/%s", |
231 | consumer->dst.trace_path, consumer->subdir, usess->path); | |
48842b30 | 232 | if (ret < 0) { |
37278a1e | 233 | PERROR("snprintf stream path"); |
48842b30 DG |
234 | goto error; |
235 | } | |
37278a1e | 236 | pathname = tmp_path; |
48842b30 | 237 | |
37278a1e DG |
238 | /* Create directory */ |
239 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, | |
240 | usess->uid, usess->gid); | |
241 | if (ret < 0) { | |
242 | if (ret != -EEXIST) { | |
243 | ERR("Trace directory creation error"); | |
00e2e675 DG |
244 | goto error; |
245 | } | |
48842b30 | 246 | } |
37278a1e DG |
247 | } else { |
248 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
249 | consumer->subdir, usess->path); | |
48842b30 | 250 | if (ret < 0) { |
37278a1e | 251 | PERROR("snprintf metadata path"); |
48842b30 DG |
252 | goto error; |
253 | } | |
37278a1e DG |
254 | pathname = tmp_path; |
255 | } | |
256 | ||
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, | |
264 | usess->uid, | |
265 | usess->gid, | |
266 | consumer->net_seq_index, | |
267 | 1, /* Flag metadata set */ | |
268 | "metadata", | |
269 | pathname); | |
270 | ||
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); | |
275 | if (ret < 0) { | |
276 | goto error; | |
277 | } | |
278 | ||
279 | error: | |
280 | return ret; | |
281 | } | |
282 | ||
283 | /* | |
284 | * Send all stream fds of the UST session to the consumer. | |
285 | */ | |
173af62f DG |
286 | int ust_consumer_send_session(struct ust_app_session *usess, |
287 | struct consumer_output *consumer, struct consumer_socket *sock) | |
37278a1e DG |
288 | { |
289 | int ret = 0; | |
37278a1e DG |
290 | struct lttng_ht_iter iter; |
291 | struct ust_app_channel *ua_chan; | |
292 | ||
173af62f | 293 | assert(usess); |
a4b92340 DG |
294 | |
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"); | |
298 | return 0; | |
299 | } | |
37278a1e | 300 | |
173af62f DG |
301 | DBG("Sending metadata stream fd to consumer on %d", sock->fd); |
302 | ||
303 | pthread_mutex_lock(sock->lock); | |
37278a1e DG |
304 | |
305 | /* Sending metadata information to the consumer */ | |
173af62f | 306 | ret = send_metadata(sock->fd, usess, consumer); |
37278a1e DG |
307 | if (ret < 0) { |
308 | goto error; | |
48842b30 DG |
309 | } |
310 | ||
311 | /* Send each channel fd streams of session */ | |
312 | rcu_read_lock(); | |
bec39940 DG |
313 | cds_lfht_for_each_entry(usess->channels->ht, &iter.iter, ua_chan, |
314 | node.node) { | |
aeb96892 DG |
315 | /* |
316 | * Indicate that the channel was not created on the tracer side so skip | |
317 | * sending unexisting streams. | |
318 | */ | |
319 | if (ua_chan->obj == NULL) { | |
320 | continue; | |
321 | } | |
322 | ||
173af62f | 323 | ret = send_channel_streams(sock->fd, ua_chan, usess, consumer); |
48842b30 | 324 | if (ret < 0) { |
5485f822 | 325 | rcu_read_unlock(); |
48842b30 DG |
326 | goto error; |
327 | } | |
48842b30 DG |
328 | } |
329 | rcu_read_unlock(); | |
330 | ||
331 | DBG("consumer fds (metadata and channel streams) sent"); | |
332 | ||
173af62f DG |
333 | /* All good! */ |
334 | ret = 0; | |
48842b30 DG |
335 | |
336 | error: | |
173af62f | 337 | pthread_mutex_unlock(sock->lock); |
48842b30 DG |
338 | return ret; |
339 | } |