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f1e16794 DG |
1 | /* |
2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
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. | |
7 | * | |
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 | |
11 | * more details. | |
12 | * | |
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. | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
22 | #include <sys/stat.h> | |
23 | #include <unistd.h> | |
24 | ||
25 | #include <common/common.h> | |
26 | #include <common/defaults.h> | |
f1e16794 | 27 | |
00e2e675 | 28 | #include "consumer.h" |
7972aab2 | 29 | #include "health.h" |
f1e16794 DG |
30 | #include "kernel-consumer.h" |
31 | ||
00e2e675 DG |
32 | /* |
33 | * Sending a single channel to the consumer with command ADD_CHANNEL. | |
34 | */ | |
f50f23d9 | 35 | int kernel_consumer_add_channel(struct consumer_socket *sock, |
ffe60014 | 36 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session) |
00e2e675 DG |
37 | { |
38 | int ret; | |
ffe60014 DG |
39 | char tmp_path[PATH_MAX]; |
40 | const char *pathname; | |
00e2e675 | 41 | struct lttcomm_consumer_msg lkm; |
ffe60014 | 42 | struct consumer_output *consumer; |
00e2e675 DG |
43 | |
44 | /* Safety net */ | |
45 | assert(channel); | |
ffe60014 DG |
46 | assert(session); |
47 | assert(session->consumer); | |
48 | ||
49 | consumer = session->consumer; | |
00e2e675 DG |
50 | |
51 | DBG("Kernel consumer adding channel %s to kernel consumer", | |
52 | channel->channel->name); | |
53 | ||
ffe60014 DG |
54 | /* Get the right path name destination */ |
55 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
56 | /* Set application path to the destination path */ | |
57 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
58 | consumer->dst.trace_path, consumer->subdir); | |
59 | if (ret < 0) { | |
60 | PERROR("snprintf metadata path"); | |
61 | goto error; | |
62 | } | |
63 | pathname = tmp_path; | |
64 | ||
65 | /* Create directory */ | |
66 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, | |
67 | session->uid, session->gid); | |
68 | if (ret < 0) { | |
69 | if (ret != -EEXIST) { | |
70 | ERR("Trace directory creation error"); | |
71 | goto error; | |
72 | } | |
73 | } | |
74 | DBG3("Kernel local consumer tracefile path: %s", pathname); | |
75 | } else { | |
76 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir); | |
77 | if (ret < 0) { | |
78 | PERROR("snprintf metadata path"); | |
79 | goto error; | |
80 | } | |
81 | pathname = tmp_path; | |
82 | DBG3("Kernel network consumer subdir path: %s", pathname); | |
83 | } | |
84 | ||
00e2e675 DG |
85 | /* Prep channel message structure */ |
86 | consumer_init_channel_comm_msg(&lkm, | |
87 | LTTNG_CONSUMER_ADD_CHANNEL, | |
88 | channel->fd, | |
ffe60014 DG |
89 | session->id, |
90 | pathname, | |
91 | session->uid, | |
92 | session->gid, | |
93 | consumer->net_seq_index, | |
c30aaa51 | 94 | channel->channel->name, |
ffe60014 DG |
95 | channel->stream_count, |
96 | channel->channel->attr.output, | |
97 | CONSUMER_CHANNEL_TYPE_DATA); | |
00e2e675 | 98 | |
840cb59c | 99 | health_code_update(); |
ca03de58 | 100 | |
00e2e675 DG |
101 | ret = consumer_send_channel(sock, &lkm); |
102 | if (ret < 0) { | |
103 | goto error; | |
104 | } | |
105 | ||
840cb59c | 106 | health_code_update(); |
ca03de58 | 107 | |
00e2e675 DG |
108 | error: |
109 | return ret; | |
110 | } | |
111 | ||
112 | /* | |
113 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. | |
114 | */ | |
f50f23d9 DG |
115 | int kernel_consumer_add_metadata(struct consumer_socket *sock, |
116 | struct ltt_kernel_session *session) | |
00e2e675 DG |
117 | { |
118 | int ret; | |
a7d9a3e7 | 119 | char tmp_path[PATH_MAX]; |
00e2e675 DG |
120 | const char *pathname; |
121 | struct lttcomm_consumer_msg lkm; | |
a7d9a3e7 | 122 | struct consumer_output *consumer; |
00e2e675 DG |
123 | |
124 | /* Safety net */ | |
125 | assert(session); | |
126 | assert(session->consumer); | |
f50f23d9 | 127 | assert(sock); |
00e2e675 DG |
128 | |
129 | DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd); | |
130 | ||
131 | /* Get consumer output pointer */ | |
a7d9a3e7 | 132 | consumer = session->consumer; |
00e2e675 | 133 | |
a7d9a3e7 DG |
134 | /* Get the right path name destination */ |
135 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
136 | /* Set application path to the destination path */ | |
137 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
138 | consumer->dst.trace_path, consumer->subdir); | |
139 | if (ret < 0) { | |
140 | PERROR("snprintf metadata path"); | |
141 | goto error; | |
142 | } | |
143 | pathname = tmp_path; | |
144 | ||
145 | /* Create directory */ | |
146 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, | |
147 | session->uid, session->gid); | |
148 | if (ret < 0) { | |
149 | if (ret != -EEXIST) { | |
150 | ERR("Trace directory creation error"); | |
151 | goto error; | |
152 | } | |
153 | } | |
154 | DBG3("Kernel local consumer tracefile path: %s", pathname); | |
00e2e675 | 155 | } else { |
a7d9a3e7 DG |
156 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir); |
157 | if (ret < 0) { | |
158 | PERROR("snprintf metadata path"); | |
159 | goto error; | |
160 | } | |
161 | pathname = tmp_path; | |
162 | DBG3("Kernel network consumer subdir path: %s", pathname); | |
00e2e675 DG |
163 | } |
164 | ||
165 | /* Prep channel message structure */ | |
166 | consumer_init_channel_comm_msg(&lkm, | |
167 | LTTNG_CONSUMER_ADD_CHANNEL, | |
168 | session->metadata->fd, | |
ffe60014 DG |
169 | session->id, |
170 | pathname, | |
171 | session->uid, | |
172 | session->gid, | |
173 | consumer->net_seq_index, | |
30079b6b | 174 | DEFAULT_METADATA_NAME, |
ffe60014 DG |
175 | 1, |
176 | DEFAULT_KERNEL_CHANNEL_OUTPUT, | |
177 | CONSUMER_CHANNEL_TYPE_METADATA); | |
00e2e675 | 178 | |
840cb59c | 179 | health_code_update(); |
ca03de58 | 180 | |
00e2e675 DG |
181 | ret = consumer_send_channel(sock, &lkm); |
182 | if (ret < 0) { | |
183 | goto error; | |
184 | } | |
185 | ||
840cb59c | 186 | health_code_update(); |
ca03de58 | 187 | |
00e2e675 DG |
188 | /* Prep stream message structure */ |
189 | consumer_init_stream_comm_msg(&lkm, | |
190 | LTTNG_CONSUMER_ADD_STREAM, | |
191 | session->metadata->fd, | |
192 | session->metadata_stream_fd, | |
ffe60014 | 193 | 0); /* CPU: 0 for metadata. */ |
00e2e675 | 194 | |
840cb59c | 195 | health_code_update(); |
ca03de58 | 196 | |
00e2e675 | 197 | /* Send stream and file descriptor */ |
a7d9a3e7 | 198 | ret = consumer_send_stream(sock, consumer, &lkm, |
00e2e675 DG |
199 | &session->metadata_stream_fd, 1); |
200 | if (ret < 0) { | |
201 | goto error; | |
202 | } | |
203 | ||
840cb59c | 204 | health_code_update(); |
ca03de58 | 205 | |
00e2e675 DG |
206 | error: |
207 | return ret; | |
208 | } | |
209 | ||
210 | /* | |
211 | * Sending a single stream to the consumer with command ADD_STREAM. | |
212 | */ | |
f50f23d9 DG |
213 | int kernel_consumer_add_stream(struct consumer_socket *sock, |
214 | struct ltt_kernel_channel *channel, struct ltt_kernel_stream *stream, | |
215 | struct ltt_kernel_session *session) | |
00e2e675 DG |
216 | { |
217 | int ret; | |
00e2e675 | 218 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 219 | struct consumer_output *consumer; |
00e2e675 DG |
220 | |
221 | assert(channel); | |
222 | assert(stream); | |
223 | assert(session); | |
224 | assert(session->consumer); | |
f50f23d9 | 225 | assert(sock); |
00e2e675 DG |
226 | |
227 | DBG("Sending stream %d of channel %s to kernel consumer", | |
228 | stream->fd, channel->channel->name); | |
229 | ||
230 | /* Get consumer output pointer */ | |
a7d9a3e7 | 231 | consumer = session->consumer; |
00e2e675 | 232 | |
00e2e675 | 233 | /* Prep stream consumer message */ |
ffe60014 DG |
234 | consumer_init_stream_comm_msg(&lkm, |
235 | LTTNG_CONSUMER_ADD_STREAM, | |
00e2e675 DG |
236 | channel->fd, |
237 | stream->fd, | |
ffe60014 | 238 | stream->cpu); |
00e2e675 | 239 | |
840cb59c | 240 | health_code_update(); |
ca03de58 | 241 | |
00e2e675 | 242 | /* Send stream and file descriptor */ |
a7d9a3e7 | 243 | ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1); |
00e2e675 DG |
244 | if (ret < 0) { |
245 | goto error; | |
246 | } | |
247 | ||
840cb59c | 248 | health_code_update(); |
ca03de58 | 249 | |
00e2e675 DG |
250 | error: |
251 | return ret; | |
252 | } | |
253 | ||
f1e16794 DG |
254 | /* |
255 | * Send all stream fds of kernel channel to the consumer. | |
256 | */ | |
f50f23d9 | 257 | int kernel_consumer_send_channel_stream(struct consumer_socket *sock, |
00e2e675 | 258 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session) |
f1e16794 | 259 | { |
00e2e675 | 260 | int ret; |
f1e16794 | 261 | struct ltt_kernel_stream *stream; |
00e2e675 DG |
262 | |
263 | /* Safety net */ | |
264 | assert(channel); | |
265 | assert(session); | |
266 | assert(session->consumer); | |
f50f23d9 | 267 | assert(sock); |
00e2e675 DG |
268 | |
269 | /* Bail out if consumer is disabled */ | |
270 | if (!session->consumer->enabled) { | |
f73fabfd | 271 | ret = LTTNG_OK; |
00e2e675 DG |
272 | goto error; |
273 | } | |
f1e16794 DG |
274 | |
275 | DBG("Sending streams of channel %s to kernel consumer", | |
276 | channel->channel->name); | |
277 | ||
ffe60014 | 278 | ret = kernel_consumer_add_channel(sock, channel, session); |
f1e16794 | 279 | if (ret < 0) { |
f1e16794 DG |
280 | goto error; |
281 | } | |
282 | ||
283 | /* Send streams */ | |
284 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
285 | if (!stream->fd) { | |
286 | continue; | |
287 | } | |
00e2e675 DG |
288 | |
289 | /* Add stream on the kernel consumer side. */ | |
290 | ret = kernel_consumer_add_stream(sock, channel, stream, session); | |
f1e16794 | 291 | if (ret < 0) { |
f1e16794 DG |
292 | goto error; |
293 | } | |
294 | } | |
295 | ||
f1e16794 DG |
296 | error: |
297 | return ret; | |
298 | } | |
299 | ||
300 | /* | |
301 | * Send all stream fds of the kernel session to the consumer. | |
302 | */ | |
f50f23d9 DG |
303 | int kernel_consumer_send_session(struct consumer_socket *sock, |
304 | struct ltt_kernel_session *session) | |
f1e16794 DG |
305 | { |
306 | int ret; | |
307 | struct ltt_kernel_channel *chan; | |
f1e16794 | 308 | |
00e2e675 DG |
309 | /* Safety net */ |
310 | assert(session); | |
311 | assert(session->consumer); | |
f50f23d9 | 312 | assert(sock); |
f1e16794 | 313 | |
00e2e675 DG |
314 | /* Bail out if consumer is disabled */ |
315 | if (!session->consumer->enabled) { | |
f73fabfd | 316 | ret = LTTNG_OK; |
00e2e675 | 317 | goto error; |
f1e16794 DG |
318 | } |
319 | ||
00e2e675 DG |
320 | DBG("Sending session stream to kernel consumer"); |
321 | ||
f1e16794 | 322 | if (session->metadata_stream_fd >= 0) { |
00e2e675 | 323 | ret = kernel_consumer_add_metadata(sock, session); |
f1e16794 | 324 | if (ret < 0) { |
f1e16794 DG |
325 | goto error; |
326 | } | |
327 | ||
00e2e675 DG |
328 | /* Flag that at least the metadata has been sent to the consumer. */ |
329 | session->consumer_fds_sent = 1; | |
f1e16794 DG |
330 | } |
331 | ||
00e2e675 | 332 | /* Send channel and streams of it */ |
f1e16794 | 333 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
00e2e675 | 334 | ret = kernel_consumer_send_channel_stream(sock, chan, session); |
f1e16794 DG |
335 | if (ret < 0) { |
336 | goto error; | |
337 | } | |
338 | } | |
339 | ||
00e2e675 | 340 | DBG("Kernel consumer FDs of metadata and channel streams sent"); |
f1e16794 DG |
341 | |
342 | return 0; | |
343 | ||
344 | error: | |
345 | return ret; | |
346 | } |