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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" |
f1e16794 DG |
29 | #include "kernel-consumer.h" |
30 | ||
00e2e675 DG |
31 | /* |
32 | * Sending a single channel to the consumer with command ADD_CHANNEL. | |
33 | */ | |
f50f23d9 DG |
34 | int kernel_consumer_add_channel(struct consumer_socket *sock, |
35 | struct ltt_kernel_channel *channel) | |
00e2e675 DG |
36 | { |
37 | int ret; | |
38 | struct lttcomm_consumer_msg lkm; | |
39 | ||
40 | /* Safety net */ | |
41 | assert(channel); | |
42 | ||
43 | DBG("Kernel consumer adding channel %s to kernel consumer", | |
44 | channel->channel->name); | |
45 | ||
46 | /* Prep channel message structure */ | |
47 | consumer_init_channel_comm_msg(&lkm, | |
48 | LTTNG_CONSUMER_ADD_CHANNEL, | |
49 | channel->fd, | |
50 | channel->channel->attr.subbuf_size, | |
51 | 0, /* Kernel */ | |
c30aaa51 MD |
52 | channel->channel->name, |
53 | channel->stream_count); | |
00e2e675 DG |
54 | |
55 | ret = consumer_send_channel(sock, &lkm); | |
56 | if (ret < 0) { | |
57 | goto error; | |
58 | } | |
59 | ||
60 | error: | |
61 | return ret; | |
62 | } | |
63 | ||
64 | /* | |
65 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. | |
66 | */ | |
f50f23d9 DG |
67 | int kernel_consumer_add_metadata(struct consumer_socket *sock, |
68 | struct ltt_kernel_session *session) | |
00e2e675 DG |
69 | { |
70 | int ret; | |
a7d9a3e7 | 71 | char tmp_path[PATH_MAX]; |
00e2e675 DG |
72 | const char *pathname; |
73 | struct lttcomm_consumer_msg lkm; | |
a7d9a3e7 | 74 | struct consumer_output *consumer; |
00e2e675 DG |
75 | |
76 | /* Safety net */ | |
77 | assert(session); | |
78 | assert(session->consumer); | |
f50f23d9 | 79 | assert(sock); |
00e2e675 DG |
80 | |
81 | DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd); | |
82 | ||
83 | /* Get consumer output pointer */ | |
a7d9a3e7 | 84 | consumer = session->consumer; |
00e2e675 | 85 | |
a7d9a3e7 DG |
86 | /* Get the right path name destination */ |
87 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
88 | /* Set application path to the destination path */ | |
89 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
90 | consumer->dst.trace_path, consumer->subdir); | |
91 | if (ret < 0) { | |
92 | PERROR("snprintf metadata path"); | |
93 | goto error; | |
94 | } | |
95 | pathname = tmp_path; | |
96 | ||
97 | /* Create directory */ | |
98 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, | |
99 | session->uid, session->gid); | |
100 | if (ret < 0) { | |
101 | if (ret != -EEXIST) { | |
102 | ERR("Trace directory creation error"); | |
103 | goto error; | |
104 | } | |
105 | } | |
106 | DBG3("Kernel local consumer tracefile path: %s", pathname); | |
00e2e675 | 107 | } else { |
a7d9a3e7 DG |
108 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir); |
109 | if (ret < 0) { | |
110 | PERROR("snprintf metadata path"); | |
111 | goto error; | |
112 | } | |
113 | pathname = tmp_path; | |
114 | DBG3("Kernel network consumer subdir path: %s", pathname); | |
00e2e675 DG |
115 | } |
116 | ||
117 | /* Prep channel message structure */ | |
118 | consumer_init_channel_comm_msg(&lkm, | |
119 | LTTNG_CONSUMER_ADD_CHANNEL, | |
120 | session->metadata->fd, | |
121 | session->metadata->conf->attr.subbuf_size, | |
122 | 0, /* for kernel */ | |
c30aaa51 MD |
123 | "metadata", |
124 | 1); | |
00e2e675 DG |
125 | |
126 | ret = consumer_send_channel(sock, &lkm); | |
127 | if (ret < 0) { | |
128 | goto error; | |
129 | } | |
130 | ||
131 | /* Prep stream message structure */ | |
132 | consumer_init_stream_comm_msg(&lkm, | |
133 | LTTNG_CONSUMER_ADD_STREAM, | |
134 | session->metadata->fd, | |
135 | session->metadata_stream_fd, | |
136 | LTTNG_CONSUMER_ACTIVE_STREAM, | |
137 | DEFAULT_KERNEL_CHANNEL_OUTPUT, | |
138 | 0, /* Kernel */ | |
139 | session->uid, | |
140 | session->gid, | |
a7d9a3e7 | 141 | consumer->net_seq_index, |
00e2e675 DG |
142 | 1, /* Metadata flag set */ |
143 | "metadata", | |
ca22feea DG |
144 | pathname, |
145 | session->id); | |
00e2e675 DG |
146 | |
147 | /* Send stream and file descriptor */ | |
a7d9a3e7 | 148 | ret = consumer_send_stream(sock, consumer, &lkm, |
00e2e675 DG |
149 | &session->metadata_stream_fd, 1); |
150 | if (ret < 0) { | |
151 | goto error; | |
152 | } | |
153 | ||
154 | error: | |
155 | return ret; | |
156 | } | |
157 | ||
158 | /* | |
159 | * Sending a single stream to the consumer with command ADD_STREAM. | |
160 | */ | |
f50f23d9 DG |
161 | int kernel_consumer_add_stream(struct consumer_socket *sock, |
162 | struct ltt_kernel_channel *channel, struct ltt_kernel_stream *stream, | |
163 | struct ltt_kernel_session *session) | |
00e2e675 DG |
164 | { |
165 | int ret; | |
a7d9a3e7 | 166 | char tmp_path[PATH_MAX]; |
00e2e675 DG |
167 | const char *pathname; |
168 | struct lttcomm_consumer_msg lkm; | |
a7d9a3e7 | 169 | struct consumer_output *consumer; |
00e2e675 DG |
170 | |
171 | assert(channel); | |
172 | assert(stream); | |
173 | assert(session); | |
174 | assert(session->consumer); | |
f50f23d9 | 175 | assert(sock); |
00e2e675 DG |
176 | |
177 | DBG("Sending stream %d of channel %s to kernel consumer", | |
178 | stream->fd, channel->channel->name); | |
179 | ||
180 | /* Get consumer output pointer */ | |
a7d9a3e7 | 181 | consumer = session->consumer; |
00e2e675 | 182 | |
a7d9a3e7 DG |
183 | /* Get the right path name destination */ |
184 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
185 | /* Set application path to the destination path */ | |
186 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
187 | consumer->dst.trace_path, consumer->subdir); | |
188 | if (ret < 0) { | |
189 | PERROR("snprintf stream path"); | |
190 | goto error; | |
191 | } | |
192 | pathname = tmp_path; | |
193 | DBG3("Kernel local consumer tracefile path: %s", pathname); | |
00e2e675 | 194 | } else { |
a7d9a3e7 DG |
195 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir); |
196 | if (ret < 0) { | |
197 | PERROR("snprintf stream path"); | |
198 | goto error; | |
199 | } | |
200 | pathname = tmp_path; | |
201 | DBG3("Kernel network consumer subdir path: %s", pathname); | |
00e2e675 DG |
202 | } |
203 | ||
204 | /* Prep stream consumer message */ | |
205 | consumer_init_stream_comm_msg(&lkm, LTTNG_CONSUMER_ADD_STREAM, | |
206 | channel->fd, | |
207 | stream->fd, | |
208 | stream->state, | |
209 | channel->channel->attr.output, | |
210 | 0, /* Kernel */ | |
211 | session->uid, | |
212 | session->gid, | |
a7d9a3e7 | 213 | consumer->net_seq_index, |
00e2e675 DG |
214 | 0, /* Metadata flag unset */ |
215 | stream->name, | |
ca22feea DG |
216 | pathname, |
217 | session->id); | |
00e2e675 DG |
218 | |
219 | /* Send stream and file descriptor */ | |
a7d9a3e7 | 220 | ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1); |
00e2e675 DG |
221 | if (ret < 0) { |
222 | goto error; | |
223 | } | |
224 | ||
225 | error: | |
226 | return ret; | |
227 | } | |
228 | ||
f1e16794 DG |
229 | /* |
230 | * Send all stream fds of kernel channel to the consumer. | |
231 | */ | |
f50f23d9 | 232 | int kernel_consumer_send_channel_stream(struct consumer_socket *sock, |
00e2e675 | 233 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session) |
f1e16794 | 234 | { |
00e2e675 | 235 | int ret; |
f1e16794 | 236 | struct ltt_kernel_stream *stream; |
00e2e675 DG |
237 | |
238 | /* Safety net */ | |
239 | assert(channel); | |
240 | assert(session); | |
241 | assert(session->consumer); | |
f50f23d9 | 242 | assert(sock); |
00e2e675 DG |
243 | |
244 | /* Bail out if consumer is disabled */ | |
245 | if (!session->consumer->enabled) { | |
f73fabfd | 246 | ret = LTTNG_OK; |
00e2e675 DG |
247 | goto error; |
248 | } | |
f1e16794 DG |
249 | |
250 | DBG("Sending streams of channel %s to kernel consumer", | |
251 | channel->channel->name); | |
252 | ||
00e2e675 | 253 | ret = kernel_consumer_add_channel(sock, channel); |
f1e16794 | 254 | if (ret < 0) { |
f1e16794 DG |
255 | goto error; |
256 | } | |
257 | ||
258 | /* Send streams */ | |
259 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
260 | if (!stream->fd) { | |
261 | continue; | |
262 | } | |
00e2e675 DG |
263 | |
264 | /* Add stream on the kernel consumer side. */ | |
265 | ret = kernel_consumer_add_stream(sock, channel, stream, session); | |
f1e16794 | 266 | if (ret < 0) { |
f1e16794 DG |
267 | goto error; |
268 | } | |
269 | } | |
270 | ||
f1e16794 DG |
271 | error: |
272 | return ret; | |
273 | } | |
274 | ||
275 | /* | |
276 | * Send all stream fds of the kernel session to the consumer. | |
277 | */ | |
f50f23d9 DG |
278 | int kernel_consumer_send_session(struct consumer_socket *sock, |
279 | struct ltt_kernel_session *session) | |
f1e16794 DG |
280 | { |
281 | int ret; | |
282 | struct ltt_kernel_channel *chan; | |
f1e16794 | 283 | |
00e2e675 DG |
284 | /* Safety net */ |
285 | assert(session); | |
286 | assert(session->consumer); | |
f50f23d9 | 287 | assert(sock); |
f1e16794 | 288 | |
00e2e675 DG |
289 | /* Bail out if consumer is disabled */ |
290 | if (!session->consumer->enabled) { | |
f73fabfd | 291 | ret = LTTNG_OK; |
00e2e675 | 292 | goto error; |
f1e16794 DG |
293 | } |
294 | ||
00e2e675 DG |
295 | DBG("Sending session stream to kernel consumer"); |
296 | ||
f1e16794 | 297 | if (session->metadata_stream_fd >= 0) { |
00e2e675 | 298 | ret = kernel_consumer_add_metadata(sock, session); |
f1e16794 | 299 | if (ret < 0) { |
f1e16794 DG |
300 | goto error; |
301 | } | |
302 | ||
00e2e675 DG |
303 | /* Flag that at least the metadata has been sent to the consumer. */ |
304 | session->consumer_fds_sent = 1; | |
f1e16794 DG |
305 | } |
306 | ||
00e2e675 | 307 | /* Send channel and streams of it */ |
f1e16794 | 308 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
00e2e675 | 309 | ret = kernel_consumer_send_channel_stream(sock, chan, session); |
f1e16794 DG |
310 | if (ret < 0) { |
311 | goto error; | |
312 | } | |
313 | } | |
314 | ||
00e2e675 | 315 | DBG("Kernel consumer FDs of metadata and channel streams sent"); |
f1e16794 DG |
316 | |
317 | return 0; | |
318 | ||
319 | error: | |
320 | return ret; | |
321 | } |