Commit | Line | Data |
---|---|---|
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 | */ | |
34 | int kernel_consumer_add_channel(int sock, struct ltt_kernel_channel *channel) | |
35 | { | |
36 | int ret; | |
37 | struct lttcomm_consumer_msg lkm; | |
38 | ||
39 | /* Safety net */ | |
40 | assert(channel); | |
41 | ||
42 | DBG("Kernel consumer adding channel %s to kernel consumer", | |
43 | channel->channel->name); | |
44 | ||
45 | /* Prep channel message structure */ | |
46 | consumer_init_channel_comm_msg(&lkm, | |
47 | LTTNG_CONSUMER_ADD_CHANNEL, | |
48 | channel->fd, | |
49 | channel->channel->attr.subbuf_size, | |
50 | 0, /* Kernel */ | |
51 | channel->channel->name); | |
52 | ||
53 | ret = consumer_send_channel(sock, &lkm); | |
54 | if (ret < 0) { | |
55 | goto error; | |
56 | } | |
57 | ||
58 | error: | |
59 | return ret; | |
60 | } | |
61 | ||
62 | /* | |
63 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. | |
64 | */ | |
65 | int kernel_consumer_add_metadata(int sock, struct ltt_kernel_session *session) | |
66 | { | |
67 | int ret; | |
68 | const char *pathname; | |
69 | struct lttcomm_consumer_msg lkm; | |
70 | struct consumer_output *output; | |
71 | ||
72 | /* Safety net */ | |
73 | assert(session); | |
74 | assert(session->consumer); | |
75 | ||
76 | DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd); | |
77 | ||
78 | /* Get consumer output pointer */ | |
79 | output = session->consumer; | |
80 | ||
81 | /* Get correct path name destination */ | |
82 | if (output->type == CONSUMER_DST_LOCAL) { | |
83 | pathname = output->dst.trace_path; | |
84 | } else { | |
85 | pathname = output->subdir; | |
86 | } | |
87 | ||
88 | /* Prep channel message structure */ | |
89 | consumer_init_channel_comm_msg(&lkm, | |
90 | LTTNG_CONSUMER_ADD_CHANNEL, | |
91 | session->metadata->fd, | |
92 | session->metadata->conf->attr.subbuf_size, | |
93 | 0, /* for kernel */ | |
94 | "metadata"); | |
95 | ||
96 | ret = consumer_send_channel(sock, &lkm); | |
97 | if (ret < 0) { | |
98 | goto error; | |
99 | } | |
100 | ||
101 | /* Prep stream message structure */ | |
102 | consumer_init_stream_comm_msg(&lkm, | |
103 | LTTNG_CONSUMER_ADD_STREAM, | |
104 | session->metadata->fd, | |
105 | session->metadata_stream_fd, | |
106 | LTTNG_CONSUMER_ACTIVE_STREAM, | |
107 | DEFAULT_KERNEL_CHANNEL_OUTPUT, | |
108 | 0, /* Kernel */ | |
109 | session->uid, | |
110 | session->gid, | |
111 | output->net_seq_index, | |
112 | 1, /* Metadata flag set */ | |
113 | "metadata", | |
114 | pathname); | |
115 | ||
116 | /* Send stream and file descriptor */ | |
117 | ret = consumer_send_stream(sock, output, &lkm, | |
118 | &session->metadata_stream_fd, 1); | |
119 | if (ret < 0) { | |
120 | goto error; | |
121 | } | |
122 | ||
123 | error: | |
124 | return ret; | |
125 | } | |
126 | ||
127 | /* | |
128 | * Sending a single stream to the consumer with command ADD_STREAM. | |
129 | */ | |
130 | int kernel_consumer_add_stream(int sock, struct ltt_kernel_channel *channel, | |
131 | struct ltt_kernel_stream *stream, struct ltt_kernel_session *session) | |
132 | { | |
133 | int ret; | |
134 | const char *pathname; | |
135 | struct lttcomm_consumer_msg lkm; | |
136 | struct consumer_output *output; | |
137 | ||
138 | assert(channel); | |
139 | assert(stream); | |
140 | assert(session); | |
141 | assert(session->consumer); | |
142 | ||
143 | DBG("Sending stream %d of channel %s to kernel consumer", | |
144 | stream->fd, channel->channel->name); | |
145 | ||
146 | /* Get consumer output pointer */ | |
147 | output = session->consumer; | |
148 | ||
149 | /* Get correct path name destination */ | |
150 | if (output->type == CONSUMER_DST_LOCAL) { | |
151 | pathname = output->dst.trace_path; | |
152 | DBG3("Consumer is local to %s", pathname); | |
153 | } else { | |
154 | pathname = output->subdir; | |
155 | DBG3("Consumer is network to subdir %s", pathname); | |
156 | } | |
157 | ||
158 | /* Prep stream consumer message */ | |
159 | consumer_init_stream_comm_msg(&lkm, LTTNG_CONSUMER_ADD_STREAM, | |
160 | channel->fd, | |
161 | stream->fd, | |
162 | stream->state, | |
163 | channel->channel->attr.output, | |
164 | 0, /* Kernel */ | |
165 | session->uid, | |
166 | session->gid, | |
167 | output->net_seq_index, | |
168 | 0, /* Metadata flag unset */ | |
169 | stream->name, | |
170 | pathname); | |
171 | ||
172 | /* Send stream and file descriptor */ | |
173 | ret = consumer_send_stream(sock, output, &lkm, &stream->fd, 1); | |
174 | if (ret < 0) { | |
175 | goto error; | |
176 | } | |
177 | ||
178 | error: | |
179 | return ret; | |
180 | } | |
181 | ||
f1e16794 DG |
182 | /* |
183 | * Send all stream fds of kernel channel to the consumer. | |
184 | */ | |
00e2e675 DG |
185 | int kernel_consumer_send_channel_stream(int sock, |
186 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session) | |
f1e16794 | 187 | { |
00e2e675 | 188 | int ret; |
f1e16794 | 189 | struct ltt_kernel_stream *stream; |
00e2e675 DG |
190 | |
191 | /* Safety net */ | |
192 | assert(channel); | |
193 | assert(session); | |
194 | assert(session->consumer); | |
195 | ||
196 | /* Bail out if consumer is disabled */ | |
197 | if (!session->consumer->enabled) { | |
198 | ret = LTTCOMM_OK; | |
199 | goto error; | |
200 | } | |
f1e16794 DG |
201 | |
202 | DBG("Sending streams of channel %s to kernel consumer", | |
203 | channel->channel->name); | |
204 | ||
00e2e675 | 205 | ret = kernel_consumer_add_channel(sock, channel); |
f1e16794 | 206 | if (ret < 0) { |
f1e16794 DG |
207 | goto error; |
208 | } | |
209 | ||
210 | /* Send streams */ | |
211 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
212 | if (!stream->fd) { | |
213 | continue; | |
214 | } | |
00e2e675 DG |
215 | |
216 | /* Add stream on the kernel consumer side. */ | |
217 | ret = kernel_consumer_add_stream(sock, channel, stream, session); | |
f1e16794 | 218 | if (ret < 0) { |
f1e16794 DG |
219 | goto error; |
220 | } | |
221 | } | |
222 | ||
f1e16794 DG |
223 | error: |
224 | return ret; | |
225 | } | |
226 | ||
227 | /* | |
228 | * Send all stream fds of the kernel session to the consumer. | |
229 | */ | |
00e2e675 | 230 | int kernel_consumer_send_session(int sock, struct ltt_kernel_session *session) |
f1e16794 DG |
231 | { |
232 | int ret; | |
233 | struct ltt_kernel_channel *chan; | |
f1e16794 | 234 | |
00e2e675 DG |
235 | /* Safety net */ |
236 | assert(session); | |
237 | assert(session->consumer); | |
f1e16794 | 238 | |
00e2e675 DG |
239 | /* Bail out if consumer is disabled */ |
240 | if (!session->consumer->enabled) { | |
241 | ret = LTTCOMM_OK; | |
242 | goto error; | |
f1e16794 DG |
243 | } |
244 | ||
00e2e675 DG |
245 | DBG("Sending session stream to kernel consumer"); |
246 | ||
f1e16794 | 247 | if (session->metadata_stream_fd >= 0) { |
00e2e675 | 248 | ret = kernel_consumer_add_metadata(sock, session); |
f1e16794 | 249 | if (ret < 0) { |
f1e16794 DG |
250 | goto error; |
251 | } | |
252 | ||
00e2e675 DG |
253 | /* Flag that at least the metadata has been sent to the consumer. */ |
254 | session->consumer_fds_sent = 1; | |
f1e16794 DG |
255 | } |
256 | ||
00e2e675 | 257 | /* Send channel and streams of it */ |
f1e16794 | 258 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
00e2e675 | 259 | ret = kernel_consumer_send_channel_stream(sock, chan, session); |
f1e16794 DG |
260 | if (ret < 0) { |
261 | goto error; | |
262 | } | |
263 | } | |
264 | ||
00e2e675 | 265 | DBG("Kernel consumer FDs of metadata and channel streams sent"); |
f1e16794 DG |
266 | |
267 | return 0; | |
268 | ||
269 | error: | |
270 | return ret; | |
271 | } | |
272 | ||
00e2e675 DG |
273 | /* |
274 | * Send relayd socket to consumer associated with a session name. | |
275 | * | |
276 | * On success return positive value. On error, negative value. | |
277 | */ | |
278 | int kernel_consumer_send_relayd_socket(int consumer_sock, | |
279 | struct lttcomm_sock *sock, struct consumer_output *consumer, | |
280 | enum lttng_stream_type type) | |
281 | { | |
282 | int ret; | |
283 | struct lttcomm_consumer_msg msg; | |
284 | ||
285 | /* Code flow error. Safety net. */ | |
286 | assert(sock); | |
287 | assert(consumer); | |
288 | ||
289 | /* Bail out if consumer is disabled */ | |
290 | if (!consumer->enabled) { | |
291 | ret = LTTCOMM_OK; | |
292 | goto error; | |
293 | } | |
294 | ||
295 | msg.cmd_type = LTTNG_CONSUMER_ADD_RELAYD_SOCKET; | |
296 | /* | |
297 | * Assign network consumer output index using the temporary consumer since | |
298 | * this call should only be made from within a set_consumer_uri() function | |
299 | * call in the session daemon. | |
300 | */ | |
301 | msg.u.relayd_sock.net_index = consumer->net_seq_index; | |
302 | msg.u.relayd_sock.type = type; | |
303 | memcpy(&msg.u.relayd_sock.sock, sock, sizeof(msg.u.relayd_sock.sock)); | |
304 | ||
305 | DBG2("Sending relayd sock info to consumer"); | |
306 | ret = lttcomm_send_unix_sock(consumer_sock, &msg, sizeof(msg)); | |
307 | if (ret < 0) { | |
308 | PERROR("send consumer relayd socket info"); | |
309 | goto error; | |
310 | } | |
311 | ||
312 | DBG2("Sending relayd socket file descriptor to consumer"); | |
313 | ret = consumer_send_fds(consumer_sock, &sock->fd, 1); | |
314 | if (ret < 0) { | |
315 | goto error; | |
316 | } | |
317 | ||
318 | DBG("Kernel consumer relayd socket sent"); | |
319 | ||
320 | error: | |
321 | return ret; | |
322 | } |