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