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d36b8583 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
6 | * as published by the Free Software Foundation; only version 2 |
7 | * of the License. | |
d36b8583 DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <popt.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <sys/stat.h> | |
25 | #include <sys/types.h> | |
26 | #include <unistd.h> | |
5a0de755 | 27 | #include <inttypes.h> |
d36b8583 | 28 | |
c399183f | 29 | #include "../command.h" |
d36b8583 DG |
30 | |
31 | static char *opt_channels; | |
5edd7e09 | 32 | static int opt_kernel; |
5440dc42 | 33 | static char *opt_session_name; |
d36b8583 | 34 | static int opt_userspace; |
d78d6610 DG |
35 | static struct lttng_channel chan; |
36 | #if 0 | |
37 | /* Not implemented yet */ | |
eeac7d46 | 38 | static char *opt_cmd_name; |
d36b8583 | 39 | static pid_t opt_pid; |
d78d6610 | 40 | #endif |
d36b8583 DG |
41 | |
42 | enum { | |
43 | OPT_HELP = 1, | |
7d29a247 DG |
44 | OPT_DISCARD, |
45 | OPT_OVERWRITE, | |
46 | OPT_SUBBUF_SIZE, | |
47 | OPT_NUM_SUBBUF, | |
48 | OPT_SWITCH_TIMER, | |
49 | OPT_READ_TIMER, | |
d36b8583 | 50 | OPT_USERSPACE, |
679b4943 | 51 | OPT_LIST_OPTIONS, |
d36b8583 DG |
52 | }; |
53 | ||
cd80958d DG |
54 | static struct lttng_handle *handle; |
55 | ||
d36b8583 DG |
56 | static struct poptOption long_options[] = { |
57 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
58 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
5440dc42 | 59 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
d36b8583 | 60 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, |
d78d6610 DG |
61 | #if 0 |
62 | /* Not implemented yet */ | |
6caa2bcc | 63 | {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0}, |
d36b8583 | 64 | {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, |
d78d6610 DG |
65 | #else |
66 | {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0}, | |
67 | #endif | |
7d29a247 DG |
68 | {"discard", 0, POPT_ARG_NONE, 0, OPT_DISCARD, 0, 0}, |
69 | {"overwrite", 0, POPT_ARG_NONE, 0, OPT_OVERWRITE, 0, 0}, | |
1b579521 DG |
70 | {"subbuf-size", 0, POPT_ARG_DOUBLE, 0, OPT_SUBBUF_SIZE, 0, 0}, |
71 | {"num-subbuf", 0, POPT_ARG_INT, 0, OPT_NUM_SUBBUF, 0, 0}, | |
72 | {"switch-timer", 0, POPT_ARG_INT, 0, OPT_SWITCH_TIMER, 0, 0}, | |
73 | {"read-timer", 0, POPT_ARG_INT, 0, OPT_READ_TIMER, 0, 0}, | |
679b4943 | 74 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
d36b8583 DG |
75 | {0, 0, 0, 0, 0, 0, 0} |
76 | }; | |
77 | ||
78 | /* | |
79 | * usage | |
80 | */ | |
81 | static void usage(FILE *ofp) | |
82 | { | |
7d29a247 | 83 | fprintf(ofp, "usage: lttng enable-channel NAME[,NAME2,...] [options] [channel_options]\n"); |
d36b8583 | 84 | fprintf(ofp, "\n"); |
7d29a247 | 85 | fprintf(ofp, " -h, --help Show this help\n"); |
679b4943 | 86 | fprintf(ofp, " --list-options Simple listing of options\n"); |
5440dc42 | 87 | fprintf(ofp, " -s, --session Apply on session name\n"); |
7d29a247 | 88 | fprintf(ofp, " -k, --kernel Apply on the kernel tracer\n"); |
d78d6610 | 89 | #if 0 |
e14f64a8 DG |
90 | fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n"); |
91 | fprintf(ofp, " If no CMD, the domain used is UST global\n"); | |
92 | fprintf(ofp, " or else the domain is UST EXEC_NAME\n"); | |
93 | fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n"); | |
d78d6610 DG |
94 | #else |
95 | fprintf(ofp, " -u, --userspace Apply for the user-space tracer\n"); | |
96 | #endif | |
7d29a247 DG |
97 | fprintf(ofp, "\n"); |
98 | fprintf(ofp, "Channel options:\n"); | |
cabd9892 MD |
99 | fprintf(ofp, " --discard Discard event when buffers are full%s\n", |
100 | DEFAULT_CHANNEL_OVERWRITE ? "" : " (default)"); | |
101 | fprintf(ofp, " --overwrite Flight recorder mode%s\n", | |
102 | DEFAULT_CHANNEL_OVERWRITE ? " (default)" : ""); | |
103 | fprintf(ofp, " --subbuf-size Subbuffer size in bytes\n"); | |
104 | fprintf(ofp, " (default: %u, kernel default: %u)\n", | |
105 | DEFAULT_CHANNEL_SUBBUF_SIZE, | |
106 | DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE); | |
107 | fprintf(ofp, " --num-subbuf Number of subbufers\n"); | |
108 | fprintf(ofp, " (default: %u, kernel default: %u)\n", | |
109 | DEFAULT_CHANNEL_SUBBUF_NUM, | |
110 | DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM); | |
111 | fprintf(ofp, " --switch-timer Switch timer interval in usec (default: %u)\n", | |
112 | DEFAULT_CHANNEL_SWITCH_TIMER); | |
113 | fprintf(ofp, " --read-timer Read timer interval in usec (default: %u)\n", | |
114 | DEFAULT_CHANNEL_READ_TIMER); | |
d36b8583 DG |
115 | fprintf(ofp, "\n"); |
116 | } | |
117 | ||
5edd7e09 DG |
118 | /* |
119 | * Set default attributes depending on those already defined from the command | |
120 | * line. | |
121 | */ | |
122 | static void set_default_attr(struct lttng_domain *dom) | |
123 | { | |
124 | struct lttng_channel_attr default_attr; | |
125 | ||
126 | /* Set attributes */ | |
127 | lttng_channel_set_default_attr(dom, &default_attr); | |
128 | ||
129 | if (chan.attr.overwrite == -1) { | |
130 | chan.attr.overwrite = default_attr.overwrite; | |
131 | } | |
132 | if (chan.attr.subbuf_size == -1) { | |
133 | chan.attr.subbuf_size = default_attr.subbuf_size; | |
134 | } | |
135 | if (chan.attr.num_subbuf == -1) { | |
136 | chan.attr.num_subbuf = default_attr.num_subbuf; | |
137 | } | |
138 | if (chan.attr.switch_timer_interval == -1) { | |
139 | chan.attr.switch_timer_interval = default_attr.switch_timer_interval; | |
140 | } | |
141 | if (chan.attr.read_timer_interval == -1) { | |
142 | chan.attr.read_timer_interval = default_attr.read_timer_interval; | |
143 | } | |
144 | if (chan.attr.output == -1) { | |
145 | chan.attr.output = default_attr.output; | |
146 | } | |
147 | } | |
148 | ||
d36b8583 | 149 | /* |
0fdd1e2c | 150 | * Adding channel using the lttng API. |
d36b8583 | 151 | */ |
cd80958d | 152 | static int enable_channel(char *session_name) |
d36b8583 DG |
153 | { |
154 | int ret = CMD_SUCCESS; | |
155 | char *channel_name; | |
7d29a247 | 156 | struct lttng_domain dom; |
d36b8583 | 157 | |
d78d6610 | 158 | /* Create lttng domain */ |
7d29a247 DG |
159 | if (opt_kernel) { |
160 | dom.type = LTTNG_DOMAIN_KERNEL; | |
d78d6610 | 161 | } else if (opt_userspace) { |
f6a9efaa | 162 | dom.type = LTTNG_DOMAIN_UST; |
0fdd1e2c | 163 | } else { |
e14f64a8 | 164 | ERR("Please specify a tracer (-k/--kernel or -u/--userspace)"); |
d16c1a4c | 165 | ret = CMD_ERROR; |
0fdd1e2c | 166 | goto error; |
7d29a247 DG |
167 | } |
168 | ||
5edd7e09 DG |
169 | set_default_attr(&dom); |
170 | ||
cd80958d DG |
171 | handle = lttng_create_handle(session_name, &dom); |
172 | if (handle == NULL) { | |
173 | ret = -1; | |
174 | goto error; | |
175 | } | |
176 | ||
0fdd1e2c | 177 | /* Strip channel list (format: chan1,chan2,...) */ |
d36b8583 DG |
178 | channel_name = strtok(opt_channels, ","); |
179 | while (channel_name != NULL) { | |
0fdd1e2c DG |
180 | /* Copy channel name and normalize it */ |
181 | strncpy(chan.name, channel_name, NAME_MAX); | |
182 | chan.name[NAME_MAX - 1] = '\0'; | |
183 | ||
184 | DBG("Enabling channel %s", channel_name); | |
185 | ||
186 | ret = lttng_enable_channel(handle, &chan); | |
187 | if (ret < 0) { | |
d36b8583 DG |
188 | goto error; |
189 | } else { | |
7885e399 DG |
190 | MSG("%s channel %s enabled for session %s", |
191 | opt_kernel ? "Kernel" : "UST", channel_name, | |
192 | session_name); | |
d36b8583 DG |
193 | } |
194 | ||
195 | /* Next event */ | |
196 | channel_name = strtok(NULL, ","); | |
197 | } | |
198 | ||
199 | error: | |
cd80958d DG |
200 | lttng_destroy_handle(handle); |
201 | ||
d36b8583 DG |
202 | return ret; |
203 | } | |
204 | ||
205 | /* | |
0fdd1e2c | 206 | * Default value for channel configuration. |
7d29a247 DG |
207 | */ |
208 | static void init_channel_config(void) | |
209 | { | |
5edd7e09 DG |
210 | /* |
211 | * Put -1 everywhere so we can identify those set by the command line and | |
212 | * those needed to be set by the default values. | |
213 | */ | |
214 | memset(&chan.attr, -1, sizeof(chan.attr)); | |
7d29a247 DG |
215 | } |
216 | ||
217 | /* | |
0fdd1e2c | 218 | * Add channel to trace session |
d36b8583 DG |
219 | */ |
220 | int cmd_enable_channels(int argc, const char **argv) | |
221 | { | |
222 | int opt, ret; | |
223 | static poptContext pc; | |
cd80958d | 224 | char *session_name = NULL; |
d36b8583 | 225 | |
7d29a247 DG |
226 | init_channel_config(); |
227 | ||
d36b8583 DG |
228 | pc = poptGetContext(NULL, argc, argv, long_options, 0); |
229 | poptReadDefaultConfig(pc, 0); | |
230 | ||
231 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
232 | switch (opt) { | |
233 | case OPT_HELP: | |
234 | usage(stderr); | |
235 | ret = CMD_SUCCESS; | |
236 | goto end; | |
7d29a247 DG |
237 | case OPT_DISCARD: |
238 | chan.attr.overwrite = 0; | |
239 | DBG("Channel set to discard"); | |
240 | break; | |
241 | case OPT_OVERWRITE: | |
242 | chan.attr.overwrite = 1; | |
243 | DBG("Channel set to overwrite"); | |
244 | break; | |
245 | case OPT_SUBBUF_SIZE: | |
246 | chan.attr.subbuf_size = atol(poptGetOptArg(pc)); | |
5a0de755 | 247 | DBG("Channel subbuf size set to %" PRIu64, chan.attr.subbuf_size); |
7d29a247 DG |
248 | break; |
249 | case OPT_NUM_SUBBUF: | |
250 | chan.attr.num_subbuf = atoi(poptGetOptArg(pc)); | |
5a0de755 | 251 | DBG("Channel subbuf num set to %" PRIu64, chan.attr.num_subbuf); |
7d29a247 DG |
252 | break; |
253 | case OPT_SWITCH_TIMER: | |
254 | chan.attr.switch_timer_interval = atoi(poptGetOptArg(pc)); | |
255 | DBG("Channel switch timer interval set to %d", chan.attr.switch_timer_interval); | |
256 | break; | |
257 | case OPT_READ_TIMER: | |
258 | chan.attr.read_timer_interval = atoi(poptGetOptArg(pc)); | |
259 | DBG("Channel read timer interval set to %d", chan.attr.read_timer_interval); | |
d36b8583 | 260 | break; |
eeac7d46 MD |
261 | case OPT_USERSPACE: |
262 | opt_userspace = 1; | |
eeac7d46 | 263 | break; |
679b4943 SM |
264 | case OPT_LIST_OPTIONS: |
265 | list_cmd_options(stdout, long_options); | |
266 | ret = CMD_SUCCESS; | |
267 | goto end; | |
d36b8583 DG |
268 | default: |
269 | usage(stderr); | |
270 | ret = CMD_UNDEFINED; | |
271 | goto end; | |
272 | } | |
273 | } | |
274 | ||
275 | opt_channels = (char*) poptGetArg(pc); | |
276 | if (opt_channels == NULL) { | |
7d29a247 | 277 | ERR("Missing channel name.\n"); |
d36b8583 DG |
278 | usage(stderr); |
279 | ret = CMD_SUCCESS; | |
280 | goto end; | |
281 | } | |
282 | ||
cd80958d DG |
283 | if (!opt_session_name) { |
284 | session_name = get_session_name(); | |
285 | if (session_name == NULL) { | |
286 | ret = -1; | |
287 | goto end; | |
288 | } | |
289 | } else { | |
290 | session_name = opt_session_name; | |
291 | } | |
292 | ||
293 | ret = enable_channel(session_name); | |
d36b8583 DG |
294 | |
295 | end: | |
296 | return ret; | |
297 | } |