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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 DG |
50 | OPT_USERSPACE, |
51 | }; | |
52 | ||
cd80958d DG |
53 | static struct lttng_handle *handle; |
54 | ||
d36b8583 DG |
55 | static struct poptOption long_options[] = { |
56 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
57 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
5440dc42 | 58 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
d36b8583 | 59 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, |
d78d6610 DG |
60 | #if 0 |
61 | /* Not implemented yet */ | |
6caa2bcc | 62 | {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0}, |
d36b8583 | 63 | {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, |
d78d6610 DG |
64 | #else |
65 | {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0}, | |
66 | #endif | |
7d29a247 DG |
67 | {"discard", 0, POPT_ARG_NONE, 0, OPT_DISCARD, 0, 0}, |
68 | {"overwrite", 0, POPT_ARG_NONE, 0, OPT_OVERWRITE, 0, 0}, | |
1b579521 DG |
69 | {"subbuf-size", 0, POPT_ARG_DOUBLE, 0, OPT_SUBBUF_SIZE, 0, 0}, |
70 | {"num-subbuf", 0, POPT_ARG_INT, 0, OPT_NUM_SUBBUF, 0, 0}, | |
71 | {"switch-timer", 0, POPT_ARG_INT, 0, OPT_SWITCH_TIMER, 0, 0}, | |
72 | {"read-timer", 0, POPT_ARG_INT, 0, OPT_READ_TIMER, 0, 0}, | |
d36b8583 DG |
73 | {0, 0, 0, 0, 0, 0, 0} |
74 | }; | |
75 | ||
76 | /* | |
77 | * usage | |
78 | */ | |
79 | static void usage(FILE *ofp) | |
80 | { | |
7d29a247 | 81 | fprintf(ofp, "usage: lttng enable-channel NAME[,NAME2,...] [options] [channel_options]\n"); |
d36b8583 | 82 | fprintf(ofp, "\n"); |
7d29a247 | 83 | fprintf(ofp, " -h, --help Show this help\n"); |
5440dc42 | 84 | fprintf(ofp, " -s, --session Apply on session name\n"); |
7d29a247 | 85 | fprintf(ofp, " -k, --kernel Apply on the kernel tracer\n"); |
d78d6610 | 86 | #if 0 |
e14f64a8 DG |
87 | fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n"); |
88 | fprintf(ofp, " If no CMD, the domain used is UST global\n"); | |
89 | fprintf(ofp, " or else the domain is UST EXEC_NAME\n"); | |
90 | fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n"); | |
d78d6610 DG |
91 | #else |
92 | fprintf(ofp, " -u, --userspace Apply for the user-space tracer\n"); | |
93 | #endif | |
7d29a247 DG |
94 | fprintf(ofp, "\n"); |
95 | fprintf(ofp, "Channel options:\n"); | |
cabd9892 MD |
96 | fprintf(ofp, " --discard Discard event when buffers are full%s\n", |
97 | DEFAULT_CHANNEL_OVERWRITE ? "" : " (default)"); | |
98 | fprintf(ofp, " --overwrite Flight recorder mode%s\n", | |
99 | DEFAULT_CHANNEL_OVERWRITE ? " (default)" : ""); | |
100 | fprintf(ofp, " --subbuf-size Subbuffer size in bytes\n"); | |
101 | fprintf(ofp, " (default: %u, kernel default: %u)\n", | |
102 | DEFAULT_CHANNEL_SUBBUF_SIZE, | |
103 | DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE); | |
104 | fprintf(ofp, " --num-subbuf Number of subbufers\n"); | |
105 | fprintf(ofp, " (default: %u, kernel default: %u)\n", | |
106 | DEFAULT_CHANNEL_SUBBUF_NUM, | |
107 | DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM); | |
108 | fprintf(ofp, " --switch-timer Switch timer interval in usec (default: %u)\n", | |
109 | DEFAULT_CHANNEL_SWITCH_TIMER); | |
110 | fprintf(ofp, " --read-timer Read timer interval in usec (default: %u)\n", | |
111 | DEFAULT_CHANNEL_READ_TIMER); | |
d36b8583 DG |
112 | fprintf(ofp, "\n"); |
113 | } | |
114 | ||
5edd7e09 DG |
115 | /* |
116 | * Set default attributes depending on those already defined from the command | |
117 | * line. | |
118 | */ | |
119 | static void set_default_attr(struct lttng_domain *dom) | |
120 | { | |
121 | struct lttng_channel_attr default_attr; | |
122 | ||
123 | /* Set attributes */ | |
124 | lttng_channel_set_default_attr(dom, &default_attr); | |
125 | ||
126 | if (chan.attr.overwrite == -1) { | |
127 | chan.attr.overwrite = default_attr.overwrite; | |
128 | } | |
129 | if (chan.attr.subbuf_size == -1) { | |
130 | chan.attr.subbuf_size = default_attr.subbuf_size; | |
131 | } | |
132 | if (chan.attr.num_subbuf == -1) { | |
133 | chan.attr.num_subbuf = default_attr.num_subbuf; | |
134 | } | |
135 | if (chan.attr.switch_timer_interval == -1) { | |
136 | chan.attr.switch_timer_interval = default_attr.switch_timer_interval; | |
137 | } | |
138 | if (chan.attr.read_timer_interval == -1) { | |
139 | chan.attr.read_timer_interval = default_attr.read_timer_interval; | |
140 | } | |
141 | if (chan.attr.output == -1) { | |
142 | chan.attr.output = default_attr.output; | |
143 | } | |
144 | } | |
145 | ||
d36b8583 | 146 | /* |
0fdd1e2c | 147 | * Adding channel using the lttng API. |
d36b8583 | 148 | */ |
cd80958d | 149 | static int enable_channel(char *session_name) |
d36b8583 DG |
150 | { |
151 | int ret = CMD_SUCCESS; | |
152 | char *channel_name; | |
7d29a247 | 153 | struct lttng_domain dom; |
d36b8583 | 154 | |
d78d6610 | 155 | /* Create lttng domain */ |
7d29a247 DG |
156 | if (opt_kernel) { |
157 | dom.type = LTTNG_DOMAIN_KERNEL; | |
d78d6610 | 158 | } else if (opt_userspace) { |
f6a9efaa | 159 | dom.type = LTTNG_DOMAIN_UST; |
0fdd1e2c | 160 | } else { |
e14f64a8 | 161 | ERR("Please specify a tracer (-k/--kernel or -u/--userspace)"); |
1ab1ea0b | 162 | ret = CMD_UNDEFINED; |
0fdd1e2c | 163 | goto error; |
7d29a247 DG |
164 | } |
165 | ||
5edd7e09 DG |
166 | set_default_attr(&dom); |
167 | ||
cd80958d DG |
168 | handle = lttng_create_handle(session_name, &dom); |
169 | if (handle == NULL) { | |
170 | ret = -1; | |
171 | goto error; | |
172 | } | |
173 | ||
0fdd1e2c | 174 | /* Strip channel list (format: chan1,chan2,...) */ |
d36b8583 DG |
175 | channel_name = strtok(opt_channels, ","); |
176 | while (channel_name != NULL) { | |
0fdd1e2c DG |
177 | /* Copy channel name and normalize it */ |
178 | strncpy(chan.name, channel_name, NAME_MAX); | |
179 | chan.name[NAME_MAX - 1] = '\0'; | |
180 | ||
181 | DBG("Enabling channel %s", channel_name); | |
182 | ||
183 | ret = lttng_enable_channel(handle, &chan); | |
184 | if (ret < 0) { | |
d36b8583 DG |
185 | goto error; |
186 | } else { | |
7885e399 DG |
187 | MSG("%s channel %s enabled for session %s", |
188 | opt_kernel ? "Kernel" : "UST", channel_name, | |
189 | session_name); | |
d36b8583 DG |
190 | } |
191 | ||
192 | /* Next event */ | |
193 | channel_name = strtok(NULL, ","); | |
194 | } | |
195 | ||
196 | error: | |
cd80958d DG |
197 | lttng_destroy_handle(handle); |
198 | ||
d36b8583 DG |
199 | return ret; |
200 | } | |
201 | ||
202 | /* | |
0fdd1e2c | 203 | * Default value for channel configuration. |
7d29a247 DG |
204 | */ |
205 | static void init_channel_config(void) | |
206 | { | |
5edd7e09 DG |
207 | /* |
208 | * Put -1 everywhere so we can identify those set by the command line and | |
209 | * those needed to be set by the default values. | |
210 | */ | |
211 | memset(&chan.attr, -1, sizeof(chan.attr)); | |
7d29a247 DG |
212 | } |
213 | ||
214 | /* | |
0fdd1e2c | 215 | * Add channel to trace session |
d36b8583 DG |
216 | */ |
217 | int cmd_enable_channels(int argc, const char **argv) | |
218 | { | |
219 | int opt, ret; | |
220 | static poptContext pc; | |
cd80958d | 221 | char *session_name = NULL; |
d36b8583 | 222 | |
7d29a247 DG |
223 | init_channel_config(); |
224 | ||
d36b8583 DG |
225 | pc = poptGetContext(NULL, argc, argv, long_options, 0); |
226 | poptReadDefaultConfig(pc, 0); | |
227 | ||
228 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
229 | switch (opt) { | |
230 | case OPT_HELP: | |
231 | usage(stderr); | |
232 | ret = CMD_SUCCESS; | |
233 | goto end; | |
7d29a247 DG |
234 | case OPT_DISCARD: |
235 | chan.attr.overwrite = 0; | |
236 | DBG("Channel set to discard"); | |
237 | break; | |
238 | case OPT_OVERWRITE: | |
239 | chan.attr.overwrite = 1; | |
240 | DBG("Channel set to overwrite"); | |
241 | break; | |
242 | case OPT_SUBBUF_SIZE: | |
243 | chan.attr.subbuf_size = atol(poptGetOptArg(pc)); | |
5a0de755 | 244 | DBG("Channel subbuf size set to %" PRIu64, chan.attr.subbuf_size); |
7d29a247 DG |
245 | break; |
246 | case OPT_NUM_SUBBUF: | |
247 | chan.attr.num_subbuf = atoi(poptGetOptArg(pc)); | |
5a0de755 | 248 | DBG("Channel subbuf num set to %" PRIu64, chan.attr.num_subbuf); |
7d29a247 DG |
249 | break; |
250 | case OPT_SWITCH_TIMER: | |
251 | chan.attr.switch_timer_interval = atoi(poptGetOptArg(pc)); | |
252 | DBG("Channel switch timer interval set to %d", chan.attr.switch_timer_interval); | |
253 | break; | |
254 | case OPT_READ_TIMER: | |
255 | chan.attr.read_timer_interval = atoi(poptGetOptArg(pc)); | |
256 | DBG("Channel read timer interval set to %d", chan.attr.read_timer_interval); | |
d36b8583 | 257 | break; |
eeac7d46 MD |
258 | case OPT_USERSPACE: |
259 | opt_userspace = 1; | |
eeac7d46 | 260 | break; |
d36b8583 DG |
261 | default: |
262 | usage(stderr); | |
263 | ret = CMD_UNDEFINED; | |
264 | goto end; | |
265 | } | |
266 | } | |
267 | ||
268 | opt_channels = (char*) poptGetArg(pc); | |
269 | if (opt_channels == NULL) { | |
7d29a247 | 270 | ERR("Missing channel name.\n"); |
d36b8583 DG |
271 | usage(stderr); |
272 | ret = CMD_SUCCESS; | |
273 | goto end; | |
274 | } | |
275 | ||
cd80958d DG |
276 | if (!opt_session_name) { |
277 | session_name = get_session_name(); | |
278 | if (session_name == NULL) { | |
279 | ret = -1; | |
280 | goto end; | |
281 | } | |
282 | } else { | |
283 | session_name = opt_session_name; | |
284 | } | |
285 | ||
286 | ret = enable_channel(session_name); | |
d36b8583 DG |
287 | |
288 | end: | |
289 | return ret; | |
290 | } |