Disable lttng ust domain not implemented
[lttng-tools.git] / src / bin / lttng / commands / disable_events.c
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
6 * as published by the Free Software Foundation; only version 2
7 * of the License.
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>
27
28 #include "../command.h"
29
30 static char *opt_event_list;
31 static int opt_kernel;
32 static char *opt_channel_name;
33 static char *opt_session_name;
34 static int opt_userspace;
35 static int opt_disable_all;
36 #if 0
37 /* Not implemented yet */
38 static char *opt_cmd_name;
39 static pid_t opt_pid;
40 #endif
41
42 enum {
43 OPT_HELP = 1,
44 OPT_USERSPACE,
45 };
46
47 static struct lttng_handle *handle;
48
49 static struct poptOption long_options[] = {
50 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
51 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
52 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
53 {"all-events", 'a', POPT_ARG_VAL, &opt_disable_all, 1, 0, 0},
54 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
55 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
56 #if 0
57 /* Not implemented yet */
58 {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
59 {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
60 #else
61 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
62 #endif
63 {0, 0, 0, 0, 0, 0, 0}
64 };
65
66 /*
67 * usage
68 */
69 static void usage(FILE *ofp)
70 {
71 fprintf(ofp, "usage: lttng disable-event NAME[,NAME2,...] [options]\n");
72 fprintf(ofp, "\n");
73 fprintf(ofp, " -h, --help Show this help\n");
74 fprintf(ofp, " -s, --session Apply on session name\n");
75 fprintf(ofp, " -c, --channel Apply on this channel\n");
76 fprintf(ofp, " -a, --all-events Disable all tracepoints\n");
77 fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
78 #if 0
79 fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n");
80 fprintf(ofp, " If no CMD, the domain used is UST global\n");
81 fprintf(ofp, " or else the domain is UST EXEC_NAME\n");
82 fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n");
83 #else
84 fprintf(ofp, " -u, --userspace Apply for the user-space tracer\n");
85 #endif
86 fprintf(ofp, "\n");
87 }
88
89 /*
90 * disable_events
91 *
92 * Disabling event using the lttng API.
93 */
94 static int disable_events(char *session_name)
95 {
96 int err, ret = CMD_SUCCESS;
97 char *event_name, *channel_name = NULL;
98 struct lttng_domain dom;
99
100 if (opt_channel_name == NULL) {
101 err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
102 if (err < 0) {
103 ret = CMD_FATAL;
104 goto error;
105 }
106 } else {
107 channel_name = opt_channel_name;
108 }
109
110 if (opt_kernel && opt_userspace) {
111 ERR("Can't use -k/--kernel and -u/--userspace together");
112 ret = CMD_FATAL;
113 goto error;
114 }
115
116 /* Create lttng domain */
117 if (opt_kernel) {
118 dom.type = LTTNG_DOMAIN_KERNEL;
119 } else if (opt_userspace) {
120 dom.type = LTTNG_DOMAIN_UST;
121 } else {
122 ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
123 ret = CMD_NOT_IMPLEMENTED;
124 goto error;
125 }
126
127 handle = lttng_create_handle(session_name, &dom);
128 if (handle == NULL) {
129 ret = -1;
130 goto error;
131 }
132
133 if (opt_disable_all) {
134 ret = lttng_disable_event(handle, NULL, channel_name);
135 if (ret < 0) {
136 goto error;
137 }
138
139 MSG("All %s events are disabled in channel %s",
140 opt_kernel ? "kernel" : "UST", channel_name);
141 goto end;
142 }
143
144 /* Strip event list */
145 event_name = strtok(opt_event_list, ",");
146 while (event_name != NULL) {
147 /* Kernel tracer action */
148 if (opt_kernel) {
149 DBG("Disabling kernel event %s in channel %s",
150 event_name, channel_name);
151 } else if (opt_userspace) { /* User-space tracer action */
152 #if 0
153 if (opt_cmd_name != NULL || opt_pid) {
154 MSG("Only supporting tracing all UST processes (-u) for now.");
155 ret = CMD_NOT_IMPLEMENTED;
156 goto error;
157 }
158 #endif
159 DBG("Disabling UST event %s in channel %s",
160 event_name, channel_name);
161 } else {
162 ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
163 goto error;
164 }
165
166 ret = lttng_disable_event(handle, event_name, channel_name);
167 if (ret < 0) {
168 MSG("Unable to disable %s event %s in channel %s",
169 opt_kernel ? "kernel" : "UST", event_name,
170 channel_name);
171 } else {
172 MSG("%s event %s disabled in channel %s",
173 opt_kernel ? "kernel" : "UST", event_name,
174 channel_name);
175 }
176
177 /* Next event */
178 event_name = strtok(NULL, ",");
179 }
180
181 end:
182 error:
183 if (opt_channel_name == NULL) {
184 free(channel_name);
185 }
186 lttng_destroy_handle(handle);
187
188 return ret;
189 }
190
191 /*
192 * cmd_disable_events
193 *
194 * Disable event to trace session
195 */
196 int cmd_disable_events(int argc, const char **argv)
197 {
198 int opt, ret;
199 static poptContext pc;
200 char *session_name = NULL;
201
202 pc = poptGetContext(NULL, argc, argv, long_options, 0);
203 poptReadDefaultConfig(pc, 0);
204
205 while ((opt = poptGetNextOpt(pc)) != -1) {
206 switch (opt) {
207 case OPT_HELP:
208 usage(stderr);
209 ret = CMD_SUCCESS;
210 goto end;
211 case OPT_USERSPACE:
212 opt_userspace = 1;
213 break;
214 default:
215 usage(stderr);
216 ret = CMD_UNDEFINED;
217 goto end;
218 }
219 }
220
221 opt_event_list = (char*) poptGetArg(pc);
222 if (opt_event_list == NULL && opt_disable_all == 0) {
223 ERR("Missing event name(s).\n");
224 usage(stderr);
225 ret = CMD_SUCCESS;
226 goto end;
227 }
228
229 if (!opt_session_name) {
230 session_name = get_session_name();
231 if (session_name == NULL) {
232 ret = -1;
233 goto end;
234 }
235 } else {
236 session_name = opt_session_name;
237 }
238
239 ret = disable_events(session_name);
240
241 end:
242 return ret;
243 }
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