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e953ef25 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. | |
e953ef25 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> | |
27 | ||
6e2d116c DG |
28 | #include "../cmd.h" |
29 | #include "../conf.h" | |
30 | #include "../utils.h" | |
e953ef25 DG |
31 | |
32 | static char *opt_event_list; | |
9730260e | 33 | static int opt_kernel; |
e953ef25 | 34 | static char *opt_channel_name; |
5440dc42 | 35 | static char *opt_session_name; |
e953ef25 | 36 | static int opt_userspace; |
eeac7d46 | 37 | static char *opt_cmd_name; |
e953ef25 DG |
38 | static int opt_disable_all; |
39 | static pid_t opt_pid; | |
40 | ||
41 | enum { | |
42 | OPT_HELP = 1, | |
43 | OPT_USERSPACE, | |
44 | }; | |
45 | ||
cd80958d DG |
46 | static struct lttng_handle *handle; |
47 | ||
e953ef25 DG |
48 | static struct poptOption long_options[] = { |
49 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
50 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
5440dc42 | 51 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
e953ef25 DG |
52 | {"all-events", 'a', POPT_ARG_VAL, &opt_disable_all, 1, 0, 0}, |
53 | {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0}, | |
54 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, | |
6caa2bcc | 55 | {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0}, |
e953ef25 DG |
56 | {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, |
57 | {0, 0, 0, 0, 0, 0, 0} | |
58 | }; | |
59 | ||
60 | /* | |
61 | * usage | |
62 | */ | |
63 | static void usage(FILE *ofp) | |
64 | { | |
65 | fprintf(ofp, "usage: lttng disable-event NAME[,NAME2,...] [options]\n"); | |
66 | fprintf(ofp, "\n"); | |
67 | fprintf(ofp, " -h, --help Show this help\n"); | |
5440dc42 | 68 | fprintf(ofp, " -s, --session Apply on session name\n"); |
e953ef25 | 69 | fprintf(ofp, " -c, --channel Apply on this channel\n"); |
9730260e | 70 | fprintf(ofp, " -a, --all-events Disable all tracepoints\n"); |
e953ef25 DG |
71 | fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n"); |
72 | fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n"); | |
e14f64a8 DG |
73 | fprintf(ofp, " If no CMD, the domain used is UST global\n"); |
74 | fprintf(ofp, " or else the domain is UST EXEC_NAME\n"); | |
75 | fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n"); | |
e953ef25 DG |
76 | fprintf(ofp, "\n"); |
77 | } | |
78 | ||
79 | /* | |
80 | * disable_events | |
81 | * | |
82 | * Disabling event using the lttng API. | |
83 | */ | |
cd80958d | 84 | static int disable_events(char *session_name) |
e953ef25 DG |
85 | { |
86 | int err, ret = CMD_SUCCESS; | |
b73d0b29 | 87 | char *event_name, *channel_name = NULL; |
7d29a247 | 88 | struct lttng_domain dom; |
e953ef25 | 89 | |
e953ef25 DG |
90 | if (opt_channel_name == NULL) { |
91 | err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME); | |
92 | if (err < 0) { | |
93 | ret = CMD_FATAL; | |
94 | goto error; | |
95 | } | |
96 | } else { | |
97 | channel_name = opt_channel_name; | |
98 | } | |
99 | ||
e14f64a8 DG |
100 | if (opt_kernel && opt_userspace) { |
101 | ERR("Can't use -k/--kernel and -u/--userspace together"); | |
102 | ret = CMD_FATAL; | |
103 | goto error; | |
104 | } | |
105 | ||
7d29a247 DG |
106 | if (opt_kernel) { |
107 | dom.type = LTTNG_DOMAIN_KERNEL; | |
9730260e DG |
108 | } else if (opt_pid != 0) { |
109 | dom.type = LTTNG_DOMAIN_UST_PID; | |
110 | dom.attr.pid = opt_pid; | |
111 | DBG("PID %d set to lttng handle", opt_pid); | |
112 | } else if (opt_userspace && opt_cmd_name == NULL) { | |
113 | dom.type = LTTNG_DOMAIN_UST; | |
114 | DBG("UST global domain selected"); | |
115 | } else if (opt_userspace && opt_cmd_name != NULL) { | |
116 | dom.type = LTTNG_DOMAIN_UST_EXEC_NAME; | |
117 | strncpy(dom.attr.exec_name, opt_cmd_name, NAME_MAX); | |
422138c8 | 118 | dom.attr.exec_name[NAME_MAX - 1] = '\0'; |
9730260e | 119 | } else { |
e14f64a8 | 120 | ERR("Please specify a tracer (-k/--kernel or -u/--userspace)"); |
9730260e DG |
121 | ret = CMD_NOT_IMPLEMENTED; |
122 | goto error; | |
7d29a247 DG |
123 | } |
124 | ||
cd80958d DG |
125 | handle = lttng_create_handle(session_name, &dom); |
126 | if (handle == NULL) { | |
127 | ret = -1; | |
128 | goto error; | |
129 | } | |
130 | ||
e953ef25 | 131 | if (opt_disable_all) { |
9730260e DG |
132 | ret = lttng_disable_event(handle, NULL, channel_name); |
133 | if (ret < 0) { | |
e953ef25 DG |
134 | goto error; |
135 | } | |
136 | ||
9730260e DG |
137 | MSG("All %s events are disabled in channel %s", |
138 | opt_kernel ? "kernel" : "UST", channel_name); | |
139 | goto end; | |
e953ef25 DG |
140 | } |
141 | ||
142 | /* Strip event list */ | |
143 | event_name = strtok(opt_event_list, ","); | |
144 | while (event_name != NULL) { | |
145 | /* Kernel tracer action */ | |
146 | if (opt_kernel) { | |
9730260e | 147 | DBG("Disabling kernel event %s in channel %s", |
e953ef25 | 148 | event_name, channel_name); |
e953ef25 | 149 | } else if (opt_userspace) { /* User-space tracer action */ |
e14f64a8 DG |
150 | if (opt_cmd_name != NULL || opt_pid) { |
151 | MSG("Only supporting tracing all UST processes (-u) for now."); | |
9730260e DG |
152 | ret = CMD_NOT_IMPLEMENTED; |
153 | goto error; | |
e953ef25 | 154 | } |
9730260e DG |
155 | DBG("Disabling UST event %s in channel %s", |
156 | event_name, channel_name); | |
e953ef25 | 157 | } else { |
e14f64a8 | 158 | ERR("Please specify a tracer (-k/--kernel or -u/--userspace)"); |
e953ef25 DG |
159 | goto error; |
160 | } | |
161 | ||
9730260e DG |
162 | ret = lttng_disable_event(handle, event_name, channel_name); |
163 | if (ret < 0) { | |
164 | MSG("Unable to disable %s event %s in channel %s", | |
165 | opt_kernel ? "kernel" : "UST", event_name, | |
166 | channel_name); | |
167 | } else { | |
168 | MSG("%s event %s disabled in channel %s", | |
169 | opt_kernel ? "kernel" : "UST", event_name, | |
170 | channel_name); | |
171 | } | |
172 | ||
e953ef25 DG |
173 | /* Next event */ |
174 | event_name = strtok(NULL, ","); | |
175 | } | |
176 | ||
9730260e | 177 | end: |
e953ef25 | 178 | error: |
b73d0b29 MD |
179 | if (opt_channel_name == NULL) { |
180 | free(channel_name); | |
181 | } | |
cd80958d DG |
182 | lttng_destroy_handle(handle); |
183 | ||
e953ef25 DG |
184 | return ret; |
185 | } | |
186 | ||
187 | /* | |
188 | * cmd_disable_events | |
189 | * | |
190 | * Disable event to trace session | |
191 | */ | |
192 | int cmd_disable_events(int argc, const char **argv) | |
193 | { | |
194 | int opt, ret; | |
195 | static poptContext pc; | |
cd80958d | 196 | char *session_name = NULL; |
e953ef25 DG |
197 | |
198 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
199 | poptReadDefaultConfig(pc, 0); | |
200 | ||
201 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
202 | switch (opt) { | |
203 | case OPT_HELP: | |
204 | usage(stderr); | |
205 | ret = CMD_SUCCESS; | |
206 | goto end; | |
207 | case OPT_USERSPACE: | |
208 | opt_userspace = 1; | |
e953ef25 DG |
209 | break; |
210 | default: | |
211 | usage(stderr); | |
212 | ret = CMD_UNDEFINED; | |
213 | goto end; | |
214 | } | |
215 | } | |
216 | ||
217 | opt_event_list = (char*) poptGetArg(pc); | |
218 | if (opt_event_list == NULL && opt_disable_all == 0) { | |
219 | ERR("Missing event name(s).\n"); | |
220 | usage(stderr); | |
221 | ret = CMD_SUCCESS; | |
222 | goto end; | |
223 | } | |
224 | ||
cd80958d DG |
225 | if (!opt_session_name) { |
226 | session_name = get_session_name(); | |
227 | if (session_name == NULL) { | |
228 | ret = -1; | |
229 | goto end; | |
230 | } | |
231 | } else { | |
232 | session_name = opt_session_name; | |
233 | } | |
234 | ||
235 | ret = disable_events(session_name); | |
e953ef25 DG |
236 | |
237 | end: | |
238 | return ret; | |
239 | } |