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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 DG |
36 | static int opt_pid_all; |
37 | static int opt_userspace; | |
eeac7d46 | 38 | static char *opt_cmd_name; |
e953ef25 DG |
39 | static int opt_disable_all; |
40 | static pid_t opt_pid; | |
41 | ||
42 | enum { | |
43 | OPT_HELP = 1, | |
44 | OPT_USERSPACE, | |
45 | }; | |
46 | ||
cd80958d DG |
47 | static struct lttng_handle *handle; |
48 | ||
e953ef25 DG |
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}, | |
5440dc42 | 52 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
e953ef25 DG |
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}, | |
6caa2bcc | 56 | {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0}, |
e953ef25 DG |
57 | {"all", 0, POPT_ARG_VAL, &opt_pid_all, 1, 0, 0}, |
58 | {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, | |
59 | {0, 0, 0, 0, 0, 0, 0} | |
60 | }; | |
61 | ||
62 | /* | |
63 | * usage | |
64 | */ | |
65 | static void usage(FILE *ofp) | |
66 | { | |
67 | fprintf(ofp, "usage: lttng disable-event NAME[,NAME2,...] [options]\n"); | |
68 | fprintf(ofp, "\n"); | |
69 | fprintf(ofp, " -h, --help Show this help\n"); | |
5440dc42 | 70 | fprintf(ofp, " -s, --session Apply on session name\n"); |
e953ef25 | 71 | fprintf(ofp, " -c, --channel Apply on this channel\n"); |
9730260e | 72 | fprintf(ofp, " -a, --all-events Disable all tracepoints\n"); |
e953ef25 DG |
73 | fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n"); |
74 | fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n"); | |
75 | fprintf(ofp, " --all If -u, apply on all traceable apps\n"); | |
76 | fprintf(ofp, " -p, --pid PID If -u, apply on a specific PID\n"); | |
77 | fprintf(ofp, "\n"); | |
78 | } | |
79 | ||
80 | /* | |
81 | * disable_events | |
82 | * | |
83 | * Disabling event using the lttng API. | |
84 | */ | |
cd80958d | 85 | static int disable_events(char *session_name) |
e953ef25 DG |
86 | { |
87 | int err, ret = CMD_SUCCESS; | |
b73d0b29 | 88 | char *event_name, *channel_name = NULL; |
7d29a247 | 89 | struct lttng_domain dom; |
e953ef25 | 90 | |
e953ef25 DG |
91 | if (opt_channel_name == NULL) { |
92 | err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME); | |
93 | if (err < 0) { | |
94 | ret = CMD_FATAL; | |
95 | goto error; | |
96 | } | |
97 | } else { | |
98 | channel_name = opt_channel_name; | |
99 | } | |
100 | ||
7d29a247 DG |
101 | if (opt_kernel) { |
102 | dom.type = LTTNG_DOMAIN_KERNEL; | |
9730260e DG |
103 | } else if (opt_pid != 0) { |
104 | dom.type = LTTNG_DOMAIN_UST_PID; | |
105 | dom.attr.pid = opt_pid; | |
106 | DBG("PID %d set to lttng handle", opt_pid); | |
107 | } else if (opt_userspace && opt_cmd_name == NULL) { | |
108 | dom.type = LTTNG_DOMAIN_UST; | |
109 | DBG("UST global domain selected"); | |
110 | } else if (opt_userspace && opt_cmd_name != NULL) { | |
111 | dom.type = LTTNG_DOMAIN_UST_EXEC_NAME; | |
112 | strncpy(dom.attr.exec_name, opt_cmd_name, NAME_MAX); | |
422138c8 | 113 | dom.attr.exec_name[NAME_MAX - 1] = '\0'; |
9730260e DG |
114 | } else { |
115 | ERR("Please specify a tracer (--kernel or --userspace)"); | |
116 | ret = CMD_NOT_IMPLEMENTED; | |
117 | goto error; | |
7d29a247 DG |
118 | } |
119 | ||
cd80958d DG |
120 | handle = lttng_create_handle(session_name, &dom); |
121 | if (handle == NULL) { | |
122 | ret = -1; | |
123 | goto error; | |
124 | } | |
125 | ||
e953ef25 | 126 | if (opt_disable_all) { |
9730260e DG |
127 | ret = lttng_disable_event(handle, NULL, channel_name); |
128 | if (ret < 0) { | |
e953ef25 DG |
129 | goto error; |
130 | } | |
131 | ||
9730260e DG |
132 | MSG("All %s events are disabled in channel %s", |
133 | opt_kernel ? "kernel" : "UST", channel_name); | |
134 | goto end; | |
e953ef25 DG |
135 | } |
136 | ||
137 | /* Strip event list */ | |
138 | event_name = strtok(opt_event_list, ","); | |
139 | while (event_name != NULL) { | |
140 | /* Kernel tracer action */ | |
141 | if (opt_kernel) { | |
9730260e | 142 | DBG("Disabling kernel event %s in channel %s", |
e953ef25 | 143 | event_name, channel_name); |
e953ef25 | 144 | } else if (opt_userspace) { /* User-space tracer action */ |
9730260e DG |
145 | if (!opt_pid_all) { |
146 | MSG("Only supporting tracing all UST processes (-u --all) for now."); | |
147 | ret = CMD_NOT_IMPLEMENTED; | |
148 | goto error; | |
e953ef25 | 149 | } |
9730260e DG |
150 | DBG("Disabling UST event %s in channel %s", |
151 | event_name, channel_name); | |
e953ef25 | 152 | } else { |
048e2159 | 153 | ERR("Please specify a tracer (--kernel or --userspace)"); |
e953ef25 DG |
154 | goto error; |
155 | } | |
156 | ||
9730260e DG |
157 | ret = lttng_disable_event(handle, event_name, channel_name); |
158 | if (ret < 0) { | |
159 | MSG("Unable to disable %s event %s in channel %s", | |
160 | opt_kernel ? "kernel" : "UST", event_name, | |
161 | channel_name); | |
162 | } else { | |
163 | MSG("%s event %s disabled in channel %s", | |
164 | opt_kernel ? "kernel" : "UST", event_name, | |
165 | channel_name); | |
166 | } | |
167 | ||
e953ef25 DG |
168 | /* Next event */ |
169 | event_name = strtok(NULL, ","); | |
170 | } | |
171 | ||
9730260e | 172 | end: |
e953ef25 | 173 | error: |
b73d0b29 MD |
174 | if (opt_channel_name == NULL) { |
175 | free(channel_name); | |
176 | } | |
cd80958d DG |
177 | lttng_destroy_handle(handle); |
178 | ||
e953ef25 DG |
179 | return ret; |
180 | } | |
181 | ||
182 | /* | |
183 | * cmd_disable_events | |
184 | * | |
185 | * Disable event to trace session | |
186 | */ | |
187 | int cmd_disable_events(int argc, const char **argv) | |
188 | { | |
189 | int opt, ret; | |
190 | static poptContext pc; | |
cd80958d | 191 | char *session_name = NULL; |
e953ef25 DG |
192 | |
193 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
194 | poptReadDefaultConfig(pc, 0); | |
195 | ||
196 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
197 | switch (opt) { | |
198 | case OPT_HELP: | |
199 | usage(stderr); | |
200 | ret = CMD_SUCCESS; | |
201 | goto end; | |
202 | case OPT_USERSPACE: | |
203 | opt_userspace = 1; | |
e953ef25 DG |
204 | break; |
205 | default: | |
206 | usage(stderr); | |
207 | ret = CMD_UNDEFINED; | |
208 | goto end; | |
209 | } | |
210 | } | |
211 | ||
212 | opt_event_list = (char*) poptGetArg(pc); | |
213 | if (opt_event_list == NULL && opt_disable_all == 0) { | |
214 | ERR("Missing event name(s).\n"); | |
215 | usage(stderr); | |
216 | ret = CMD_SUCCESS; | |
217 | goto end; | |
218 | } | |
219 | ||
cd80958d DG |
220 | if (!opt_session_name) { |
221 | session_name = get_session_name(); | |
222 | if (session_name == NULL) { | |
223 | ret = -1; | |
224 | goto end; | |
225 | } | |
226 | } else { | |
227 | session_name = opt_session_name; | |
228 | } | |
229 | ||
230 | ret = disable_events(session_name); | |
e953ef25 DG |
231 | |
232 | end: | |
233 | return ret; | |
234 | } |