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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; | |
33 | static char *opt_kernel; | |
34 | static char *opt_cmd_name; | |
35 | static char *opt_channel_name; | |
5440dc42 | 36 | static char *opt_session_name; |
e953ef25 DG |
37 | static int opt_pid_all; |
38 | static int opt_userspace; | |
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}, | |
56 | {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, 0, OPT_USERSPACE, 0, 0}, | |
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 DG |
71 | fprintf(ofp, " -c, --channel Apply on this channel\n"); |
72 | fprintf(ofp, " -a, --all-events Enable all tracepoints\n"); | |
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; |
e953ef25 | 89 | struct lttng_event ev; |
7d29a247 | 90 | struct lttng_domain dom; |
e953ef25 | 91 | |
e953ef25 DG |
92 | if (opt_channel_name == NULL) { |
93 | err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME); | |
94 | if (err < 0) { | |
95 | ret = CMD_FATAL; | |
96 | goto error; | |
97 | } | |
98 | } else { | |
99 | channel_name = opt_channel_name; | |
100 | } | |
101 | ||
7d29a247 DG |
102 | if (opt_kernel) { |
103 | dom.type = LTTNG_DOMAIN_KERNEL; | |
104 | } | |
105 | ||
cd80958d DG |
106 | handle = lttng_create_handle(session_name, &dom); |
107 | if (handle == NULL) { | |
108 | ret = -1; | |
109 | goto error; | |
110 | } | |
111 | ||
e953ef25 DG |
112 | if (opt_disable_all) { |
113 | if (opt_kernel) { | |
cd80958d | 114 | ret = lttng_disable_event(handle, NULL, channel_name); |
e953ef25 DG |
115 | goto error; |
116 | } | |
117 | ||
118 | /* TODO: User-space tracer */ | |
119 | } | |
120 | ||
121 | /* Strip event list */ | |
122 | event_name = strtok(opt_event_list, ","); | |
123 | while (event_name != NULL) { | |
124 | /* Kernel tracer action */ | |
125 | if (opt_kernel) { | |
126 | DBG("Disabling kernel event %s for channel %s", | |
127 | event_name, channel_name); | |
128 | ||
129 | /* Copy name and type of the event */ | |
130 | strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN); | |
99497cd0 | 131 | ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
cd80958d | 132 | ret = lttng_disable_event(handle, event_name, channel_name); |
e953ef25 DG |
133 | if (ret < 0) { |
134 | MSG("Unable to disable event %s for channel %s", | |
135 | event_name, channel_name); | |
136 | } else { | |
137 | MSG("Kernel event %s disabled for channel %s", | |
138 | event_name, channel_name); | |
139 | } | |
140 | } else if (opt_userspace) { /* User-space tracer action */ | |
141 | /* | |
142 | * TODO: Waiting on lttng UST 2.0 | |
143 | */ | |
144 | if (opt_pid_all) { | |
145 | } else if (opt_pid != 0) { | |
146 | } | |
147 | ret = CMD_NOT_IMPLEMENTED; | |
148 | goto error; | |
149 | } else { | |
048e2159 | 150 | ERR("Please specify a tracer (--kernel or --userspace)"); |
e953ef25 DG |
151 | goto error; |
152 | } | |
153 | ||
154 | /* Next event */ | |
155 | event_name = strtok(NULL, ","); | |
156 | } | |
157 | ||
158 | error: | |
b73d0b29 MD |
159 | if (opt_channel_name == NULL) { |
160 | free(channel_name); | |
161 | } | |
cd80958d DG |
162 | lttng_destroy_handle(handle); |
163 | ||
e953ef25 DG |
164 | return ret; |
165 | } | |
166 | ||
167 | /* | |
168 | * cmd_disable_events | |
169 | * | |
170 | * Disable event to trace session | |
171 | */ | |
172 | int cmd_disable_events(int argc, const char **argv) | |
173 | { | |
174 | int opt, ret; | |
175 | static poptContext pc; | |
cd80958d | 176 | char *session_name = NULL; |
e953ef25 DG |
177 | |
178 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
179 | poptReadDefaultConfig(pc, 0); | |
180 | ||
181 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
182 | switch (opt) { | |
183 | case OPT_HELP: | |
184 | usage(stderr); | |
185 | ret = CMD_SUCCESS; | |
186 | goto end; | |
187 | case OPT_USERSPACE: | |
188 | opt_userspace = 1; | |
189 | opt_cmd_name = poptGetOptArg(pc); | |
190 | break; | |
191 | default: | |
192 | usage(stderr); | |
193 | ret = CMD_UNDEFINED; | |
194 | goto end; | |
195 | } | |
196 | } | |
197 | ||
198 | opt_event_list = (char*) poptGetArg(pc); | |
199 | if (opt_event_list == NULL && opt_disable_all == 0) { | |
200 | ERR("Missing event name(s).\n"); | |
201 | usage(stderr); | |
202 | ret = CMD_SUCCESS; | |
203 | goto end; | |
204 | } | |
205 | ||
cd80958d DG |
206 | if (!opt_session_name) { |
207 | session_name = get_session_name(); | |
208 | if (session_name == NULL) { | |
209 | ret = -1; | |
210 | goto end; | |
211 | } | |
212 | } else { | |
213 | session_name = opt_session_name; | |
214 | } | |
215 | ||
216 | ret = disable_events(session_name); | |
e953ef25 DG |
217 | |
218 | end: | |
219 | return ret; | |
220 | } |