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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 | |
6 | * as published by the Free Software Foundation; either version 2 | |
7 | * of the License, or (at your option) any later version. | |
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 "cmd.h" | |
29 | #include "conf.h" | |
30 | #include "utils.h" | |
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 | ||
47 | static struct poptOption long_options[] = { | |
48 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
49 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
5440dc42 | 50 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
e953ef25 DG |
51 | {"all-events", 'a', POPT_ARG_VAL, &opt_disable_all, 1, 0, 0}, |
52 | {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0}, | |
53 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, | |
54 | {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, 0, OPT_USERSPACE, 0, 0}, | |
55 | {"all", 0, POPT_ARG_VAL, &opt_pid_all, 1, 0, 0}, | |
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 DG |
69 | fprintf(ofp, " -c, --channel Apply on this channel\n"); |
70 | fprintf(ofp, " -a, --all-events Enable all tracepoints\n"); | |
71 | fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n"); | |
72 | fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n"); | |
73 | fprintf(ofp, " --all If -u, apply on all traceable apps\n"); | |
74 | fprintf(ofp, " -p, --pid PID If -u, apply on a specific PID\n"); | |
75 | fprintf(ofp, "\n"); | |
76 | } | |
77 | ||
78 | /* | |
79 | * disable_events | |
80 | * | |
81 | * Disabling event using the lttng API. | |
82 | */ | |
83 | static int disable_events(void) | |
84 | { | |
85 | int err, ret = CMD_SUCCESS; | |
86 | char *event_name, *channel_name; | |
87 | struct lttng_event ev; | |
88 | ||
5440dc42 | 89 | if (set_session_name(opt_session_name) < 0) { |
e953ef25 DG |
90 | ret = CMD_ERROR; |
91 | goto error; | |
92 | } | |
93 | ||
94 | if (opt_channel_name == NULL) { | |
95 | err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME); | |
96 | if (err < 0) { | |
97 | ret = CMD_FATAL; | |
98 | goto error; | |
99 | } | |
100 | } else { | |
101 | channel_name = opt_channel_name; | |
102 | } | |
103 | ||
104 | if (opt_disable_all) { | |
105 | if (opt_kernel) { | |
106 | ret = lttng_kernel_disable_event(NULL, channel_name); | |
107 | goto error; | |
108 | } | |
109 | ||
110 | /* TODO: User-space tracer */ | |
111 | } | |
112 | ||
113 | /* Strip event list */ | |
114 | event_name = strtok(opt_event_list, ","); | |
115 | while (event_name != NULL) { | |
116 | /* Kernel tracer action */ | |
117 | if (opt_kernel) { | |
118 | DBG("Disabling kernel event %s for channel %s", | |
119 | event_name, channel_name); | |
120 | ||
121 | /* Copy name and type of the event */ | |
122 | strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN); | |
123 | ret = lttng_kernel_disable_event(event_name, channel_name); | |
124 | if (ret < 0) { | |
125 | MSG("Unable to disable event %s for channel %s", | |
126 | event_name, channel_name); | |
127 | } else { | |
128 | MSG("Kernel event %s disabled for channel %s", | |
129 | event_name, channel_name); | |
130 | } | |
131 | } else if (opt_userspace) { /* User-space tracer action */ | |
132 | /* | |
133 | * TODO: Waiting on lttng UST 2.0 | |
134 | */ | |
135 | if (opt_pid_all) { | |
136 | } else if (opt_pid != 0) { | |
137 | } | |
138 | ret = CMD_NOT_IMPLEMENTED; | |
139 | goto error; | |
140 | } else { | |
141 | ERR("Please specify a tracer (kernel or user-space)"); | |
142 | goto error; | |
143 | } | |
144 | ||
145 | /* Next event */ | |
146 | event_name = strtok(NULL, ","); | |
147 | } | |
148 | ||
149 | error: | |
150 | return ret; | |
151 | } | |
152 | ||
153 | /* | |
154 | * cmd_disable_events | |
155 | * | |
156 | * Disable event to trace session | |
157 | */ | |
158 | int cmd_disable_events(int argc, const char **argv) | |
159 | { | |
160 | int opt, ret; | |
161 | static poptContext pc; | |
162 | ||
163 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
164 | poptReadDefaultConfig(pc, 0); | |
165 | ||
166 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
167 | switch (opt) { | |
168 | case OPT_HELP: | |
169 | usage(stderr); | |
170 | ret = CMD_SUCCESS; | |
171 | goto end; | |
172 | case OPT_USERSPACE: | |
173 | opt_userspace = 1; | |
174 | opt_cmd_name = poptGetOptArg(pc); | |
175 | break; | |
176 | default: | |
177 | usage(stderr); | |
178 | ret = CMD_UNDEFINED; | |
179 | goto end; | |
180 | } | |
181 | } | |
182 | ||
183 | opt_event_list = (char*) poptGetArg(pc); | |
184 | if (opt_event_list == NULL && opt_disable_all == 0) { | |
185 | ERR("Missing event name(s).\n"); | |
186 | usage(stderr); | |
187 | ret = CMD_SUCCESS; | |
188 | goto end; | |
189 | } | |
190 | ||
191 | ret = disable_events(); | |
192 | ||
193 | end: | |
194 | return ret; | |
195 | } |