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f3ed775e 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" | |
beb8c75a | 29 | #include "conf.h" |
f3ed775e DG |
30 | #include "utils.h" |
31 | ||
32 | static char *opt_channel_name; | |
33 | static char *opt_kernel; | |
34 | static char *opt_cmd_name; | |
5440dc42 | 35 | static char *opt_session_name; |
f3ed775e DG |
36 | static int opt_pid_all; |
37 | static int opt_userspace; | |
38 | static pid_t opt_pid; | |
39 | static struct lttng_channel chan; | |
40 | ||
41 | enum { | |
42 | OPT_HELP = 1, | |
43 | OPT_DISCARD, | |
44 | OPT_OVERWRITE, | |
45 | OPT_SUBBUF_SIZE, | |
46 | OPT_NUM_SUBBUF, | |
47 | OPT_SWITCH_TIMER, | |
48 | OPT_READ_TIMER, | |
49 | OPT_USERSPACE, | |
50 | }; | |
51 | ||
52 | static struct poptOption long_options[] = { | |
53 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
54 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
5440dc42 | 55 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
f3ed775e DG |
56 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, |
57 | {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, 0, OPT_USERSPACE, 0, 0}, | |
58 | {"all", 0, POPT_ARG_VAL, &opt_pid_all, 1, 0, 0}, | |
59 | {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, | |
60 | {"discard", 0, POPT_ARG_NONE, 0, OPT_DISCARD, 0, 0}, | |
61 | {"overwrite", 0, POPT_ARG_NONE, 0, OPT_OVERWRITE, 0, 0}, | |
62 | {"subbuf_size", 0, POPT_ARG_DOUBLE, 0, OPT_SUBBUF_SIZE, 0, 0}, | |
63 | {"num_subbuf", 0, POPT_ARG_INT, 0, OPT_NUM_SUBBUF, 0, 0}, | |
64 | {"switch_timer", 0, POPT_ARG_INT, 0, OPT_SWITCH_TIMER, 0, 0}, | |
65 | {"read_timer", 0, POPT_ARG_INT, 0, OPT_READ_TIMER, 0, 0}, | |
66 | {0, 0, 0, 0, 0, 0, 0} | |
67 | }; | |
68 | ||
69 | /* | |
70 | * usage | |
71 | */ | |
72 | static void usage(FILE *ofp) | |
73 | { | |
74 | fprintf(ofp, "usage: lttng add-channel NAME [options] [channel_options]\n"); | |
75 | fprintf(ofp, "\n"); | |
76 | fprintf(ofp, " -h, --help Show this help\n"); | |
5440dc42 | 77 | fprintf(ofp, " -s, --session Apply on session name\n"); |
f3ed775e DG |
78 | fprintf(ofp, " -k, --kernel Apply on the kernel tracer\n"); |
79 | fprintf(ofp, " -u, --userspace [CMD] Apply on the user-space tracer\n"); | |
80 | fprintf(ofp, " --all If -u, apply on all traceable apps\n"); | |
81 | fprintf(ofp, " -p, --pid PID If -u, apply on a specific PID\n"); | |
82 | fprintf(ofp, "\n"); | |
83 | fprintf(ofp, "Channel options:\n"); | |
84 | fprintf(ofp, " --discard Discard event when buffers are full (default)\n"); | |
85 | fprintf(ofp, " --overwrite Flight recorder mode\n"); | |
86 | fprintf(ofp, " --subbuf_size Subbuffer size in bytes (default: 4096)\n"); | |
87 | fprintf(ofp, " --num_subbuf Number of subbufers (default: 2)\n"); | |
88 | fprintf(ofp, " --switch_timer Switch timer interval in usec (default: 0)\n"); | |
89 | fprintf(ofp, " --read_timer Read timer interval in usec (default: 200)\n"); | |
90 | fprintf(ofp, "\n"); | |
91 | } | |
92 | ||
93 | /* | |
94 | * add_channel | |
95 | * | |
96 | * Adding channel using the lttng API. | |
97 | */ | |
98 | static int add_channel(void) | |
99 | { | |
100 | int ret = CMD_SUCCESS; | |
101 | ||
5440dc42 | 102 | if (set_session_name(opt_session_name) < 0) { |
f3ed775e DG |
103 | ret = CMD_ERROR; |
104 | goto error; | |
105 | } | |
106 | ||
107 | /* Copy channel name and normalize it */ | |
108 | strncpy(chan.name, opt_channel_name, NAME_MAX); | |
109 | chan.name[NAME_MAX - 1] = '\0'; | |
110 | ||
111 | /* Kernel tracer action */ | |
112 | if (opt_kernel) { | |
113 | /* Create kernel channel */ | |
114 | ret = lttng_kernel_create_channel(&chan); | |
115 | if (ret < 0) { | |
116 | goto error; | |
117 | } | |
118 | } else if (opt_userspace) { /* User-space tracer action */ | |
119 | /* | |
120 | * TODO: Waiting on lttng UST 2.0 | |
121 | */ | |
122 | if (opt_pid_all) { | |
123 | } else if (opt_pid != 0) { | |
124 | } | |
125 | ret = CMD_NOT_IMPLEMENTED; | |
126 | goto error; | |
127 | } else { | |
128 | ERR("Please specify a tracer (kernel or user-space)"); | |
129 | goto error; | |
130 | } | |
131 | ||
132 | MSG("Channel %s created", opt_channel_name); | |
133 | ||
134 | error: | |
135 | return ret; | |
136 | } | |
137 | ||
138 | /* | |
139 | * init_channel_config | |
140 | * | |
141 | * Default value for channel configuration. | |
142 | */ | |
143 | static void init_channel_config(void) | |
144 | { | |
145 | chan.attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
146 | chan.attr.subbuf_size = DEFAULT_CHANNEL_SUBBUF_SIZE; | |
147 | chan.attr.num_subbuf = DEFAULT_CHANNEL_SUBBUF_NUM; | |
148 | chan.attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER; | |
149 | chan.attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER; | |
7d452e12 | 150 | chan.attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT; |
f3ed775e DG |
151 | } |
152 | ||
153 | /* | |
154 | * cmd_add_channel | |
155 | * | |
156 | * Add channel to trace session | |
157 | */ | |
158 | int cmd_add_channel(int argc, const char **argv) | |
159 | { | |
160 | int opt, ret; | |
161 | static poptContext pc; | |
162 | ||
163 | init_channel_config(); | |
164 | ||
165 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
166 | poptReadDefaultConfig(pc, 0); | |
167 | ||
168 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
169 | switch (opt) { | |
170 | case OPT_HELP: | |
171 | usage(stderr); | |
172 | ret = CMD_SUCCESS; | |
173 | goto end; | |
174 | case OPT_USERSPACE: | |
175 | opt_userspace = 1; | |
176 | opt_cmd_name = poptGetOptArg(pc); | |
177 | break; | |
178 | case OPT_DISCARD: | |
179 | chan.attr.overwrite = 0; | |
180 | DBG("Channel set to discard"); | |
181 | break; | |
182 | case OPT_OVERWRITE: | |
183 | chan.attr.overwrite = 1; | |
184 | DBG("Channel set to overwrite"); | |
185 | break; | |
186 | case OPT_SUBBUF_SIZE: | |
187 | chan.attr.subbuf_size = atol(poptGetOptArg(pc)); | |
188 | DBG("Channel subbuf size set to %lu", chan.attr.subbuf_size); | |
189 | break; | |
190 | case OPT_NUM_SUBBUF: | |
191 | chan.attr.num_subbuf = atoi(poptGetOptArg(pc)); | |
192 | DBG("Channel subbuf num set to %lu", chan.attr.num_subbuf); | |
193 | break; | |
194 | case OPT_SWITCH_TIMER: | |
195 | chan.attr.switch_timer_interval = atoi(poptGetOptArg(pc)); | |
196 | DBG("Channel switch timer interval set to %d", chan.attr.switch_timer_interval); | |
197 | break; | |
198 | case OPT_READ_TIMER: | |
199 | chan.attr.read_timer_interval = atoi(poptGetOptArg(pc)); | |
200 | DBG("Channel read timer interval set to %d", chan.attr.read_timer_interval); | |
201 | break; | |
202 | default: | |
203 | usage(stderr); | |
204 | ret = CMD_UNDEFINED; | |
205 | goto end; | |
206 | } | |
207 | } | |
208 | ||
209 | opt_channel_name = (char*) poptGetArg(pc); | |
210 | if (opt_channel_name == NULL) { | |
211 | ERR("Missing channel name.\n"); | |
212 | usage(stderr); | |
213 | ret = CMD_SUCCESS; | |
214 | goto end; | |
215 | } | |
216 | ||
217 | ret = add_channel(); | |
218 | ||
219 | end: | |
220 | return ret; | |
221 | } |