Fix sending fd through sendmsg/recvmsg ancillary data
[lttng-tools.git] / lttng / commands / add_context.c
CommitLineData
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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
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6 * as published by the Free Software Foundation; only version 2
7 * of the License.
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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
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28#include <urcu/list.h>
29
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30#include "../cmd.h"
31#include "../conf.h"
32#include "../utils.h"
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33
34static char *opt_event_name;
35static char *opt_channel_name;
36static char *opt_perf_name;
5440dc42 37static char *opt_session_name;
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38static int *opt_kernel;
39static int opt_pid_all;
40static int opt_userspace;
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41static int opt_perf_type = -1;
42static int opt_perf_id = -1;
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43static pid_t opt_pid;
44
45enum {
46 OPT_HELP = 1,
47 OPT_TYPE,
48};
49
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50struct ctx_type_list {
51 struct cds_list_head head;
52};
53
54struct ctx_type {
55 int type;
56 struct cds_list_head list;
57};
58
59static struct ctx_type_list ctx_type_list = {
60 .head = CDS_LIST_HEAD_INIT(ctx_type_list.head),
61};
62
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63static struct poptOption long_options[] = {
64 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
65 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42 66 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
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67 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
68 {"event", 'e', POPT_ARG_STRING, &opt_event_name, 0, 0, 0},
69 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
70 {"userspace", 'u', POPT_ARG_VAL, &opt_userspace, 1, 0, 0},
71 {"all", 0, POPT_ARG_VAL, &opt_pid_all, 1, 0, 0},
72 {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
73 {"type", 't', POPT_ARG_INT, 0, OPT_TYPE, 0, 0},
74 {"perf-name", 0, POPT_ARG_STRING, &opt_perf_name, 0, 0, 0},
75 {"perf-type", 0, POPT_ARG_INT, &opt_perf_type, 0, 0, 0},
76 {"perf-id", 0, POPT_ARG_INT, &opt_perf_id, 0, 0, 0},
77 {0, 0, 0, 0, 0, 0, 0}
78};
79
80/*
81 * usage
82 */
83static void usage(FILE *ofp)
84{
85 fprintf(ofp, "usage: lttng add-context [options] [context_options]\n");
86 fprintf(ofp, "\n");
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87
88 fprintf(ofp, "If no event name is given (-e), the context will be added to "
89 "all events in the channel.\n");
90 fprintf(ofp, "If no channel and no event is given (-c/-e), the context "
91 "will be added to all events in all channels\n");
92 fprintf(ofp, "\n");
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93 fprintf(ofp, "Options:\n");
94 fprintf(ofp, " -h, --help Show this help\n");
5440dc42 95 fprintf(ofp, " -s, --session Apply on session name\n");
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96 fprintf(ofp, " -c, --channel NAME Apply on channel\n");
97 fprintf(ofp, " -e, --event NAME Apply on event\n");
98 fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
99 fprintf(ofp, " -u, --userspace Apply for the user-space tracer\n");
100 fprintf(ofp, " --all If -u, apply on all traceable apps\n");
101 fprintf(ofp, " -p, --pid PID If -u, apply on a specific PID\n");
102 fprintf(ofp, " -t, --type TYPE Context type. TYPE must be a numerical value:\n");
103 fprintf(ofp, " KERNEL_CONTEXT_PID = 0\n");
104 fprintf(ofp, " KERNEL_CONTEXT_PERF_COUNTER = 1\n");
105 fprintf(ofp, " KERNEL_CONTEXT_COMM = 2\n");
106 fprintf(ofp, " KERNEL_CONTEXT_PRIO = 3\n");
107 fprintf(ofp, " KERNEL_CONTEXT_NICE = 4\n");
108 fprintf(ofp, " KERNEL_CONTEXT_VPID = 5\n");
109 fprintf(ofp, " KERNEL_CONTEXT_TID = 6\n");
110 fprintf(ofp, " KERNEL_CONTEXT_VTID = 7\n");
111 fprintf(ofp, " KERNEL_CONTEXT_PPID = 8\n");
112 fprintf(ofp, " KERNEL_CONTEXT_VPPID = 9\n");
113 fprintf(ofp, "\n");
114 fprintf(ofp, "Context options:\n");
115 fprintf(ofp, " --perf-name NAME Perf event name\n");
116 fprintf(ofp, " --perf-type TYPE Perf event type. TYPE must be a numeric value:\n");
117 fprintf(ofp, " PERF_TYPE_HARDWARE = 0\n");
118 fprintf(ofp, " PERF_TYPE_SOFTWARE = 1\n");
119 fprintf(ofp, " --perf-id ID Perf event id. ID must be a numeric value:\n");
120 fprintf(ofp, " Hardware IDs (0):\n");
121 fprintf(ofp, " PERF_COUNT_HW_CPU_CYCLES = 0\n");
122 fprintf(ofp, " PERF_COUNT_HW_INSTRUCTIONS = 1\n");
123 fprintf(ofp, " PERF_COUNT_HW_CACHE_REFERENCES = 2\n");
124 fprintf(ofp, " PERF_COUNT_HW_CACHE_MISSES = 3\n");
125 fprintf(ofp, " PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4\n");
126 fprintf(ofp, " PERF_COUNT_HW_BRANCH_MISSES = 5\n");
127 fprintf(ofp, " PERF_COUNT_HW_BUS_CYCLES = 6\n");
128 fprintf(ofp, " Software IDs (1):\n");
129 fprintf(ofp, " PERF_COUNT_SW_CPU_CLOCK = 0\n");
130 fprintf(ofp, " PERF_COUNT_SW_TASK_CLOCK = 1\n");
131 fprintf(ofp, " PERF_COUNT_SW_PAGE_FAULTS = 2\n");
132 fprintf(ofp, " PERF_COUNT_SW_CONTEXT_SWITCHES = 3\n");
133 fprintf(ofp, " PERF_COUNT_SW_CPU_MIGRATIONS = 4\n");
134 fprintf(ofp, " PERF_COUNT_SW_PAGE_FAULTS_MIN = 5\n");
135 fprintf(ofp, " PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6\n");
136 fprintf(ofp, "\n");
137}
138
139/*
140 * add_context
141 *
142 * Add context to channel or event.
143 */
3301e740 144static int add_context(void)
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145{
146 int ret = CMD_SUCCESS;
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147 struct lttng_event_context context;
148 struct lttng_domain dom;
3301e740 149 struct ctx_type *type;
d65106b1 150
5440dc42 151 if (set_session_name(opt_session_name) < 0) {
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152 ret = CMD_ERROR;
153 goto error;
154 }
155
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156 /* Iterate over all context type given */
157 cds_list_for_each_entry(type, &ctx_type_list.head, list) {
158 context.ctx = type->type;
159 if (type->type == LTTNG_KERNEL_CONTEXT_PERF_COUNTER) {
160 /* Not defined */
161 if (opt_perf_type == -1) {
162 ERR("No perf event type given. Please use --perf-type TYPE.");
163 goto error;
164 }
165 context.u.perf_counter.type = opt_perf_type;
166 if (opt_perf_id == -1) {
167 ERR("No perf event id given. Please use --perf-id ID.");
168 goto error;
169 }
170 context.u.perf_counter.config = opt_perf_id;
171 if (opt_perf_name == NULL) {
172 ERR("No perf name given. Please use --perf-name NAME.");
173 goto error;
174 }
175 strncpy(context.u.perf_counter.name, opt_perf_name,
176 LTTNG_SYMBOL_NAME_LEN);
177 }
d65106b1 178
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179 if (opt_kernel) {
180 /* Create kernel domain */
181 dom.type = LTTNG_DOMAIN_KERNEL;
7d29a247 182
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183 DBG("Adding kernel context");
184 ret = lttng_add_context(&dom, &context, opt_event_name,
185 opt_channel_name);
186 if (ret < 0) {
187 goto error;
188 } else {
189 if (type->type == LTTNG_KERNEL_CONTEXT_PERF_COUNTER) {
190 MSG("Perf counter context added");
191 } else {
192 MSG("Kernel context %d added", type->type);
193 }
194 }
195 } else if (opt_userspace) { /* User-space tracer action */
196 /*
197 * TODO: Waiting on lttng UST 2.0
198 */
199 if (opt_pid_all) {
200 } else if (opt_pid != 0) {
201 }
202 ret = CMD_NOT_IMPLEMENTED;
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203 goto error;
204 } else {
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205 ERR("Please specify a tracer (kernel or user-space)");
206 goto error;
d65106b1 207 }
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208 }
209
210error:
211 return ret;
212}
213
214/*
215 * cmd_add_context
216 *
217 * Add context on channel or event.
218 */
219int cmd_add_context(int argc, const char **argv)
220{
636167b6 221 int opt, ret = CMD_SUCCESS;
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222 char *tmp;
223 static poptContext pc;
3301e740 224 struct ctx_type *type;
d65106b1 225
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226 if (argc < 2) {
227 usage(stderr);
228 goto end;
229 }
230
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231 pc = poptGetContext(NULL, argc, argv, long_options, 0);
232 poptReadDefaultConfig(pc, 0);
233
234 while ((opt = poptGetNextOpt(pc)) != -1) {
235 switch (opt) {
236 case OPT_HELP:
237 usage(stderr);
238 ret = CMD_SUCCESS;
239 goto end;
240 case OPT_TYPE:
241 /* Mandatory field */
242 tmp = poptGetOptArg(pc);
243 if (tmp == NULL) {
244 usage(stderr);
245 ret = CMD_ERROR;
636167b6 246 free(tmp);
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247 goto end;
248 }
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249 type = malloc(sizeof(struct ctx_type));
250 if (type == NULL) {
251 perror("malloc ctx_type");
252 ret = -1;
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253 goto end;
254 }
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255 type->type = atoi(tmp);
256 cds_list_add(&type->list, &ctx_type_list.head);
636167b6 257 free(tmp);
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258 break;
259 default:
260 usage(stderr);
261 ret = CMD_UNDEFINED;
262 goto end;
263 }
264 }
265
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266 ret = add_context();
267
268 /* Cleanup allocated memory */
269 cds_list_for_each_entry(type, &ctx_type_list.head, list) {
270 free(type);
271 }
272
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273end:
274 return ret;
275}
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