[lttng-tools.git] / lttng / commands / enable_events.c

/*
 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; only version 2
 * of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#define _GNU_SOURCE
#include <popt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <inttypes.h>
#include <ctype.h>

#include "../cmd.h"
#include "../conf.h"
#include "../utils.h"

static char *opt_event_list;
static int opt_event_type;
static char *opt_kernel;
static char *opt_cmd_name;
static char *opt_session_name;
static int opt_pid_all;
static int opt_userspace;
static int opt_enable_all;
static pid_t opt_pid;
static char *opt_probe;
static char *opt_function;
static char *opt_function_entry_symbol;
static char *opt_channel_name;

enum {
	OPT_HELP = 1,
	OPT_USERSPACE,
	OPT_TRACEPOINT,
	OPT_MARKER,
	OPT_PROBE,
	OPT_FUNCTION,
	OPT_FUNCTION_ENTRY,
};

static struct poptOption long_options[] = {
	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	{"help",           'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
	{"session",        's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
	{"all-events",     'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
	{"channel",        'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
	{"kernel",         'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
	{"userspace",      'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, 0, OPT_USERSPACE, 0, 0},
	{"all",            0,   POPT_ARG_VAL, &opt_pid_all, 1, 0, 0},
	{"pid",            'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
	{"tracepoint",     0,   POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
	{"marker",         0,   POPT_ARG_NONE, 0, OPT_MARKER, 0, 0},
	{"probe",         0,   POPT_ARG_STRING, 0, OPT_PROBE, 0, 0},
	{"function",       0,   POPT_ARG_STRING, 0, OPT_FUNCTION, 0, 0},
	{"function:entry", 0,   POPT_ARG_STRING, 0, OPT_FUNCTION_ENTRY, 0, 0},
	{0, 0, 0, 0, 0, 0, 0}
};

/*
 * usage
 */
static void usage(FILE *ofp)
{
	fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "  -h, --help               Show this help\n");
	fprintf(ofp, "  -s, --session            Apply on session name\n");
	fprintf(ofp, "  -c, --channel            Apply on this channel\n");
	fprintf(ofp, "  -a, --all-events         Enable all tracepoints\n");
	fprintf(ofp, "  -k, --kernel             Apply for the kernel tracer\n");
	fprintf(ofp, "  -u, --userspace [CMD]    Apply for the user-space tracer\n");
	fprintf(ofp, "      --all                If -u, apply on all traceable apps\n");
	fprintf(ofp, "  -p, --pid PID            If -u, apply on a specific PID\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "Event options:\n");
	fprintf(ofp, "    --tracepoint           Tracepoint event (default)\n");
	fprintf(ofp, "    --probe [addr | symbol | symbol+offset]\n");
	fprintf(ofp, "                           Dynamic probe.\n");
	fprintf(ofp, "                           Addr and offset can be octal (0NNN...),\n");
	fprintf(ofp, "                           decimal (NNN...) or hexadecimal (0xNNN...)\n");
	fprintf(ofp, "    --function [addr | symbol | symbol+offset]\n");
	fprintf(ofp, "                           Dynamic function entry/return probe.\n");
	fprintf(ofp, "                           Addr and offset can be octal (0NNN...),\n");
	fprintf(ofp, "                           decimal (NNN...) or hexadecimal (0xNNN...)\n");
	fprintf(ofp, "    --function:entry symbol\n");
	fprintf(ofp, "                           Function tracer event\n");
	fprintf(ofp, "    --marker               User-space marker (deprecated)\n");
	fprintf(ofp, "\n");
}

/*
 *  parse_probe_addr
 *
 *  Parse probe options.
 */
static int parse_probe_opts(struct lttng_event *ev, char *opt)
{
	int ret;
	char s_hex[19];
	char name[LTTNG_SYMBOL_NAME_LEN];

	if (opt == NULL) {
		ret = -1;
		goto end;
	}

	/* Check for symbol+offset */
	ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
	if (ret == 2) {
		strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
		DBG("probe symbol %s", ev->attr.probe.symbol_name);
		if (strlen(s_hex) == 0) {
			ERR("Invalid probe offset %s", s_hex);
			ret = -1;
			goto end;
		}
		ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
		DBG("probe offset %" PRIu64, ev->attr.probe.offset);
		ev->attr.probe.addr = 0;
		goto end;
	}

	/* Check for symbol */
	if (isalpha(name[0])) {
		ret = sscanf(opt, "%s", name);
		if (ret == 1) {
			strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
			DBG("probe symbol %s", ev->attr.probe.symbol_name);
			ev->attr.probe.offset = 0;
			DBG("probe offset %" PRIu64, ev->attr.probe.offset);
			ev->attr.probe.addr = 0;
			goto end;
		}
	}

	/* Check for address */
	ret = sscanf(opt, "%s", s_hex);
	if (ret > 0) {
		if (strlen(s_hex) == 0) {
			ERR("Invalid probe address %s", s_hex);
			ret = -1;
			goto end;
		}
		ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
		DBG("probe addr %" PRIu64, ev->attr.probe.addr);
		ev->attr.probe.offset = 0;
		memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
		goto end;
	}

	/* No match */
	ret = -1;

end:
	return ret;
}

/*
 *  enable_events
 *
 *  Enabling event using the lttng API.
 */
static int enable_events(void)
{
	int err, ret = CMD_SUCCESS;
	char *event_name, *channel_name = NULL;
	struct lttng_event ev;
	struct lttng_domain dom;

	if (opt_channel_name == NULL) {
		err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
		if (err < 0) {
			ret = CMD_FATAL;
			goto error;
		}
	} else {
		channel_name = opt_channel_name;
	}

	/* Create lttng domain */
	if (opt_kernel) {
		dom.type = LTTNG_DOMAIN_KERNEL;
	}

	if (opt_enable_all) {
		if (set_session_name(opt_session_name) < 0) {
			ret = CMD_ERROR;
			goto error;
		}

		if (opt_kernel) {
			ret = lttng_enable_event(&dom, NULL, channel_name);
			if (ret == 0) {
				MSG("All kernel events are enabled in channel %s", channel_name);
			}
			goto error;
		}

		/* TODO: User-space tracer */
	}

	/* Strip event list */
	event_name = strtok(opt_event_list, ",");
	while (event_name != NULL) {
		if (set_session_name(opt_session_name) < 0) {
			ret = CMD_ERROR;
			goto error;
		}

		/* Kernel tracer action */
		if (opt_kernel) {
			DBG("Enabling kernel event %s for channel %s",
					event_name, channel_name);
			/* Copy name and type of the event */
			strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
			ev.type = opt_event_type;

			switch (opt_event_type) {
			case LTTNG_EVENT_TRACEPOINT:
				break;
			case LTTNG_EVENT_PROBE:
				ret = parse_probe_opts(&ev, opt_probe);
				if (ret < 0) {
					ERR("Unable to parse probe options");
					ret = 0;
					goto error;
				}
				break;
			case LTTNG_EVENT_FUNCTION:
				ret = parse_probe_opts(&ev, opt_function);
				if (ret < 0) {
					ERR("Unable to parse function probe options");
					ret = 0;
					goto error;
				}
				break;
			case LTTNG_EVENT_FUNCTION_ENTRY:
				strncpy(ev.attr.ftrace.symbol_name,
					opt_function_entry_symbol,
					LTTNG_SYMBOL_NAME_LEN);
				break;
			default:
				ret = CMD_NOT_IMPLEMENTED;
				goto error;
			}

			ret = lttng_enable_event(&dom, &ev, channel_name);
			if (ret == 0) {
				MSG("Kernel event %s created in channel %s", event_name, channel_name);
			}
		} else if (opt_userspace) {		/* User-space tracer action */
			/*
			 * TODO: Waiting on lttng UST 2.0
			 */
			if (opt_pid_all) {
			} else if (opt_pid != 0) {
			}
			ret = CMD_NOT_IMPLEMENTED;
			goto error;
		} else {
			ERR("Please specify a tracer (kernel or user-space)");
			goto error;
		}

		/* Next event */
		event_name = strtok(NULL, ",");
	}

error:
	if (opt_channel_name == NULL) {
		free(channel_name);
	}
	return ret;
}

/*
 *  cmd_enable_events
 *
 *  Add event to trace session
 */
int cmd_enable_events(int argc, const char **argv)
{
	int opt, ret;
	static poptContext pc;

	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	poptReadDefaultConfig(pc, 0);

	/* Default event type */
	opt_event_type = LTTNG_EVENT_TRACEPOINT;

	while ((opt = poptGetNextOpt(pc)) != -1) {
		switch (opt) {
		case OPT_HELP:
			usage(stderr);
			ret = CMD_SUCCESS;
			goto end;
		case OPT_USERSPACE:
			opt_userspace = 1;
			opt_cmd_name = poptGetOptArg(pc);
			break;
		case OPT_TRACEPOINT:
			opt_event_type = LTTNG_EVENT_TRACEPOINT;
			break;
		case OPT_MARKER:
			ret = CMD_NOT_IMPLEMENTED;
			goto end;
		case OPT_PROBE:
			opt_event_type = LTTNG_EVENT_PROBE;
			opt_probe = poptGetOptArg(pc);
			break;
		case OPT_FUNCTION:
			opt_event_type = LTTNG_EVENT_FUNCTION;
			opt_function = poptGetOptArg(pc);
			break;
		case OPT_FUNCTION_ENTRY:
			opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
			opt_function_entry_symbol = poptGetOptArg(pc);
			break;
		default:
			usage(stderr);
			ret = CMD_UNDEFINED;
			goto end;
		}
	}

	opt_event_list = (char*) poptGetArg(pc);
	if (opt_event_list == NULL && opt_enable_all == 0) {
		ERR("Missing event name(s).\n");
		usage(stderr);
		ret = CMD_SUCCESS;
		goto end;
	}

	ret = enable_events();

end:
	return ret;
}
Commit	Line	Data
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
82a3637f DG	6	* as published by the Free Software Foundation; only version 2
82a3637f DG	7	* of the License.
f3ed775e 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>
5a0de755	27	#include <inttypes.h>
8f0d098b	28	#include <ctype.h>
f3ed775e	29
6e2d116c DG	30	#include "../cmd.h"
	31	#include "../conf.h"
	32	#include "../utils.h"
f3ed775e DG	33
	34	static char *opt_event_list;
	35	static int opt_event_type;
	36	static char *opt_kernel;
	37	static char *opt_cmd_name;
5440dc42	38	static char *opt_session_name;
f3ed775e DG	39	static int opt_pid_all;
	40	static int opt_userspace;
	41	static int opt_enable_all;
	42	static pid_t opt_pid;
cf0e5467	43	static char *opt_probe;
8f0d098b MD	44	static char *opt_function;
8f0d098b MD	45	static char *opt_function_entry_symbol;
f3ed775e DG	46	static char *opt_channel_name;
	47
	48	enum {
	49	OPT_HELP = 1,
	50	OPT_USERSPACE,
	51	OPT_TRACEPOINT,
	52	OPT_MARKER,
cf0e5467	53	OPT_PROBE,
f3ed775e	54	OPT_FUNCTION,
8f0d098b	55	OPT_FUNCTION_ENTRY,
f3ed775e DG	56	};
	57
	58	static struct poptOption long_options[] = {
	59	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	60	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42	61	{"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
f3ed775e DG	62	{"all-events", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
	63	{"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
	64	{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
	65	{"userspace", 'u', POPT_ARG_STRING \| POPT_ARGFLAG_OPTIONAL, 0, OPT_USERSPACE, 0, 0},
	66	{"all", 0, POPT_ARG_VAL, &opt_pid_all, 1, 0, 0},
	67	{"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
	68	{"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
	69	{"marker", 0, POPT_ARG_NONE, 0, OPT_MARKER, 0, 0},
cf0e5467	70	{"probe", 0, POPT_ARG_STRING, 0, OPT_PROBE, 0, 0},
f3ed775e	71	{"function", 0, POPT_ARG_STRING, 0, OPT_FUNCTION, 0, 0},
8f0d098b	72	{"function:entry", 0, POPT_ARG_STRING, 0, OPT_FUNCTION_ENTRY, 0, 0},
f3ed775e DG	73	{0, 0, 0, 0, 0, 0, 0}
	74	};
	75
	76	/*
	77	* usage
	78	*/
	79	static void usage(FILE *ofp)
	80	{
	81	fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
	82	fprintf(ofp, "\n");
	83	fprintf(ofp, " -h, --help Show this help\n");
5440dc42	84	fprintf(ofp, " -s, --session Apply on session name\n");
f3ed775e DG	85	fprintf(ofp, " -c, --channel Apply on this channel\n");
	86	fprintf(ofp, " -a, --all-events Enable all tracepoints\n");
	87	fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
	88	fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n");
	89	fprintf(ofp, " --all If -u, apply on all traceable apps\n");
	90	fprintf(ofp, " -p, --pid PID If -u, apply on a specific PID\n");
	91	fprintf(ofp, "\n");
	92	fprintf(ofp, "Event options:\n");
	93	fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
8f0d098b	94	fprintf(ofp, " --probe [addr \| symbol \| symbol+offset]\n");
cf0e5467 MD	95	fprintf(ofp, " Dynamic probe.\n");
	96	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	97	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
8f0d098b MD	98	fprintf(ofp, " --function [addr \| symbol \| symbol+offset]\n");
	99	fprintf(ofp, " Dynamic function entry/return probe.\n");
	100	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	101	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
	102	fprintf(ofp, " --function:entry symbol\n");
	103	fprintf(ofp, " Function tracer event\n");
f3ed775e DG	104	fprintf(ofp, " --marker User-space marker (deprecated)\n");
	105	fprintf(ofp, "\n");
	106	}
	107
0d63dd19	108	/*
cf0e5467	109	* parse_probe_addr
0d63dd19	110	*
cf0e5467	111	* Parse probe options.
0d63dd19	112	*/
cf0e5467	113	static int parse_probe_opts(struct lttng_event ev, char opt)
0d63dd19 DG	114	{
0d63dd19 DG	115	int ret;
8ff0bbd0	116	char s_hex[19];
0d63dd19 DG	117	char name[LTTNG_SYMBOL_NAME_LEN];
	118
	119	if (opt == NULL) {
	120	ret = -1;
8f0d098b	121	goto end;
0d63dd19 DG	122	}
	123
	124	/* Check for symbol+offset */
8ff0bbd0	125	ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19	126	if (ret == 2) {
7d29a247	127	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
cf0e5467	128	DBG("probe symbol %s", ev->attr.probe.symbol_name);
8ff0bbd0 DG	129	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	130	ERR("Invalid probe offset %s", s_hex);
0d63dd19	131	ret = -1;
8f0d098b	132	goto end;
0d63dd19	133	}
8ff0bbd0	134	ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467	135	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78	136	ev->attr.probe.addr = 0;
8f0d098b MD	137	goto end;
	138	}
	139
	140	/* Check for symbol */
	141	if (isalpha(name[0])) {
	142	ret = sscanf(opt, "%s", name);
	143	if (ret == 1) {
	144	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
	145	DBG("probe symbol %s", ev->attr.probe.symbol_name);
	146	ev->attr.probe.offset = 0;
	147	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
	148	ev->attr.probe.addr = 0;
	149	goto end;
	150	}
0d63dd19 DG	151	}
	152
	153	/* Check for address */
8ff0bbd0	154	ret = sscanf(opt, "%s", s_hex);
0d63dd19	155	if (ret > 0) {
8ff0bbd0 DG	156	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	157	ERR("Invalid probe address %s", s_hex);
0d63dd19	158	ret = -1;
8f0d098b	159	goto end;
0d63dd19	160	}
8ff0bbd0	161	ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467	162	DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78 DG	163	ev->attr.probe.offset = 0;
3000dc78 DG	164	memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b	165	goto end;
0d63dd19 DG	166	}
	167
	168	/* No match */
	169	ret = -1;
	170
8f0d098b	171	end:
0d63dd19 DG	172	return ret;
	173	}
	174
f3ed775e DG	175	/*
	176	* enable_events
	177	*
	178	* Enabling event using the lttng API.
	179	*/
	180	static int enable_events(void)
	181	{
	182	int err, ret = CMD_SUCCESS;
b73d0b29	183	char event_name, channel_name = NULL;
f3ed775e	184	struct lttng_event ev;
7d29a247	185	struct lttng_domain dom;
f3ed775e	186
f3ed775e DG	187	if (opt_channel_name == NULL) {
	188	err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
	189	if (err < 0) {
	190	ret = CMD_FATAL;
	191	goto error;
	192	}
	193	} else {
	194	channel_name = opt_channel_name;
	195	}
	196
7d29a247 DG	197	/* Create lttng domain */
	198	if (opt_kernel) {
	199	dom.type = LTTNG_DOMAIN_KERNEL;
	200	}
	201
f3ed775e	202	if (opt_enable_all) {
1aef21b6 DG	203	if (set_session_name(opt_session_name) < 0) {
	204	ret = CMD_ERROR;
	205	goto error;
	206	}
	207
f3ed775e	208	if (opt_kernel) {
7d29a247	209	ret = lttng_enable_event(&dom, NULL, channel_name);
c93d9daf DG	210	if (ret == 0) {
	211	MSG("All kernel events are enabled in channel %s", channel_name);
	212	}
f3ed775e DG	213	goto error;
	214	}
	215
	216	/* TODO: User-space tracer */
	217	}
	218
	219	/* Strip event list */
	220	event_name = strtok(opt_event_list, ",");
	221	while (event_name != NULL) {
1aef21b6 DG	222	if (set_session_name(opt_session_name) < 0) {
	223	ret = CMD_ERROR;
	224	goto error;
	225	}
	226
f3ed775e DG	227	/* Kernel tracer action */
	228	if (opt_kernel) {
	229	DBG("Enabling kernel event %s for channel %s",
	230	event_name, channel_name);
	231	/* Copy name and type of the event */
	232	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	233	ev.type = opt_event_type;
	234
	235	switch (opt_event_type) {
e6ddca71	236	case LTTNG_EVENT_TRACEPOINT:
f3ed775e	237	break;
7d29a247	238	case LTTNG_EVENT_PROBE:
cf0e5467	239	ret = parse_probe_opts(&ev, opt_probe);
0d63dd19	240	if (ret < 0) {
cf0e5467	241	ERR("Unable to parse probe options");
0d63dd19 DG	242	ret = 0;
	243	goto error;
	244	}
f3ed775e DG	245	break;
f3ed775e DG	246	case LTTNG_EVENT_FUNCTION:
8f0d098b MD	247	ret = parse_probe_opts(&ev, opt_function);
	248	if (ret < 0) {
	249	ERR("Unable to parse function probe options");
	250	ret = 0;
	251	goto error;
	252	}
	253	break;
	254	case LTTNG_EVENT_FUNCTION_ENTRY:
	255	strncpy(ev.attr.ftrace.symbol_name,
	256	opt_function_entry_symbol,
	257	LTTNG_SYMBOL_NAME_LEN);
f3ed775e DG	258	break;
	259	default:
	260	ret = CMD_NOT_IMPLEMENTED;
	261	goto error;
	262	}
	263
7d29a247 DG	264	ret = lttng_enable_event(&dom, &ev, channel_name);
7d29a247 DG	265	if (ret == 0) {
f3ed775e DG	266	MSG("Kernel event %s created in channel %s", event_name, channel_name);
	267	}
	268	} else if (opt_userspace) { /* User-space tracer action */
	269	/*
	270	* TODO: Waiting on lttng UST 2.0
	271	*/
	272	if (opt_pid_all) {
	273	} else if (opt_pid != 0) {
	274	}
	275	ret = CMD_NOT_IMPLEMENTED;
	276	goto error;
	277	} else {
	278	ERR("Please specify a tracer (kernel or user-space)");
	279	goto error;
	280	}
	281
	282	/* Next event */
	283	event_name = strtok(NULL, ",");
	284	}
	285
	286	error:
b73d0b29 MD	287	if (opt_channel_name == NULL) {
	288	free(channel_name);
	289	}
f3ed775e DG	290	return ret;
	291	}
	292
	293	/*
	294	* cmd_enable_events
	295	*
	296	* Add event to trace session
	297	*/
	298	int cmd_enable_events(int argc, const char **argv)
	299	{
	300	int opt, ret;
	301	static poptContext pc;
	302
	303	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	304	poptReadDefaultConfig(pc, 0);
	305
	306	/* Default event type */
e6ddca71	307	opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e DG	308
	309	while ((opt = poptGetNextOpt(pc)) != -1) {
	310	switch (opt) {
	311	case OPT_HELP:
	312	usage(stderr);
	313	ret = CMD_SUCCESS;
	314	goto end;
	315	case OPT_USERSPACE:
	316	opt_userspace = 1;
	317	opt_cmd_name = poptGetOptArg(pc);
	318	break;
	319	case OPT_TRACEPOINT:
e6ddca71	320	opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e DG	321	break;
	322	case OPT_MARKER:
	323	ret = CMD_NOT_IMPLEMENTED;
	324	goto end;
cf0e5467	325	case OPT_PROBE:
7d29a247	326	opt_event_type = LTTNG_EVENT_PROBE;
cf0e5467	327	opt_probe = poptGetOptArg(pc);
f3ed775e DG	328	break;
	329	case OPT_FUNCTION:
	330	opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b MD	331	opt_function = poptGetOptArg(pc);
	332	break;
	333	case OPT_FUNCTION_ENTRY:
	334	opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
	335	opt_function_entry_symbol = poptGetOptArg(pc);
f3ed775e DG	336	break;
	337	default:
	338	usage(stderr);
	339	ret = CMD_UNDEFINED;
	340	goto end;
	341	}
	342	}
	343
	344	opt_event_list = (char*) poptGetArg(pc);
	345	if (opt_event_list == NULL && opt_enable_all == 0) {
	346	ERR("Missing event name(s).\n");
	347	usage(stderr);
	348	ret = CMD_SUCCESS;
	349	goto end;
	350	}
	351
	352	ret = enable_events();
	353
	354	end:
	355	return ret;
	356	}