[lttng-tools.git] / lttng / commands / disable_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 "../cmd.h"
#include "../conf.h"
#include "../utils.h"

static char *opt_event_list;
static int opt_kernel;
static char *opt_channel_name;
static char *opt_session_name;
static int opt_pid_all;
static int opt_userspace;
static char *opt_cmd_name;
static int opt_disable_all;
static pid_t opt_pid;

enum {
	OPT_HELP = 1,
	OPT_USERSPACE,
};

static struct lttng_handle *handle;

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_disable_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, &opt_cmd_name, 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},
	{0, 0, 0, 0, 0, 0, 0}
};

/*
 * usage
 */
static void usage(FILE *ofp)
{
	fprintf(ofp, "usage: lttng disable-event NAME[,NAME2,...] [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         Disable 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");
}

/*
 *  disable_events
 *
 *  Disabling event using the lttng API.
 */
static int disable_events(char *session_name)
{
	int err, ret = CMD_SUCCESS;
	char *event_name, *channel_name = NULL;
	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;
	}

	if (opt_kernel) {
		dom.type = LTTNG_DOMAIN_KERNEL;
	} else if (opt_pid != 0) {
		dom.type = LTTNG_DOMAIN_UST_PID;
		dom.attr.pid = opt_pid;
		DBG("PID %d set to lttng handle", opt_pid);
	} else if (opt_userspace && opt_cmd_name == NULL) {
		dom.type = LTTNG_DOMAIN_UST;
		DBG("UST global domain selected");
	} else if (opt_userspace && opt_cmd_name != NULL) {
		dom.type = LTTNG_DOMAIN_UST_EXEC_NAME;
		strncpy(dom.attr.exec_name, opt_cmd_name, NAME_MAX);
		dom.attr.exec_name[NAME_MAX - 1] = '\0';
	} else {
		ERR("Please specify a tracer (--kernel or --userspace)");
		ret = CMD_NOT_IMPLEMENTED;
		goto error;
	}

	handle = lttng_create_handle(session_name, &dom);
	if (handle == NULL) {
		ret = -1;
		goto error;
	}

	if (opt_disable_all) {
		ret = lttng_disable_event(handle, NULL, channel_name);
		if (ret < 0) {
			goto error;
		}

		MSG("All %s events are disabled in channel %s",
				opt_kernel ? "kernel" : "UST", channel_name);
		goto end;
	}

	/* Strip event list */
	event_name = strtok(opt_event_list, ",");
	while (event_name != NULL) {
		/* Kernel tracer action */
		if (opt_kernel) {
			DBG("Disabling kernel event %s in channel %s",
					event_name, channel_name);
		} else if (opt_userspace) {		/* User-space tracer action */
			if (!opt_pid_all) {
				MSG("Only supporting tracing all UST processes (-u --all) for now.");
				ret = CMD_NOT_IMPLEMENTED;
				goto error;
			}
			DBG("Disabling UST event %s in channel %s",
					event_name, channel_name);
		} else {
			ERR("Please specify a tracer (--kernel or --userspace)");
			goto error;
		}

		ret = lttng_disable_event(handle, event_name, channel_name);
		if (ret < 0) {
			MSG("Unable to disable %s event %s in channel %s",
					opt_kernel ? "kernel" : "UST", event_name,
					channel_name);
		} else {
			MSG("%s event %s disabled in channel %s",
					opt_kernel ? "kernel" : "UST", event_name,
					channel_name);
		}

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

end:
error:
	if (opt_channel_name == NULL) {
		free(channel_name);
	}
	lttng_destroy_handle(handle);

	return ret;
}

/*
 *  cmd_disable_events
 *
 *  Disable event to trace session
 */
int cmd_disable_events(int argc, const char **argv)
{
	int opt, ret;
	static poptContext pc;
	char *session_name = NULL;

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

	while ((opt = poptGetNextOpt(pc)) != -1) {
		switch (opt) {
		case OPT_HELP:
			usage(stderr);
			ret = CMD_SUCCESS;
			goto end;
		case OPT_USERSPACE:
			opt_userspace = 1;
			break;
		default:
			usage(stderr);
			ret = CMD_UNDEFINED;
			goto end;
		}
	}

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

	if (!opt_session_name) {
		session_name = get_session_name();
		if (session_name == NULL) {
			ret = -1;
			goto end;
		}
	} else {
		session_name = opt_session_name;
	}

	ret = disable_events(session_name);

end:
	return ret;
}
Commit	Line	Data
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
82a3637f DG	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
e953ef25 DG	32	static char *opt_event_list;
9730260e	33	static int opt_kernel;
e953ef25	34	static char *opt_channel_name;
5440dc42	35	static char *opt_session_name;
e953ef25 DG	36	static int opt_pid_all;
e953ef25 DG	37	static int opt_userspace;
eeac7d46	38	static char *opt_cmd_name;
e953ef25 DG	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;
cd80958d DG	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},
6caa2bcc	56	{"userspace", 'u', POPT_ARG_STRING \| POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
e953ef25 DG	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	71	fprintf(ofp, " -c, --channel Apply on this channel\n");
9730260e	72	fprintf(ofp, " -a, --all-events Disable all tracepoints\n");
e953ef25 DG	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	{
e953ef25 DG	87	int err, ret = CMD_SUCCESS;
b73d0b29	88	char event_name, channel_name = NULL;
7d29a247	89	struct lttng_domain dom;
e953ef25	90
e953ef25 DG	91	if (opt_channel_name == NULL) {
	92	err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
	93	if (err < 0) {
	94	ret = CMD_FATAL;
	95	goto error;
	96	}
	97	} else {
	98	channel_name = opt_channel_name;
	99	}
	100
7d29a247 DG	101	if (opt_kernel) {
7d29a247 DG	102	dom.type = LTTNG_DOMAIN_KERNEL;
9730260e DG	103	} else if (opt_pid != 0) {
	104	dom.type = LTTNG_DOMAIN_UST_PID;
	105	dom.attr.pid = opt_pid;
	106	DBG("PID %d set to lttng handle", opt_pid);
	107	} else if (opt_userspace && opt_cmd_name == NULL) {
	108	dom.type = LTTNG_DOMAIN_UST;
	109	DBG("UST global domain selected");
	110	} else if (opt_userspace && opt_cmd_name != NULL) {
	111	dom.type = LTTNG_DOMAIN_UST_EXEC_NAME;
	112	strncpy(dom.attr.exec_name, opt_cmd_name, NAME_MAX);
422138c8	113	dom.attr.exec_name[NAME_MAX - 1] = '\0';
9730260e DG	114	} else {
	115	ERR("Please specify a tracer (--kernel or --userspace)");
	116	ret = CMD_NOT_IMPLEMENTED;
	117	goto error;
7d29a247 DG	118	}
7d29a247 DG	119
cd80958d DG	120	handle = lttng_create_handle(session_name, &dom);
	121	if (handle == NULL) {
	122	ret = -1;
	123	goto error;
	124	}
	125
e953ef25	126	if (opt_disable_all) {
9730260e DG	127	ret = lttng_disable_event(handle, NULL, channel_name);
9730260e DG	128	if (ret < 0) {
e953ef25 DG	129	goto error;
	130	}
	131
9730260e DG	132	MSG("All %s events are disabled in channel %s",
	133	opt_kernel ? "kernel" : "UST", channel_name);
	134	goto end;
e953ef25 DG	135	}
	136
	137	/* Strip event list */
	138	event_name = strtok(opt_event_list, ",");
	139	while (event_name != NULL) {
	140	/* Kernel tracer action */
	141	if (opt_kernel) {
9730260e	142	DBG("Disabling kernel event %s in channel %s",
e953ef25	143	event_name, channel_name);
e953ef25	144	} else if (opt_userspace) { /* User-space tracer action */
9730260e DG	145	if (!opt_pid_all) {
	146	MSG("Only supporting tracing all UST processes (-u --all) for now.");
	147	ret = CMD_NOT_IMPLEMENTED;
	148	goto error;
e953ef25	149	}
9730260e DG	150	DBG("Disabling UST event %s in channel %s",
9730260e DG	151	event_name, channel_name);
e953ef25	152	} else {
048e2159	153	ERR("Please specify a tracer (--kernel or --userspace)");
e953ef25 DG	154	goto error;
	155	}
	156
9730260e DG	157	ret = lttng_disable_event(handle, event_name, channel_name);
	158	if (ret < 0) {
	159	MSG("Unable to disable %s event %s in channel %s",
	160	opt_kernel ? "kernel" : "UST", event_name,
	161	channel_name);
	162	} else {
	163	MSG("%s event %s disabled in channel %s",
	164	opt_kernel ? "kernel" : "UST", event_name,
	165	channel_name);
	166	}
	167
e953ef25 DG	168	/* Next event */
	169	event_name = strtok(NULL, ",");
	170	}
	171
9730260e	172	end:
e953ef25	173	error:
b73d0b29 MD	174	if (opt_channel_name == NULL) {
	175	free(channel_name);
	176	}
cd80958d DG	177	lttng_destroy_handle(handle);
cd80958d DG	178
e953ef25 DG	179	return ret;
	180	}
	181
	182	/*
	183	* cmd_disable_events
	184	*
	185	* Disable event to trace session
	186	*/
	187	int cmd_disable_events(int argc, const char **argv)
	188	{
	189	int opt, ret;
	190	static poptContext pc;
cd80958d	191	char *session_name = NULL;
e953ef25 DG	192
	193	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	194	poptReadDefaultConfig(pc, 0);
	195
	196	while ((opt = poptGetNextOpt(pc)) != -1) {
	197	switch (opt) {
	198	case OPT_HELP:
	199	usage(stderr);
	200	ret = CMD_SUCCESS;
	201	goto end;
	202	case OPT_USERSPACE:
	203	opt_userspace = 1;
e953ef25 DG	204	break;
	205	default:
	206	usage(stderr);
	207	ret = CMD_UNDEFINED;
	208	goto end;
	209	}
	210	}
	211
	212	opt_event_list = (char*) poptGetArg(pc);
	213	if (opt_event_list == NULL && opt_disable_all == 0) {
	214	ERR("Missing event name(s).\n");
	215	usage(stderr);
	216	ret = CMD_SUCCESS;
	217	goto end;
	218	}
	219
cd80958d DG	220	if (!opt_session_name) {
	221	session_name = get_session_name();
	222	if (session_name == NULL) {
	223	ret = -1;
	224	goto end;
	225	}
	226	} else {
	227	session_name = opt_session_name;
	228	}
	229
	230	ret = disable_events(session_name);
e953ef25 DG	231
	232	end:
	233	return ret;
	234	}