[lttng-tools.git] / src / common / sessiond-comm / sessiond-comm.c

/*
 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
 *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2 only,
 * as published by the Free Software Foundation.
 * 
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#define _GNU_SOURCE
#include <assert.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>

#include <common/defaults.h>
#include <common/error.h>

#include "sessiond-comm.h"

/* For Unix socket */
#include "unix.h"
/* For Inet socket */
#include "inet.h"
/* For Inet6 socket */
#include "inet6.h"

struct lttcomm_net_family net_families[] = {
	{ LTTCOMM_INET, lttcomm_create_inet_sock },
	{ LTTCOMM_INET6, lttcomm_create_inet6_sock },
};

/*
 * Human readable error message.
 */
static const char *lttcomm_readable_code[] = {
	[ LTTCOMM_ERR_INDEX(LTTCOMM_OK) ] = "Success",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_ERR) ] = "Unknown error",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UND) ] = "Undefined command",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_NOT_IMPLEMENTED) ] = "Not implemented",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UNKNOWN_DOMAIN) ] = "Unknown tracing domain",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_SESSION) ] = "No session found",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_LIST_FAIL) ] = "Unable to list traceable apps",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_APPS) ] = "No traceable apps found",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_SESS_NOT_FOUND) ] = "Session name not found",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_TRACE) ] = "No trace found",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_FATAL) ] = "Fatal error of the session daemon",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CREATE_DIR_FAIL) ] = "Create directory failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_START_FAIL) ] = "Start trace failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_STOP_FAIL) ] = "Stop trace failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_TRACEABLE) ] = "App is not traceable",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_SELECT_SESS) ] = "A session MUST be selected",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_EXIST_SESS) ] = "Session name already exist",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONNECT_FAIL) ] = "Unable to connect to Unix socket",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_APP_NOT_FOUND) ] = "Application not found",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_EPERM) ] = "Permission denied",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_NA) ] = "Kernel tracer not available",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_VERSION) ] = "Kernel tracer version is not compatible",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_EVENT_EXIST) ] = "Kernel event already exists",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_SESS_FAIL) ] = "Kernel create session failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_EXIST) ] = "Kernel channel already exists",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_FAIL) ] = "Kernel create channel failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_NOT_FOUND) ] = "Kernel channel not found",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_DISABLE_FAIL) ] = "Disable kernel channel failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_ENABLE_FAIL) ] = "Enable kernel channel failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CONTEXT_FAIL) ] = "Add kernel context failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_ENABLE_FAIL) ] = "Enable kernel event failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_DISABLE_FAIL) ] = "Disable kernel event failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_META_FAIL) ] = "Opening metadata failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_START_FAIL) ] = "Starting kernel trace failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_STOP_FAIL) ] = "Stoping kernel trace failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CONSUMER_FAIL) ] = "Kernel consumer start failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_STREAM_FAIL) ] = "Kernel create stream failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_DIR_FAIL) ] = "Kernel trace directory creation failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_DIR_EXIST) ] = "Kernel trace directory already exist",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_NO_SESSION) ] = "No kernel session found",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_LIST_FAIL) ] = "Listing kernel events failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CALIBRATE_FAIL) ] = "UST calibration failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_VERSION) ] = "UST tracer version is not compatible",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_SESS_FAIL) ] = "UST create session failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_FAIL) ] = "UST create channel failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_EXIST) ] = "UST channel already exist",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_NOT_FOUND) ] = "UST channel not found",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_DISABLE_FAIL) ] = "Disable UST channel failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_ENABLE_FAIL) ] = "Enable UST channel failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONTEXT_FAIL) ] = "Add UST context failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_ENABLE_FAIL) ] = "Enable UST event failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_DISABLE_FAIL) ] = "Disable UST event failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_META_FAIL) ] = "Opening metadata failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_START_FAIL) ] = "Starting UST trace failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_STOP_FAIL) ] = "Stoping UST trace failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONSUMER64_FAIL) ] = "64-bit UST consumer start failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONSUMER32_FAIL) ] = "32-bit UST consumer start failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_STREAM_FAIL) ] = "UST create stream failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_DIR_FAIL) ] = "UST trace directory creation failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_DIR_EXIST) ] = "UST trace directory already exist",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_NO_SESSION) ] = "No UST session found",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_LIST_FAIL) ] = "Listing UST events failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_EVENT_EXIST) ] = "UST event already exist",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_EVENT_NOT_FOUND)] = "UST event not found",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONTEXT_EXIST)] = "UST context already exist",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONTEXT_INVAL)] = "UST invalid context",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_NEED_ROOT_SESSIOND) ] = "Tracing the kernel requires a root lttng-sessiond daemon and \"tracing\" group user membership",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_TRACE_ALREADY_STARTED) ] = "Tracing already started",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_TRACE_ALREADY_STOPPED) ] = "Tracing already stopped",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_EVENT_ENOSYS) ] = "Kernel event type not supported",

	[ LTTCOMM_ERR_INDEX(CONSUMERD_COMMAND_SOCK_READY) ] = "consumerd command socket ready",
	[ LTTCOMM_ERR_INDEX(CONSUMERD_SUCCESS_RECV_FD) ] = "consumerd success on receiving fds",
	[ LTTCOMM_ERR_INDEX(CONSUMERD_ERROR_RECV_FD) ] = "consumerd error on receiving fds",
	[ LTTCOMM_ERR_INDEX(CONSUMERD_ERROR_RECV_CMD) ] = "consumerd error on receiving command",
	[ LTTCOMM_ERR_INDEX(CONSUMERD_POLL_ERROR) ] = "consumerd error in polling thread",
	[ LTTCOMM_ERR_INDEX(CONSUMERD_POLL_NVAL) ] = "consumerd polling on closed fd",
	[ LTTCOMM_ERR_INDEX(CONSUMERD_POLL_HUP) ] = "consumerd all fd hung up",
	[ LTTCOMM_ERR_INDEX(CONSUMERD_EXIT_SUCCESS) ] = "consumerd exiting normally",
	[ LTTCOMM_ERR_INDEX(CONSUMERD_EXIT_FAILURE) ] = "consumerd exiting on error",
	[ LTTCOMM_ERR_INDEX(CONSUMERD_OUTFD_ERROR) ] = "consumerd error opening the tracefile",
	[ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_EBADF) ] = "consumerd splice EBADF",
	[ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_EINVAL) ] = "consumerd splice EINVAL",
	[ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_ENOMEM) ] = "consumerd splice ENOMEM",
	[ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_ESPIPE) ] = "consumerd splice ESPIPE",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_EVENT) ] = "Event not found",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_INVALID) ] = "Invalid parameter",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_USTCONSUMERD) ] = "No UST consumer detected",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_KERNCONSUMERD) ] = "No kernel consumer detected",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_EVENT_EXIST_LOGLEVEL) ] = "Event already enabled with different loglevel",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_URI_DATA_MISS) ] = "Missing data path URI",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_URI_CTRL_MISS) ] = "Missing control data path URI",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_ENABLE_CONSUMER_FAIL) ] = "Enabling consumer failed",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_RELAYD_SESSION_FAIL) ] = "Unable to create session on lttng-relayd",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_RELAYD_VERSION_FAIL) ] = "Relay daemon not compatible",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_FILTER_INVAL) ] = "Invalid filter bytecode",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_FILTER_NOMEM) ] = "Not enough memory for filter bytecode",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_FILTER_EXIST) ] = "Filter already exist",
};

/*
 * Return ptr to string representing a human readable error code from the
 * lttcomm_return_code enum.
 *
 * These code MUST be negative in other to treat that as an error value.
 */
const char *lttcomm_get_readable_code(enum lttcomm_return_code code)
{
	int tmp_code = -code;

	if (tmp_code >= LTTCOMM_OK && tmp_code < LTTCOMM_NR) {
		return lttcomm_readable_code[LTTCOMM_ERR_INDEX(tmp_code)];
	}

	return "Unknown error code";
}

/*
 * Create socket from an already allocated lttcomm socket structure and init
 * sockaddr in the lttcomm sock.
 */
int lttcomm_create_sock(struct lttcomm_sock *sock)
{
	int ret, _sock_type, _sock_proto, domain;

	assert(sock);

	domain = sock->sockaddr.type;
	if (domain != LTTCOMM_INET && domain != LTTCOMM_INET6) {
		ERR("Create socket of unknown domain %d", domain);
		ret = -1;
		goto error;
	}

	switch (sock->proto) {
	case LTTCOMM_SOCK_UDP:
		_sock_type = SOCK_DGRAM;
		_sock_proto = IPPROTO_UDP;
		break;
	case LTTCOMM_SOCK_TCP:
		_sock_type = SOCK_STREAM;
		_sock_proto = IPPROTO_TCP;
		break;
	default:
		ret = -1;
		goto error;
	}

	ret = net_families[domain].create(sock, _sock_type, _sock_proto);
	if (ret < 0) {
		goto error;
	}

error:
	return ret;
}

/*
 * Return allocated lttcomm socket structure.
 */
struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto)
{
	struct lttcomm_sock *sock;

	sock = zmalloc(sizeof(struct lttcomm_sock));
	if (sock == NULL) {
		PERROR("zmalloc create sock");
		goto end;
	}

	sock->proto = proto;
	sock->fd = -1;

end:
	return sock;
}

/*
 * Return an allocated lttcomm socket structure and copy src content into
 * the newly created socket.
 *
 * This is mostly useful when lttcomm_sock are passed between process where the
 * fd and ops have to be changed within the correct address space.
 */
struct lttcomm_sock *lttcomm_alloc_copy_sock(struct lttcomm_sock *src)
{
	struct lttcomm_sock *sock;

	/* Safety net */
	assert(src);

	sock = lttcomm_alloc_sock(src->proto);
	if (sock == NULL) {
		goto alloc_error;
	}

	lttcomm_copy_sock(sock, src);

alloc_error:
	return sock;
}

/*
 * Create and copy socket from an allocated lttcomm socket structure.
 *
 * This is mostly useful when lttcomm_sock are passed between process where the
 * fd and ops have to be changed within the correct address space.
 */
void lttcomm_copy_sock(struct lttcomm_sock *dst, struct lttcomm_sock *src)
{
	/* Safety net */
	assert(dst);
	assert(src);

	dst->proto = src->proto;
	dst->fd = src->fd;
	dst->ops = src->ops;
	/* Copy sockaddr information from original socket */
	memcpy(&dst->sockaddr, &src->sockaddr, sizeof(dst->sockaddr));
}

/*
 * Init IPv4 sockaddr structure.
 */
int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
		const char *ip, unsigned int port)
{
	int ret;

	assert(sockaddr);
	assert(ip);
	assert(port > 0 && port <= 65535);

	memset(sockaddr, 0, sizeof(struct lttcomm_sockaddr));

	sockaddr->type = LTTCOMM_INET;
	sockaddr->addr.sin.sin_family = AF_INET;
	sockaddr->addr.sin.sin_port = htons(port);
	ret = inet_pton(sockaddr->addr.sin.sin_family, ip,
			&sockaddr->addr.sin.sin_addr);
	if (ret < 1) {
		ret = -1;
		ERR("%s with port %d: unrecognized IPv4 address", ip, port);
		goto error;
	}
	memset(sockaddr->addr.sin.sin_zero, 0, sizeof(sockaddr->addr.sin.sin_zero));

error:
	return ret;
}

/*
 * Init IPv6 sockaddr structure.
 */
int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
		const char *ip, unsigned int port)
{
	int ret;

	assert(sockaddr);
	assert(ip);
	assert(port > 0 && port <= 65535);

	memset(sockaddr, 0, sizeof(struct lttcomm_sockaddr));

	sockaddr->type = LTTCOMM_INET6;
	sockaddr->addr.sin6.sin6_family = AF_INET6;
	sockaddr->addr.sin6.sin6_port = htons(port);
	ret = inet_pton(sockaddr->addr.sin6.sin6_family, ip,
			&sockaddr->addr.sin6.sin6_addr);
	if (ret < 1) {
		ret = -1;
		goto error;
	}

error:
	return ret;
}

/*
 * Return allocated lttcomm socket structure from lttng URI.
 */
struct lttcomm_sock *lttcomm_alloc_sock_from_uri(struct lttng_uri *uri)
{
	int ret;
	int _sock_proto;
	struct lttcomm_sock *sock = NULL;

	/* Safety net */
	assert(uri);

	/* Check URI protocol */
	if (uri->proto == LTTNG_TCP) {
		_sock_proto = LTTCOMM_SOCK_TCP;
	} else {
		ERR("Relayd invalid URI proto: %d", uri->proto);
		goto alloc_error;
	}

	sock = lttcomm_alloc_sock(_sock_proto);
	if (sock == NULL) {
		goto alloc_error;
	}

	/* Check destination type */
	if (uri->dtype == LTTNG_DST_IPV4) {
		ret = lttcomm_init_inet_sockaddr(&sock->sockaddr, uri->dst.ipv4,
				uri->port);
		if (ret < 0) {
			goto error;
		}
	} else if (uri->dtype == LTTNG_DST_IPV6) {
		ret = lttcomm_init_inet6_sockaddr(&sock->sockaddr, uri->dst.ipv6,
				uri->port);
		if (ret < 0) {
			goto error;
		}
	} else {
		/* Command URI is invalid */
		ERR("Relayd invalid URI dst type: %d", uri->dtype);
		goto error;
	}

	return sock;

error:
	lttcomm_destroy_sock(sock);
alloc_error:
	return NULL;
}

/*
 * Destroy and free lttcomm socket.
 */
void lttcomm_destroy_sock(struct lttcomm_sock *sock)
{
	if (sock != NULL) {
		free(sock);
	}
}
Commit	Line	Data
826d496d	1	/*
917216f6 DG	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
917216f6 DG	3	* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
fac6795d	4	*
d14d33bf AM	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License, version 2 only,
	7	* as published by the Free Software Foundation.
fac6795d	8	*
917216f6 DG	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
fac6795d	13	*
d14d33bf AM	14	* You should have received a copy of the GNU General Public License along
	15	* with this program; if not, write to the Free Software Foundation, Inc.,
	16	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
fac6795d DG	17	*/
	18
	19	#define _GNU_SOURCE
1e307fab	20	#include <assert.h>
fac6795d DG	21	#include <limits.h>
	22	#include <stdio.h>
	23	#include <stdlib.h>
	24	#include <string.h>
fac6795d DG	25	#include <sys/stat.h>
fac6795d DG	26	#include <sys/types.h>
fac6795d	27	#include <unistd.h>
3bd1e081	28	#include <errno.h>
fac6795d	29
990570ed	30	#include <common/defaults.h>
4c462e79	31	#include <common/error.h>
990570ed	32
10a8a223	33	#include "sessiond-comm.h"
fac6795d	34
6364a07a DG	35	/* For Unix socket */
	36	#include "unix.h"
	37	/* For Inet socket */
	38	#include "inet.h"
	39	/* For Inet6 socket */
	40	#include "inet6.h"
	41
	42	struct lttcomm_net_family net_families[] = {
	43	{ LTTCOMM_INET, lttcomm_create_inet_sock },
	44	{ LTTCOMM_INET6, lttcomm_create_inet6_sock },
	45	};
	46
fac6795d DG	47	/*
	48	* Human readable error message.
	49	*/
	50	static const char *lttcomm_readable_code[] = {
	51	[ LTTCOMM_ERR_INDEX(LTTCOMM_OK) ] = "Success",
	52	[ LTTCOMM_ERR_INDEX(LTTCOMM_ERR) ] = "Unknown error",
	53	[ LTTCOMM_ERR_INDEX(LTTCOMM_UND) ] = "Undefined command",
7d29a247 DG	54	[ LTTCOMM_ERR_INDEX(LTTCOMM_NOT_IMPLEMENTED) ] = "Not implemented",
7d29a247 DG	55	[ LTTCOMM_ERR_INDEX(LTTCOMM_UNKNOWN_DOMAIN) ] = "Unknown tracing domain",
fac6795d DG	56	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_SESSION) ] = "No session found",
fac6795d DG	57	[ LTTCOMM_ERR_INDEX(LTTCOMM_LIST_FAIL) ] = "Unable to list traceable apps",
e065084a	58	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_APPS) ] = "No traceable apps found",
f3ed775e	59	[ LTTCOMM_ERR_INDEX(LTTCOMM_SESS_NOT_FOUND) ] = "Session name not found",
ce3d728c	60	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_TRACE) ] = "No trace found",
ca95a216	61	[ LTTCOMM_ERR_INDEX(LTTCOMM_FATAL) ] = "Fatal error of the session daemon",
ae856491	62	[ LTTCOMM_ERR_INDEX(LTTCOMM_CREATE_DIR_FAIL) ] = "Create directory failed",
379473d2	63	[ LTTCOMM_ERR_INDEX(LTTCOMM_START_FAIL) ] = "Start trace failed",
520ff687	64	[ LTTCOMM_ERR_INDEX(LTTCOMM_STOP_FAIL) ] = "Stop trace failed",
379473d2 DG	65	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_TRACEABLE) ] = "App is not traceable",
379473d2 DG	66	[ LTTCOMM_ERR_INDEX(LTTCOMM_SELECT_SESS) ] = "A session MUST be selected",
27673bb6	67	[ LTTCOMM_ERR_INDEX(LTTCOMM_EXIST_SESS) ] = "Session name already exist",
d9800920	68	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONNECT_FAIL) ] = "Unable to connect to Unix socket",
2b0bf864	69	[ LTTCOMM_ERR_INDEX(LTTCOMM_APP_NOT_FOUND) ] = "Application not found",
8e0af1b4	70	[ LTTCOMM_ERR_INDEX(LTTCOMM_EPERM) ] = "Permission denied",
20fe2104	71	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_NA) ] = "Kernel tracer not available",
394016d1	72	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_VERSION) ] = "Kernel tracer version is not compatible",
7d29a247	73	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_EVENT_EXIST) ] = "Kernel event already exists",
20fe2104	74	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_SESS_FAIL) ] = "Kernel create session failed",
42224349	75	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_EXIST) ] = "Kernel channel already exists",
20fe2104	76	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_FAIL) ] = "Kernel create channel failed",
f3ed775e	77	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_NOT_FOUND) ] = "Kernel channel not found",
26cc6b4e	78	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_DISABLE_FAIL) ] = "Disable kernel channel failed",
d36b8583	79	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_ENABLE_FAIL) ] = "Enable kernel channel failed",
d65106b1	80	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CONTEXT_FAIL) ] = "Add kernel context failed",
f34daff7 DG	81	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_ENABLE_FAIL) ] = "Enable kernel event failed",
f34daff7 DG	82	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_DISABLE_FAIL) ] = "Disable kernel event failed",
aaf26714	83	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_META_FAIL) ] = "Opening metadata failed",
8c0faa1d DG	84	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_START_FAIL) ] = "Starting kernel trace failed",
	85	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_STOP_FAIL) ] = "Stoping kernel trace failed",
	86	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CONSUMER_FAIL) ] = "Kernel consumer start failed",
	87	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_STREAM_FAIL) ] = "Kernel create stream failed",
	88	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_DIR_FAIL) ] = "Kernel trace directory creation failed",
	89	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_DIR_EXIST) ] = "Kernel trace directory already exist",
84291629	90	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_NO_SESSION) ] = "No kernel session found",
2ef84c95	91	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_LIST_FAIL) ] = "Listing kernel events failed",
4466912f	92	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CALIBRATE_FAIL) ] = "UST calibration failed",
e0c7ec2b	93	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_VERSION) ] = "UST tracer version is not compatible",
0177d773	94	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_SESS_FAIL) ] = "UST create session failed",
2b0bf864	95	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_FAIL) ] = "UST create channel failed",
f6a9efaa	96	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_EXIST) ] = "UST channel already exist",
2bdd86d4 MD	97	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_NOT_FOUND) ] = "UST channel not found",
	98	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_DISABLE_FAIL) ] = "Disable UST channel failed",
	99	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_ENABLE_FAIL) ] = "Enable UST channel failed",
	100	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONTEXT_FAIL) ] = "Add UST context failed",
	101	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_ENABLE_FAIL) ] = "Enable UST event failed",
	102	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_DISABLE_FAIL) ] = "Disable UST event failed",
	103	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_META_FAIL) ] = "Opening metadata failed",
	104	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_START_FAIL) ] = "Starting UST trace failed",
	105	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_STOP_FAIL) ] = "Stoping UST trace failed",
7753dea8 MD	106	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONSUMER64_FAIL) ] = "64-bit UST consumer start failed",
7753dea8 MD	107	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONSUMER32_FAIL) ] = "32-bit UST consumer start failed",
2bdd86d4 MD	108	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_STREAM_FAIL) ] = "UST create stream failed",
	109	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_DIR_FAIL) ] = "UST trace directory creation failed",
	110	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_DIR_EXIST) ] = "UST trace directory already exist",
	111	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_NO_SESSION) ] = "No UST session found",
	112	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_LIST_FAIL) ] = "Listing UST events failed",
3b25d04d	113	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_EVENT_EXIST) ] = "UST event already exist",
be4f0921	114	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_EVENT_NOT_FOUND)] = "UST event not found",
ae357384	115	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONTEXT_EXIST)] = "UST context already exist",
ae856491	116	[ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONTEXT_INVAL)] = "UST invalid context",
30905cf4	117	[ LTTCOMM_ERR_INDEX(LTTCOMM_NEED_ROOT_SESSIOND) ] = "Tracing the kernel requires a root lttng-sessiond daemon and \"tracing\" group user membership",
80e327fa DG	118	[ LTTCOMM_ERR_INDEX(LTTCOMM_TRACE_ALREADY_STARTED) ] = "Tracing already started",
80e327fa DG	119	[ LTTCOMM_ERR_INDEX(LTTCOMM_TRACE_ALREADY_STOPPED) ] = "Tracing already stopped",
bd29c13d	120	[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_EVENT_ENOSYS) ] = "Kernel event type not supported",
80e327fa	121
3bd1e081 MD	122	[ LTTCOMM_ERR_INDEX(CONSUMERD_COMMAND_SOCK_READY) ] = "consumerd command socket ready",
	123	[ LTTCOMM_ERR_INDEX(CONSUMERD_SUCCESS_RECV_FD) ] = "consumerd success on receiving fds",
	124	[ LTTCOMM_ERR_INDEX(CONSUMERD_ERROR_RECV_FD) ] = "consumerd error on receiving fds",
f2fc6720	125	[ LTTCOMM_ERR_INDEX(CONSUMERD_ERROR_RECV_CMD) ] = "consumerd error on receiving command",
3bd1e081 MD	126	[ LTTCOMM_ERR_INDEX(CONSUMERD_POLL_ERROR) ] = "consumerd error in polling thread",
	127	[ LTTCOMM_ERR_INDEX(CONSUMERD_POLL_NVAL) ] = "consumerd polling on closed fd",
	128	[ LTTCOMM_ERR_INDEX(CONSUMERD_POLL_HUP) ] = "consumerd all fd hung up",
	129	[ LTTCOMM_ERR_INDEX(CONSUMERD_EXIT_SUCCESS) ] = "consumerd exiting normally",
	130	[ LTTCOMM_ERR_INDEX(CONSUMERD_EXIT_FAILURE) ] = "consumerd exiting on error",
	131	[ LTTCOMM_ERR_INDEX(CONSUMERD_OUTFD_ERROR) ] = "consumerd error opening the tracefile",
	132	[ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_EBADF) ] = "consumerd splice EBADF",
	133	[ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_EINVAL) ] = "consumerd splice EINVAL",
	134	[ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_ENOMEM) ] = "consumerd splice ENOMEM",
	135	[ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_ESPIPE) ] = "consumerd splice ESPIPE",
d65106b1	136	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_EVENT) ] = "Event not found",
b024d072	137	[ LTTCOMM_ERR_INDEX(LTTCOMM_INVALID) ] = "Invalid parameter",
5c827ce0 DG	138	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_USTCONSUMERD) ] = "No UST consumer detected",
5c827ce0 DG	139	[ LTTCOMM_ERR_INDEX(LTTCOMM_NO_KERNCONSUMERD) ] = "No kernel consumer detected",
a027b2d2	140	[ LTTCOMM_ERR_INDEX(LTTCOMM_EVENT_EXIST_LOGLEVEL) ] = "Event already enabled with different loglevel",
de5e9086 DG	141	[ LTTCOMM_ERR_INDEX(LTTCOMM_URI_DATA_MISS) ] = "Missing data path URI",
	142	[ LTTCOMM_ERR_INDEX(LTTCOMM_URI_CTRL_MISS) ] = "Missing control data path URI",
	143	[ LTTCOMM_ERR_INDEX(LTTCOMM_ENABLE_CONSUMER_FAIL) ] = "Enabling consumer failed",
	144	[ LTTCOMM_ERR_INDEX(LTTCOMM_RELAYD_SESSION_FAIL) ] = "Unable to create session on lttng-relayd",
	145	[ LTTCOMM_ERR_INDEX(LTTCOMM_RELAYD_VERSION_FAIL) ] = "Relay daemon not compatible",
53a80697 MD	146	[ LTTCOMM_ERR_INDEX(LTTCOMM_FILTER_INVAL) ] = "Invalid filter bytecode",
	147	[ LTTCOMM_ERR_INDEX(LTTCOMM_FILTER_NOMEM) ] = "Not enough memory for filter bytecode",
	148	[ LTTCOMM_ERR_INDEX(LTTCOMM_FILTER_EXIST) ] = "Filter already exist",
fac6795d DG	149	};
	150
	151	/*
917216f6 DG	152	* Return ptr to string representing a human readable error code from the
917216f6 DG	153	* lttcomm_return_code enum.
fac6795d	154	*
917216f6	155	* These code MUST be negative in other to treat that as an error value.
fac6795d DG	156	*/
	157	const char *lttcomm_get_readable_code(enum lttcomm_return_code code)
	158	{
	159	int tmp_code = -code;
	160
	161	if (tmp_code >= LTTCOMM_OK && tmp_code < LTTCOMM_NR) {
	162	return lttcomm_readable_code[LTTCOMM_ERR_INDEX(tmp_code)];
	163	}
	164
	165	return "Unknown error code";
	166	}
6364a07a DG	167
6364a07a DG	168	/*
de5e9086 DG	169	* Create socket from an already allocated lttcomm socket structure and init
de5e9086 DG	170	* sockaddr in the lttcomm sock.
6364a07a	171	*/
de5e9086	172	int lttcomm_create_sock(struct lttcomm_sock *sock)
6364a07a	173	{
de5e9086	174	int ret, _sock_type, _sock_proto, domain;
6364a07a	175
de5e9086 DG	176	assert(sock);
	177
	178	domain = sock->sockaddr.type;
	179	if (domain != LTTCOMM_INET && domain != LTTCOMM_INET6) {
	180	ERR("Create socket of unknown domain %d", domain);
	181	ret = -1;
	182	goto error;
6364a07a DG	183	}
6364a07a DG	184
de5e9086 DG	185	switch (sock->proto) {
	186	case LTTCOMM_SOCK_UDP:
	187	_sock_type = SOCK_DGRAM;
	188	_sock_proto = IPPROTO_UDP;
	189	break;
	190	case LTTCOMM_SOCK_TCP:
	191	_sock_type = SOCK_STREAM;
	192	_sock_proto = IPPROTO_TCP;
	193	break;
	194	default:
	195	ret = -1;
	196	goto error;
	197	}
6364a07a	198
de5e9086 DG	199	ret = net_families[domain].create(sock, _sock_type, _sock_proto);
	200	if (ret < 0) {
	201	goto error;
	202	}
	203
	204	error:
	205	return ret;
6364a07a DG	206	}
	207
	208	/*
de5e9086	209	* Return allocated lttcomm socket structure.
6364a07a	210	*/
de5e9086	211	struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto)
6364a07a	212	{
de5e9086	213	struct lttcomm_sock *sock;
6364a07a	214
de5e9086 DG	215	sock = zmalloc(sizeof(struct lttcomm_sock));
	216	if (sock == NULL) {
	217	PERROR("zmalloc create sock");
	218	goto end;
6364a07a DG	219	}
	220
	221	sock->proto = proto;
de5e9086	222	sock->fd = -1;
6364a07a	223
de5e9086 DG	224	end:
de5e9086 DG	225	return sock;
6364a07a DG	226	}
	227
	228	/*
de5e9086 DG	229	* Return an allocated lttcomm socket structure and copy src content into
	230	* the newly created socket.
	231	*
	232	* This is mostly useful when lttcomm_sock are passed between process where the
	233	* fd and ops have to be changed within the correct address space.
6364a07a	234	*/
de5e9086	235	struct lttcomm_sock lttcomm_alloc_copy_sock(struct lttcomm_sock src)
6364a07a	236	{
6364a07a DG	237	struct lttcomm_sock *sock;
6364a07a DG	238
de5e9086 DG	239	/* Safety net */
	240	assert(src);
	241
	242	sock = lttcomm_alloc_sock(src->proto);
6364a07a DG	243	if (sock == NULL) {
	244	goto alloc_error;
	245	}
	246
de5e9086	247	lttcomm_copy_sock(sock, src);
6364a07a	248
de5e9086	249	alloc_error:
6364a07a	250	return sock;
de5e9086	251	}
6364a07a	252
de5e9086 DG	253	/*
	254	* Create and copy socket from an allocated lttcomm socket structure.
	255	*
	256	* This is mostly useful when lttcomm_sock are passed between process where the
	257	* fd and ops have to be changed within the correct address space.
	258	*/
	259	void lttcomm_copy_sock(struct lttcomm_sock dst, struct lttcomm_sock src)
	260	{
	261	/* Safety net */
	262	assert(dst);
	263	assert(src);
	264
	265	dst->proto = src->proto;
	266	dst->fd = src->fd;
	267	dst->ops = src->ops;
	268	/* Copy sockaddr information from original socket */
	269	memcpy(&dst->sockaddr, &src->sockaddr, sizeof(dst->sockaddr));
6364a07a DG	270	}
	271
	272	/*
	273	* Init IPv4 sockaddr structure.
	274	*/
	275	int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
	276	const char *ip, unsigned int port)
	277	{
	278	int ret;
	279
	280	assert(sockaddr);
	281	assert(ip);
	282	assert(port > 0 && port <= 65535);
	283
	284	memset(sockaddr, 0, sizeof(struct lttcomm_sockaddr));
	285
	286	sockaddr->type = LTTCOMM_INET;
	287	sockaddr->addr.sin.sin_family = AF_INET;
	288	sockaddr->addr.sin.sin_port = htons(port);
	289	ret = inet_pton(sockaddr->addr.sin.sin_family, ip,
	290	&sockaddr->addr.sin.sin_addr);
	291	if (ret < 1) {
	292	ret = -1;
de5e9086	293	ERR("%s with port %d: unrecognized IPv4 address", ip, port);
6364a07a DG	294	goto error;
	295	}
	296	memset(sockaddr->addr.sin.sin_zero, 0, sizeof(sockaddr->addr.sin.sin_zero));
	297
	298	error:
	299	return ret;
	300	}
	301
	302	/*
	303	* Init IPv6 sockaddr structure.
	304	*/
	305	int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
	306	const char *ip, unsigned int port)
	307	{
	308	int ret;
	309
	310	assert(sockaddr);
	311	assert(ip);
	312	assert(port > 0 && port <= 65535);
	313
	314	memset(sockaddr, 0, sizeof(struct lttcomm_sockaddr));
	315
	316	sockaddr->type = LTTCOMM_INET6;
	317	sockaddr->addr.sin6.sin6_family = AF_INET6;
	318	sockaddr->addr.sin6.sin6_port = htons(port);
	319	ret = inet_pton(sockaddr->addr.sin6.sin6_family, ip,
	320	&sockaddr->addr.sin6.sin6_addr);
	321	if (ret < 1) {
	322	ret = -1;
	323	goto error;
	324	}
	325
	326	error:
	327	return ret;
	328	}
de5e9086 DG	329
	330	/*
	331	* Return allocated lttcomm socket structure from lttng URI.
	332	*/
	333	struct lttcomm_sock lttcomm_alloc_sock_from_uri(struct lttng_uri uri)
	334	{
	335	int ret;
	336	int _sock_proto;
	337	struct lttcomm_sock *sock = NULL;
	338
	339	/* Safety net */
	340	assert(uri);
	341
	342	/* Check URI protocol */
	343	if (uri->proto == LTTNG_TCP) {
	344	_sock_proto = LTTCOMM_SOCK_TCP;
	345	} else {
	346	ERR("Relayd invalid URI proto: %d", uri->proto);
	347	goto alloc_error;
	348	}
	349
	350	sock = lttcomm_alloc_sock(_sock_proto);
	351	if (sock == NULL) {
	352	goto alloc_error;
	353	}
	354
	355	/* Check destination type */
	356	if (uri->dtype == LTTNG_DST_IPV4) {
	357	ret = lttcomm_init_inet_sockaddr(&sock->sockaddr, uri->dst.ipv4,
	358	uri->port);
	359	if (ret < 0) {
	360	goto error;
	361	}
	362	} else if (uri->dtype == LTTNG_DST_IPV6) {
	363	ret = lttcomm_init_inet6_sockaddr(&sock->sockaddr, uri->dst.ipv6,
	364	uri->port);
	365	if (ret < 0) {
	366	goto error;
	367	}
	368	} else {
	369	/* Command URI is invalid */
	370	ERR("Relayd invalid URI dst type: %d", uri->dtype);
	371	goto error;
	372	}
	373
	374	return sock;
	375
	376	error:
	377	lttcomm_destroy_sock(sock);
	378	alloc_error:
	379	return NULL;
	380	}
	381
	382	/*
	383	* Destroy and free lttcomm socket.
	384	*/
	385	void lttcomm_destroy_sock(struct lttcomm_sock *sock)
	386	{
	387	if (sock != NULL) {
	388	free(sock);
	389	}
	390	}