[thirdparty/mdadm.git] / mdmon.c


/*
 * md array manager.
 * When md arrays have user-space managed metadata, this is the program
 * that does the managing.
 *
 * Given one argument: the name of the array (e.g. /dev/md0) that is
 * the container.
 * We fork off a helper that runs high priority and mlocked.  It responds to
 * device failures and other events that might stop writeout, or that are
 * trivial to deal with.
 * The main thread then watches for new arrays being created in the container
 * and starts monitoring them too ... along with a few other tasks.
 *
 * The main thread communicates with the priority thread by writing over
 * a pipe.
 * Separate programs can communicate with the main thread via Unix-domain
 * socket.
 * The two threads share address space and open file table.
 *
 */

#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include	<unistd.h>
#include	<stdlib.h>
#include	<sys/types.h>
#include	<sys/stat.h>
#include	<sys/socket.h>
#include	<sys/un.h>
#include	<sys/mman.h>
#include	<sys/syscall.h>
#include	<sys/wait.h>
#include	<stdio.h>
#include	<errno.h>
#include	<string.h>
#include	<fcntl.h>
#include	<signal.h>

#include	<sched.h>

#include	"mdadm.h"
#include	"mdmon.h"

struct active_array *discard_this;
struct active_array *pending_discard;

int mon_tid, mgr_tid;

int sigterm;

int run_child(void *v)
{
	struct supertype *c = v;

	do_monitor(c);
	return 0;
}

int clone_monitor(struct supertype *container)
{
	static char stack[4096];

	mon_tid = clone(run_child, stack+4096-64,
		   CLONE_FS|CLONE_FILES|CLONE_VM|CLONE_SIGHAND|CLONE_THREAD,
		   container);

	mgr_tid = syscall(SYS_gettid);

	return mon_tid;
}

static struct superswitch *find_metadata_methods(char *vers)
{
	if (strcmp(vers, "ddf") == 0)
		return &super_ddf;
	if (strcmp(vers, "imsm") == 0)
		return &super_imsm;
	return NULL;
}


int make_pidfile(char *devname, int o_excl)
{
	char path[100];
	char pid[10];
	int fd;
	int n;

	if (sigterm)
		return -1;

	sprintf(path, "/var/run/mdadm/%s.pid", devname);

	fd = open(path, O_RDWR|O_CREAT|o_excl, 0600);
	if (fd < 0)
		return -errno;
	sprintf(pid, "%d\n", getpid());
	n = write(fd, pid, strlen(pid));
	close(fd);
	if (n < 0)
		return -errno;
	return 0;
}

static void try_kill_monitor(char *devname)
{
	char buf[100];
	int fd;
	pid_t pid;

	sprintf(buf, "/var/run/mdadm/%s.pid", devname);
	fd = open(buf, O_RDONLY);
	if (fd < 0)
		return;

	if (read(fd, buf, sizeof(buf)) < 0) {
		close(fd);
		return;
	}

	close(fd);
	pid = strtoul(buf, NULL, 10);

	/* kill this process if it is mdmon */
	sprintf(buf, "/proc/%lu/cmdline", (unsigned long) pid);
	fd = open(buf, O_RDONLY);
	if (fd < 0)
		return;

	if (read(fd, buf, sizeof(buf)) < 0) {
		close(fd);
		return;
	}

	if (strstr(buf, "mdmon") != NULL)
		kill(pid, SIGTERM);
}

void remove_pidfile(char *devname)
{
	char buf[100];

	if (sigterm)
		return;

	sprintf(buf, "/var/run/mdadm/%s.pid", devname);
	unlink(buf);
	sprintf(buf, "/var/run/mdadm/%s.sock", devname);
	unlink(buf);
}

int make_control_sock(char *devname)
{
	char path[100];
	int sfd;
	long fl;
	struct sockaddr_un addr;

	if (sigterm)
		return -1;

	sprintf(path, "/var/run/mdadm/%s.sock", devname);
	unlink(path);
	sfd = socket(PF_LOCAL, SOCK_STREAM, 0);
	if (sfd < 0)
		return -1;

	addr.sun_family = PF_LOCAL;
	strcpy(addr.sun_path, path);
	if (bind(sfd, &addr, sizeof(addr)) < 0) {
		close(sfd);
		return -1;
	}
	listen(sfd, 10);
	fl = fcntl(sfd, F_GETFL, 0);
	fl |= O_NONBLOCK;
	fcntl(sfd, F_SETFL, fl);
	return sfd;
}

int socket_hup_requested;
static void hup(int sig)
{
	socket_hup_requested = 1;
}

static void term(int sig)
{
	sigterm = 1;
}

static void wake_me(int sig)
{

}

/* if we are debugging and starting mdmon by hand then don't fork */
static int do_fork(void)
{
	#ifdef DEBUG
	if (env_no_mdmon())
		return 0;
	#endif

	return 1;
}


int main(int argc, char *argv[])
{
	int mdfd;
	struct mdinfo *mdi, *di;
	struct supertype *container;
	sigset_t set;
	struct sigaction act;
	int pfd[2];
	int status;
	int ignore;

	if (argc != 2) {
		fprintf(stderr, "Usage: md-manage /device/name/for/container\n");
		exit(2);
	}
	mdfd = open(argv[1], O_RDWR);
	if (mdfd < 0) {
		fprintf(stderr, "md-manage: %s: %s\n", argv[1],
			strerror(errno));
		exit(1);
	}
	if (md_get_version(mdfd) < 0) {
		fprintf(stderr, "md-manage: %s: Not an md device\n",
			argv[1]);
		exit(1);
	}

	/* Fork, and have the child tell us when they are ready */
	if (do_fork()) {
		if (pipe(pfd) != 0) {
			fprintf(stderr, "mdmon: failed to create pipe\n");
			exit(1);
		}
		switch(fork()) {
		case -1:
			fprintf(stderr, "mdmon: failed to fork: %s\n",
				strerror(errno));
			exit(1);
		case 0: /* child */
			close(pfd[0]);
			break;
		default: /* parent */
			close(pfd[1]);
			if (read(pfd[0], &status, sizeof(status)) != sizeof(status)) {
				wait(&status);
				status = WEXITSTATUS(status);
			}
			exit(status);
		}
	} else
		pfd[0] = pfd[1] = -1;
	/* hopefully it is a container - we'll check later */

	container = malloc(sizeof(*container));
	container->devnum = fd2devnum(mdfd);
	container->devname = devnum2devname(container->devnum);
	container->device_name = argv[1];

	/* If this fails, we hope it already exists */
	mkdir("/var/run/mdadm", 0600);
	/* pid file lives in /var/run/mdadm/mdXX.pid */
	if (make_pidfile(container->devname, O_EXCL) < 0) {
		if (ping_monitor(container->devname) == 0) {
			fprintf(stderr, "mdmon: %s already managed\n",
				container->devname);
			exit(3);
		} else {
			int err;

			/* cleanup the old monitor, this one is taking over */
			try_kill_monitor(container->devname);
			err = make_pidfile(container->devname, 0);
			if (err < 0) {
				fprintf(stderr, "mdmon: %s Cannot create pidfile\n",
					container->devname);
				if (err == -EROFS) {
					/* FIXME implement a mechanism to
					 * prevent duplicate monitor instances
					 */
					fprintf(stderr,
						"mdmon: continuing on read-only file system\n");
				} else
					exit(3);
			}
		}
	}

	container->sock = make_control_sock(container->devname);
	container->arrays = NULL;

	mdi = sysfs_read(mdfd, container->devnum,
			 GET_VERSION|GET_LEVEL|GET_DEVS);

	if (!mdi) {
		fprintf(stderr, "mdmon: failed to load sysfs info for %s\n",
			container->devname);
		exit(3);
	}
	if (mdi->array.level != UnSet) {
		fprintf(stderr, "mdmon: %s is not a container - cannot monitor\n",
			argv[1]);
		exit(3);
	}
	if (mdi->array.major_version != -1 ||
	    mdi->array.minor_version != -2) {
		fprintf(stderr, "mdmon: %s does not use external metadata - cannot monitor\n",
			argv[1]);
		exit(3);
	}

	container->ss = find_metadata_methods(mdi->text_version);
	if (container->ss == NULL) {
		fprintf(stderr, "mdmon: %s uses unknown metadata: %s\n",
			argv[1], mdi->text_version);
		exit(3);
	}

	container->devs = NULL;
	for (di = mdi->devs; di; di = di->next) {
		struct mdinfo *cd = malloc(sizeof(*cd));
		*cd = *di;
		cd->next = container->devs;
		container->devs = cd;
	}
	sysfs_free(mdi);


	if (container->ss->load_super(container, mdfd, argv[1])) {
		fprintf(stderr, "mdmon: Cannot load metadata for %s\n",
			argv[1]);
		exit(3);
	}

	/* Ok, this is close enough.  We can say goodbye to our parent now.
	 */
	status = 0;
	if (write(pfd[1], &status, sizeof(status)) < 0)
		fprintf(stderr, "mdmon: failed to notify our parent: %d\n",
			getppid());
	close(pfd[1]);

	ignore = chdir("/");
	setsid();
	close(0);
	open("/dev/null", O_RDWR);
	close(1);
	ignore = dup(0);
#ifndef DEBUG
	close(2);
	ignore = dup(0);
#endif

	mlockall(MCL_FUTURE);

	/* SIGUSR is sent between parent and child.  So both block it
	 * and enable it only with pselect.
	 */
	sigemptyset(&set);
	sigaddset(&set, SIGUSR1);
	sigaddset(&set, SIGHUP);
	sigaddset(&set, SIGALRM);
	sigaddset(&set, SIGTERM);
	sigprocmask(SIG_BLOCK, &set, NULL);
	act.sa_handler = wake_me;
	act.sa_flags = 0;
	sigaction(SIGUSR1, &act, NULL);
	sigaction(SIGALRM, &act, NULL);
	act.sa_handler = hup;
	sigaction(SIGHUP, &act, NULL);
	act.sa_handler = term;
	sigaction(SIGTERM, &act, NULL);
	act.sa_handler = SIG_IGN;
	sigaction(SIGPIPE, &act, NULL);

	if (clone_monitor(container) < 0) {
		fprintf(stderr, "mdmon: failed to start monitor process: %s\n",
			strerror(errno));
		exit(2);
	}

	do_manager(container);

	exit(0);
}
Commit	Line	Data
549e9569 NB	1
	2	/*
	3	* md array manager.
	4	* When md arrays have user-space managed metadata, this is the program
	5	* that does the managing.
	6	*
	7	* Given one argument: the name of the array (e.g. /dev/md0) that is
	8	* the container.
	9	* We fork off a helper that runs high priority and mlocked. It responds to
	10	* device failures and other events that might stop writeout, or that are
	11	* trivial to deal with.
	12	* The main thread then watches for new arrays being created in the container
	13	* and starts monitoring them too ... along with a few other tasks.
	14	*
	15	* The main thread communicates with the priority thread by writing over
	16	* a pipe.
	17	* Separate programs can communicate with the main thread via Unix-domain
	18	* socket.
	19	* The two threads share address space and open file table.
	20	*
	21	*/
	22
	23	#ifndef _GNU_SOURCE
	24	#define _GNU_SOURCE
	25	#endif
	26
	27	#include <unistd.h>
	28	#include <stdlib.h>
4d43913c	29	#include <sys/types.h>
549e9569 NB	30	#include <sys/stat.h>
	31	#include <sys/socket.h>
	32	#include <sys/un.h>
	33	#include <sys/mman.h>
4d43913c	34	#include <sys/syscall.h>
9fe32043	35	#include <sys/wait.h>
549e9569 NB	36	#include <stdio.h>
	37	#include <errno.h>
	38	#include <string.h>
	39	#include <fcntl.h>
b109d928	40	#include <signal.h>
549e9569 NB	41
	42	#include <sched.h>
	43
	44	#include "mdadm.h"
	45	#include "mdmon.h"
	46
549e9569 NB	47	struct active_array *discard_this;
549e9569 NB	48	struct active_array *pending_discard;
4d43913c NB	49
4d43913c NB	50	int mon_tid, mgr_tid;
549e9569	51
6144ed44 DW	52	int sigterm;
6144ed44 DW	53
549e9569 NB	54	int run_child(void *v)
	55	{
	56	struct supertype *c = v;
1ed3f387	57
549e9569 NB	58	do_monitor(c);
	59	return 0;
	60	}
	61
	62	int clone_monitor(struct supertype *container)
	63	{
549e9569	64	static char stack[4096];
549e9569	65
2cc98f9e	66	mon_tid = clone(run_child, stack+4096-64,
549e9569 NB	67	CLONE_FS\|CLONE_FILES\|CLONE_VM\|CLONE_SIGHAND\|CLONE_THREAD,
549e9569 NB	68	container);
3e70c845	69
4d43913c	70	mgr_tid = syscall(SYS_gettid);
2cc98f9e DW	71
2cc98f9e DW	72	return mon_tid;
549e9569 NB	73	}
	74
	75	static struct superswitch find_metadata_methods(char vers)
	76	{
	77	if (strcmp(vers, "ddf") == 0)
	78	return &super_ddf;
5b65005f DW	79	if (strcmp(vers, "imsm") == 0)
5b65005f DW	80	return &super_imsm;
549e9569 NB	81	return NULL;
	82	}
	83
	84
295646b3	85	int make_pidfile(char *devname, int o_excl)
549e9569 NB	86	{
	87	char path[100];
	88	char pid[10];
	89	int fd;
3d2c4fc7 DW	90	int n;
3d2c4fc7 DW	91
6144ed44 DW	92	if (sigterm)
	93	return -1;
	94
549e9569 NB	95	sprintf(path, "/var/run/mdadm/%s.pid", devname);
549e9569 NB	96
b109d928	97	fd = open(path, O_RDWR\|O_CREAT\|o_excl, 0600);
549e9569	98	if (fd < 0)
295646b3	99	return -errno;
549e9569	100	sprintf(pid, "%d\n", getpid());
3d2c4fc7	101	n = write(fd, pid, strlen(pid));
549e9569	102	close(fd);
3d2c4fc7 DW	103	if (n < 0)
3d2c4fc7 DW	104	return -errno;
549e9569 NB	105	return 0;
	106	}
	107
b109d928 DW	108	static void try_kill_monitor(char *devname)
	109	{
	110	char buf[100];
	111	int fd;
	112	pid_t pid;
	113
	114	sprintf(buf, "/var/run/mdadm/%s.pid", devname);
	115	fd = open(buf, O_RDONLY);
	116	if (fd < 0)
	117	return;
	118
	119	if (read(fd, buf, sizeof(buf)) < 0) {
	120	close(fd);
	121	return;
	122	}
	123
	124	close(fd);
	125	pid = strtoul(buf, NULL, 10);
	126
	127	/* kill this process if it is mdmon */
	128	sprintf(buf, "/proc/%lu/cmdline", (unsigned long) pid);
	129	fd = open(buf, O_RDONLY);
	130	if (fd < 0)
	131	return;
	132
	133	if (read(fd, buf, sizeof(buf)) < 0) {
	134	close(fd);
	135	return;
	136	}
	137
	138	if (strstr(buf, "mdmon") != NULL)
	139	kill(pid, SIGTERM);
	140	}
	141
e0d6609f NB	142	void remove_pidfile(char *devname)
	143	{
	144	char buf[100];
	145
6144ed44 DW	146	if (sigterm)
	147	return;
	148
e0d6609f NB	149	sprintf(buf, "/var/run/mdadm/%s.pid", devname);
e0d6609f NB	150	unlink(buf);
57752795 N	151	sprintf(buf, "/var/run/mdadm/%s.sock", devname);
57752795 N	152	unlink(buf);
e0d6609f NB	153	}
e0d6609f NB	154
295646b3	155	int make_control_sock(char *devname)
549e9569 NB	156	{
	157	char path[100];
	158	int sfd;
	159	long fl;
	160	struct sockaddr_un addr;
	161
6144ed44 DW	162	if (sigterm)
	163	return -1;
	164
549e9569 NB	165	sprintf(path, "/var/run/mdadm/%s.sock", devname);
	166	unlink(path);
	167	sfd = socket(PF_LOCAL, SOCK_STREAM, 0);
	168	if (sfd < 0)
	169	return -1;
	170
	171	addr.sun_family = PF_LOCAL;
	172	strcpy(addr.sun_path, path);
	173	if (bind(sfd, &addr, sizeof(addr)) < 0) {
	174	close(sfd);
	175	return -1;
	176	}
	177	listen(sfd, 10);
	178	fl = fcntl(sfd, F_GETFL, 0);
	179	fl \|= O_NONBLOCK;
	180	fcntl(sfd, F_SETFL, fl);
	181	return sfd;
	182	}
	183
295646b3 DW	184	int socket_hup_requested;
	185	static void hup(int sig)
	186	{
	187	socket_hup_requested = 1;
	188	}
	189
6144ed44 DW	190	static void term(int sig)
	191	{
	192	sigterm = 1;
	193	}
	194
4d43913c NB	195	static void wake_me(int sig)
	196	{
	197
	198	}
	199
16ddab0d DW	200	/* if we are debugging and starting mdmon by hand then don't fork */
	201	static int do_fork(void)
	202	{
	203	#ifdef DEBUG
	204	if (env_no_mdmon())
	205	return 0;
	206	#endif
	207
	208	return 1;
	209	}
	210
	211
	212
549e9569 NB	213	int main(int argc, char *argv[])
	214	{
	215	int mdfd;
549e9569 NB	216	struct mdinfo mdi, di;
549e9569 NB	217	struct supertype *container;
4d43913c	218	sigset_t set;
bfa44e2e	219	struct sigaction act;
9fe32043 N	220	int pfd[2];
9fe32043 N	221	int status;
3d2c4fc7	222	int ignore;
4d43913c	223
549e9569 NB	224	if (argc != 2) {
	225	fprintf(stderr, "Usage: md-manage /device/name/for/container\n");
	226	exit(2);
	227	}
	228	mdfd = open(argv[1], O_RDWR);
	229	if (mdfd < 0) {
	230	fprintf(stderr, "md-manage: %s: %s\n", argv[1],
	231	strerror(errno));
	232	exit(1);
	233	}
	234	if (md_get_version(mdfd) < 0) {
	235	fprintf(stderr, "md-manage: %s: Not an md device\n",
	236	argv[1]);
	237	exit(1);
	238	}
	239
9fe32043	240	/* Fork, and have the child tell us when they are ready */
16ddab0d	241	if (do_fork()) {
3d2c4fc7 DW	242	if (pipe(pfd) != 0) {
	243	fprintf(stderr, "mdmon: failed to create pipe\n");
	244	exit(1);
	245	}
16ddab0d DW	246	switch(fork()) {
	247	case -1:
	248	fprintf(stderr, "mdmon: failed to fork: %s\n",
	249	strerror(errno));
	250	exit(1);
	251	case 0: /* child */
	252	close(pfd[0]);
	253	break;
	254	default: /* parent */
	255	close(pfd[1]);
	256	if (read(pfd[0], &status, sizeof(status)) != sizeof(status)) {
	257	wait(&status);
	258	status = WEXITSTATUS(status);
	259	}
	260	exit(status);
9fe32043	261	}
16ddab0d DW	262	} else
16ddab0d DW	263	pfd[0] = pfd[1] = -1;
549e9569 NB	264	/* hopefully it is a container - we'll check later */
	265
	266	container = malloc(sizeof(*container));
549e9569 NB	267	container->devnum = fd2devnum(mdfd);
549e9569 NB	268	container->devname = devnum2devname(container->devnum);
e0d6609f	269	container->device_name = argv[1];
549e9569 NB	270
	271	/* If this fails, we hope it already exists */
	272	mkdir("/var/run/mdadm", 0600);
	273	/* pid file lives in /var/run/mdadm/mdXX.pid */
b109d928 DW	274	if (make_pidfile(container->devname, O_EXCL) < 0) {
	275	if (ping_monitor(container->devname) == 0) {
	276	fprintf(stderr, "mdmon: %s already managed\n",
	277	container->devname);
	278	exit(3);
	279	} else {
295646b3 DW	280	int err;
295646b3 DW	281
b109d928 DW	282	/* cleanup the old monitor, this one is taking over */
b109d928 DW	283	try_kill_monitor(container->devname);
295646b3 DW	284	err = make_pidfile(container->devname, 0);
295646b3 DW	285	if (err < 0) {
b109d928 DW	286	fprintf(stderr, "mdmon: %s Cannot create pidfile\n",
b109d928 DW	287	container->devname);
295646b3 DW	288	if (err == -EROFS) {
	289	/* FIXME implement a mechanism to
	290	* prevent duplicate monitor instances
	291	*/
	292	fprintf(stderr,
	293	"mdmon: continuing on read-only file system\n");
	294	} else
	295	exit(3);
b109d928 DW	296	}
b109d928 DW	297	}
549e9569 NB	298	}
	299
	300	container->sock = make_control_sock(container->devname);
549e9569 NB	301	container->arrays = NULL;
	302
	303	mdi = sysfs_read(mdfd, container->devnum,
	304	GET_VERSION\|GET_LEVEL\|GET_DEVS);
	305
	306	if (!mdi) {
	307	fprintf(stderr, "mdmon: failed to load sysfs info for %s\n",
	308	container->devname);
	309	exit(3);
	310	}
	311	if (mdi->array.level != UnSet) {
	312	fprintf(stderr, "mdmon: %s is not a container - cannot monitor\n",
	313	argv[1]);
	314	exit(3);
	315	}
	316	if (mdi->array.major_version != -1 \|\|
	317	mdi->array.minor_version != -2) {
	318	fprintf(stderr, "mdmon: %s does not use external metadata - cannot monitor\n",
	319	argv[1]);
	320	exit(3);
	321	}
	322
	323	container->ss = find_metadata_methods(mdi->text_version);
	324	if (container->ss == NULL) {
	325	fprintf(stderr, "mdmon: %s uses unknown metadata: %s\n",
	326	argv[1], mdi->text_version);
	327	exit(3);
	328	}
	329
	330	container->devs = NULL;
	331	for (di = mdi->devs; di; di = di->next) {
	332	struct mdinfo cd = malloc(sizeof(cd));
7bc1962f	333	cd = di;
549e9569 NB	334	cd->next = container->devs;
	335	container->devs = cd;
	336	}
	337	sysfs_free(mdi);
	338
	339
	340	if (container->ss->load_super(container, mdfd, argv[1])) {
	341	fprintf(stderr, "mdmon: Cannot load metadata for %s\n",
	342	argv[1]);
	343	exit(3);
	344	}
549e9569	345
9fe32043 N	346	/* Ok, this is close enough. We can say goodbye to our parent now.
	347	*/
	348	status = 0;
3d2c4fc7 DW	349	if (write(pfd[1], &status, sizeof(status)) < 0)
	350	fprintf(stderr, "mdmon: failed to notify our parent: %d\n",
	351	getppid());
9fe32043 N	352	close(pfd[1]);
9fe32043 N	353
3d2c4fc7	354	ignore = chdir("/");
9fe32043 N	355	setsid();
	356	close(0);
	357	open("/dev/null", O_RDWR);
	358	close(1);
3d2c4fc7	359	ignore = dup(0);
9fe32043 N	360	#ifndef DEBUG
9fe32043 N	361	close(2);
3d2c4fc7	362	ignore = dup(0);
9fe32043 N	363	#endif
9fe32043 N	364
549e9569 NB	365	mlockall(MCL_FUTURE);
549e9569 NB	366
4d43913c NB	367	/* SIGUSR is sent between parent and child. So both block it
	368	* and enable it only with pselect.
	369	*/
	370	sigemptyset(&set);
	371	sigaddset(&set, SIGUSR1);
295646b3	372	sigaddset(&set, SIGHUP);
695154b2	373	sigaddset(&set, SIGALRM);
6144ed44	374	sigaddset(&set, SIGTERM);
4d43913c	375	sigprocmask(SIG_BLOCK, &set, NULL);
bfa44e2e NB	376	act.sa_handler = wake_me;
	377	act.sa_flags = 0;
	378	sigaction(SIGUSR1, &act, NULL);
695154b2	379	sigaction(SIGALRM, &act, NULL);
295646b3 DW	380	act.sa_handler = hup;
295646b3 DW	381	sigaction(SIGHUP, &act, NULL);
6144ed44 DW	382	act.sa_handler = term;
6144ed44 DW	383	sigaction(SIGTERM, &act, NULL);
bfa44e2e NB	384	act.sa_handler = SIG_IGN;
bfa44e2e NB	385	sigaction(SIGPIPE, &act, NULL);
4d43913c	386
3e70c845	387	if (clone_monitor(container) < 0) {
295646b3	388	fprintf(stderr, "mdmon: failed to start monitor process: %s\n",
549e9569 NB	389	strerror(errno));
	390	exit(2);
	391	}
	392
	393	do_manager(container);
	394
	395	exit(0);
	396	}