[thirdparty/systemd.git] / udev-add.c

/*
 * udev-add.c
 *
 * Userspace devfs
 *
 * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
 *
 *
 *	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 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.,
 *	675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <grp.h>
#ifndef __KLIBC__
#include <pwd.h>
#endif

#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
#include "udev_version.h"
#include "udev_dbus.h"
#include "udev_selinux.h"
#include "logging.h"
#include "namedev.h"
#include "udevdb.h"
#include "klibc_fixups.h"

/* 
 * Right now the major/minor of a device is stored in a file called
 * "dev" in sysfs.
 * The number is stored as:
 * 	MM:mm
 * 		MM is the major
 * 		mm is the minor
 * 		The value is in decimal.
 */
static int get_major_minor(struct sysfs_class_device *class_dev, struct udevice *udev)
{
	int retval = -ENODEV;
	struct sysfs_attribute *attr = NULL;

	attr = sysfs_get_classdev_attr(class_dev, "dev");
	if (attr == NULL)
		goto exit;
	dbg("dev='%s'", attr->value);

	if (sscanf(attr->value, "%u:%u", &udev->major, &udev->minor) != 2)
		goto exit;
	dbg("found major=%d, minor=%d", udev->major, udev->minor);

	retval = 0;
exit:
	return retval;
}

static int create_path(char *file)
{
	char p[NAME_SIZE];
	char *pos;
	int retval;
	struct stat stats;
	
	strfieldcpy(p, file);
	pos = strchr(p+1, '/');
	while (1) {
		pos = strchr(pos+1, '/');
		if (pos == NULL)
			break;
		*pos = 0x00;
		if (stat(p, &stats)) {
			retval = mkdir(p, 0755);
			if (retval != 0) {
				dbg("mkdir(%s) failed with error '%s'",
				    p, strerror(errno));
				return retval;
			}
			dbg("created '%s'", p);
		}
		*pos = '/';
	}
	return 0;
}

static int make_node(char *filename, int major, int minor, unsigned int mode, uid_t uid, gid_t gid)
{
	int retval;

	retval = mknod(filename, mode, makedev(major, minor));
	if (retval != 0) {
		dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
		    filename, mode, major, minor, strerror(errno));
		return retval;
	}

	dbg("chmod(%s, %#o)", filename, mode);
	retval = chmod(filename, mode);
	if (retval != 0) {
		dbg("chmod(%s, %#o) failed with error '%s'",
		    filename, mode, strerror(errno));
		return retval;
	}

	if (uid != 0 || gid != 0) {
		dbg("chown(%s, %u, %u)", filename, uid, gid);
		retval = chown(filename, uid, gid);
		if (retval != 0) {
			dbg("chown(%s, %u, %u) failed with error '%s'",
			    filename, uid, gid, strerror(errno));
			return retval;
		}
	}

	return 0;
}

static int create_node(struct udevice *dev, int fake)
{
	struct stat stats;
	char filename[255];
	char linktarget[255];
	char partitionname[255];
	char *linkname;
	char *symlinks;
	int retval = 0;
	uid_t uid = 0;
	gid_t gid = 0;
	int i;
	int tail;

	strfieldcpy(filename, udev_root);
	strfieldcat(filename, dev->name);

	switch (dev->type) {
	case 'b':
		dev->mode |= S_IFBLK;
		break;
	case 'c':
	case 'u':
		dev->mode |= S_IFCHR;
		break;
	case 'p':
		dev->mode |= S_IFIFO;
		break;
	default:
		dbg("unknown node type %c\n", dev->type);
		return -EINVAL;
	}

	/* create parent directories if needed */
	if (strrchr(dev->name, '/'))
		create_path(filename);

	if (dev->owner[0] != '\0') {
		char *endptr;
		unsigned long id = strtoul(dev->owner, &endptr, 10);
		if (endptr[0] == '\0')
			uid = (uid_t) id;
		else {
			struct passwd *pw = getpwnam(dev->owner);
			if (pw == NULL)
				dbg("specified user unknown '%s'", dev->owner);
			else
				uid = pw->pw_uid;
		}
	}

	if (dev->group[0] != '\0') {
		char *endptr;
		unsigned long id = strtoul(dev->group, &endptr, 10);
		if (endptr[0] == '\0')
			gid = (gid_t) id;
		else {
			struct group *gr = getgrnam(dev->group);
			if (gr == NULL)
				dbg("specified group unknown '%s'", dev->group);
			else
				gid = gr->gr_gid;
		}
	}

	if (!fake) {
		info("creating device node '%s'", filename);
		make_node(filename, dev->major, dev->minor, dev->mode, uid, gid);
	} else {
		info("creating device node '%s', major = '%d', minor = '%d', "
		     "mode = '%#o', uid = '%d', gid = '%d'", filename,
		     dev->major, dev->minor, (mode_t)dev->mode, uid, gid);
	}

	/* create partitions if requested */
	if (dev->partitions > 0) {
		info("creating device partition nodes '%s[1-%i]'", filename, dev->partitions);
		if (!fake) {
			for (i = 1; i <= dev->partitions; i++) {
				sprintf(partitionname, "%s%i", filename, i);
				make_node(partitionname, dev->major,
					  dev->minor + i, dev->mode, uid, gid);
			}
		}
	}

	if (!fake)
		selinux_add_node(filename);

	/* create symlink if requested */
	if (dev->symlink[0] != '\0') {
		symlinks = dev->symlink;
		while (1) {
			linkname = strsep(&symlinks, " ");
			if (linkname == NULL || linkname[0] == '\0')
				break;

			strfieldcpy(filename, udev_root);
			strfieldcat(filename, linkname);
			dbg("symlink '%s' to node '%s' requested", filename, dev->name);
			if (!fake)
				if (strrchr(linkname, '/'))
					create_path(filename);

			/* optimize relative link */
			linktarget[0] = '\0';
			i = 0;
			tail = 0;
			while ((dev->name[i] == linkname[i]) && dev->name[i]) {
				if (dev->name[i] == '/')
					tail = i+1;
				i++;
			}
			while (linkname[i] != '\0') {
				if (linkname[i] == '/')
					strfieldcat(linktarget, "../");
				i++;
			}

			if (linktarget[0] == '\0')
				strfieldcpy(linktarget, "./");
			strfieldcat(linktarget, &dev->name[tail]);

			/* unlink existing files to ensure that our symlink is created */
			if (!fake && (lstat(filename, &stats) == 0)) {
				if ((stats.st_mode & S_IFMT) != S_IFDIR) {
					if (unlink(filename))
						dbg("unlink(%s) failed with error '%s'",
						    filename, strerror(errno));
				}
			}

			dbg("symlink(%s, %s)", linktarget, filename);
			if (!fake) {
				retval = symlink(linktarget, filename);
				if (retval != 0)
					dbg("symlink(%s, %s) failed with error '%s'",
					    linktarget, filename, strerror(errno));
			}
		}
	}

	return retval;
}

static struct sysfs_class_device *get_class_dev(char *device_name)
{
	char dev_path[SYSFS_PATH_MAX];
	struct sysfs_class_device *class_dev = NULL;

	strfieldcpy(dev_path, sysfs_path);
	strfieldcat(dev_path, device_name);
	dbg("looking at '%s'", dev_path);

	/* open up the sysfs class device for this thing... */
	class_dev = sysfs_open_class_device_path(dev_path);
	if (class_dev == NULL) {
		dbg ("sysfs_open_class_device_path failed");
		goto exit;
	}
	dbg("class_dev->name='%s'", class_dev->name);

exit:
	return class_dev;
}

/* wait for the "dev" file to show up in the directory in sysfs.
 * If it doesn't happen in about 10 seconds, give up.
 */
#define SECONDS_TO_WAIT_FOR_DEV		10
static int sleep_for_dev(char *path)
{
	char filename[SYSFS_PATH_MAX + 6];
	int loop = SECONDS_TO_WAIT_FOR_DEV;
	int retval;

	strfieldcpy(filename, sysfs_path);
	strfieldcat(filename, path);
	strfieldcat(filename, "/dev");

	while (loop--) {
		struct stat buf;

		dbg("looking for '%s'", filename);
		retval = stat(filename, &buf);
		if (retval == 0)
			goto exit;

		/* sleep to give the kernel a chance to create the dev file */
		sleep(1);
	}
	retval = -ENODEV;
exit:
	return retval;
}

int udev_add_device(char *path, char *subsystem, int fake)
{
	struct sysfs_class_device *class_dev = NULL;
	struct udevice dev;
	int retval = -EINVAL;

	memset(&dev, 0x00, sizeof(dev));

	/* for now, the block layer is the only place where block devices are */
	if (strcmp(subsystem, "block") == 0)
		dev.type = 'b';
	else
		dev.type = 'c';

	retval = sleep_for_dev(path);
	if (retval != 0)
		goto exit;

	class_dev = get_class_dev(path);
	if (class_dev == NULL)
		goto exit;

	retval = get_major_minor(class_dev, &dev);
	if (retval != 0) {
		dbg("get_major_minor failed");
		goto exit;
	}

	retval = namedev_name_device(class_dev, &dev);
	if (retval != 0)
		goto exit;

	if (!fake) {
		retval = udevdb_add_dev(path, &dev);
		if (retval != 0)
			dbg("udevdb_add_dev failed, but we are going to try "
			    "to create the node anyway. But remove might not "
			    "work properly for this device.");

	}
	dbg("name='%s'", dev.name);
	retval = create_node(&dev, fake);

	if ((retval == 0) && (!fake))
		sysbus_send_create(&dev, path);

exit:
	if (class_dev)
		sysfs_close_class_device(class_dev);

	return retval;
}
Commit	Line	Data
ea733a2f GKH	1	/*
	2	* udev-add.c
	3	*
	4	* Userspace devfs
	5	*
	6	* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
	7	*
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation version 2 of the License.
	12	*
	13	* This program is distributed in the hope that it will be useful, but
	14	* WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License along
	19	* with this program; if not, write to the Free Software Foundation, Inc.,
	20	* 675 Mass Ave, Cambridge, MA 02139, USA.
	21	*
	22	*/
	23
	24	#include <stdlib.h>
	25	#include <string.h>
	26	#include <stdio.h>
	27	#include <fcntl.h>
	28	#include <unistd.h>
	29	#include <errno.h>
32ff5bca	30	#include <sys/stat.h>
10950dfe GKH	31	#include <sys/types.h>
	32	#include <grp.h>
	33	#ifndef __KLIBC__
	34	#include <pwd.h>
	35	#endif
ea733a2f	36
c80da508	37	#include "libsysfs/sysfs/libsysfs.h"
ea733a2f GKH	38	#include "udev.h"
ea733a2f GKH	39	#include "udev_version.h"
7ac0feeb	40	#include "udev_dbus.h"
8481f8ce	41	#include "udev_selinux.h"
54988802	42	#include "logging.h"
ea733a2f	43	#include "namedev.h"
8e41d35d	44	#include "udevdb.h"
10950dfe	45	#include "klibc_fixups.h"
ea733a2f	46
ea733a2f GKH	47	/*
	48	* Right now the major/minor of a device is stored in a file called
	49	* "dev" in sysfs.
	50	* The number is stored as:
727d1ba5	51	* MM:mm
ea733a2f GKH	52	* MM is the major
ea733a2f GKH	53	* mm is the minor
727d1ba5	54	* The value is in decimal.
ea733a2f	55	*/
30defadd	56	static int get_major_minor(struct sysfs_class_device class_dev, struct udevice udev)
ea733a2f	57	{
ea256f90	58	int retval = -ENODEV;
5d4754f1	59	struct sysfs_attribute *attr = NULL;
ea733a2f	60
5d4754f1 DS	61	attr = sysfs_get_classdev_attr(class_dev, "dev");
5d4754f1 DS	62	if (attr == NULL)
ea256f90	63	goto exit;
5d4754f1	64	dbg("dev='%s'", attr->value);
ea733a2f	65
5d4754f1	66	if (sscanf(attr->value, "%u:%u", &udev->major, &udev->minor) != 2)
ea256f90	67	goto exit;
f7b4eca4	68	dbg("found major=%d, minor=%d", udev->major, udev->minor);
ea733a2f GKH	69
ea733a2f GKH	70	retval = 0;
ea256f90	71	exit:
ea733a2f GKH	72	return retval;
	73	}
	74
3d150dfb KS	75	static int create_path(char *file)
	76	{
	77	char p[NAME_SIZE];
	78	char *pos;
	79	int retval;
	80	struct stat stats;
	81
c472e3c8	82	strfieldcpy(p, file);
3d150dfb KS	83	pos = strchr(p+1, '/');
	84	while (1) {
	85	pos = strchr(pos+1, '/');
	86	if (pos == NULL)
	87	break;
	88	*pos = 0x00;
	89	if (stat(p, &stats)) {
	90	retval = mkdir(p, 0755);
c5118442	91	if (retval != 0) {
3d150dfb KS	92	dbg("mkdir(%s) failed with error '%s'",
	93	p, strerror(errno));
	94	return retval;
	95	}
	96	dbg("created '%s'", p);
	97	}
	98	*pos = '/';
	99	}
	100	return 0;
	101	}
	102
50e5de03 KS	103	static int make_node(char *filename, int major, int minor, unsigned int mode, uid_t uid, gid_t gid)
	104	{
	105	int retval;
	106
	107	retval = mknod(filename, mode, makedev(major, minor));
	108	if (retval != 0) {
	109	dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
	110	filename, mode, major, minor, strerror(errno));
	111	return retval;
	112	}
	113
	114	dbg("chmod(%s, %#o)", filename, mode);
	115	retval = chmod(filename, mode);
	116	if (retval != 0) {
	117	dbg("chmod(%s, %#o) failed with error '%s'",
	118	filename, mode, strerror(errno));
	119	return retval;
	120	}
	121
	122	if (uid != 0 \|\| gid != 0) {
	123	dbg("chown(%s, %u, %u)", filename, uid, gid);
	124	retval = chown(filename, uid, gid);
	125	if (retval != 0) {
	126	dbg("chown(%s, %u, %u) failed with error '%s'",
	127	filename, uid, gid, strerror(errno));
	128	return retval;
	129	}
	130	}
	131
	132	return 0;
	133	}
	134
eb10f97f	135	static int create_node(struct udevice *dev, int fake)
ea733a2f	136	{
3f09184b	137	struct stat stats;
ea733a2f	138	char filename[255];
3d150dfb	139	char linktarget[255];
50e5de03	140	char partitionname[255];
4763256c KS	141	char *linkname;
4763256c KS	142	char *symlinks;
ea733a2f	143	int retval = 0;
e308ebb7 GKH	144	uid_t uid = 0;
e308ebb7 GKH	145	gid_t gid = 0;
3d150dfb KS	146	int i;
	147	int tail;
	148
c472e3c8 KS	149	strfieldcpy(filename, udev_root);
c472e3c8 KS	150	strfieldcat(filename, dev->name);
5840bc63 GKH	151
5840bc63 GKH	152	switch (dev->type) {
1331c889	153	case 'b':
5840bc63	154	dev->mode \|= S_IFBLK;
1331c889 GKH	155	break;
	156	case 'c':
	157	case 'u':
5840bc63	158	dev->mode \|= S_IFCHR;
1331c889 GKH	159	break;
1331c889 GKH	160	case 'p':
5840bc63	161	dev->mode \|= S_IFIFO;
1331c889 GKH	162	break;
1331c889 GKH	163	default:
5840bc63	164	dbg("unknown node type %c\n", dev->type);
1331c889 GKH	165	return -EINVAL;
1331c889 GKH	166	}
0abf54fc	167
3d150dfb KS	168	/* create parent directories if needed */
	169	if (strrchr(dev->name, '/'))
	170	create_path(filename);
218eae87	171
c5118442	172	if (dev->owner[0] != '\0') {
c19a6b30 KS	173	char *endptr;
c19a6b30 KS	174	unsigned long id = strtoul(dev->owner, &endptr, 10);
765cbd97	175	if (endptr[0] == '\0')
c19a6b30	176	uid = (uid_t) id;
10950dfe GKH	177	else {
10950dfe GKH	178	struct passwd *pw = getpwnam(dev->owner);
765cbd97 KS	179	if (pw == NULL)
765cbd97 KS	180	dbg("specified user unknown '%s'", dev->owner);
10950dfe GKH	181	else
	182	uid = pw->pw_uid;
	183	}
c19a6b30 KS	184	}
c19a6b30 KS	185
c5118442	186	if (dev->group[0] != '\0') {
c19a6b30 KS	187	char *endptr;
c19a6b30 KS	188	unsigned long id = strtoul(dev->group, &endptr, 10);
765cbd97	189	if (endptr[0] == '\0')
c19a6b30	190	gid = (gid_t) id;
10950dfe GKH	191	else {
10950dfe GKH	192	struct group *gr = getgrnam(dev->group);
765cbd97 KS	193	if (gr == NULL)
765cbd97 KS	194	dbg("specified group unknown '%s'", dev->group);
10950dfe GKH	195	else
	196	gid = gr->gr_gid;
	197	}
c19a6b30 KS	198	}
c19a6b30 KS	199
ab2e5bd9	200	if (!fake) {
50e5de03 KS	201	info("creating device node '%s'", filename);
50e5de03 KS	202	make_node(filename, dev->major, dev->minor, dev->mode, uid, gid);
ab2e5bd9 GKH	203	} else {
	204	info("creating device node '%s', major = '%d', minor = '%d', "
	205	"mode = '%#o', uid = '%d', gid = '%d'", filename,
	206	dev->major, dev->minor, (mode_t)dev->mode, uid, gid);
	207	}
50e5de03 KS	208
	209	/* create partitions if requested */
	210	if (dev->partitions > 0) {
	211	info("creating device partition nodes '%s[1-%i]'", filename, dev->partitions);
ab2e5bd9 GKH	212	if (!fake) {
	213	for (i = 1; i <= dev->partitions; i++) {
	214	sprintf(partitionname, "%s%i", filename, i);
	215	make_node(partitionname, dev->major,
	216	dev->minor + i, dev->mode, uid, gid);
	217	}
50e5de03	218	}
3d150dfb KS	219	}
3d150dfb KS	220
8481f8ce GKH	221	if (!fake)
	222	selinux_add_node(filename);
	223
3d150dfb	224	/* create symlink if requested */
c5118442	225	if (dev->symlink[0] != '\0') {
4763256c KS	226	symlinks = dev->symlink;
	227	while (1) {
	228	linkname = strsep(&symlinks, " ");
0529e2ed	229	if (linkname == NULL \|\| linkname[0] == '\0')
4763256c KS	230	break;
4763256c KS	231
c472e3c8 KS	232	strfieldcpy(filename, udev_root);
c472e3c8 KS	233	strfieldcat(filename, linkname);
4763256c	234	dbg("symlink '%s' to node '%s' requested", filename, dev->name);
eb10f97f GKH	235	if (!fake)
	236	if (strrchr(linkname, '/'))
	237	create_path(filename);
4763256c KS	238
	239	/* optimize relative link */
	240	linktarget[0] = '\0';
	241	i = 0;
	242	tail = 0;
	243	while ((dev->name[i] == linkname[i]) && dev->name[i]) {
	244	if (dev->name[i] == '/')
	245	tail = i+1;
	246	i++;
	247	}
c5118442	248	while (linkname[i] != '\0') {
4763256c	249	if (linkname[i] == '/')
c472e3c8	250	strfieldcat(linktarget, "../");
4763256c KS	251	i++;
4763256c KS	252	}
3d150dfb	253
c5118442	254	if (linktarget[0] == '\0')
c472e3c8 KS	255	strfieldcpy(linktarget, "./");
c472e3c8 KS	256	strfieldcat(linktarget, &dev->name[tail]);
3d150dfb	257
50e5de03	258	/* unlink existing files to ensure that our symlink is created */
eb10f97f	259	if (!fake && (lstat(filename, &stats) == 0)) {
3f09184b	260	if ((stats.st_mode & S_IFMT) != S_IFDIR) {
	261	if (unlink(filename))
	262	dbg("unlink(%s) failed with error '%s'",
	263	filename, strerror(errno));
	264	}
	265	}
	266
4763256c	267	dbg("symlink(%s, %s)", linktarget, filename);
eb10f97f GKH	268	if (!fake) {
	269	retval = symlink(linktarget, filename);
	270	if (retval != 0)
	271	dbg("symlink(%s, %s) failed with error '%s'",
	272	linktarget, filename, strerror(errno));
	273	}
4763256c	274	}
c19a6b30 KS	275	}
c19a6b30 KS	276
ea733a2f GKH	277	return retval;
	278	}
	279
d7e954a4	280	static struct sysfs_class_device get_class_dev(char device_name)
ea733a2f GKH	281	{
ea733a2f GKH	282	char dev_path[SYSFS_PATH_MAX];
63dde9f8 GKH	283	struct sysfs_class_device *class_dev = NULL;
63dde9f8 GKH	284
c472e3c8 KS	285	strfieldcpy(dev_path, sysfs_path);
c472e3c8 KS	286	strfieldcat(dev_path, device_name);
f7b4eca4	287	dbg("looking at '%s'", dev_path);
ea733a2f GKH	288
ea733a2f GKH	289	/* open up the sysfs class device for this thing... */
bcbe2d8e	290	class_dev = sysfs_open_class_device_path(dev_path);
ea733a2f	291	if (class_dev == NULL) {
bcbe2d8e	292	dbg ("sysfs_open_class_device_path failed");
63dde9f8	293	goto exit;
ea733a2f	294	}
f7b4eca4	295	dbg("class_dev->name='%s'", class_dev->name);
ea733a2f	296
63dde9f8	297	exit:
ea733a2f GKH	298	return class_dev;
	299	}
	300
29fd7e67 GKH	301	/* wait for the "dev" file to show up in the directory in sysfs.
	302	* If it doesn't happen in about 10 seconds, give up.
	303	*/
	304	#define SECONDS_TO_WAIT_FOR_DEV 10
6089318c	305	static int sleep_for_dev(char *path)
29fd7e67 GKH	306	{
29fd7e67 GKH	307	char filename[SYSFS_PATH_MAX + 6];
c332cfc7 RL	308	int loop = SECONDS_TO_WAIT_FOR_DEV;
c332cfc7 RL	309	int retval;
29fd7e67	310
c472e3c8 KS	311	strfieldcpy(filename, sysfs_path);
	312	strfieldcat(filename, path);
	313	strfieldcat(filename, "/dev");
29fd7e67	314
c332cfc7 RL	315	while (loop--) {
	316	struct stat buf;
	317
f7b4eca4	318	dbg("looking for '%s'", filename);
29fd7e67	319	retval = stat(filename, &buf);
c5118442	320	if (retval == 0)
29fd7e67	321	goto exit;
29fd7e67	322
f7b4eca4	323	/* sleep to give the kernel a chance to create the dev file */
29fd7e67 GKH	324	sleep(1);
	325	}
	326	retval = -ENODEV;
	327	exit:
	328	return retval;
	329	}
	330
eb10f97f	331	int udev_add_device(char path, char subsystem, int fake)
ea733a2f	332	{
30defadd	333	struct sysfs_class_device *class_dev = NULL;
5840bc63	334	struct udevice dev;
ea733a2f GKH	335	int retval = -EINVAL;
ea733a2f GKH	336
f3b04a2e GKH	337	memset(&dev, 0x00, sizeof(dev));
f3b04a2e GKH	338
ea733a2f GKH	339	/* for now, the block layer is the only place where block devices are */
ea733a2f GKH	340	if (strcmp(subsystem, "block") == 0)
5840bc63	341	dev.type = 'b';
ea733a2f	342	else
5840bc63	343	dev.type = 'c';
ea733a2f	344
5840bc63	345	retval = sleep_for_dev(path);
c5118442	346	if (retval != 0)
29fd7e67	347	goto exit;
63dde9f8	348
5840bc63	349	class_dev = get_class_dev(path);
ea733a2f GKH	350	if (class_dev == NULL)
	351	goto exit;
	352
30defadd	353	retval = get_major_minor(class_dev, &dev);
c5118442	354	if (retval != 0) {
ca999860	355	dbg("get_major_minor failed");
ea733a2f GKH	356	goto exit;
	357	}
	358
30defadd	359	retval = namedev_name_device(class_dev, &dev);
c5118442	360	if (retval != 0)
30defadd GKH	361	goto exit;
30defadd GKH	362
eb10f97f GKH	363	if (!fake) {
	364	retval = udevdb_add_dev(path, &dev);
	365	if (retval != 0)
	366	dbg("udevdb_add_dev failed, but we are going to try "
	367	"to create the node anyway. But remove might not "
	368	"work properly for this device.");
ca999860	369
eb10f97f	370	}
f7b4eca4	371	dbg("name='%s'", dev.name);
eb10f97f	372	retval = create_node(&dev, fake);
ea733a2f	373
eb10f97f	374	if ((retval == 0) && (!fake))
7ac0feeb	375	sysbus_send_create(&dev, path);
5aebfbcb	376
ea733a2f	377	exit:
30defadd GKH	378	if (class_dev)
	379	sysfs_close_class_device(class_dev);
	380
ea733a2f GKH	381	return retval;
ea733a2f GKH	382	}