[net-next-2.6.git] / init / do_mounts.c

#include <linux/module.h>
#include <linux/sched.h>
#include <linux/ctype.h>
#include <linux/fd.h>
#include <linux/tty.h>
#include <linux/suspend.h>
#include <linux/root_dev.h>
#include <linux/security.h>
#include <linux/delay.h>
#include <linux/genhd.h>
#include <linux/mount.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/fs.h>

#include <linux/nfs_fs.h>
#include <linux/nfs_fs_sb.h>
#include <linux/nfs_mount.h>

#include "do_mounts.h"

int __initdata rd_doload;	/* 1 = load RAM disk, 0 = don't load */

int root_mountflags = MS_RDONLY | MS_SILENT;
char * __initdata root_device_name;
static char __initdata saved_root_name[64];
static int __initdata root_wait;

dev_t ROOT_DEV;

static int __init load_ramdisk(char *str)
{
	rd_doload = simple_strtol(str,NULL,0) & 3;
	return 1;
}
__setup("load_ramdisk=", load_ramdisk);

static int __init readonly(char *str)
{
	if (*str)
		return 0;
	root_mountflags |= MS_RDONLY;
	return 1;
}

static int __init readwrite(char *str)
{
	if (*str)
		return 0;
	root_mountflags &= ~MS_RDONLY;
	return 1;
}

__setup("ro", readonly);
__setup("rw", readwrite);

/*
 *	Convert a name into device number.  We accept the following variants:
 *
 *	1) device number in hexadecimal	represents itself
 *	2) /dev/nfs represents Root_NFS (0xff)
 *	3) /dev/<disk_name> represents the device number of disk
 *	4) /dev/<disk_name><decimal> represents the device number
 *         of partition - device number of disk plus the partition number
 *	5) /dev/<disk_name>p<decimal> - same as the above, that form is
 *	   used when disk name of partitioned disk ends on a digit.
 *
 *	If name doesn't have fall into the categories above, we return (0,0).
 *	block_class is used to check if something is a disk name. If the disk
 *	name contains slashes, the device name has them replaced with
 *	bangs.
 */

dev_t name_to_dev_t(char *name)
{
	char s[32];
	char *p;
	dev_t res = 0;
	int part;

	if (strncmp(name, "/dev/", 5) != 0) {
		unsigned maj, min;

		if (sscanf(name, "%u:%u", &maj, &min) == 2) {
			res = MKDEV(maj, min);
			if (maj != MAJOR(res) || min != MINOR(res))
				goto fail;
		} else {
			res = new_decode_dev(simple_strtoul(name, &p, 16));
			if (*p)
				goto fail;
		}
		goto done;
	}

	name += 5;
	res = Root_NFS;
	if (strcmp(name, "nfs") == 0)
		goto done;
	res = Root_RAM0;
	if (strcmp(name, "ram") == 0)
		goto done;

	if (strlen(name) > 31)
		goto fail;
	strcpy(s, name);
	for (p = s; *p; p++)
		if (*p == '/')
			*p = '!';
	res = blk_lookup_devt(s, 0);
	if (res)
		goto done;

	/*
	 * try non-existant, but valid partition, which may only exist
	 * after revalidating the disk, like partitioned md devices
	 */
	while (p > s && isdigit(p[-1]))
		p--;
	if (p == s || !*p || *p == '0')
		goto fail;

	/* try disk name without <part number> */
	part = simple_strtoul(p, NULL, 10);
	*p = '\0';
	res = blk_lookup_devt(s, part);
	if (res)
		goto done;

	/* try disk name without p<part number> */
	if (p < s + 2 || !isdigit(p[-2]) || p[-1] != 'p')
		goto fail;
	p[-1] = '\0';
	res = blk_lookup_devt(s, part);
	if (res)
		goto done;

fail:
	return 0;
done:
	return res;
}

static int __init root_dev_setup(char *line)
{
	strlcpy(saved_root_name, line, sizeof(saved_root_name));
	return 1;
}

__setup("root=", root_dev_setup);

static int __init rootwait_setup(char *str)
{
	if (*str)
		return 0;
	root_wait = 1;
	return 1;
}

__setup("rootwait", rootwait_setup);

static char * __initdata root_mount_data;
static int __init root_data_setup(char *str)
{
	root_mount_data = str;
	return 1;
}

static char * __initdata root_fs_names;
static int __init fs_names_setup(char *str)
{
	root_fs_names = str;
	return 1;
}

static unsigned int __initdata root_delay;
static int __init root_delay_setup(char *str)
{
	root_delay = simple_strtoul(str, NULL, 0);
	return 1;
}

__setup("rootflags=", root_data_setup);
__setup("rootfstype=", fs_names_setup);
__setup("rootdelay=", root_delay_setup);

static void __init get_fs_names(char *page)
{
	char *s = page;

	if (root_fs_names) {
		strcpy(page, root_fs_names);
		while (*s++) {
			if (s[-1] == ',')
				s[-1] = '\0';
		}
	} else {
		int len = get_filesystem_list(page);
		char *p, *next;

		page[len] = '\0';
		for (p = page-1; p; p = next) {
			next = strchr(++p, '\n');
			if (*p++ != '\t')
				continue;
			while ((*s++ = *p++) != '\n')
				;
			s[-1] = '\0';
		}
	}
	*s = '\0';
}

static int __init do_mount_root(char *name, char *fs, int flags, void *data)
{
	int err = sys_mount(name, "/root", fs, flags, data);
	if (err)
		return err;

	sys_chdir("/root");
	ROOT_DEV = current->fs->pwd.mnt->mnt_sb->s_dev;
	printk("VFS: Mounted root (%s filesystem)%s.\n",
	       current->fs->pwd.mnt->mnt_sb->s_type->name,
	       current->fs->pwd.mnt->mnt_sb->s_flags & MS_RDONLY ?
	       " readonly" : "");
	return 0;
}

void __init mount_block_root(char *name, int flags)
{
	char *fs_names = __getname();
	char *p;
#ifdef CONFIG_BLOCK
	char b[BDEVNAME_SIZE];
#else
	const char *b = name;
#endif

	get_fs_names(fs_names);
retry:
	for (p = fs_names; *p; p += strlen(p)+1) {
		int err = do_mount_root(name, p, flags, root_mount_data);
		switch (err) {
			case 0:
				goto out;
			case -EACCES:
				flags |= MS_RDONLY;
				goto retry;
			case -EINVAL:
				continue;
		}
	        /*
		 * Allow the user to distinguish between failed sys_open
		 * and bad superblock on root device.
		 * and give them a list of the available devices
		 */
#ifdef CONFIG_BLOCK
		__bdevname(ROOT_DEV, b);
#endif
		printk("VFS: Cannot open root device \"%s\" or %s\n",
				root_device_name, b);
		printk("Please append a correct \"root=\" boot option; here are the available partitions:\n");

		printk_all_partitions();
		panic("VFS: Unable to mount root fs on %s", b);
	}

	printk("List of all partitions:\n");
	printk_all_partitions();
	printk("No filesystem could mount root, tried: ");
	for (p = fs_names; *p; p += strlen(p)+1)
		printk(" %s", p);
	printk("\n");
#ifdef CONFIG_BLOCK
	__bdevname(ROOT_DEV, b);
#endif
	panic("VFS: Unable to mount root fs on %s", b);
out:
	putname(fs_names);
}
 
#ifdef CONFIG_ROOT_NFS
static int __init mount_nfs_root(void)
{
	void *data = nfs_root_data();

	create_dev("/dev/root", ROOT_DEV);
	if (data &&
	    do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0)
		return 1;
	return 0;
}
#endif

#if defined(CONFIG_BLK_DEV_RAM) || defined(CONFIG_BLK_DEV_FD)
void __init change_floppy(char *fmt, ...)
{
	struct termios termios;
	char buf[80];
	char c;
	int fd;
	va_list args;
	va_start(args, fmt);
	vsprintf(buf, fmt, args);
	va_end(args);
	fd = sys_open("/dev/root", O_RDWR | O_NDELAY, 0);
	if (fd >= 0) {
		sys_ioctl(fd, FDEJECT, 0);
		sys_close(fd);
	}
	printk(KERN_NOTICE "VFS: Insert %s and press ENTER\n", buf);
	fd = sys_open("/dev/console", O_RDWR, 0);
	if (fd >= 0) {
		sys_ioctl(fd, TCGETS, (long)&termios);
		termios.c_lflag &= ~ICANON;
		sys_ioctl(fd, TCSETSF, (long)&termios);
		sys_read(fd, &c, 1);
		termios.c_lflag |= ICANON;
		sys_ioctl(fd, TCSETSF, (long)&termios);
		sys_close(fd);
	}
}
#endif

void __init mount_root(void)
{
#ifdef CONFIG_ROOT_NFS
	if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) {
		if (mount_nfs_root())
			return;

		printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n");
		ROOT_DEV = Root_FD0;
	}
#endif
#ifdef CONFIG_BLK_DEV_FD
	if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) {
		/* rd_doload is 2 for a dual initrd/ramload setup */
		if (rd_doload==2) {
			if (rd_load_disk(1)) {
				ROOT_DEV = Root_RAM1;
				root_device_name = NULL;
			}
		} else
			change_floppy("root floppy");
	}
#endif
#ifdef CONFIG_BLOCK
	create_dev("/dev/root", ROOT_DEV);
	mount_block_root("/dev/root", root_mountflags);
#endif
}

/*
 * Prepare the namespace - decide what/where to mount, load ramdisks, etc.
 */
void __init prepare_namespace(void)
{
	int is_floppy;

	if (root_delay) {
		printk(KERN_INFO "Waiting %dsec before mounting root device...\n",
		       root_delay);
		ssleep(root_delay);
	}

	/* wait for the known devices to complete their probing */
	while (driver_probe_done() != 0)
		msleep(100);

	md_run_setup();

	if (saved_root_name[0]) {
		root_device_name = saved_root_name;
		if (!strncmp(root_device_name, "mtd", 3) ||
		    !strncmp(root_device_name, "ubi", 3)) {
			mount_block_root(root_device_name, root_mountflags);
			goto out;
		}
		ROOT_DEV = name_to_dev_t(root_device_name);
		if (strncmp(root_device_name, "/dev/", 5) == 0)
			root_device_name += 5;
	}

	if (initrd_load())
		goto out;

	/* wait for any asynchronous scanning to complete */
	if ((ROOT_DEV == 0) && root_wait) {
		printk(KERN_INFO "Waiting for root device %s...\n",
			saved_root_name);
		while (driver_probe_done() != 0 ||
			(ROOT_DEV = name_to_dev_t(saved_root_name)) == 0)
			msleep(100);
	}

	is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR;

	if (is_floppy && rd_doload && rd_load_disk(0))
		ROOT_DEV = Root_RAM0;

	mount_root();
out:
	sys_mount(".", "/", NULL, MS_MOVE, NULL);
	sys_chroot(".");
}
Commit	Line	Data
1da177e4 LT	1	#include <linux/module.h>
	2	#include <linux/sched.h>
	3	#include <linux/ctype.h>
	4	#include <linux/fd.h>
	5	#include <linux/tty.h>
	6	#include <linux/suspend.h>
	7	#include <linux/root_dev.h>
	8	#include <linux/security.h>
	9	#include <linux/delay.h>
dd2a345f	10	#include <linux/genhd.h>
d53d9f16	11	#include <linux/mount.h>
d779249e	12	#include <linux/device.h>
46595390	13	#include <linux/init.h>
011e3fcd	14	#include <linux/fs.h>
1da177e4 LT	15
	16	#include <linux/nfs_fs.h>
	17	#include <linux/nfs_fs_sb.h>
	18	#include <linux/nfs_mount.h>
	19
	20	#include "do_mounts.h"
	21
1da177e4 LT	22	int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */
1da177e4 LT	23
9b04c997	24	int root_mountflags = MS_RDONLY \| MS_SILENT;
1da177e4 LT	25	char * __initdata root_device_name;
1da177e4 LT	26	static char __initdata saved_root_name[64];
cc1ed754	27	static int __initdata root_wait;
1da177e4	28
1da177e4 LT	29	dev_t ROOT_DEV;
1da177e4 LT	30
1da177e4 LT	31	static int __init load_ramdisk(char *str)
	32	{
	33	rd_doload = simple_strtol(str,NULL,0) & 3;
	34	return 1;
	35	}
	36	__setup("load_ramdisk=", load_ramdisk);
	37
	38	static int __init readonly(char *str)
	39	{
	40	if (*str)
	41	return 0;
	42	root_mountflags \|= MS_RDONLY;
	43	return 1;
	44	}
	45
	46	static int __init readwrite(char *str)
	47	{
	48	if (*str)
	49	return 0;
	50	root_mountflags &= ~MS_RDONLY;
	51	return 1;
	52	}
	53
	54	__setup("ro", readonly);
	55	__setup("rw", readwrite);
	56
1da177e4 LT	57	/*
	58	* Convert a name into device number. We accept the following variants:
	59	*
	60	* 1) device number in hexadecimal represents itself
	61	* 2) /dev/nfs represents Root_NFS (0xff)
	62	* 3) /dev/<disk_name> represents the device number of disk
	63	* 4) /dev/<disk_name><decimal> represents the device number
	64	* of partition - device number of disk plus the partition number
	65	* 5) /dev/<disk_name>p<decimal> - same as the above, that form is
	66	* used when disk name of partitioned disk ends on a digit.
	67	*
edfaa7c3 KS	68	* If name doesn't have fall into the categories above, we return (0,0).
	69	* block_class is used to check if something is a disk name. If the disk
	70	* name contains slashes, the device name has them replaced with
	71	* bangs.
1da177e4 LT	72	*/
	73
	74	dev_t name_to_dev_t(char *name)
	75	{
	76	char s[32];
	77	char *p;
	78	dev_t res = 0;
30f2f0eb	79	int part;
1da177e4 LT	80
	81	if (strncmp(name, "/dev/", 5) != 0) {
	82	unsigned maj, min;
	83
	84	if (sscanf(name, "%u:%u", &maj, &min) == 2) {
	85	res = MKDEV(maj, min);
	86	if (maj != MAJOR(res) \|\| min != MINOR(res))
	87	goto fail;
	88	} else {
	89	res = new_decode_dev(simple_strtoul(name, &p, 16));
	90	if (*p)
	91	goto fail;
	92	}
	93	goto done;
	94	}
edfaa7c3	95
1da177e4 LT	96	name += 5;
	97	res = Root_NFS;
	98	if (strcmp(name, "nfs") == 0)
	99	goto done;
	100	res = Root_RAM0;
	101	if (strcmp(name, "ram") == 0)
	102	goto done;
	103
	104	if (strlen(name) > 31)
	105	goto fail;
	106	strcpy(s, name);
	107	for (p = s; *p; p++)
	108	if (*p == '/')
	109	*p = '!';
30f2f0eb KS	110	res = blk_lookup_devt(s, 0);
	111	if (res)
	112	goto done;
	113
	114	/*
	115	* try non-existant, but valid partition, which may only exist
	116	* after revalidating the disk, like partitioned md devices
	117	*/
	118	while (p > s && isdigit(p[-1]))
	119	p--;
	120	if (p == s \|\| !p \|\| p == '0')
	121	goto fail;
	122
	123	/* try disk name without <part number> */
	124	part = simple_strtoul(p, NULL, 10);
	125	*p = '\0';
	126	res = blk_lookup_devt(s, part);
	127	if (res)
	128	goto done;
	129
	130	/* try disk name without p<part number> */
	131	if (p < s + 2 \|\| !isdigit(p[-2]) \|\| p[-1] != 'p')
	132	goto fail;
	133	p[-1] = '\0';
	134	res = blk_lookup_devt(s, part);
1da177e4 LT	135	if (res)
	136	goto done;
	137
edfaa7c3 KS	138	fail:
edfaa7c3 KS	139	return 0;
1da177e4	140	done:
1da177e4	141	return res;
1da177e4 LT	142	}
	143
	144	static int __init root_dev_setup(char *line)
	145	{
	146	strlcpy(saved_root_name, line, sizeof(saved_root_name));
	147	return 1;
	148	}
	149
	150	__setup("root=", root_dev_setup);
	151
cc1ed754 PO	152	static int __init rootwait_setup(char *str)
	153	{
	154	if (*str)
	155	return 0;
	156	root_wait = 1;
	157	return 1;
	158	}
	159
	160	__setup("rootwait", rootwait_setup);
	161
1da177e4 LT	162	static char * __initdata root_mount_data;
	163	static int __init root_data_setup(char *str)
	164	{
	165	root_mount_data = str;
	166	return 1;
	167	}
	168
	169	static char * __initdata root_fs_names;
	170	static int __init fs_names_setup(char *str)
	171	{
	172	root_fs_names = str;
	173	return 1;
	174	}
	175
	176	static unsigned int __initdata root_delay;
	177	static int __init root_delay_setup(char *str)
	178	{
	179	root_delay = simple_strtoul(str, NULL, 0);
	180	return 1;
	181	}
	182
	183	__setup("rootflags=", root_data_setup);
	184	__setup("rootfstype=", fs_names_setup);
	185	__setup("rootdelay=", root_delay_setup);
	186
	187	static void __init get_fs_names(char *page)
	188	{
	189	char *s = page;
	190
	191	if (root_fs_names) {
	192	strcpy(page, root_fs_names);
	193	while (*s++) {
	194	if (s[-1] == ',')
	195	s[-1] = '\0';
	196	}
	197	} else {
	198	int len = get_filesystem_list(page);
	199	char p, next;
	200
	201	page[len] = '\0';
	202	for (p = page-1; p; p = next) {
	203	next = strchr(++p, '\n');
	204	if (*p++ != '\t')
	205	continue;
	206	while ((s++ = p++) != '\n')
	207	;
	208	s[-1] = '\0';
	209	}
	210	}
	211	*s = '\0';
	212	}
	213
	214	static int __init do_mount_root(char name, char fs, int flags, void *data)
	215	{
	216	int err = sys_mount(name, "/root", fs, flags, data);
	217	if (err)
	218	return err;
	219
	220	sys_chdir("/root");
6ac08c39	221	ROOT_DEV = current->fs->pwd.mnt->mnt_sb->s_dev;
1da177e4	222	printk("VFS: Mounted root (%s filesystem)%s.\n",
6ac08c39 JB	223	current->fs->pwd.mnt->mnt_sb->s_type->name,
6ac08c39 JB	224	current->fs->pwd.mnt->mnt_sb->s_flags & MS_RDONLY ?
1da177e4 LT	225	" readonly" : "");
	226	return 0;
	227	}
	228
	229	void __init mount_block_root(char *name, int flags)
	230	{
	231	char *fs_names = __getname();
	232	char *p;
9361401e	233	#ifdef CONFIG_BLOCK
1da177e4	234	char b[BDEVNAME_SIZE];
9361401e DH	235	#else
	236	const char *b = name;
	237	#endif
1da177e4 LT	238
	239	get_fs_names(fs_names);
	240	retry:
	241	for (p = fs_names; *p; p += strlen(p)+1) {
	242	int err = do_mount_root(name, p, flags, root_mount_data);
	243	switch (err) {
	244	case 0:
	245	goto out;
	246	case -EACCES:
	247	flags \|= MS_RDONLY;
	248	goto retry;
	249	case -EINVAL:
	250	continue;
	251	}
	252	/*
	253	* Allow the user to distinguish between failed sys_open
	254	* and bad superblock on root device.
dd2a345f	255	* and give them a list of the available devices
1da177e4	256	*/
9361401e	257	#ifdef CONFIG_BLOCK
1da177e4	258	__bdevname(ROOT_DEV, b);
9361401e	259	#endif
1da177e4 LT	260	printk("VFS: Cannot open root device \"%s\" or %s\n",
1da177e4 LT	261	root_device_name, b);
dd2a345f	262	printk("Please append a correct \"root=\" boot option; here are the available partitions:\n");
1da177e4	263
dd2a345f	264	printk_all_partitions();
1da177e4 LT	265	panic("VFS: Unable to mount root fs on %s", b);
1da177e4 LT	266	}
be6e028b	267
dd2a345f DG	268	printk("List of all partitions:\n");
dd2a345f DG	269	printk_all_partitions();
be6e028b AW	270	printk("No filesystem could mount root, tried: ");
	271	for (p = fs_names; *p; p += strlen(p)+1)
	272	printk(" %s", p);
	273	printk("\n");
9361401e DH	274	#ifdef CONFIG_BLOCK
	275	__bdevname(ROOT_DEV, b);
	276	#endif
	277	panic("VFS: Unable to mount root fs on %s", b);
1da177e4 LT	278	out:
	279	putname(fs_names);
	280	}
	281
	282	#ifdef CONFIG_ROOT_NFS
	283	static int __init mount_nfs_root(void)
	284	{
	285	void *data = nfs_root_data();
	286
bdaf8529	287	create_dev("/dev/root", ROOT_DEV);
1da177e4 LT	288	if (data &&
	289	do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0)
	290	return 1;
	291	return 0;
	292	}
	293	#endif
	294
	295	#if defined(CONFIG_BLK_DEV_RAM) \|\| defined(CONFIG_BLK_DEV_FD)
	296	void __init change_floppy(char *fmt, ...)
	297	{
	298	struct termios termios;
	299	char buf[80];
	300	char c;
	301	int fd;
	302	va_list args;
	303	va_start(args, fmt);
	304	vsprintf(buf, fmt, args);
	305	va_end(args);
	306	fd = sys_open("/dev/root", O_RDWR \| O_NDELAY, 0);
	307	if (fd >= 0) {
	308	sys_ioctl(fd, FDEJECT, 0);
	309	sys_close(fd);
	310	}
	311	printk(KERN_NOTICE "VFS: Insert %s and press ENTER\n", buf);
	312	fd = sys_open("/dev/console", O_RDWR, 0);
	313	if (fd >= 0) {
	314	sys_ioctl(fd, TCGETS, (long)&termios);
	315	termios.c_lflag &= ~ICANON;
	316	sys_ioctl(fd, TCSETSF, (long)&termios);
	317	sys_read(fd, &c, 1);
	318	termios.c_lflag \|= ICANON;
	319	sys_ioctl(fd, TCSETSF, (long)&termios);
	320	sys_close(fd);
	321	}
	322	}
	323	#endif
	324
	325	void __init mount_root(void)
	326	{
	327	#ifdef CONFIG_ROOT_NFS
	328	if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) {
	329	if (mount_nfs_root())
	330	return;
	331
	332	printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n");
	333	ROOT_DEV = Root_FD0;
	334	}
	335	#endif
	336	#ifdef CONFIG_BLK_DEV_FD
	337	if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) {
	338	/* rd_doload is 2 for a dual initrd/ramload setup */
	339	if (rd_doload==2) {
	340	if (rd_load_disk(1)) {
	341	ROOT_DEV = Root_RAM1;
	342	root_device_name = NULL;
	343	}
	344	} else
	345	change_floppy("root floppy");
	346	}
	347	#endif
9361401e	348	#ifdef CONFIG_BLOCK
bdaf8529	349	create_dev("/dev/root", ROOT_DEV);
1da177e4	350	mount_block_root("/dev/root", root_mountflags);
9361401e	351	#endif
1da177e4 LT	352	}
	353
	354	/*
	355	* Prepare the namespace - decide what/where to mount, load ramdisks, etc.
	356	*/
	357	void __init prepare_namespace(void)
	358	{
	359	int is_floppy;
	360
1da177e4 LT	361	if (root_delay) {
	362	printk(KERN_INFO "Waiting %dsec before mounting root device...\n",
	363	root_delay);
	364	ssleep(root_delay);
	365	}
	366
d779249e GKH	367	/* wait for the known devices to complete their probing */
	368	while (driver_probe_done() != 0)
	369	msleep(100);
	370
1da177e4 LT	371	md_run_setup();
	372
	373	if (saved_root_name[0]) {
	374	root_device_name = saved_root_name;
2d62f488 AH	375	if (!strncmp(root_device_name, "mtd", 3) \|\|
2d62f488 AH	376	!strncmp(root_device_name, "ubi", 3)) {
e9482b43 JE	377	mount_block_root(root_device_name, root_mountflags);
	378	goto out;
	379	}
1da177e4 LT	380	ROOT_DEV = name_to_dev_t(root_device_name);
	381	if (strncmp(root_device_name, "/dev/", 5) == 0)
	382	root_device_name += 5;
	383	}
	384
1da177e4 LT	385	if (initrd_load())
	386	goto out;
	387
cc1ed754 PO	388	/* wait for any asynchronous scanning to complete */
	389	if ((ROOT_DEV == 0) && root_wait) {
	390	printk(KERN_INFO "Waiting for root device %s...\n",
	391	saved_root_name);
	392	while (driver_probe_done() != 0 \|\|
	393	(ROOT_DEV = name_to_dev_t(saved_root_name)) == 0)
	394	msleep(100);
	395	}
	396
	397	is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR;
	398
1da177e4 LT	399	if (is_floppy && rd_doload && rd_load_disk(0))
	400	ROOT_DEV = Root_RAM0;
	401
	402	mount_root();
	403	out:
1da177e4 LT	404	sys_mount(".", "/", NULL, MS_MOVE, NULL);
1da177e4 LT	405	sys_chroot(".");
1da177e4 LT	406	}
1da177e4 LT	407