[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/initrd.h>
#include <linux/async.h>
#include <linux/fs_struct.h>
#include <linux/slab.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;
static 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 on device %u:%u.\n",
	       current->fs->pwd.mnt->mnt_sb->s_type->name,
	       current->fs->pwd.mnt->mnt_sb->s_flags & MS_RDONLY ?
	       " readonly" : "", MAJOR(ROOT_DEV), MINOR(ROOT_DEV));
	return 0;
}

void __init mount_block_root(char *name, int flags)
{
	char *fs_names = __getname_gfp(GFP_KERNEL
		| __GFP_NOTRACK_FALSE_POSITIVE);
	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();
#ifdef CONFIG_DEBUG_BLOCK_EXT_DEVT
		printk("DEBUG_BLOCK_EXT_DEVT is enabled, you need to specify "
		       "explicit textual name for \"root=\" boot option.\n");
#endif
		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)
{
	char *root_dev, *root_data;

	if (nfs_root_data(&root_dev, &root_data) != 0)
		return 0;
	if (do_mount_root(root_dev, "nfs", root_mountflags, root_data) != 0)
		return 0;
	return 1;
}
#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
	 *
	 * Note: this is a potential source of long boot delays.
	 * For example, it is not atypical to wait 5 seconds here
	 * for the touchpad of a laptop to initialize.
	 */
	wait_for_device_probe();

	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);
		async_synchronize_full();
	}

	is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR;

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

	mount_root();
out:
	devtmpfs_mount("dev");
	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>
82c8253a	15	#include <linux/initrd.h>
22a9d645	16	#include <linux/async.h>
5ad4e53b	17	#include <linux/fs_struct.h>
5a0e3ad6	18	#include <linux/slab.h>
1da177e4 LT	19
	20	#include <linux/nfs_fs.h>
	21	#include <linux/nfs_fs_sb.h>
	22	#include <linux/nfs_mount.h>
	23
	24	#include "do_mounts.h"
	25
1da177e4 LT	26	int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */
1da177e4 LT	27
9b04c997	28	int root_mountflags = MS_RDONLY \| MS_SILENT;
f56f6d30	29	static char * __initdata root_device_name;
1da177e4	30	static char __initdata saved_root_name[64];
cc1ed754	31	static int __initdata root_wait;
1da177e4	32
1da177e4 LT	33	dev_t ROOT_DEV;
1da177e4 LT	34
1da177e4 LT	35	static int __init load_ramdisk(char *str)
	36	{
	37	rd_doload = simple_strtol(str,NULL,0) & 3;
	38	return 1;
	39	}
	40	__setup("load_ramdisk=", load_ramdisk);
	41
	42	static int __init readonly(char *str)
	43	{
	44	if (*str)
	45	return 0;
	46	root_mountflags \|= MS_RDONLY;
	47	return 1;
	48	}
	49
	50	static int __init readwrite(char *str)
	51	{
	52	if (*str)
	53	return 0;
	54	root_mountflags &= ~MS_RDONLY;
	55	return 1;
	56	}
	57
	58	__setup("ro", readonly);
	59	__setup("rw", readwrite);
	60
1da177e4 LT	61	/*
	62	* Convert a name into device number. We accept the following variants:
	63	*
	64	* 1) device number in hexadecimal represents itself
	65	* 2) /dev/nfs represents Root_NFS (0xff)
	66	* 3) /dev/<disk_name> represents the device number of disk
	67	* 4) /dev/<disk_name><decimal> represents the device number
	68	* of partition - device number of disk plus the partition number
	69	* 5) /dev/<disk_name>p<decimal> - same as the above, that form is
	70	* used when disk name of partitioned disk ends on a digit.
	71	*
edfaa7c3 KS	72	* If name doesn't have fall into the categories above, we return (0,0).
	73	* block_class is used to check if something is a disk name. If the disk
	74	* name contains slashes, the device name has them replaced with
	75	* bangs.
1da177e4 LT	76	*/
	77
	78	dev_t name_to_dev_t(char *name)
	79	{
	80	char s[32];
	81	char *p;
	82	dev_t res = 0;
30f2f0eb	83	int part;
1da177e4 LT	84
	85	if (strncmp(name, "/dev/", 5) != 0) {
	86	unsigned maj, min;
	87
	88	if (sscanf(name, "%u:%u", &maj, &min) == 2) {
	89	res = MKDEV(maj, min);
	90	if (maj != MAJOR(res) \|\| min != MINOR(res))
	91	goto fail;
	92	} else {
	93	res = new_decode_dev(simple_strtoul(name, &p, 16));
	94	if (*p)
	95	goto fail;
	96	}
	97	goto done;
	98	}
edfaa7c3	99
1da177e4 LT	100	name += 5;
	101	res = Root_NFS;
	102	if (strcmp(name, "nfs") == 0)
	103	goto done;
	104	res = Root_RAM0;
	105	if (strcmp(name, "ram") == 0)
	106	goto done;
	107
	108	if (strlen(name) > 31)
	109	goto fail;
	110	strcpy(s, name);
	111	for (p = s; *p; p++)
	112	if (*p == '/')
	113	*p = '!';
30f2f0eb KS	114	res = blk_lookup_devt(s, 0);
	115	if (res)
	116	goto done;
	117
	118	/*
	119	* try non-existant, but valid partition, which may only exist
	120	* after revalidating the disk, like partitioned md devices
	121	*/
	122	while (p > s && isdigit(p[-1]))
	123	p--;
	124	if (p == s \|\| !p \|\| p == '0')
	125	goto fail;
	126
	127	/* try disk name without <part number> */
	128	part = simple_strtoul(p, NULL, 10);
	129	*p = '\0';
	130	res = blk_lookup_devt(s, part);
	131	if (res)
	132	goto done;
	133
	134	/* try disk name without p<part number> */
	135	if (p < s + 2 \|\| !isdigit(p[-2]) \|\| p[-1] != 'p')
	136	goto fail;
	137	p[-1] = '\0';
	138	res = blk_lookup_devt(s, part);
1da177e4 LT	139	if (res)
	140	goto done;
	141
edfaa7c3 KS	142	fail:
edfaa7c3 KS	143	return 0;
1da177e4	144	done:
1da177e4	145	return res;
1da177e4 LT	146	}
	147
	148	static int __init root_dev_setup(char *line)
	149	{
	150	strlcpy(saved_root_name, line, sizeof(saved_root_name));
	151	return 1;
	152	}
	153
	154	__setup("root=", root_dev_setup);
	155
cc1ed754 PO	156	static int __init rootwait_setup(char *str)
	157	{
	158	if (*str)
	159	return 0;
	160	root_wait = 1;
	161	return 1;
	162	}
	163
	164	__setup("rootwait", rootwait_setup);
	165
1da177e4 LT	166	static char * __initdata root_mount_data;
	167	static int __init root_data_setup(char *str)
	168	{
	169	root_mount_data = str;
	170	return 1;
	171	}
	172
	173	static char * __initdata root_fs_names;
	174	static int __init fs_names_setup(char *str)
	175	{
	176	root_fs_names = str;
	177	return 1;
	178	}
	179
	180	static unsigned int __initdata root_delay;
	181	static int __init root_delay_setup(char *str)
	182	{
	183	root_delay = simple_strtoul(str, NULL, 0);
	184	return 1;
	185	}
	186
	187	__setup("rootflags=", root_data_setup);
	188	__setup("rootfstype=", fs_names_setup);
	189	__setup("rootdelay=", root_delay_setup);
	190
	191	static void __init get_fs_names(char *page)
	192	{
	193	char *s = page;
	194
	195	if (root_fs_names) {
	196	strcpy(page, root_fs_names);
	197	while (*s++) {
	198	if (s[-1] == ',')
	199	s[-1] = '\0';
	200	}
	201	} else {
	202	int len = get_filesystem_list(page);
	203	char p, next;
	204
	205	page[len] = '\0';
	206	for (p = page-1; p; p = next) {
	207	next = strchr(++p, '\n');
	208	if (*p++ != '\t')
	209	continue;
	210	while ((s++ = p++) != '\n')
	211	;
	212	s[-1] = '\0';
	213	}
	214	}
	215	*s = '\0';
	216	}
	217
	218	static int __init do_mount_root(char name, char fs, int flags, void *data)
	219	{
	220	int err = sys_mount(name, "/root", fs, flags, data);
	221	if (err)
	222	return err;
	223
	224	sys_chdir("/root");
6ac08c39	225	ROOT_DEV = current->fs->pwd.mnt->mnt_sb->s_dev;
bca1033b	226	printk("VFS: Mounted root (%s filesystem)%s on device %u:%u.\n",
6ac08c39 JB	227	current->fs->pwd.mnt->mnt_sb->s_type->name,
6ac08c39 JB	228	current->fs->pwd.mnt->mnt_sb->s_flags & MS_RDONLY ?
bca1033b	229	" readonly" : "", MAJOR(ROOT_DEV), MINOR(ROOT_DEV));
1da177e4 LT	230	return 0;
	231	}
	232
	233	void __init mount_block_root(char *name, int flags)
	234	{
3b5c760e VN	235	char *fs_names = __getname_gfp(GFP_KERNEL
3b5c760e VN	236	\| __GFP_NOTRACK_FALSE_POSITIVE);
1da177e4	237	char *p;
9361401e	238	#ifdef CONFIG_BLOCK
1da177e4	239	char b[BDEVNAME_SIZE];
9361401e DH	240	#else
	241	const char *b = name;
	242	#endif
1da177e4 LT	243
	244	get_fs_names(fs_names);
	245	retry:
	246	for (p = fs_names; *p; p += strlen(p)+1) {
	247	int err = do_mount_root(name, p, flags, root_mount_data);
	248	switch (err) {
	249	case 0:
	250	goto out;
	251	case -EACCES:
	252	flags \|= MS_RDONLY;
	253	goto retry;
	254	case -EINVAL:
	255	continue;
	256	}
	257	/*
	258	* Allow the user to distinguish between failed sys_open
	259	* and bad superblock on root device.
dd2a345f	260	* and give them a list of the available devices
1da177e4	261	*/
9361401e	262	#ifdef CONFIG_BLOCK
1da177e4	263	__bdevname(ROOT_DEV, b);
9361401e	264	#endif
1da177e4 LT	265	printk("VFS: Cannot open root device \"%s\" or %s\n",
1da177e4 LT	266	root_device_name, b);
dd2a345f	267	printk("Please append a correct \"root=\" boot option; here are the available partitions:\n");
1da177e4	268
dd2a345f	269	printk_all_partitions();
55dc7db7 TH	270	#ifdef CONFIG_DEBUG_BLOCK_EXT_DEVT
	271	printk("DEBUG_BLOCK_EXT_DEVT is enabled, you need to specify "
	272	"explicit textual name for \"root=\" boot option.\n");
	273	#endif
1da177e4 LT	274	panic("VFS: Unable to mount root fs on %s", b);
1da177e4 LT	275	}
be6e028b	276
dd2a345f DG	277	printk("List of all partitions:\n");
dd2a345f DG	278	printk_all_partitions();
be6e028b AW	279	printk("No filesystem could mount root, tried: ");
	280	for (p = fs_names; *p; p += strlen(p)+1)
	281	printk(" %s", p);
	282	printk("\n");
9361401e DH	283	#ifdef CONFIG_BLOCK
	284	__bdevname(ROOT_DEV, b);
	285	#endif
	286	panic("VFS: Unable to mount root fs on %s", b);
1da177e4 LT	287	out:
	288	putname(fs_names);
	289	}
	290
	291	#ifdef CONFIG_ROOT_NFS
	292	static int __init mount_nfs_root(void)
	293	{
56463e50	294	char root_dev, root_data;
1da177e4	295
56463e50 CL	296	if (nfs_root_data(&root_dev, &root_data) != 0)
	297	return 0;
	298	if (do_mount_root(root_dev, "nfs", root_mountflags, root_data) != 0)
	299	return 0;
	300	return 1;
1da177e4 LT	301	}
	302	#endif
	303
	304	#if defined(CONFIG_BLK_DEV_RAM) \|\| defined(CONFIG_BLK_DEV_FD)
	305	void __init change_floppy(char *fmt, ...)
	306	{
	307	struct termios termios;
	308	char buf[80];
	309	char c;
	310	int fd;
	311	va_list args;
	312	va_start(args, fmt);
	313	vsprintf(buf, fmt, args);
	314	va_end(args);
	315	fd = sys_open("/dev/root", O_RDWR \| O_NDELAY, 0);
	316	if (fd >= 0) {
	317	sys_ioctl(fd, FDEJECT, 0);
	318	sys_close(fd);
	319	}
	320	printk(KERN_NOTICE "VFS: Insert %s and press ENTER\n", buf);
	321	fd = sys_open("/dev/console", O_RDWR, 0);
	322	if (fd >= 0) {
	323	sys_ioctl(fd, TCGETS, (long)&termios);
	324	termios.c_lflag &= ~ICANON;
	325	sys_ioctl(fd, TCSETSF, (long)&termios);
	326	sys_read(fd, &c, 1);
	327	termios.c_lflag \|= ICANON;
	328	sys_ioctl(fd, TCSETSF, (long)&termios);
	329	sys_close(fd);
	330	}
	331	}
	332	#endif
	333
	334	void __init mount_root(void)
	335	{
	336	#ifdef CONFIG_ROOT_NFS
	337	if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) {
	338	if (mount_nfs_root())
	339	return;
	340
	341	printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n");
	342	ROOT_DEV = Root_FD0;
	343	}
	344	#endif
	345	#ifdef CONFIG_BLK_DEV_FD
	346	if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) {
	347	/* rd_doload is 2 for a dual initrd/ramload setup */
	348	if (rd_doload==2) {
	349	if (rd_load_disk(1)) {
	350	ROOT_DEV = Root_RAM1;
	351	root_device_name = NULL;
	352	}
	353	} else
	354	change_floppy("root floppy");
	355	}
	356	#endif
9361401e	357	#ifdef CONFIG_BLOCK
bdaf8529	358	create_dev("/dev/root", ROOT_DEV);
1da177e4	359	mount_block_root("/dev/root", root_mountflags);
9361401e	360	#endif
1da177e4 LT	361	}
	362
	363	/*
	364	* Prepare the namespace - decide what/where to mount, load ramdisks, etc.
	365	*/
	366	void __init prepare_namespace(void)
	367	{
	368	int is_floppy;
	369
1da177e4 LT	370	if (root_delay) {
	371	printk(KERN_INFO "Waiting %dsec before mounting root device...\n",
	372	root_delay);
	373	ssleep(root_delay);
	374	}
	375
216773a7 AV	376	/*
	377	* wait for the known devices to complete their probing
	378	*
	379	* Note: this is a potential source of long boot delays.
	380	* For example, it is not atypical to wait 5 seconds here
	381	* for the touchpad of a laptop to initialize.
	382	*/
	383	wait_for_device_probe();
d779249e	384
1da177e4 LT	385	md_run_setup();
	386
	387	if (saved_root_name[0]) {
	388	root_device_name = saved_root_name;
2d62f488 AH	389	if (!strncmp(root_device_name, "mtd", 3) \|\|
2d62f488 AH	390	!strncmp(root_device_name, "ubi", 3)) {
e9482b43 JE	391	mount_block_root(root_device_name, root_mountflags);
	392	goto out;
	393	}
1da177e4 LT	394	ROOT_DEV = name_to_dev_t(root_device_name);
	395	if (strncmp(root_device_name, "/dev/", 5) == 0)
	396	root_device_name += 5;
	397	}
	398
1da177e4 LT	399	if (initrd_load())
	400	goto out;
	401
cc1ed754 PO	402	/* wait for any asynchronous scanning to complete */
	403	if ((ROOT_DEV == 0) && root_wait) {
	404	printk(KERN_INFO "Waiting for root device %s...\n",
	405	saved_root_name);
	406	while (driver_probe_done() != 0 \|\|
	407	(ROOT_DEV = name_to_dev_t(saved_root_name)) == 0)
	408	msleep(100);
216773a7	409	async_synchronize_full();
cc1ed754 PO	410	}
	411
	412	is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR;
	413
1da177e4 LT	414	if (is_floppy && rd_doload && rd_load_disk(0))
	415	ROOT_DEV = Root_RAM0;
	416
	417	mount_root();
	418	out:
2b2af54a	419	devtmpfs_mount("dev");
1da177e4 LT	420	sys_mount(".", "/", NULL, MS_MOVE, NULL);
1da177e4 LT	421	sys_chroot(".");
1da177e4	422	}