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