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