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