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

#include "do_mounts.h"

extern int get_filesystem_list(char * buf);

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];

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);

static dev_t try_name(char *name, int part)
{
	char path[64];
	char buf[32];
	int range;
	dev_t res;
	char *s;
	int len;
	int fd;
	unsigned int maj, min;

	/* read device number from .../dev */

	sprintf(path, "/sys/block/%s/dev", name);
	fd = sys_open(path, 0, 0);
	if (fd < 0)
		goto fail;
	len = sys_read(fd, buf, 32);
	sys_close(fd);
	if (len <= 0 || len == 32 || buf[len - 1] != '\n')
		goto fail;
	buf[len - 1] = '\0';
	if (sscanf(buf, "%u:%u", &maj, &min) == 2) {
		/*
		 * Try the %u:%u format -- see print_dev_t()
		 */
		res = MKDEV(maj, min);
		if (maj != MAJOR(res) || min != MINOR(res))
			goto fail;
	} else {
		/*
		 * Nope.  Try old-style "0321"
		 */
		res = new_decode_dev(simple_strtoul(buf, &s, 16));
		if (*s)
			goto fail;
	}

	/* if it's there and we are not looking for a partition - that's it */
	if (!part)
		return res;

	/* otherwise read range from .../range */
	sprintf(path, "/sys/block/%s/range", name);
	fd = sys_open(path, 0, 0);
	if (fd < 0)
		goto fail;
	len = sys_read(fd, buf, 32);
	sys_close(fd);
	if (len <= 0 || len == 32 || buf[len - 1] != '\n')
		goto fail;
	buf[len - 1] = '\0';
	range = simple_strtoul(buf, &s, 10);
	if (*s)
		goto fail;

	/* if partition is within range - we got it */
	if (part < range)
		return res + part;
fail:
	return 0;
}

/*
 *	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.
 *	Sysfs is used to check if something is a disk name - it has
 *	all known disks under bus/block/devices.  If the disk name
 *	contains slashes, name of sysfs node has them replaced with
 *	bangs.  try_name() does the actual checks, assuming that sysfs
 *	is mounted on rootfs /sys.
 */

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

#ifdef CONFIG_SYSFS
	int mkdir_err = sys_mkdir("/sys", 0700);
	if (sys_mount("sysfs", "/sys", "sysfs", 0, NULL) < 0)
		goto out;
#endif

	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 = try_name(s, 0);
	if (res)
		goto done;

	while (p > s && isdigit(p[-1]))
		p--;
	if (p == s || !*p || *p == '0')
		goto fail;
	part = simple_strtoul(p, NULL, 10);
	*p = '\0';
	res = try_name(s, part);
	if (res)
		goto done;

	if (p < s + 2 || !isdigit(p[-2]) || p[-1] != 'p')
		goto fail;
	p[-1] = '\0';
	res = try_name(s, part);
done:
#ifdef CONFIG_SYSFS
	sys_umount("/sys", 0);
out:
	if (!mkdir_err)
		sys_rmdir("/sys");
#endif
	return res;
fail:
	res = 0;
	goto done;
}

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 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->pwdmnt->mnt_sb->s_dev;
	printk("VFS: Mounted root (%s filesystem)%s.\n",
	       current->fs->pwdmnt->mnt_sb->s_type->name,
	       current->fs->pwdmnt->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)) {
			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;
	}

	is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR;

	if (initrd_load())
		goto out;

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

	mount_root();
out:
	sys_mount(".", "/", NULL, MS_MOVE, NULL);
	sys_chroot(".");
	security_sb_post_mountroot();
}
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>
1da177e4 LT	14
	15	#include <linux/nfs_fs.h>
	16	#include <linux/nfs_fs_sb.h>
	17	#include <linux/nfs_mount.h>
	18
	19	#include "do_mounts.h"
	20
	21	extern int get_filesystem_list(char * buf);
	22
	23	int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */
	24
9b04c997	25	int root_mountflags = MS_RDONLY \| MS_SILENT;
1da177e4 LT	26	char * __initdata root_device_name;
	27	static char __initdata saved_root_name[64];
	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
	57	static dev_t try_name(char *name, int part)
	58	{
	59	char path[64];
	60	char buf[32];
	61	int range;
	62	dev_t res;
	63	char *s;
	64	int len;
	65	int fd;
	66	unsigned int maj, min;
	67
	68	/* read device number from .../dev */
	69
	70	sprintf(path, "/sys/block/%s/dev", name);
	71	fd = sys_open(path, 0, 0);
	72	if (fd < 0)
	73	goto fail;
	74	len = sys_read(fd, buf, 32);
	75	sys_close(fd);
	76	if (len <= 0 \|\| len == 32 \|\| buf[len - 1] != '\n')
	77	goto fail;
	78	buf[len - 1] = '\0';
	79	if (sscanf(buf, "%u:%u", &maj, &min) == 2) {
	80	/*
	81	* Try the %u:%u format -- see print_dev_t()
	82	*/
	83	res = MKDEV(maj, min);
	84	if (maj != MAJOR(res) \|\| min != MINOR(res))
	85	goto fail;
	86	} else {
	87	/*
	88	* Nope. Try old-style "0321"
	89	*/
	90	res = new_decode_dev(simple_strtoul(buf, &s, 16));
	91	if (*s)
	92	goto fail;
	93	}
	94
95	/* if it's there and we are not looking for a partition - that's it */
96	if (!part)
97	return res;
98
99	/* otherwise read range from .../range */
100	sprintf(path, "/sys/block/%s/range", name);
101	fd = sys_open(path, 0, 0);
102	if (fd < 0)
103	goto fail;
104	len = sys_read(fd, buf, 32);
105	sys_close(fd);
106	if (len <= 0 \|\| len == 32 \|\| buf[len - 1] != '\n')
107	goto fail;
108	buf[len - 1] = '\0';
109	range = simple_strtoul(buf, &s, 10);
110	if (*s)
111	goto fail;
112
113	/* if partition is within range - we got it */
114	if (part < range)
115	return res + part;
116	fail:
117	return 0;
118	}
119
120	/*
121	* Convert a name into device number. We accept the following variants:
122	*
123	* 1) device number in hexadecimal represents itself
124	* 2) /dev/nfs represents Root_NFS (0xff)
125	* 3) /dev/<disk_name> represents the device number of disk
126	* 4) /dev/<disk_name><decimal> represents the device number
127	* of partition - device number of disk plus the partition number
128	* 5) /dev/<disk_name>p<decimal> - same as the above, that form is
129	* used when disk name of partitioned disk ends on a digit.
130	*
131	* If name doesn't have fall into the categories above, we return 0.
13ae6d81	132	* Sysfs is used to check if something is a disk name - it has
1da177e4	133	* all known disks under bus/block/devices. If the disk name
13ae6d81 REB	134	* contains slashes, name of sysfs node has them replaced with
13ae6d81 REB	135	* bangs. try_name() does the actual checks, assuming that sysfs
1da177e4 LT	136	* is mounted on rootfs /sys.
	137	*/
	138
	139	dev_t name_to_dev_t(char *name)
	140	{
	141	char s[32];
	142	char *p;
	143	dev_t res = 0;
	144	int part;
	145
	146	#ifdef CONFIG_SYSFS
	147	int mkdir_err = sys_mkdir("/sys", 0700);
	148	if (sys_mount("sysfs", "/sys", "sysfs", 0, NULL) < 0)
	149	goto out;
	150	#endif
	151
	152	if (strncmp(name, "/dev/", 5) != 0) {
	153	unsigned maj, min;
	154
	155	if (sscanf(name, "%u:%u", &maj, &min) == 2) {
	156	res = MKDEV(maj, min);
	157	if (maj != MAJOR(res) \|\| min != MINOR(res))
	158	goto fail;
	159	} else {
	160	res = new_decode_dev(simple_strtoul(name, &p, 16));
	161	if (*p)
	162	goto fail;
	163	}
	164	goto done;
	165	}
	166	name += 5;
	167	res = Root_NFS;
	168	if (strcmp(name, "nfs") == 0)
	169	goto done;
	170	res = Root_RAM0;
	171	if (strcmp(name, "ram") == 0)
	172	goto done;
	173
	174	if (strlen(name) > 31)
	175	goto fail;
	176	strcpy(s, name);
	177	for (p = s; *p; p++)
	178	if (*p == '/')
	179	*p = '!';
	180	res = try_name(s, 0);
	181	if (res)
	182	goto done;
	183
	184	while (p > s && isdigit(p[-1]))
	185	p--;
	186	if (p == s \|\| !p \|\| p == '0')
	187	goto fail;
	188	part = simple_strtoul(p, NULL, 10);
	189	*p = '\0';
	190	res = try_name(s, part);
	191	if (res)
	192	goto done;
	193
	194	if (p < s + 2 \|\| !isdigit(p[-2]) \|\| p[-1] != 'p')
	195	goto fail;
	196	p[-1] = '\0';
	197	res = try_name(s, part);
	198	done:
	199	#ifdef CONFIG_SYSFS
200	sys_umount("/sys", 0);
201	out:
202	if (!mkdir_err)
203	sys_rmdir("/sys");
204	#endif
205	return res;
206	fail:
207	res = 0;
208	goto done;
209	}
210
211	static int __init root_dev_setup(char *line)
212	{
213	strlcpy(saved_root_name, line, sizeof(saved_root_name));
214	return 1;
215	}
216
217	__setup("root=", root_dev_setup);
218
219	static char * __initdata root_mount_data;
220	static int __init root_data_setup(char *str)
221	{
222	root_mount_data = str;
223	return 1;
224	}
225
226	static char * __initdata root_fs_names;
227	static int __init fs_names_setup(char *str)
228	{
229	root_fs_names = str;
230	return 1;
231	}
232
233	static unsigned int __initdata root_delay;
234	static int __init root_delay_setup(char *str)
235	{
236	root_delay = simple_strtoul(str, NULL, 0);
237	return 1;
238	}
239
240	__setup("rootflags=", root_data_setup);
241	__setup("rootfstype=", fs_names_setup);
242	__setup("rootdelay=", root_delay_setup);
243
244	static void __init get_fs_names(char *page)
245	{
246	char *s = page;
247
248	if (root_fs_names) {
249	strcpy(page, root_fs_names);
250	while (*s++) {
251	if (s[-1] == ',')
252	s[-1] = '\0';
253	}
254	} else {
255	int len = get_filesystem_list(page);
256	char p, next;
257
258	page[len] = '\0';
259	for (p = page-1; p; p = next) {
260	next = strchr(++p, '\n');
261	if (*p++ != '\t')
262	continue;
263	while ((s++ = p++) != '\n')
264	;
265	s[-1] = '\0';
266	}
267	}
268	*s = '\0';
269	}
270
271	static int __init do_mount_root(char name, char fs, int flags, void *data)
272	{
273	int err = sys_mount(name, "/root", fs, flags, data);
274	if (err)
275	return err;
276
277	sys_chdir("/root");
278	ROOT_DEV = current->fs->pwdmnt->mnt_sb->s_dev;
279	printk("VFS: Mounted root (%s filesystem)%s.\n",
280	current->fs->pwdmnt->mnt_sb->s_type->name,
281	current->fs->pwdmnt->mnt_sb->s_flags & MS_RDONLY ?
282	" readonly" : "");
283	return 0;
284	}
285
286	void __init mount_block_root(char *name, int flags)
287	{
288	char *fs_names = __getname();
289	char *p;
9361401e	290	#ifdef CONFIG_BLOCK
1da177e4	291	char b[BDEVNAME_SIZE];
9361401e DH	292	#else
	293	const char *b = name;
	294	#endif
1da177e4 LT	295
	296	get_fs_names(fs_names);
	297	retry:
	298	for (p = fs_names; *p; p += strlen(p)+1) {
	299	int err = do_mount_root(name, p, flags, root_mount_data);
	300	switch (err) {
	301	case 0:
	302	goto out;
	303	case -EACCES:
	304	flags \|= MS_RDONLY;
	305	goto retry;
	306	case -EINVAL:
	307	continue;
	308	}
	309	/*
	310	* Allow the user to distinguish between failed sys_open
	311	* and bad superblock on root device.
dd2a345f	312	* and give them a list of the available devices
1da177e4	313	*/
9361401e	314	#ifdef CONFIG_BLOCK
1da177e4	315	__bdevname(ROOT_DEV, b);
9361401e	316	#endif
1da177e4 LT	317	printk("VFS: Cannot open root device \"%s\" or %s\n",
1da177e4 LT	318	root_device_name, b);
dd2a345f	319	printk("Please append a correct \"root=\" boot option; here are the available partitions:\n");
1da177e4	320
dd2a345f	321	printk_all_partitions();
1da177e4 LT	322	panic("VFS: Unable to mount root fs on %s", b);
1da177e4 LT	323	}
be6e028b	324
dd2a345f DG	325	printk("List of all partitions:\n");
dd2a345f DG	326	printk_all_partitions();
be6e028b AW	327	printk("No filesystem could mount root, tried: ");
	328	for (p = fs_names; *p; p += strlen(p)+1)
	329	printk(" %s", p);
	330	printk("\n");
9361401e DH	331	#ifdef CONFIG_BLOCK
	332	__bdevname(ROOT_DEV, b);
	333	#endif
	334	panic("VFS: Unable to mount root fs on %s", b);
1da177e4 LT	335	out:
	336	putname(fs_names);
	337	}
	338
	339	#ifdef CONFIG_ROOT_NFS
	340	static int __init mount_nfs_root(void)
	341	{
	342	void *data = nfs_root_data();
	343
bdaf8529	344	create_dev("/dev/root", ROOT_DEV);
1da177e4 LT	345	if (data &&
	346	do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0)
	347	return 1;
	348	return 0;
	349	}
	350	#endif
	351
	352	#if defined(CONFIG_BLK_DEV_RAM) \|\| defined(CONFIG_BLK_DEV_FD)
	353	void __init change_floppy(char *fmt, ...)
	354	{
	355	struct termios termios;
	356	char buf[80];
	357	char c;
	358	int fd;
	359	va_list args;
	360	va_start(args, fmt);
	361	vsprintf(buf, fmt, args);
	362	va_end(args);
	363	fd = sys_open("/dev/root", O_RDWR \| O_NDELAY, 0);
	364	if (fd >= 0) {
	365	sys_ioctl(fd, FDEJECT, 0);
	366	sys_close(fd);
	367	}
	368	printk(KERN_NOTICE "VFS: Insert %s and press ENTER\n", buf);
	369	fd = sys_open("/dev/console", O_RDWR, 0);
	370	if (fd >= 0) {
	371	sys_ioctl(fd, TCGETS, (long)&termios);
	372	termios.c_lflag &= ~ICANON;
	373	sys_ioctl(fd, TCSETSF, (long)&termios);
	374	sys_read(fd, &c, 1);
	375	termios.c_lflag \|= ICANON;
	376	sys_ioctl(fd, TCSETSF, (long)&termios);
	377	sys_close(fd);
	378	}
	379	}
	380	#endif
	381
	382	void __init mount_root(void)
	383	{
	384	#ifdef CONFIG_ROOT_NFS
	385	if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) {
	386	if (mount_nfs_root())
	387	return;
	388
	389	printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n");
	390	ROOT_DEV = Root_FD0;
	391	}
	392	#endif
	393	#ifdef CONFIG_BLK_DEV_FD
	394	if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) {
	395	/* rd_doload is 2 for a dual initrd/ramload setup */
	396	if (rd_doload==2) {
	397	if (rd_load_disk(1)) {
	398	ROOT_DEV = Root_RAM1;
	399	root_device_name = NULL;
	400	}
	401	} else
	402	change_floppy("root floppy");
	403	}
	404	#endif
9361401e	405	#ifdef CONFIG_BLOCK
bdaf8529	406	create_dev("/dev/root", ROOT_DEV);
1da177e4	407	mount_block_root("/dev/root", root_mountflags);
9361401e	408	#endif
1da177e4 LT	409	}
	410
	411	/*
	412	* Prepare the namespace - decide what/where to mount, load ramdisks, etc.
	413	*/
	414	void __init prepare_namespace(void)
	415	{
	416	int is_floppy;
	417
1da177e4 LT	418	if (root_delay) {
	419	printk(KERN_INFO "Waiting %dsec before mounting root device...\n",
	420	root_delay);
	421	ssleep(root_delay);
	422	}
	423
d779249e GKH	424	/* wait for the known devices to complete their probing */
	425	while (driver_probe_done() != 0)
	426	msleep(100);
	427
1da177e4 LT	428	md_run_setup();
	429
	430	if (saved_root_name[0]) {
	431	root_device_name = saved_root_name;
e9482b43 JE	432	if (!strncmp(root_device_name, "mtd", 3)) {
	433	mount_block_root(root_device_name, root_mountflags);
	434	goto out;
	435	}
1da177e4 LT	436	ROOT_DEV = name_to_dev_t(root_device_name);
	437	if (strncmp(root_device_name, "/dev/", 5) == 0)
	438	root_device_name += 5;
	439	}
	440
	441	is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR;
	442
	443	if (initrd_load())
	444	goto out;
	445
	446	if (is_floppy && rd_doload && rd_load_disk(0))
	447	ROOT_DEV = Root_RAM0;
	448
	449	mount_root();
	450	out:
1da177e4 LT	451	sys_mount(".", "/", NULL, MS_MOVE, NULL);
	452	sys_chroot(".");
	453	security_sb_post_mountroot();
1da177e4 LT	454	}
1da177e4 LT	455