11da177e4SLinus Torvalds #include <linux/module.h> 21da177e4SLinus Torvalds #include <linux/sched.h> 31da177e4SLinus Torvalds #include <linux/ctype.h> 41da177e4SLinus Torvalds #include <linux/fd.h> 51da177e4SLinus Torvalds #include <linux/tty.h> 61da177e4SLinus Torvalds #include <linux/suspend.h> 71da177e4SLinus Torvalds #include <linux/root_dev.h> 81da177e4SLinus Torvalds #include <linux/security.h> 91da177e4SLinus Torvalds #include <linux/delay.h> 10d53d9f16SAndrew Morton #include <linux/mount.h> 11d779249eSGreg Kroah-Hartman #include <linux/device.h> 1246595390SAdrian Bunk #include <linux/init.h> 131da177e4SLinus Torvalds 141da177e4SLinus Torvalds #include <linux/nfs_fs.h> 151da177e4SLinus Torvalds #include <linux/nfs_fs_sb.h> 161da177e4SLinus Torvalds #include <linux/nfs_mount.h> 171da177e4SLinus Torvalds 181da177e4SLinus Torvalds #include "do_mounts.h" 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds extern int get_filesystem_list(char * buf); 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */ 231da177e4SLinus Torvalds 249b04c997STheodore Ts'o int root_mountflags = MS_RDONLY | MS_SILENT; 251da177e4SLinus Torvalds char * __initdata root_device_name; 261da177e4SLinus Torvalds static char __initdata saved_root_name[64]; 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds dev_t ROOT_DEV; 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds static int __init load_ramdisk(char *str) 311da177e4SLinus Torvalds { 321da177e4SLinus Torvalds rd_doload = simple_strtol(str,NULL,0) & 3; 331da177e4SLinus Torvalds return 1; 341da177e4SLinus Torvalds } 351da177e4SLinus Torvalds __setup("load_ramdisk=", load_ramdisk); 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds static int __init readonly(char *str) 381da177e4SLinus Torvalds { 391da177e4SLinus Torvalds if (*str) 401da177e4SLinus Torvalds return 0; 411da177e4SLinus Torvalds root_mountflags |= MS_RDONLY; 421da177e4SLinus Torvalds return 1; 431da177e4SLinus Torvalds } 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds static int __init readwrite(char *str) 461da177e4SLinus Torvalds { 471da177e4SLinus Torvalds if (*str) 481da177e4SLinus Torvalds return 0; 491da177e4SLinus Torvalds root_mountflags &= ~MS_RDONLY; 501da177e4SLinus Torvalds return 1; 511da177e4SLinus Torvalds } 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds __setup("ro", readonly); 541da177e4SLinus Torvalds __setup("rw", readwrite); 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds static dev_t try_name(char *name, int part) 571da177e4SLinus Torvalds { 581da177e4SLinus Torvalds char path[64]; 591da177e4SLinus Torvalds char buf[32]; 601da177e4SLinus Torvalds int range; 611da177e4SLinus Torvalds dev_t res; 621da177e4SLinus Torvalds char *s; 631da177e4SLinus Torvalds int len; 641da177e4SLinus Torvalds int fd; 651da177e4SLinus Torvalds unsigned int maj, min; 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds /* read device number from .../dev */ 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds sprintf(path, "/sys/block/%s/dev", name); 701da177e4SLinus Torvalds fd = sys_open(path, 0, 0); 711da177e4SLinus Torvalds if (fd < 0) 721da177e4SLinus Torvalds goto fail; 731da177e4SLinus Torvalds len = sys_read(fd, buf, 32); 741da177e4SLinus Torvalds sys_close(fd); 751da177e4SLinus Torvalds if (len <= 0 || len == 32 || buf[len - 1] != '\n') 761da177e4SLinus Torvalds goto fail; 771da177e4SLinus Torvalds buf[len - 1] = '\0'; 781da177e4SLinus Torvalds if (sscanf(buf, "%u:%u", &maj, &min) == 2) { 791da177e4SLinus Torvalds /* 801da177e4SLinus Torvalds * Try the %u:%u format -- see print_dev_t() 811da177e4SLinus Torvalds */ 821da177e4SLinus Torvalds res = MKDEV(maj, min); 831da177e4SLinus Torvalds if (maj != MAJOR(res) || min != MINOR(res)) 841da177e4SLinus Torvalds goto fail; 851da177e4SLinus Torvalds } else { 861da177e4SLinus Torvalds /* 871da177e4SLinus Torvalds * Nope. Try old-style "0321" 881da177e4SLinus Torvalds */ 891da177e4SLinus Torvalds res = new_decode_dev(simple_strtoul(buf, &s, 16)); 901da177e4SLinus Torvalds if (*s) 911da177e4SLinus Torvalds goto fail; 921da177e4SLinus Torvalds } 931da177e4SLinus Torvalds 941da177e4SLinus Torvalds /* if it's there and we are not looking for a partition - that's it */ 951da177e4SLinus Torvalds if (!part) 961da177e4SLinus Torvalds return res; 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds /* otherwise read range from .../range */ 991da177e4SLinus Torvalds sprintf(path, "/sys/block/%s/range", name); 1001da177e4SLinus Torvalds fd = sys_open(path, 0, 0); 1011da177e4SLinus Torvalds if (fd < 0) 1021da177e4SLinus Torvalds goto fail; 1031da177e4SLinus Torvalds len = sys_read(fd, buf, 32); 1041da177e4SLinus Torvalds sys_close(fd); 1051da177e4SLinus Torvalds if (len <= 0 || len == 32 || buf[len - 1] != '\n') 1061da177e4SLinus Torvalds goto fail; 1071da177e4SLinus Torvalds buf[len - 1] = '\0'; 1081da177e4SLinus Torvalds range = simple_strtoul(buf, &s, 10); 1091da177e4SLinus Torvalds if (*s) 1101da177e4SLinus Torvalds goto fail; 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds /* if partition is within range - we got it */ 1131da177e4SLinus Torvalds if (part < range) 1141da177e4SLinus Torvalds return res + part; 1151da177e4SLinus Torvalds fail: 1161da177e4SLinus Torvalds return 0; 1171da177e4SLinus Torvalds } 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds /* 1201da177e4SLinus Torvalds * Convert a name into device number. We accept the following variants: 1211da177e4SLinus Torvalds * 1221da177e4SLinus Torvalds * 1) device number in hexadecimal represents itself 1231da177e4SLinus Torvalds * 2) /dev/nfs represents Root_NFS (0xff) 1241da177e4SLinus Torvalds * 3) /dev/<disk_name> represents the device number of disk 1251da177e4SLinus Torvalds * 4) /dev/<disk_name><decimal> represents the device number 1261da177e4SLinus Torvalds * of partition - device number of disk plus the partition number 1271da177e4SLinus Torvalds * 5) /dev/<disk_name>p<decimal> - same as the above, that form is 1281da177e4SLinus Torvalds * used when disk name of partitioned disk ends on a digit. 1291da177e4SLinus Torvalds * 1301da177e4SLinus Torvalds * If name doesn't have fall into the categories above, we return 0. 13113ae6d81SRolf Eike Beer * Sysfs is used to check if something is a disk name - it has 1321da177e4SLinus Torvalds * all known disks under bus/block/devices. If the disk name 13313ae6d81SRolf Eike Beer * contains slashes, name of sysfs node has them replaced with 13413ae6d81SRolf Eike Beer * bangs. try_name() does the actual checks, assuming that sysfs 1351da177e4SLinus Torvalds * is mounted on rootfs /sys. 1361da177e4SLinus Torvalds */ 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds dev_t name_to_dev_t(char *name) 1391da177e4SLinus Torvalds { 1401da177e4SLinus Torvalds char s[32]; 1411da177e4SLinus Torvalds char *p; 1421da177e4SLinus Torvalds dev_t res = 0; 1431da177e4SLinus Torvalds int part; 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds #ifdef CONFIG_SYSFS 1461da177e4SLinus Torvalds int mkdir_err = sys_mkdir("/sys", 0700); 1471da177e4SLinus Torvalds if (sys_mount("sysfs", "/sys", "sysfs", 0, NULL) < 0) 1481da177e4SLinus Torvalds goto out; 1491da177e4SLinus Torvalds #endif 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds if (strncmp(name, "/dev/", 5) != 0) { 1521da177e4SLinus Torvalds unsigned maj, min; 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds if (sscanf(name, "%u:%u", &maj, &min) == 2) { 1551da177e4SLinus Torvalds res = MKDEV(maj, min); 1561da177e4SLinus Torvalds if (maj != MAJOR(res) || min != MINOR(res)) 1571da177e4SLinus Torvalds goto fail; 1581da177e4SLinus Torvalds } else { 1591da177e4SLinus Torvalds res = new_decode_dev(simple_strtoul(name, &p, 16)); 1601da177e4SLinus Torvalds if (*p) 1611da177e4SLinus Torvalds goto fail; 1621da177e4SLinus Torvalds } 1631da177e4SLinus Torvalds goto done; 1641da177e4SLinus Torvalds } 1651da177e4SLinus Torvalds name += 5; 1661da177e4SLinus Torvalds res = Root_NFS; 1671da177e4SLinus Torvalds if (strcmp(name, "nfs") == 0) 1681da177e4SLinus Torvalds goto done; 1691da177e4SLinus Torvalds res = Root_RAM0; 1701da177e4SLinus Torvalds if (strcmp(name, "ram") == 0) 1711da177e4SLinus Torvalds goto done; 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds if (strlen(name) > 31) 1741da177e4SLinus Torvalds goto fail; 1751da177e4SLinus Torvalds strcpy(s, name); 1761da177e4SLinus Torvalds for (p = s; *p; p++) 1771da177e4SLinus Torvalds if (*p == '/') 1781da177e4SLinus Torvalds *p = '!'; 1791da177e4SLinus Torvalds res = try_name(s, 0); 1801da177e4SLinus Torvalds if (res) 1811da177e4SLinus Torvalds goto done; 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds while (p > s && isdigit(p[-1])) 1841da177e4SLinus Torvalds p--; 1851da177e4SLinus Torvalds if (p == s || !*p || *p == '0') 1861da177e4SLinus Torvalds goto fail; 1871da177e4SLinus Torvalds part = simple_strtoul(p, NULL, 10); 1881da177e4SLinus Torvalds *p = '\0'; 1891da177e4SLinus Torvalds res = try_name(s, part); 1901da177e4SLinus Torvalds if (res) 1911da177e4SLinus Torvalds goto done; 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds if (p < s + 2 || !isdigit(p[-2]) || p[-1] != 'p') 1941da177e4SLinus Torvalds goto fail; 1951da177e4SLinus Torvalds p[-1] = '\0'; 1961da177e4SLinus Torvalds res = try_name(s, part); 1971da177e4SLinus Torvalds done: 1981da177e4SLinus Torvalds #ifdef CONFIG_SYSFS 1991da177e4SLinus Torvalds sys_umount("/sys", 0); 2001da177e4SLinus Torvalds out: 2011da177e4SLinus Torvalds if (!mkdir_err) 2021da177e4SLinus Torvalds sys_rmdir("/sys"); 2031da177e4SLinus Torvalds #endif 2041da177e4SLinus Torvalds return res; 2051da177e4SLinus Torvalds fail: 2061da177e4SLinus Torvalds res = 0; 2071da177e4SLinus Torvalds goto done; 2081da177e4SLinus Torvalds } 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds static int __init root_dev_setup(char *line) 2111da177e4SLinus Torvalds { 2121da177e4SLinus Torvalds strlcpy(saved_root_name, line, sizeof(saved_root_name)); 2131da177e4SLinus Torvalds return 1; 2141da177e4SLinus Torvalds } 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds __setup("root=", root_dev_setup); 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds static char * __initdata root_mount_data; 2191da177e4SLinus Torvalds static int __init root_data_setup(char *str) 2201da177e4SLinus Torvalds { 2211da177e4SLinus Torvalds root_mount_data = str; 2221da177e4SLinus Torvalds return 1; 2231da177e4SLinus Torvalds } 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds static char * __initdata root_fs_names; 2261da177e4SLinus Torvalds static int __init fs_names_setup(char *str) 2271da177e4SLinus Torvalds { 2281da177e4SLinus Torvalds root_fs_names = str; 2291da177e4SLinus Torvalds return 1; 2301da177e4SLinus Torvalds } 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds static unsigned int __initdata root_delay; 2331da177e4SLinus Torvalds static int __init root_delay_setup(char *str) 2341da177e4SLinus Torvalds { 2351da177e4SLinus Torvalds root_delay = simple_strtoul(str, NULL, 0); 2361da177e4SLinus Torvalds return 1; 2371da177e4SLinus Torvalds } 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds __setup("rootflags=", root_data_setup); 2401da177e4SLinus Torvalds __setup("rootfstype=", fs_names_setup); 2411da177e4SLinus Torvalds __setup("rootdelay=", root_delay_setup); 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds static void __init get_fs_names(char *page) 2441da177e4SLinus Torvalds { 2451da177e4SLinus Torvalds char *s = page; 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds if (root_fs_names) { 2481da177e4SLinus Torvalds strcpy(page, root_fs_names); 2491da177e4SLinus Torvalds while (*s++) { 2501da177e4SLinus Torvalds if (s[-1] == ',') 2511da177e4SLinus Torvalds s[-1] = '\0'; 2521da177e4SLinus Torvalds } 2531da177e4SLinus Torvalds } else { 2541da177e4SLinus Torvalds int len = get_filesystem_list(page); 2551da177e4SLinus Torvalds char *p, *next; 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds page[len] = '\0'; 2581da177e4SLinus Torvalds for (p = page-1; p; p = next) { 2591da177e4SLinus Torvalds next = strchr(++p, '\n'); 2601da177e4SLinus Torvalds if (*p++ != '\t') 2611da177e4SLinus Torvalds continue; 2621da177e4SLinus Torvalds while ((*s++ = *p++) != '\n') 2631da177e4SLinus Torvalds ; 2641da177e4SLinus Torvalds s[-1] = '\0'; 2651da177e4SLinus Torvalds } 2661da177e4SLinus Torvalds } 2671da177e4SLinus Torvalds *s = '\0'; 2681da177e4SLinus Torvalds } 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds static int __init do_mount_root(char *name, char *fs, int flags, void *data) 2711da177e4SLinus Torvalds { 2721da177e4SLinus Torvalds int err = sys_mount(name, "/root", fs, flags, data); 2731da177e4SLinus Torvalds if (err) 2741da177e4SLinus Torvalds return err; 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds sys_chdir("/root"); 2771da177e4SLinus Torvalds ROOT_DEV = current->fs->pwdmnt->mnt_sb->s_dev; 2781da177e4SLinus Torvalds printk("VFS: Mounted root (%s filesystem)%s.\n", 2791da177e4SLinus Torvalds current->fs->pwdmnt->mnt_sb->s_type->name, 2801da177e4SLinus Torvalds current->fs->pwdmnt->mnt_sb->s_flags & MS_RDONLY ? 2811da177e4SLinus Torvalds " readonly" : ""); 2821da177e4SLinus Torvalds return 0; 2831da177e4SLinus Torvalds } 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds void __init mount_block_root(char *name, int flags) 2861da177e4SLinus Torvalds { 2871da177e4SLinus Torvalds char *fs_names = __getname(); 2881da177e4SLinus Torvalds char *p; 2899361401eSDavid Howells #ifdef CONFIG_BLOCK 2901da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 2919361401eSDavid Howells #else 2929361401eSDavid Howells const char *b = name; 2939361401eSDavid Howells #endif 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds get_fs_names(fs_names); 2961da177e4SLinus Torvalds retry: 2971da177e4SLinus Torvalds for (p = fs_names; *p; p += strlen(p)+1) { 2981da177e4SLinus Torvalds int err = do_mount_root(name, p, flags, root_mount_data); 2991da177e4SLinus Torvalds switch (err) { 3001da177e4SLinus Torvalds case 0: 3011da177e4SLinus Torvalds goto out; 3021da177e4SLinus Torvalds case -EACCES: 3031da177e4SLinus Torvalds flags |= MS_RDONLY; 3041da177e4SLinus Torvalds goto retry; 3051da177e4SLinus Torvalds case -EINVAL: 3061da177e4SLinus Torvalds continue; 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds /* 3091da177e4SLinus Torvalds * Allow the user to distinguish between failed sys_open 3101da177e4SLinus Torvalds * and bad superblock on root device. 3111da177e4SLinus Torvalds */ 3129361401eSDavid Howells #ifdef CONFIG_BLOCK 3131da177e4SLinus Torvalds __bdevname(ROOT_DEV, b); 3149361401eSDavid Howells #endif 3151da177e4SLinus Torvalds printk("VFS: Cannot open root device \"%s\" or %s\n", 3161da177e4SLinus Torvalds root_device_name, b); 3171da177e4SLinus Torvalds printk("Please append a correct \"root=\" boot option\n"); 3181da177e4SLinus Torvalds 3191da177e4SLinus Torvalds panic("VFS: Unable to mount root fs on %s", b); 3201da177e4SLinus Torvalds } 321be6e028bSAndy Whitcroft 322be6e028bSAndy Whitcroft printk("No filesystem could mount root, tried: "); 323be6e028bSAndy Whitcroft for (p = fs_names; *p; p += strlen(p)+1) 324be6e028bSAndy Whitcroft printk(" %s", p); 325be6e028bSAndy Whitcroft printk("\n"); 3269361401eSDavid Howells #ifdef CONFIG_BLOCK 3279361401eSDavid Howells __bdevname(ROOT_DEV, b); 3289361401eSDavid Howells #endif 3299361401eSDavid Howells panic("VFS: Unable to mount root fs on %s", b); 3301da177e4SLinus Torvalds out: 3311da177e4SLinus Torvalds putname(fs_names); 3321da177e4SLinus Torvalds } 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds #ifdef CONFIG_ROOT_NFS 3351da177e4SLinus Torvalds static int __init mount_nfs_root(void) 3361da177e4SLinus Torvalds { 3371da177e4SLinus Torvalds void *data = nfs_root_data(); 3381da177e4SLinus Torvalds 339bdaf8529SGreg Kroah-Hartman create_dev("/dev/root", ROOT_DEV); 3401da177e4SLinus Torvalds if (data && 3411da177e4SLinus Torvalds do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0) 3421da177e4SLinus Torvalds return 1; 3431da177e4SLinus Torvalds return 0; 3441da177e4SLinus Torvalds } 3451da177e4SLinus Torvalds #endif 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds #if defined(CONFIG_BLK_DEV_RAM) || defined(CONFIG_BLK_DEV_FD) 3481da177e4SLinus Torvalds void __init change_floppy(char *fmt, ...) 3491da177e4SLinus Torvalds { 3501da177e4SLinus Torvalds struct termios termios; 3511da177e4SLinus Torvalds char buf[80]; 3521da177e4SLinus Torvalds char c; 3531da177e4SLinus Torvalds int fd; 3541da177e4SLinus Torvalds va_list args; 3551da177e4SLinus Torvalds va_start(args, fmt); 3561da177e4SLinus Torvalds vsprintf(buf, fmt, args); 3571da177e4SLinus Torvalds va_end(args); 3581da177e4SLinus Torvalds fd = sys_open("/dev/root", O_RDWR | O_NDELAY, 0); 3591da177e4SLinus Torvalds if (fd >= 0) { 3601da177e4SLinus Torvalds sys_ioctl(fd, FDEJECT, 0); 3611da177e4SLinus Torvalds sys_close(fd); 3621da177e4SLinus Torvalds } 3631da177e4SLinus Torvalds printk(KERN_NOTICE "VFS: Insert %s and press ENTER\n", buf); 3641da177e4SLinus Torvalds fd = sys_open("/dev/console", O_RDWR, 0); 3651da177e4SLinus Torvalds if (fd >= 0) { 3661da177e4SLinus Torvalds sys_ioctl(fd, TCGETS, (long)&termios); 3671da177e4SLinus Torvalds termios.c_lflag &= ~ICANON; 3681da177e4SLinus Torvalds sys_ioctl(fd, TCSETSF, (long)&termios); 3691da177e4SLinus Torvalds sys_read(fd, &c, 1); 3701da177e4SLinus Torvalds termios.c_lflag |= ICANON; 3711da177e4SLinus Torvalds sys_ioctl(fd, TCSETSF, (long)&termios); 3721da177e4SLinus Torvalds sys_close(fd); 3731da177e4SLinus Torvalds } 3741da177e4SLinus Torvalds } 3751da177e4SLinus Torvalds #endif 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvalds void __init mount_root(void) 3781da177e4SLinus Torvalds { 3791da177e4SLinus Torvalds #ifdef CONFIG_ROOT_NFS 3801da177e4SLinus Torvalds if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) { 3811da177e4SLinus Torvalds if (mount_nfs_root()) 3821da177e4SLinus Torvalds return; 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n"); 3851da177e4SLinus Torvalds ROOT_DEV = Root_FD0; 3861da177e4SLinus Torvalds } 3871da177e4SLinus Torvalds #endif 3881da177e4SLinus Torvalds #ifdef CONFIG_BLK_DEV_FD 3891da177e4SLinus Torvalds if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) { 3901da177e4SLinus Torvalds /* rd_doload is 2 for a dual initrd/ramload setup */ 3911da177e4SLinus Torvalds if (rd_doload==2) { 3921da177e4SLinus Torvalds if (rd_load_disk(1)) { 3931da177e4SLinus Torvalds ROOT_DEV = Root_RAM1; 3941da177e4SLinus Torvalds root_device_name = NULL; 3951da177e4SLinus Torvalds } 3961da177e4SLinus Torvalds } else 3971da177e4SLinus Torvalds change_floppy("root floppy"); 3981da177e4SLinus Torvalds } 3991da177e4SLinus Torvalds #endif 4009361401eSDavid Howells #ifdef CONFIG_BLOCK 401bdaf8529SGreg Kroah-Hartman create_dev("/dev/root", ROOT_DEV); 4021da177e4SLinus Torvalds mount_block_root("/dev/root", root_mountflags); 4039361401eSDavid Howells #endif 4041da177e4SLinus Torvalds } 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds /* 4071da177e4SLinus Torvalds * Prepare the namespace - decide what/where to mount, load ramdisks, etc. 4081da177e4SLinus Torvalds */ 4091da177e4SLinus Torvalds void __init prepare_namespace(void) 4101da177e4SLinus Torvalds { 4111da177e4SLinus Torvalds int is_floppy; 4121da177e4SLinus Torvalds 4131da177e4SLinus Torvalds if (root_delay) { 4141da177e4SLinus Torvalds printk(KERN_INFO "Waiting %dsec before mounting root device...\n", 4151da177e4SLinus Torvalds root_delay); 4161da177e4SLinus Torvalds ssleep(root_delay); 4171da177e4SLinus Torvalds } 4181da177e4SLinus Torvalds 419d779249eSGreg Kroah-Hartman /* wait for the known devices to complete their probing */ 420d779249eSGreg Kroah-Hartman while (driver_probe_done() != 0) 421d779249eSGreg Kroah-Hartman msleep(100); 422d779249eSGreg Kroah-Hartman 4231da177e4SLinus Torvalds md_run_setup(); 4241da177e4SLinus Torvalds 4251da177e4SLinus Torvalds if (saved_root_name[0]) { 4261da177e4SLinus Torvalds root_device_name = saved_root_name; 427e9482b43SJoern Engel if (!strncmp(root_device_name, "mtd", 3)) { 428e9482b43SJoern Engel mount_block_root(root_device_name, root_mountflags); 429e9482b43SJoern Engel goto out; 430e9482b43SJoern Engel } 4311da177e4SLinus Torvalds ROOT_DEV = name_to_dev_t(root_device_name); 4321da177e4SLinus Torvalds if (strncmp(root_device_name, "/dev/", 5) == 0) 4331da177e4SLinus Torvalds root_device_name += 5; 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR; 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds if (initrd_load()) 4391da177e4SLinus Torvalds goto out; 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds if (is_floppy && rd_doload && rd_load_disk(0)) 4421da177e4SLinus Torvalds ROOT_DEV = Root_RAM0; 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds mount_root(); 4451da177e4SLinus Torvalds out: 4461da177e4SLinus Torvalds sys_mount(".", "/", NULL, MS_MOVE, NULL); 4471da177e4SLinus Torvalds sys_chroot("."); 4481da177e4SLinus Torvalds security_sb_post_mountroot(); 4491da177e4SLinus Torvalds } 4501da177e4SLinus Torvalds 451