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> 10dd2a345fSDave Gilbert #include <linux/genhd.h> 11d53d9f16SAndrew Morton #include <linux/mount.h> 12d779249eSGreg Kroah-Hartman #include <linux/device.h> 1346595390SAdrian Bunk #include <linux/init.h> 14011e3fcdSAdrian Bunk #include <linux/fs.h> 151da177e4SLinus Torvalds 161da177e4SLinus Torvalds #include <linux/nfs_fs.h> 171da177e4SLinus Torvalds #include <linux/nfs_fs_sb.h> 181da177e4SLinus Torvalds #include <linux/nfs_mount.h> 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds #include "do_mounts.h" 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]; 27cc1ed754SPierre Ossman static int __initdata root_wait; 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds dev_t ROOT_DEV; 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds static int __init load_ramdisk(char *str) 321da177e4SLinus Torvalds { 331da177e4SLinus Torvalds rd_doload = simple_strtol(str,NULL,0) & 3; 341da177e4SLinus Torvalds return 1; 351da177e4SLinus Torvalds } 361da177e4SLinus Torvalds __setup("load_ramdisk=", load_ramdisk); 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds static int __init readonly(char *str) 391da177e4SLinus Torvalds { 401da177e4SLinus Torvalds if (*str) 411da177e4SLinus Torvalds return 0; 421da177e4SLinus Torvalds root_mountflags |= MS_RDONLY; 431da177e4SLinus Torvalds return 1; 441da177e4SLinus Torvalds } 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds static int __init readwrite(char *str) 471da177e4SLinus Torvalds { 481da177e4SLinus Torvalds if (*str) 491da177e4SLinus Torvalds return 0; 501da177e4SLinus Torvalds root_mountflags &= ~MS_RDONLY; 511da177e4SLinus Torvalds return 1; 521da177e4SLinus Torvalds } 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds __setup("ro", readonly); 551da177e4SLinus Torvalds __setup("rw", readwrite); 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds /* 581da177e4SLinus Torvalds * Convert a name into device number. We accept the following variants: 591da177e4SLinus Torvalds * 601da177e4SLinus Torvalds * 1) device number in hexadecimal represents itself 611da177e4SLinus Torvalds * 2) /dev/nfs represents Root_NFS (0xff) 621da177e4SLinus Torvalds * 3) /dev/<disk_name> represents the device number of disk 631da177e4SLinus Torvalds * 4) /dev/<disk_name><decimal> represents the device number 641da177e4SLinus Torvalds * of partition - device number of disk plus the partition number 651da177e4SLinus Torvalds * 5) /dev/<disk_name>p<decimal> - same as the above, that form is 661da177e4SLinus Torvalds * used when disk name of partitioned disk ends on a digit. 671da177e4SLinus Torvalds * 68edfaa7c3SKay Sievers * If name doesn't have fall into the categories above, we return (0,0). 69edfaa7c3SKay Sievers * block_class is used to check if something is a disk name. If the disk 70edfaa7c3SKay Sievers * name contains slashes, the device name has them replaced with 71edfaa7c3SKay Sievers * bangs. 721da177e4SLinus Torvalds */ 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds dev_t name_to_dev_t(char *name) 751da177e4SLinus Torvalds { 761da177e4SLinus Torvalds char s[32]; 771da177e4SLinus Torvalds char *p; 781da177e4SLinus Torvalds dev_t res = 0; 7930f2f0ebSKay Sievers int part; 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds if (strncmp(name, "/dev/", 5) != 0) { 821da177e4SLinus Torvalds unsigned maj, min; 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds if (sscanf(name, "%u:%u", &maj, &min) == 2) { 851da177e4SLinus Torvalds res = MKDEV(maj, min); 861da177e4SLinus Torvalds if (maj != MAJOR(res) || min != MINOR(res)) 871da177e4SLinus Torvalds goto fail; 881da177e4SLinus Torvalds } else { 891da177e4SLinus Torvalds res = new_decode_dev(simple_strtoul(name, &p, 16)); 901da177e4SLinus Torvalds if (*p) 911da177e4SLinus Torvalds goto fail; 921da177e4SLinus Torvalds } 931da177e4SLinus Torvalds goto done; 941da177e4SLinus Torvalds } 95edfaa7c3SKay Sievers 961da177e4SLinus Torvalds name += 5; 971da177e4SLinus Torvalds res = Root_NFS; 981da177e4SLinus Torvalds if (strcmp(name, "nfs") == 0) 991da177e4SLinus Torvalds goto done; 1001da177e4SLinus Torvalds res = Root_RAM0; 1011da177e4SLinus Torvalds if (strcmp(name, "ram") == 0) 1021da177e4SLinus Torvalds goto done; 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds if (strlen(name) > 31) 1051da177e4SLinus Torvalds goto fail; 1061da177e4SLinus Torvalds strcpy(s, name); 1071da177e4SLinus Torvalds for (p = s; *p; p++) 1081da177e4SLinus Torvalds if (*p == '/') 1091da177e4SLinus Torvalds *p = '!'; 11030f2f0ebSKay Sievers res = blk_lookup_devt(s, 0); 11130f2f0ebSKay Sievers if (res) 11230f2f0ebSKay Sievers goto done; 11330f2f0ebSKay Sievers 11430f2f0ebSKay Sievers /* 11530f2f0ebSKay Sievers * try non-existant, but valid partition, which may only exist 11630f2f0ebSKay Sievers * after revalidating the disk, like partitioned md devices 11730f2f0ebSKay Sievers */ 11830f2f0ebSKay Sievers while (p > s && isdigit(p[-1])) 11930f2f0ebSKay Sievers p--; 12030f2f0ebSKay Sievers if (p == s || !*p || *p == '0') 12130f2f0ebSKay Sievers goto fail; 12230f2f0ebSKay Sievers 12330f2f0ebSKay Sievers /* try disk name without <part number> */ 12430f2f0ebSKay Sievers part = simple_strtoul(p, NULL, 10); 12530f2f0ebSKay Sievers *p = '\0'; 12630f2f0ebSKay Sievers res = blk_lookup_devt(s, part); 12730f2f0ebSKay Sievers if (res) 12830f2f0ebSKay Sievers goto done; 12930f2f0ebSKay Sievers 13030f2f0ebSKay Sievers /* try disk name without p<part number> */ 13130f2f0ebSKay Sievers if (p < s + 2 || !isdigit(p[-2]) || p[-1] != 'p') 13230f2f0ebSKay Sievers goto fail; 13330f2f0ebSKay Sievers p[-1] = '\0'; 13430f2f0ebSKay Sievers res = blk_lookup_devt(s, part); 1351da177e4SLinus Torvalds if (res) 1361da177e4SLinus Torvalds goto done; 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds fail: 139edfaa7c3SKay Sievers return 0; 140edfaa7c3SKay Sievers done: 141edfaa7c3SKay Sievers return res; 1421da177e4SLinus Torvalds } 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds static int __init root_dev_setup(char *line) 1451da177e4SLinus Torvalds { 1461da177e4SLinus Torvalds strlcpy(saved_root_name, line, sizeof(saved_root_name)); 1471da177e4SLinus Torvalds return 1; 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds __setup("root=", root_dev_setup); 1511da177e4SLinus Torvalds 152cc1ed754SPierre Ossman static int __init rootwait_setup(char *str) 153cc1ed754SPierre Ossman { 154cc1ed754SPierre Ossman if (*str) 155cc1ed754SPierre Ossman return 0; 156cc1ed754SPierre Ossman root_wait = 1; 157cc1ed754SPierre Ossman return 1; 158cc1ed754SPierre Ossman } 159cc1ed754SPierre Ossman 160cc1ed754SPierre Ossman __setup("rootwait", rootwait_setup); 161cc1ed754SPierre Ossman 1621da177e4SLinus Torvalds static char * __initdata root_mount_data; 1631da177e4SLinus Torvalds static int __init root_data_setup(char *str) 1641da177e4SLinus Torvalds { 1651da177e4SLinus Torvalds root_mount_data = str; 1661da177e4SLinus Torvalds return 1; 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds static char * __initdata root_fs_names; 1701da177e4SLinus Torvalds static int __init fs_names_setup(char *str) 1711da177e4SLinus Torvalds { 1721da177e4SLinus Torvalds root_fs_names = str; 1731da177e4SLinus Torvalds return 1; 1741da177e4SLinus Torvalds } 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds static unsigned int __initdata root_delay; 1771da177e4SLinus Torvalds static int __init root_delay_setup(char *str) 1781da177e4SLinus Torvalds { 1791da177e4SLinus Torvalds root_delay = simple_strtoul(str, NULL, 0); 1801da177e4SLinus Torvalds return 1; 1811da177e4SLinus Torvalds } 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds __setup("rootflags=", root_data_setup); 1841da177e4SLinus Torvalds __setup("rootfstype=", fs_names_setup); 1851da177e4SLinus Torvalds __setup("rootdelay=", root_delay_setup); 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds static void __init get_fs_names(char *page) 1881da177e4SLinus Torvalds { 1891da177e4SLinus Torvalds char *s = page; 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds if (root_fs_names) { 1921da177e4SLinus Torvalds strcpy(page, root_fs_names); 1931da177e4SLinus Torvalds while (*s++) { 1941da177e4SLinus Torvalds if (s[-1] == ',') 1951da177e4SLinus Torvalds s[-1] = '\0'; 1961da177e4SLinus Torvalds } 1971da177e4SLinus Torvalds } else { 1981da177e4SLinus Torvalds int len = get_filesystem_list(page); 1991da177e4SLinus Torvalds char *p, *next; 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds page[len] = '\0'; 2021da177e4SLinus Torvalds for (p = page-1; p; p = next) { 2031da177e4SLinus Torvalds next = strchr(++p, '\n'); 2041da177e4SLinus Torvalds if (*p++ != '\t') 2051da177e4SLinus Torvalds continue; 2061da177e4SLinus Torvalds while ((*s++ = *p++) != '\n') 2071da177e4SLinus Torvalds ; 2081da177e4SLinus Torvalds s[-1] = '\0'; 2091da177e4SLinus Torvalds } 2101da177e4SLinus Torvalds } 2111da177e4SLinus Torvalds *s = '\0'; 2121da177e4SLinus Torvalds } 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds static int __init do_mount_root(char *name, char *fs, int flags, void *data) 2151da177e4SLinus Torvalds { 2161da177e4SLinus Torvalds int err = sys_mount(name, "/root", fs, flags, data); 2171da177e4SLinus Torvalds if (err) 2181da177e4SLinus Torvalds return err; 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds sys_chdir("/root"); 2216ac08c39SJan Blunck ROOT_DEV = current->fs->pwd.mnt->mnt_sb->s_dev; 2221da177e4SLinus Torvalds printk("VFS: Mounted root (%s filesystem)%s.\n", 2236ac08c39SJan Blunck current->fs->pwd.mnt->mnt_sb->s_type->name, 2246ac08c39SJan Blunck current->fs->pwd.mnt->mnt_sb->s_flags & MS_RDONLY ? 2251da177e4SLinus Torvalds " readonly" : ""); 2261da177e4SLinus Torvalds return 0; 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds 2291da177e4SLinus Torvalds void __init mount_block_root(char *name, int flags) 2301da177e4SLinus Torvalds { 2311da177e4SLinus Torvalds char *fs_names = __getname(); 2321da177e4SLinus Torvalds char *p; 2339361401eSDavid Howells #ifdef CONFIG_BLOCK 2341da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 2359361401eSDavid Howells #else 2369361401eSDavid Howells const char *b = name; 2379361401eSDavid Howells #endif 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds get_fs_names(fs_names); 2401da177e4SLinus Torvalds retry: 2411da177e4SLinus Torvalds for (p = fs_names; *p; p += strlen(p)+1) { 2421da177e4SLinus Torvalds int err = do_mount_root(name, p, flags, root_mount_data); 2431da177e4SLinus Torvalds switch (err) { 2441da177e4SLinus Torvalds case 0: 2451da177e4SLinus Torvalds goto out; 2461da177e4SLinus Torvalds case -EACCES: 2471da177e4SLinus Torvalds flags |= MS_RDONLY; 2481da177e4SLinus Torvalds goto retry; 2491da177e4SLinus Torvalds case -EINVAL: 2501da177e4SLinus Torvalds continue; 2511da177e4SLinus Torvalds } 2521da177e4SLinus Torvalds /* 2531da177e4SLinus Torvalds * Allow the user to distinguish between failed sys_open 2541da177e4SLinus Torvalds * and bad superblock on root device. 255dd2a345fSDave Gilbert * and give them a list of the available devices 2561da177e4SLinus Torvalds */ 2579361401eSDavid Howells #ifdef CONFIG_BLOCK 2581da177e4SLinus Torvalds __bdevname(ROOT_DEV, b); 2599361401eSDavid Howells #endif 2601da177e4SLinus Torvalds printk("VFS: Cannot open root device \"%s\" or %s\n", 2611da177e4SLinus Torvalds root_device_name, b); 262dd2a345fSDave Gilbert printk("Please append a correct \"root=\" boot option; here are the available partitions:\n"); 2631da177e4SLinus Torvalds 264dd2a345fSDave Gilbert printk_all_partitions(); 2651da177e4SLinus Torvalds panic("VFS: Unable to mount root fs on %s", b); 2661da177e4SLinus Torvalds } 267be6e028bSAndy Whitcroft 268dd2a345fSDave Gilbert printk("List of all partitions:\n"); 269dd2a345fSDave Gilbert printk_all_partitions(); 270be6e028bSAndy Whitcroft printk("No filesystem could mount root, tried: "); 271be6e028bSAndy Whitcroft for (p = fs_names; *p; p += strlen(p)+1) 272be6e028bSAndy Whitcroft printk(" %s", p); 273be6e028bSAndy Whitcroft printk("\n"); 2749361401eSDavid Howells #ifdef CONFIG_BLOCK 2759361401eSDavid Howells __bdevname(ROOT_DEV, b); 2769361401eSDavid Howells #endif 2779361401eSDavid Howells panic("VFS: Unable to mount root fs on %s", b); 2781da177e4SLinus Torvalds out: 2791da177e4SLinus Torvalds putname(fs_names); 2801da177e4SLinus Torvalds } 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds #ifdef CONFIG_ROOT_NFS 2831da177e4SLinus Torvalds static int __init mount_nfs_root(void) 2841da177e4SLinus Torvalds { 2851da177e4SLinus Torvalds void *data = nfs_root_data(); 2861da177e4SLinus Torvalds 287bdaf8529SGreg Kroah-Hartman create_dev("/dev/root", ROOT_DEV); 2881da177e4SLinus Torvalds if (data && 2891da177e4SLinus Torvalds do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0) 2901da177e4SLinus Torvalds return 1; 2911da177e4SLinus Torvalds return 0; 2921da177e4SLinus Torvalds } 2931da177e4SLinus Torvalds #endif 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds #if defined(CONFIG_BLK_DEV_RAM) || defined(CONFIG_BLK_DEV_FD) 2961da177e4SLinus Torvalds void __init change_floppy(char *fmt, ...) 2971da177e4SLinus Torvalds { 2981da177e4SLinus Torvalds struct termios termios; 2991da177e4SLinus Torvalds char buf[80]; 3001da177e4SLinus Torvalds char c; 3011da177e4SLinus Torvalds int fd; 3021da177e4SLinus Torvalds va_list args; 3031da177e4SLinus Torvalds va_start(args, fmt); 3041da177e4SLinus Torvalds vsprintf(buf, fmt, args); 3051da177e4SLinus Torvalds va_end(args); 3061da177e4SLinus Torvalds fd = sys_open("/dev/root", O_RDWR | O_NDELAY, 0); 3071da177e4SLinus Torvalds if (fd >= 0) { 3081da177e4SLinus Torvalds sys_ioctl(fd, FDEJECT, 0); 3091da177e4SLinus Torvalds sys_close(fd); 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds printk(KERN_NOTICE "VFS: Insert %s and press ENTER\n", buf); 3121da177e4SLinus Torvalds fd = sys_open("/dev/console", O_RDWR, 0); 3131da177e4SLinus Torvalds if (fd >= 0) { 3141da177e4SLinus Torvalds sys_ioctl(fd, TCGETS, (long)&termios); 3151da177e4SLinus Torvalds termios.c_lflag &= ~ICANON; 3161da177e4SLinus Torvalds sys_ioctl(fd, TCSETSF, (long)&termios); 3171da177e4SLinus Torvalds sys_read(fd, &c, 1); 3181da177e4SLinus Torvalds termios.c_lflag |= ICANON; 3191da177e4SLinus Torvalds sys_ioctl(fd, TCSETSF, (long)&termios); 3201da177e4SLinus Torvalds sys_close(fd); 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds } 3231da177e4SLinus Torvalds #endif 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds void __init mount_root(void) 3261da177e4SLinus Torvalds { 3271da177e4SLinus Torvalds #ifdef CONFIG_ROOT_NFS 3281da177e4SLinus Torvalds if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) { 3291da177e4SLinus Torvalds if (mount_nfs_root()) 3301da177e4SLinus Torvalds return; 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n"); 3331da177e4SLinus Torvalds ROOT_DEV = Root_FD0; 3341da177e4SLinus Torvalds } 3351da177e4SLinus Torvalds #endif 3361da177e4SLinus Torvalds #ifdef CONFIG_BLK_DEV_FD 3371da177e4SLinus Torvalds if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) { 3381da177e4SLinus Torvalds /* rd_doload is 2 for a dual initrd/ramload setup */ 3391da177e4SLinus Torvalds if (rd_doload==2) { 3401da177e4SLinus Torvalds if (rd_load_disk(1)) { 3411da177e4SLinus Torvalds ROOT_DEV = Root_RAM1; 3421da177e4SLinus Torvalds root_device_name = NULL; 3431da177e4SLinus Torvalds } 3441da177e4SLinus Torvalds } else 3451da177e4SLinus Torvalds change_floppy("root floppy"); 3461da177e4SLinus Torvalds } 3471da177e4SLinus Torvalds #endif 3489361401eSDavid Howells #ifdef CONFIG_BLOCK 349bdaf8529SGreg Kroah-Hartman create_dev("/dev/root", ROOT_DEV); 3501da177e4SLinus Torvalds mount_block_root("/dev/root", root_mountflags); 3519361401eSDavid Howells #endif 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvalds /* 3551da177e4SLinus Torvalds * Prepare the namespace - decide what/where to mount, load ramdisks, etc. 3561da177e4SLinus Torvalds */ 3571da177e4SLinus Torvalds void __init prepare_namespace(void) 3581da177e4SLinus Torvalds { 3591da177e4SLinus Torvalds int is_floppy; 3601da177e4SLinus Torvalds 3611da177e4SLinus Torvalds if (root_delay) { 3621da177e4SLinus Torvalds printk(KERN_INFO "Waiting %dsec before mounting root device...\n", 3631da177e4SLinus Torvalds root_delay); 3641da177e4SLinus Torvalds ssleep(root_delay); 3651da177e4SLinus Torvalds } 3661da177e4SLinus Torvalds 367d779249eSGreg Kroah-Hartman /* wait for the known devices to complete their probing */ 368d779249eSGreg Kroah-Hartman while (driver_probe_done() != 0) 369d779249eSGreg Kroah-Hartman msleep(100); 370d779249eSGreg Kroah-Hartman 3711da177e4SLinus Torvalds md_run_setup(); 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds if (saved_root_name[0]) { 3741da177e4SLinus Torvalds root_device_name = saved_root_name; 3752d62f488SAdrian Hunter if (!strncmp(root_device_name, "mtd", 3) || 3762d62f488SAdrian Hunter !strncmp(root_device_name, "ubi", 3)) { 377e9482b43SJoern Engel mount_block_root(root_device_name, root_mountflags); 378e9482b43SJoern Engel goto out; 379e9482b43SJoern Engel } 3801da177e4SLinus Torvalds ROOT_DEV = name_to_dev_t(root_device_name); 3811da177e4SLinus Torvalds if (strncmp(root_device_name, "/dev/", 5) == 0) 3821da177e4SLinus Torvalds root_device_name += 5; 3831da177e4SLinus Torvalds } 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds if (initrd_load()) 3861da177e4SLinus Torvalds goto out; 3871da177e4SLinus Torvalds 388cc1ed754SPierre Ossman /* wait for any asynchronous scanning to complete */ 389cc1ed754SPierre Ossman if ((ROOT_DEV == 0) && root_wait) { 390cc1ed754SPierre Ossman printk(KERN_INFO "Waiting for root device %s...\n", 391cc1ed754SPierre Ossman saved_root_name); 392cc1ed754SPierre Ossman while (driver_probe_done() != 0 || 393cc1ed754SPierre Ossman (ROOT_DEV = name_to_dev_t(saved_root_name)) == 0) 394cc1ed754SPierre Ossman msleep(100); 395cc1ed754SPierre Ossman } 396cc1ed754SPierre Ossman 397cc1ed754SPierre Ossman is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR; 398cc1ed754SPierre Ossman 3991da177e4SLinus Torvalds if (is_floppy && rd_doload && rd_load_disk(0)) 4001da177e4SLinus Torvalds ROOT_DEV = Root_RAM0; 4011da177e4SLinus Torvalds 4021da177e4SLinus Torvalds mount_root(); 4031da177e4SLinus Torvalds out: 4041da177e4SLinus Torvalds sys_mount(".", "/", NULL, MS_MOVE, NULL); 4051da177e4SLinus Torvalds sys_chroot("."); 4061da177e4SLinus Torvalds } 4071da177e4SLinus Torvalds 408