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> 1582c8253aSAdrian Bunk #include <linux/initrd.h> 1622a9d645SArjan van de Ven #include <linux/async.h> 175ad4e53bSAl Viro #include <linux/fs_struct.h> 181da177e4SLinus Torvalds 191da177e4SLinus Torvalds #include <linux/nfs_fs.h> 201da177e4SLinus Torvalds #include <linux/nfs_fs_sb.h> 211da177e4SLinus Torvalds #include <linux/nfs_mount.h> 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds #include "do_mounts.h" 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */ 261da177e4SLinus Torvalds 279b04c997STheodore Ts'o int root_mountflags = MS_RDONLY | MS_SILENT; 28f56f6d30SAdrian Bunk static char * __initdata root_device_name; 291da177e4SLinus Torvalds static char __initdata saved_root_name[64]; 30cc1ed754SPierre Ossman static int __initdata root_wait; 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds dev_t ROOT_DEV; 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds static int __init load_ramdisk(char *str) 351da177e4SLinus Torvalds { 361da177e4SLinus Torvalds rd_doload = simple_strtol(str,NULL,0) & 3; 371da177e4SLinus Torvalds return 1; 381da177e4SLinus Torvalds } 391da177e4SLinus Torvalds __setup("load_ramdisk=", load_ramdisk); 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds static int __init readonly(char *str) 421da177e4SLinus Torvalds { 431da177e4SLinus Torvalds if (*str) 441da177e4SLinus Torvalds return 0; 451da177e4SLinus Torvalds root_mountflags |= MS_RDONLY; 461da177e4SLinus Torvalds return 1; 471da177e4SLinus Torvalds } 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds static int __init readwrite(char *str) 501da177e4SLinus Torvalds { 511da177e4SLinus Torvalds if (*str) 521da177e4SLinus Torvalds return 0; 531da177e4SLinus Torvalds root_mountflags &= ~MS_RDONLY; 541da177e4SLinus Torvalds return 1; 551da177e4SLinus Torvalds } 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds __setup("ro", readonly); 581da177e4SLinus Torvalds __setup("rw", readwrite); 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds /* 611da177e4SLinus Torvalds * Convert a name into device number. We accept the following variants: 621da177e4SLinus Torvalds * 631da177e4SLinus Torvalds * 1) device number in hexadecimal represents itself 641da177e4SLinus Torvalds * 2) /dev/nfs represents Root_NFS (0xff) 651da177e4SLinus Torvalds * 3) /dev/<disk_name> represents the device number of disk 661da177e4SLinus Torvalds * 4) /dev/<disk_name><decimal> represents the device number 671da177e4SLinus Torvalds * of partition - device number of disk plus the partition number 681da177e4SLinus Torvalds * 5) /dev/<disk_name>p<decimal> - same as the above, that form is 691da177e4SLinus Torvalds * used when disk name of partitioned disk ends on a digit. 701da177e4SLinus Torvalds * 71edfaa7c3SKay Sievers * If name doesn't have fall into the categories above, we return (0,0). 72edfaa7c3SKay Sievers * block_class is used to check if something is a disk name. If the disk 73edfaa7c3SKay Sievers * name contains slashes, the device name has them replaced with 74edfaa7c3SKay Sievers * bangs. 751da177e4SLinus Torvalds */ 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds dev_t name_to_dev_t(char *name) 781da177e4SLinus Torvalds { 791da177e4SLinus Torvalds char s[32]; 801da177e4SLinus Torvalds char *p; 811da177e4SLinus Torvalds dev_t res = 0; 8230f2f0ebSKay Sievers int part; 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds if (strncmp(name, "/dev/", 5) != 0) { 851da177e4SLinus Torvalds unsigned maj, min; 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds if (sscanf(name, "%u:%u", &maj, &min) == 2) { 881da177e4SLinus Torvalds res = MKDEV(maj, min); 891da177e4SLinus Torvalds if (maj != MAJOR(res) || min != MINOR(res)) 901da177e4SLinus Torvalds goto fail; 911da177e4SLinus Torvalds } else { 921da177e4SLinus Torvalds res = new_decode_dev(simple_strtoul(name, &p, 16)); 931da177e4SLinus Torvalds if (*p) 941da177e4SLinus Torvalds goto fail; 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds goto done; 971da177e4SLinus Torvalds } 98edfaa7c3SKay Sievers 991da177e4SLinus Torvalds name += 5; 1001da177e4SLinus Torvalds res = Root_NFS; 1011da177e4SLinus Torvalds if (strcmp(name, "nfs") == 0) 1021da177e4SLinus Torvalds goto done; 1031da177e4SLinus Torvalds res = Root_RAM0; 1041da177e4SLinus Torvalds if (strcmp(name, "ram") == 0) 1051da177e4SLinus Torvalds goto done; 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds if (strlen(name) > 31) 1081da177e4SLinus Torvalds goto fail; 1091da177e4SLinus Torvalds strcpy(s, name); 1101da177e4SLinus Torvalds for (p = s; *p; p++) 1111da177e4SLinus Torvalds if (*p == '/') 1121da177e4SLinus Torvalds *p = '!'; 11330f2f0ebSKay Sievers res = blk_lookup_devt(s, 0); 11430f2f0ebSKay Sievers if (res) 11530f2f0ebSKay Sievers goto done; 11630f2f0ebSKay Sievers 11730f2f0ebSKay Sievers /* 11830f2f0ebSKay Sievers * try non-existant, but valid partition, which may only exist 11930f2f0ebSKay Sievers * after revalidating the disk, like partitioned md devices 12030f2f0ebSKay Sievers */ 12130f2f0ebSKay Sievers while (p > s && isdigit(p[-1])) 12230f2f0ebSKay Sievers p--; 12330f2f0ebSKay Sievers if (p == s || !*p || *p == '0') 12430f2f0ebSKay Sievers goto fail; 12530f2f0ebSKay Sievers 12630f2f0ebSKay Sievers /* try disk name without <part number> */ 12730f2f0ebSKay Sievers part = simple_strtoul(p, NULL, 10); 12830f2f0ebSKay Sievers *p = '\0'; 12930f2f0ebSKay Sievers res = blk_lookup_devt(s, part); 13030f2f0ebSKay Sievers if (res) 13130f2f0ebSKay Sievers goto done; 13230f2f0ebSKay Sievers 13330f2f0ebSKay Sievers /* try disk name without p<part number> */ 13430f2f0ebSKay Sievers if (p < s + 2 || !isdigit(p[-2]) || p[-1] != 'p') 13530f2f0ebSKay Sievers goto fail; 13630f2f0ebSKay Sievers p[-1] = '\0'; 13730f2f0ebSKay Sievers res = blk_lookup_devt(s, part); 1381da177e4SLinus Torvalds if (res) 1391da177e4SLinus Torvalds goto done; 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds fail: 142edfaa7c3SKay Sievers return 0; 143edfaa7c3SKay Sievers done: 144edfaa7c3SKay Sievers return res; 1451da177e4SLinus Torvalds } 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvalds static int __init root_dev_setup(char *line) 1481da177e4SLinus Torvalds { 1491da177e4SLinus Torvalds strlcpy(saved_root_name, line, sizeof(saved_root_name)); 1501da177e4SLinus Torvalds return 1; 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds __setup("root=", root_dev_setup); 1541da177e4SLinus Torvalds 155cc1ed754SPierre Ossman static int __init rootwait_setup(char *str) 156cc1ed754SPierre Ossman { 157cc1ed754SPierre Ossman if (*str) 158cc1ed754SPierre Ossman return 0; 159cc1ed754SPierre Ossman root_wait = 1; 160cc1ed754SPierre Ossman return 1; 161cc1ed754SPierre Ossman } 162cc1ed754SPierre Ossman 163cc1ed754SPierre Ossman __setup("rootwait", rootwait_setup); 164cc1ed754SPierre Ossman 1651da177e4SLinus Torvalds static char * __initdata root_mount_data; 1661da177e4SLinus Torvalds static int __init root_data_setup(char *str) 1671da177e4SLinus Torvalds { 1681da177e4SLinus Torvalds root_mount_data = str; 1691da177e4SLinus Torvalds return 1; 1701da177e4SLinus Torvalds } 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds static char * __initdata root_fs_names; 1731da177e4SLinus Torvalds static int __init fs_names_setup(char *str) 1741da177e4SLinus Torvalds { 1751da177e4SLinus Torvalds root_fs_names = str; 1761da177e4SLinus Torvalds return 1; 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds static unsigned int __initdata root_delay; 1801da177e4SLinus Torvalds static int __init root_delay_setup(char *str) 1811da177e4SLinus Torvalds { 1821da177e4SLinus Torvalds root_delay = simple_strtoul(str, NULL, 0); 1831da177e4SLinus Torvalds return 1; 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds __setup("rootflags=", root_data_setup); 1871da177e4SLinus Torvalds __setup("rootfstype=", fs_names_setup); 1881da177e4SLinus Torvalds __setup("rootdelay=", root_delay_setup); 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds static void __init get_fs_names(char *page) 1911da177e4SLinus Torvalds { 1921da177e4SLinus Torvalds char *s = page; 1931da177e4SLinus Torvalds 1941da177e4SLinus Torvalds if (root_fs_names) { 1951da177e4SLinus Torvalds strcpy(page, root_fs_names); 1961da177e4SLinus Torvalds while (*s++) { 1971da177e4SLinus Torvalds if (s[-1] == ',') 1981da177e4SLinus Torvalds s[-1] = '\0'; 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds } else { 2011da177e4SLinus Torvalds int len = get_filesystem_list(page); 2021da177e4SLinus Torvalds char *p, *next; 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds page[len] = '\0'; 2051da177e4SLinus Torvalds for (p = page-1; p; p = next) { 2061da177e4SLinus Torvalds next = strchr(++p, '\n'); 2071da177e4SLinus Torvalds if (*p++ != '\t') 2081da177e4SLinus Torvalds continue; 2091da177e4SLinus Torvalds while ((*s++ = *p++) != '\n') 2101da177e4SLinus Torvalds ; 2111da177e4SLinus Torvalds s[-1] = '\0'; 2121da177e4SLinus Torvalds } 2131da177e4SLinus Torvalds } 2141da177e4SLinus Torvalds *s = '\0'; 2151da177e4SLinus Torvalds } 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds static int __init do_mount_root(char *name, char *fs, int flags, void *data) 2181da177e4SLinus Torvalds { 2191da177e4SLinus Torvalds int err = sys_mount(name, "/root", fs, flags, data); 2201da177e4SLinus Torvalds if (err) 2211da177e4SLinus Torvalds return err; 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds sys_chdir("/root"); 2246ac08c39SJan Blunck ROOT_DEV = current->fs->pwd.mnt->mnt_sb->s_dev; 225bca1033bSMarton Balint printk("VFS: Mounted root (%s filesystem)%s on device %u:%u.\n", 2266ac08c39SJan Blunck current->fs->pwd.mnt->mnt_sb->s_type->name, 2276ac08c39SJan Blunck current->fs->pwd.mnt->mnt_sb->s_flags & MS_RDONLY ? 228bca1033bSMarton Balint " readonly" : "", MAJOR(ROOT_DEV), MINOR(ROOT_DEV)); 2291da177e4SLinus Torvalds return 0; 2301da177e4SLinus Torvalds } 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds void __init mount_block_root(char *name, int flags) 2331da177e4SLinus Torvalds { 2343b5c760eSVegard Nossum char *fs_names = __getname_gfp(GFP_KERNEL 2353b5c760eSVegard Nossum | __GFP_NOTRACK_FALSE_POSITIVE); 2361da177e4SLinus Torvalds char *p; 2379361401eSDavid Howells #ifdef CONFIG_BLOCK 2381da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 2399361401eSDavid Howells #else 2409361401eSDavid Howells const char *b = name; 2419361401eSDavid Howells #endif 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds get_fs_names(fs_names); 2441da177e4SLinus Torvalds retry: 2451da177e4SLinus Torvalds for (p = fs_names; *p; p += strlen(p)+1) { 2461da177e4SLinus Torvalds int err = do_mount_root(name, p, flags, root_mount_data); 2471da177e4SLinus Torvalds switch (err) { 2481da177e4SLinus Torvalds case 0: 2491da177e4SLinus Torvalds goto out; 2501da177e4SLinus Torvalds case -EACCES: 2511da177e4SLinus Torvalds flags |= MS_RDONLY; 2521da177e4SLinus Torvalds goto retry; 2531da177e4SLinus Torvalds case -EINVAL: 2541da177e4SLinus Torvalds continue; 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds /* 2571da177e4SLinus Torvalds * Allow the user to distinguish between failed sys_open 2581da177e4SLinus Torvalds * and bad superblock on root device. 259dd2a345fSDave Gilbert * and give them a list of the available devices 2601da177e4SLinus Torvalds */ 2619361401eSDavid Howells #ifdef CONFIG_BLOCK 2621da177e4SLinus Torvalds __bdevname(ROOT_DEV, b); 2639361401eSDavid Howells #endif 2641da177e4SLinus Torvalds printk("VFS: Cannot open root device \"%s\" or %s\n", 2651da177e4SLinus Torvalds root_device_name, b); 266dd2a345fSDave Gilbert printk("Please append a correct \"root=\" boot option; here are the available partitions:\n"); 2671da177e4SLinus Torvalds 268dd2a345fSDave Gilbert printk_all_partitions(); 26955dc7db7STejun Heo #ifdef CONFIG_DEBUG_BLOCK_EXT_DEVT 27055dc7db7STejun Heo printk("DEBUG_BLOCK_EXT_DEVT is enabled, you need to specify " 27155dc7db7STejun Heo "explicit textual name for \"root=\" boot option.\n"); 27255dc7db7STejun Heo #endif 2731da177e4SLinus Torvalds panic("VFS: Unable to mount root fs on %s", b); 2741da177e4SLinus Torvalds } 275be6e028bSAndy Whitcroft 276dd2a345fSDave Gilbert printk("List of all partitions:\n"); 277dd2a345fSDave Gilbert printk_all_partitions(); 278be6e028bSAndy Whitcroft printk("No filesystem could mount root, tried: "); 279be6e028bSAndy Whitcroft for (p = fs_names; *p; p += strlen(p)+1) 280be6e028bSAndy Whitcroft printk(" %s", p); 281be6e028bSAndy Whitcroft printk("\n"); 2829361401eSDavid Howells #ifdef CONFIG_BLOCK 2839361401eSDavid Howells __bdevname(ROOT_DEV, b); 2849361401eSDavid Howells #endif 2859361401eSDavid Howells panic("VFS: Unable to mount root fs on %s", b); 2861da177e4SLinus Torvalds out: 2871da177e4SLinus Torvalds putname(fs_names); 2881da177e4SLinus Torvalds } 2891da177e4SLinus Torvalds 2901da177e4SLinus Torvalds #ifdef CONFIG_ROOT_NFS 2911da177e4SLinus Torvalds static int __init mount_nfs_root(void) 2921da177e4SLinus Torvalds { 2931da177e4SLinus Torvalds void *data = nfs_root_data(); 2941da177e4SLinus Torvalds 295bdaf8529SGreg Kroah-Hartman create_dev("/dev/root", ROOT_DEV); 2961da177e4SLinus Torvalds if (data && 2971da177e4SLinus Torvalds do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0) 2981da177e4SLinus Torvalds return 1; 2991da177e4SLinus Torvalds return 0; 3001da177e4SLinus Torvalds } 3011da177e4SLinus Torvalds #endif 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds #if defined(CONFIG_BLK_DEV_RAM) || defined(CONFIG_BLK_DEV_FD) 3041da177e4SLinus Torvalds void __init change_floppy(char *fmt, ...) 3051da177e4SLinus Torvalds { 3061da177e4SLinus Torvalds struct termios termios; 3071da177e4SLinus Torvalds char buf[80]; 3081da177e4SLinus Torvalds char c; 3091da177e4SLinus Torvalds int fd; 3101da177e4SLinus Torvalds va_list args; 3111da177e4SLinus Torvalds va_start(args, fmt); 3121da177e4SLinus Torvalds vsprintf(buf, fmt, args); 3131da177e4SLinus Torvalds va_end(args); 3141da177e4SLinus Torvalds fd = sys_open("/dev/root", O_RDWR | O_NDELAY, 0); 3151da177e4SLinus Torvalds if (fd >= 0) { 3161da177e4SLinus Torvalds sys_ioctl(fd, FDEJECT, 0); 3171da177e4SLinus Torvalds sys_close(fd); 3181da177e4SLinus Torvalds } 3191da177e4SLinus Torvalds printk(KERN_NOTICE "VFS: Insert %s and press ENTER\n", buf); 3201da177e4SLinus Torvalds fd = sys_open("/dev/console", O_RDWR, 0); 3211da177e4SLinus Torvalds if (fd >= 0) { 3221da177e4SLinus Torvalds sys_ioctl(fd, TCGETS, (long)&termios); 3231da177e4SLinus Torvalds termios.c_lflag &= ~ICANON; 3241da177e4SLinus Torvalds sys_ioctl(fd, TCSETSF, (long)&termios); 3251da177e4SLinus Torvalds sys_read(fd, &c, 1); 3261da177e4SLinus Torvalds termios.c_lflag |= ICANON; 3271da177e4SLinus Torvalds sys_ioctl(fd, TCSETSF, (long)&termios); 3281da177e4SLinus Torvalds sys_close(fd); 3291da177e4SLinus Torvalds } 3301da177e4SLinus Torvalds } 3311da177e4SLinus Torvalds #endif 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds void __init mount_root(void) 3341da177e4SLinus Torvalds { 3351da177e4SLinus Torvalds #ifdef CONFIG_ROOT_NFS 3361da177e4SLinus Torvalds if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) { 3371da177e4SLinus Torvalds if (mount_nfs_root()) 3381da177e4SLinus Torvalds return; 3391da177e4SLinus Torvalds 3401da177e4SLinus Torvalds printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n"); 3411da177e4SLinus Torvalds ROOT_DEV = Root_FD0; 3421da177e4SLinus Torvalds } 3431da177e4SLinus Torvalds #endif 3441da177e4SLinus Torvalds #ifdef CONFIG_BLK_DEV_FD 3451da177e4SLinus Torvalds if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) { 3461da177e4SLinus Torvalds /* rd_doload is 2 for a dual initrd/ramload setup */ 3471da177e4SLinus Torvalds if (rd_doload==2) { 3481da177e4SLinus Torvalds if (rd_load_disk(1)) { 3491da177e4SLinus Torvalds ROOT_DEV = Root_RAM1; 3501da177e4SLinus Torvalds root_device_name = NULL; 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds } else 3531da177e4SLinus Torvalds change_floppy("root floppy"); 3541da177e4SLinus Torvalds } 3551da177e4SLinus Torvalds #endif 3569361401eSDavid Howells #ifdef CONFIG_BLOCK 357bdaf8529SGreg Kroah-Hartman create_dev("/dev/root", ROOT_DEV); 3581da177e4SLinus Torvalds mount_block_root("/dev/root", root_mountflags); 3599361401eSDavid Howells #endif 3601da177e4SLinus Torvalds } 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds /* 3631da177e4SLinus Torvalds * Prepare the namespace - decide what/where to mount, load ramdisks, etc. 3641da177e4SLinus Torvalds */ 3651da177e4SLinus Torvalds void __init prepare_namespace(void) 3661da177e4SLinus Torvalds { 3671da177e4SLinus Torvalds int is_floppy; 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds if (root_delay) { 3701da177e4SLinus Torvalds printk(KERN_INFO "Waiting %dsec before mounting root device...\n", 3711da177e4SLinus Torvalds root_delay); 3721da177e4SLinus Torvalds ssleep(root_delay); 3731da177e4SLinus Torvalds } 3741da177e4SLinus Torvalds 375216773a7SArjan van de Ven /* 376216773a7SArjan van de Ven * wait for the known devices to complete their probing 377216773a7SArjan van de Ven * 378216773a7SArjan van de Ven * Note: this is a potential source of long boot delays. 379216773a7SArjan van de Ven * For example, it is not atypical to wait 5 seconds here 380216773a7SArjan van de Ven * for the touchpad of a laptop to initialize. 381216773a7SArjan van de Ven */ 382216773a7SArjan van de Ven wait_for_device_probe(); 383d779249eSGreg Kroah-Hartman 3841da177e4SLinus Torvalds md_run_setup(); 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds if (saved_root_name[0]) { 3871da177e4SLinus Torvalds root_device_name = saved_root_name; 3882d62f488SAdrian Hunter if (!strncmp(root_device_name, "mtd", 3) || 3892d62f488SAdrian Hunter !strncmp(root_device_name, "ubi", 3)) { 390e9482b43SJoern Engel mount_block_root(root_device_name, root_mountflags); 391e9482b43SJoern Engel goto out; 392e9482b43SJoern Engel } 3931da177e4SLinus Torvalds ROOT_DEV = name_to_dev_t(root_device_name); 3941da177e4SLinus Torvalds if (strncmp(root_device_name, "/dev/", 5) == 0) 3951da177e4SLinus Torvalds root_device_name += 5; 3961da177e4SLinus Torvalds } 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds if (initrd_load()) 3991da177e4SLinus Torvalds goto out; 4001da177e4SLinus Torvalds 401cc1ed754SPierre Ossman /* wait for any asynchronous scanning to complete */ 402cc1ed754SPierre Ossman if ((ROOT_DEV == 0) && root_wait) { 403cc1ed754SPierre Ossman printk(KERN_INFO "Waiting for root device %s...\n", 404cc1ed754SPierre Ossman saved_root_name); 405cc1ed754SPierre Ossman while (driver_probe_done() != 0 || 406cc1ed754SPierre Ossman (ROOT_DEV = name_to_dev_t(saved_root_name)) == 0) 407cc1ed754SPierre Ossman msleep(100); 408216773a7SArjan van de Ven async_synchronize_full(); 409cc1ed754SPierre Ossman } 410cc1ed754SPierre Ossman 411cc1ed754SPierre Ossman is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR; 412cc1ed754SPierre Ossman 4131da177e4SLinus Torvalds if (is_floppy && rd_doload && rd_load_disk(0)) 4141da177e4SLinus Torvalds ROOT_DEV = Root_RAM0; 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds mount_root(); 4171da177e4SLinus Torvalds out: 4181da177e4SLinus Torvalds sys_mount(".", "/", NULL, MS_MOVE, NULL); 4191da177e4SLinus Torvalds sys_chroot("."); 4201da177e4SLinus Torvalds } 4211da177e4SLinus Torvalds 422