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> 185a0e3ad6STejun Heo #include <linux/slab.h> 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds #include <linux/nfs_fs.h> 211da177e4SLinus Torvalds #include <linux/nfs_fs_sb.h> 221da177e4SLinus Torvalds #include <linux/nfs_mount.h> 231da177e4SLinus Torvalds 241da177e4SLinus Torvalds #include "do_mounts.h" 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */ 271da177e4SLinus Torvalds 289b04c997STheodore Ts'o int root_mountflags = MS_RDONLY | MS_SILENT; 29f56f6d30SAdrian Bunk static char * __initdata root_device_name; 301da177e4SLinus Torvalds static char __initdata saved_root_name[64]; 31cc1ed754SPierre Ossman static int __initdata root_wait; 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds dev_t ROOT_DEV; 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds static int __init load_ramdisk(char *str) 361da177e4SLinus Torvalds { 371da177e4SLinus Torvalds rd_doload = simple_strtol(str,NULL,0) & 3; 381da177e4SLinus Torvalds return 1; 391da177e4SLinus Torvalds } 401da177e4SLinus Torvalds __setup("load_ramdisk=", load_ramdisk); 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds static int __init readonly(char *str) 431da177e4SLinus Torvalds { 441da177e4SLinus Torvalds if (*str) 451da177e4SLinus Torvalds return 0; 461da177e4SLinus Torvalds root_mountflags |= MS_RDONLY; 471da177e4SLinus Torvalds return 1; 481da177e4SLinus Torvalds } 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds static int __init readwrite(char *str) 511da177e4SLinus Torvalds { 521da177e4SLinus Torvalds if (*str) 531da177e4SLinus Torvalds return 0; 541da177e4SLinus Torvalds root_mountflags &= ~MS_RDONLY; 551da177e4SLinus Torvalds return 1; 561da177e4SLinus Torvalds } 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds __setup("ro", readonly); 591da177e4SLinus Torvalds __setup("rw", readwrite); 601da177e4SLinus Torvalds 616d0aed7aSJens Axboe #ifdef CONFIG_BLOCK 62b5af921eSWill Drewry /** 63b5af921eSWill Drewry * match_dev_by_uuid - callback for finding a partition using its uuid 64b5af921eSWill Drewry * @dev: device passed in by the caller 65b5af921eSWill Drewry * @data: opaque pointer to a 36 byte char array with a UUID 66b5af921eSWill Drewry * 67b5af921eSWill Drewry * Returns 1 if the device matches, and 0 otherwise. 68b5af921eSWill Drewry */ 6938b6f45aSJens Axboe static int match_dev_by_uuid(struct device *dev, void *data) 70b5af921eSWill Drewry { 71b5af921eSWill Drewry u8 *uuid = data; 72b5af921eSWill Drewry struct hd_struct *part = dev_to_part(dev); 73b5af921eSWill Drewry 74b5af921eSWill Drewry if (!part->info) 75b5af921eSWill Drewry goto no_match; 76b5af921eSWill Drewry 77b5af921eSWill Drewry if (memcmp(uuid, part->info->uuid, sizeof(part->info->uuid))) 78b5af921eSWill Drewry goto no_match; 79b5af921eSWill Drewry 80b5af921eSWill Drewry return 1; 81b5af921eSWill Drewry no_match: 82b5af921eSWill Drewry return 0; 83b5af921eSWill Drewry } 84b5af921eSWill Drewry 85b5af921eSWill Drewry 86b5af921eSWill Drewry /** 87b5af921eSWill Drewry * devt_from_partuuid - looks up the dev_t of a partition by its UUID 88b5af921eSWill Drewry * @uuid: 36 byte char array containing a hex ascii UUID 89b5af921eSWill Drewry * 90b5af921eSWill Drewry * The function will return the first partition which contains a matching 91b5af921eSWill Drewry * UUID value in its partition_meta_info struct. This does not search 92b5af921eSWill Drewry * by filesystem UUIDs. 93b5af921eSWill Drewry * 94b5af921eSWill Drewry * Returns the matching dev_t on success or 0 on failure. 95b5af921eSWill Drewry */ 96b5af921eSWill Drewry static dev_t __init devt_from_partuuid(char *uuid_str) 97b5af921eSWill Drewry { 98b5af921eSWill Drewry dev_t res = 0; 99b5af921eSWill Drewry struct device *dev = NULL; 100b5af921eSWill Drewry u8 uuid[16]; 101b5af921eSWill Drewry 102b5af921eSWill Drewry /* Pack the requested UUID in the expected format. */ 103b5af921eSWill Drewry part_pack_uuid(uuid_str, uuid); 104b5af921eSWill Drewry 105b5af921eSWill Drewry dev = class_find_device(&block_class, NULL, uuid, &match_dev_by_uuid); 106b5af921eSWill Drewry if (!dev) 107b5af921eSWill Drewry goto done; 108b5af921eSWill Drewry 109b5af921eSWill Drewry res = dev->devt; 110b5af921eSWill Drewry put_device(dev); 111b5af921eSWill Drewry 112b5af921eSWill Drewry done: 113b5af921eSWill Drewry return res; 114b5af921eSWill Drewry } 1156d0aed7aSJens Axboe #endif 116b5af921eSWill Drewry 1171da177e4SLinus Torvalds /* 1181da177e4SLinus Torvalds * Convert a name into device number. We accept the following variants: 1191da177e4SLinus Torvalds * 1201da177e4SLinus Torvalds * 1) device number in hexadecimal represents itself 1211da177e4SLinus Torvalds * 2) /dev/nfs represents Root_NFS (0xff) 1221da177e4SLinus Torvalds * 3) /dev/<disk_name> represents the device number of disk 1231da177e4SLinus Torvalds * 4) /dev/<disk_name><decimal> represents the device number 1241da177e4SLinus Torvalds * of partition - device number of disk plus the partition number 1251da177e4SLinus Torvalds * 5) /dev/<disk_name>p<decimal> - same as the above, that form is 1261da177e4SLinus Torvalds * used when disk name of partitioned disk ends on a digit. 127b5af921eSWill Drewry * 6) PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF representing the 128b5af921eSWill Drewry * unique id of a partition if the partition table provides it. 1291da177e4SLinus Torvalds * 130edfaa7c3SKay Sievers * If name doesn't have fall into the categories above, we return (0,0). 131edfaa7c3SKay Sievers * block_class is used to check if something is a disk name. If the disk 132edfaa7c3SKay Sievers * name contains slashes, the device name has them replaced with 133edfaa7c3SKay Sievers * bangs. 1341da177e4SLinus Torvalds */ 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds dev_t name_to_dev_t(char *name) 1371da177e4SLinus Torvalds { 1381da177e4SLinus Torvalds char s[32]; 1391da177e4SLinus Torvalds char *p; 1401da177e4SLinus Torvalds dev_t res = 0; 14130f2f0ebSKay Sievers int part; 1421da177e4SLinus Torvalds 1436d0aed7aSJens Axboe #ifdef CONFIG_BLOCK 144b5af921eSWill Drewry if (strncmp(name, "PARTUUID=", 9) == 0) { 145b5af921eSWill Drewry name += 9; 146b5af921eSWill Drewry if (strlen(name) != 36) 147b5af921eSWill Drewry goto fail; 148b5af921eSWill Drewry res = devt_from_partuuid(name); 149b5af921eSWill Drewry if (!res) 150b5af921eSWill Drewry goto fail; 151b5af921eSWill Drewry goto done; 152b5af921eSWill Drewry } 1536d0aed7aSJens Axboe #endif 154b5af921eSWill Drewry 1551da177e4SLinus Torvalds if (strncmp(name, "/dev/", 5) != 0) { 1561da177e4SLinus Torvalds unsigned maj, min; 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds if (sscanf(name, "%u:%u", &maj, &min) == 2) { 1591da177e4SLinus Torvalds res = MKDEV(maj, min); 1601da177e4SLinus Torvalds if (maj != MAJOR(res) || min != MINOR(res)) 1611da177e4SLinus Torvalds goto fail; 1621da177e4SLinus Torvalds } else { 1631da177e4SLinus Torvalds res = new_decode_dev(simple_strtoul(name, &p, 16)); 1641da177e4SLinus Torvalds if (*p) 1651da177e4SLinus Torvalds goto fail; 1661da177e4SLinus Torvalds } 1671da177e4SLinus Torvalds goto done; 1681da177e4SLinus Torvalds } 169edfaa7c3SKay Sievers 1701da177e4SLinus Torvalds name += 5; 1711da177e4SLinus Torvalds res = Root_NFS; 1721da177e4SLinus Torvalds if (strcmp(name, "nfs") == 0) 1731da177e4SLinus Torvalds goto done; 1741da177e4SLinus Torvalds res = Root_RAM0; 1751da177e4SLinus Torvalds if (strcmp(name, "ram") == 0) 1761da177e4SLinus Torvalds goto done; 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds if (strlen(name) > 31) 1791da177e4SLinus Torvalds goto fail; 1801da177e4SLinus Torvalds strcpy(s, name); 1811da177e4SLinus Torvalds for (p = s; *p; p++) 1821da177e4SLinus Torvalds if (*p == '/') 1831da177e4SLinus Torvalds *p = '!'; 18430f2f0ebSKay Sievers res = blk_lookup_devt(s, 0); 18530f2f0ebSKay Sievers if (res) 18630f2f0ebSKay Sievers goto done; 18730f2f0ebSKay Sievers 18830f2f0ebSKay Sievers /* 18930f2f0ebSKay Sievers * try non-existant, but valid partition, which may only exist 19030f2f0ebSKay Sievers * after revalidating the disk, like partitioned md devices 19130f2f0ebSKay Sievers */ 19230f2f0ebSKay Sievers while (p > s && isdigit(p[-1])) 19330f2f0ebSKay Sievers p--; 19430f2f0ebSKay Sievers if (p == s || !*p || *p == '0') 19530f2f0ebSKay Sievers goto fail; 19630f2f0ebSKay Sievers 19730f2f0ebSKay Sievers /* try disk name without <part number> */ 19830f2f0ebSKay Sievers part = simple_strtoul(p, NULL, 10); 19930f2f0ebSKay Sievers *p = '\0'; 20030f2f0ebSKay Sievers res = blk_lookup_devt(s, part); 20130f2f0ebSKay Sievers if (res) 20230f2f0ebSKay Sievers goto done; 20330f2f0ebSKay Sievers 20430f2f0ebSKay Sievers /* try disk name without p<part number> */ 20530f2f0ebSKay Sievers if (p < s + 2 || !isdigit(p[-2]) || p[-1] != 'p') 20630f2f0ebSKay Sievers goto fail; 20730f2f0ebSKay Sievers p[-1] = '\0'; 20830f2f0ebSKay Sievers res = blk_lookup_devt(s, part); 2091da177e4SLinus Torvalds if (res) 2101da177e4SLinus Torvalds goto done; 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds fail: 213edfaa7c3SKay Sievers return 0; 214edfaa7c3SKay Sievers done: 215edfaa7c3SKay Sievers return res; 2161da177e4SLinus Torvalds } 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds static int __init root_dev_setup(char *line) 2191da177e4SLinus Torvalds { 2201da177e4SLinus Torvalds strlcpy(saved_root_name, line, sizeof(saved_root_name)); 2211da177e4SLinus Torvalds return 1; 2221da177e4SLinus Torvalds } 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds __setup("root=", root_dev_setup); 2251da177e4SLinus Torvalds 226cc1ed754SPierre Ossman static int __init rootwait_setup(char *str) 227cc1ed754SPierre Ossman { 228cc1ed754SPierre Ossman if (*str) 229cc1ed754SPierre Ossman return 0; 230cc1ed754SPierre Ossman root_wait = 1; 231cc1ed754SPierre Ossman return 1; 232cc1ed754SPierre Ossman } 233cc1ed754SPierre Ossman 234cc1ed754SPierre Ossman __setup("rootwait", rootwait_setup); 235cc1ed754SPierre Ossman 2361da177e4SLinus Torvalds static char * __initdata root_mount_data; 2371da177e4SLinus Torvalds static int __init root_data_setup(char *str) 2381da177e4SLinus Torvalds { 2391da177e4SLinus Torvalds root_mount_data = str; 2401da177e4SLinus Torvalds return 1; 2411da177e4SLinus Torvalds } 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds static char * __initdata root_fs_names; 2441da177e4SLinus Torvalds static int __init fs_names_setup(char *str) 2451da177e4SLinus Torvalds { 2461da177e4SLinus Torvalds root_fs_names = str; 2471da177e4SLinus Torvalds return 1; 2481da177e4SLinus Torvalds } 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds static unsigned int __initdata root_delay; 2511da177e4SLinus Torvalds static int __init root_delay_setup(char *str) 2521da177e4SLinus Torvalds { 2531da177e4SLinus Torvalds root_delay = simple_strtoul(str, NULL, 0); 2541da177e4SLinus Torvalds return 1; 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds __setup("rootflags=", root_data_setup); 2581da177e4SLinus Torvalds __setup("rootfstype=", fs_names_setup); 2591da177e4SLinus Torvalds __setup("rootdelay=", root_delay_setup); 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds static void __init get_fs_names(char *page) 2621da177e4SLinus Torvalds { 2631da177e4SLinus Torvalds char *s = page; 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds if (root_fs_names) { 2661da177e4SLinus Torvalds strcpy(page, root_fs_names); 2671da177e4SLinus Torvalds while (*s++) { 2681da177e4SLinus Torvalds if (s[-1] == ',') 2691da177e4SLinus Torvalds s[-1] = '\0'; 2701da177e4SLinus Torvalds } 2711da177e4SLinus Torvalds } else { 2721da177e4SLinus Torvalds int len = get_filesystem_list(page); 2731da177e4SLinus Torvalds char *p, *next; 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds page[len] = '\0'; 2761da177e4SLinus Torvalds for (p = page-1; p; p = next) { 2771da177e4SLinus Torvalds next = strchr(++p, '\n'); 2781da177e4SLinus Torvalds if (*p++ != '\t') 2791da177e4SLinus Torvalds continue; 2801da177e4SLinus Torvalds while ((*s++ = *p++) != '\n') 2811da177e4SLinus Torvalds ; 2821da177e4SLinus Torvalds s[-1] = '\0'; 2831da177e4SLinus Torvalds } 2841da177e4SLinus Torvalds } 2851da177e4SLinus Torvalds *s = '\0'; 2861da177e4SLinus Torvalds } 2871da177e4SLinus Torvalds 2881da177e4SLinus Torvalds static int __init do_mount_root(char *name, char *fs, int flags, void *data) 2891da177e4SLinus Torvalds { 2901da177e4SLinus Torvalds int err = sys_mount(name, "/root", fs, flags, data); 2911da177e4SLinus Torvalds if (err) 2921da177e4SLinus Torvalds return err; 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds sys_chdir("/root"); 2956ac08c39SJan Blunck ROOT_DEV = current->fs->pwd.mnt->mnt_sb->s_dev; 296bca1033bSMarton Balint printk("VFS: Mounted root (%s filesystem)%s on device %u:%u.\n", 2976ac08c39SJan Blunck current->fs->pwd.mnt->mnt_sb->s_type->name, 2986ac08c39SJan Blunck current->fs->pwd.mnt->mnt_sb->s_flags & MS_RDONLY ? 299bca1033bSMarton Balint " readonly" : "", MAJOR(ROOT_DEV), MINOR(ROOT_DEV)); 3001da177e4SLinus Torvalds return 0; 3011da177e4SLinus Torvalds } 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds void __init mount_block_root(char *name, int flags) 3041da177e4SLinus Torvalds { 3053b5c760eSVegard Nossum char *fs_names = __getname_gfp(GFP_KERNEL 3063b5c760eSVegard Nossum | __GFP_NOTRACK_FALSE_POSITIVE); 3071da177e4SLinus Torvalds char *p; 3089361401eSDavid Howells #ifdef CONFIG_BLOCK 3091da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 3109361401eSDavid Howells #else 3119361401eSDavid Howells const char *b = name; 3129361401eSDavid Howells #endif 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds get_fs_names(fs_names); 3151da177e4SLinus Torvalds retry: 3161da177e4SLinus Torvalds for (p = fs_names; *p; p += strlen(p)+1) { 3171da177e4SLinus Torvalds int err = do_mount_root(name, p, flags, root_mount_data); 3181da177e4SLinus Torvalds switch (err) { 3191da177e4SLinus Torvalds case 0: 3201da177e4SLinus Torvalds goto out; 3211da177e4SLinus Torvalds case -EACCES: 3221da177e4SLinus Torvalds flags |= MS_RDONLY; 3231da177e4SLinus Torvalds goto retry; 3241da177e4SLinus Torvalds case -EINVAL: 3251da177e4SLinus Torvalds continue; 3261da177e4SLinus Torvalds } 3271da177e4SLinus Torvalds /* 3281da177e4SLinus Torvalds * Allow the user to distinguish between failed sys_open 3291da177e4SLinus Torvalds * and bad superblock on root device. 330dd2a345fSDave Gilbert * and give them a list of the available devices 3311da177e4SLinus Torvalds */ 3329361401eSDavid Howells #ifdef CONFIG_BLOCK 3331da177e4SLinus Torvalds __bdevname(ROOT_DEV, b); 3349361401eSDavid Howells #endif 3351da177e4SLinus Torvalds printk("VFS: Cannot open root device \"%s\" or %s\n", 3361da177e4SLinus Torvalds root_device_name, b); 337dd2a345fSDave Gilbert printk("Please append a correct \"root=\" boot option; here are the available partitions:\n"); 3381da177e4SLinus Torvalds 339dd2a345fSDave Gilbert printk_all_partitions(); 34055dc7db7STejun Heo #ifdef CONFIG_DEBUG_BLOCK_EXT_DEVT 34155dc7db7STejun Heo printk("DEBUG_BLOCK_EXT_DEVT is enabled, you need to specify " 34255dc7db7STejun Heo "explicit textual name for \"root=\" boot option.\n"); 34355dc7db7STejun Heo #endif 3441da177e4SLinus Torvalds panic("VFS: Unable to mount root fs on %s", b); 3451da177e4SLinus Torvalds } 346be6e028bSAndy Whitcroft 347dd2a345fSDave Gilbert printk("List of all partitions:\n"); 348dd2a345fSDave Gilbert printk_all_partitions(); 349be6e028bSAndy Whitcroft printk("No filesystem could mount root, tried: "); 350be6e028bSAndy Whitcroft for (p = fs_names; *p; p += strlen(p)+1) 351be6e028bSAndy Whitcroft printk(" %s", p); 352be6e028bSAndy Whitcroft printk("\n"); 3539361401eSDavid Howells #ifdef CONFIG_BLOCK 3549361401eSDavid Howells __bdevname(ROOT_DEV, b); 3559361401eSDavid Howells #endif 3569361401eSDavid Howells panic("VFS: Unable to mount root fs on %s", b); 3571da177e4SLinus Torvalds out: 3581da177e4SLinus Torvalds putname(fs_names); 3591da177e4SLinus Torvalds } 3601da177e4SLinus Torvalds 3611da177e4SLinus Torvalds #ifdef CONFIG_ROOT_NFS 3621da177e4SLinus Torvalds static int __init mount_nfs_root(void) 3631da177e4SLinus Torvalds { 3641da177e4SLinus Torvalds void *data = nfs_root_data(); 3651da177e4SLinus Torvalds 366bdaf8529SGreg Kroah-Hartman create_dev("/dev/root", ROOT_DEV); 3671da177e4SLinus Torvalds if (data && 3681da177e4SLinus Torvalds do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0) 3691da177e4SLinus Torvalds return 1; 3701da177e4SLinus Torvalds return 0; 3711da177e4SLinus Torvalds } 3721da177e4SLinus Torvalds #endif 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds #if defined(CONFIG_BLK_DEV_RAM) || defined(CONFIG_BLK_DEV_FD) 3751da177e4SLinus Torvalds void __init change_floppy(char *fmt, ...) 3761da177e4SLinus Torvalds { 3771da177e4SLinus Torvalds struct termios termios; 3781da177e4SLinus Torvalds char buf[80]; 3791da177e4SLinus Torvalds char c; 3801da177e4SLinus Torvalds int fd; 3811da177e4SLinus Torvalds va_list args; 3821da177e4SLinus Torvalds va_start(args, fmt); 3831da177e4SLinus Torvalds vsprintf(buf, fmt, args); 3841da177e4SLinus Torvalds va_end(args); 3851da177e4SLinus Torvalds fd = sys_open("/dev/root", O_RDWR | O_NDELAY, 0); 3861da177e4SLinus Torvalds if (fd >= 0) { 3871da177e4SLinus Torvalds sys_ioctl(fd, FDEJECT, 0); 3881da177e4SLinus Torvalds sys_close(fd); 3891da177e4SLinus Torvalds } 3901da177e4SLinus Torvalds printk(KERN_NOTICE "VFS: Insert %s and press ENTER\n", buf); 3911da177e4SLinus Torvalds fd = sys_open("/dev/console", O_RDWR, 0); 3921da177e4SLinus Torvalds if (fd >= 0) { 3931da177e4SLinus Torvalds sys_ioctl(fd, TCGETS, (long)&termios); 3941da177e4SLinus Torvalds termios.c_lflag &= ~ICANON; 3951da177e4SLinus Torvalds sys_ioctl(fd, TCSETSF, (long)&termios); 3961da177e4SLinus Torvalds sys_read(fd, &c, 1); 3971da177e4SLinus Torvalds termios.c_lflag |= ICANON; 3981da177e4SLinus Torvalds sys_ioctl(fd, TCSETSF, (long)&termios); 3991da177e4SLinus Torvalds sys_close(fd); 4001da177e4SLinus Torvalds } 4011da177e4SLinus Torvalds } 4021da177e4SLinus Torvalds #endif 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds void __init mount_root(void) 4051da177e4SLinus Torvalds { 4061da177e4SLinus Torvalds #ifdef CONFIG_ROOT_NFS 4071da177e4SLinus Torvalds if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) { 4081da177e4SLinus Torvalds if (mount_nfs_root()) 4091da177e4SLinus Torvalds return; 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n"); 4121da177e4SLinus Torvalds ROOT_DEV = Root_FD0; 4131da177e4SLinus Torvalds } 4141da177e4SLinus Torvalds #endif 4151da177e4SLinus Torvalds #ifdef CONFIG_BLK_DEV_FD 4161da177e4SLinus Torvalds if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) { 4171da177e4SLinus Torvalds /* rd_doload is 2 for a dual initrd/ramload setup */ 4181da177e4SLinus Torvalds if (rd_doload==2) { 4191da177e4SLinus Torvalds if (rd_load_disk(1)) { 4201da177e4SLinus Torvalds ROOT_DEV = Root_RAM1; 4211da177e4SLinus Torvalds root_device_name = NULL; 4221da177e4SLinus Torvalds } 4231da177e4SLinus Torvalds } else 4241da177e4SLinus Torvalds change_floppy("root floppy"); 4251da177e4SLinus Torvalds } 4261da177e4SLinus Torvalds #endif 4279361401eSDavid Howells #ifdef CONFIG_BLOCK 428bdaf8529SGreg Kroah-Hartman create_dev("/dev/root", ROOT_DEV); 4291da177e4SLinus Torvalds mount_block_root("/dev/root", root_mountflags); 4309361401eSDavid Howells #endif 4311da177e4SLinus Torvalds } 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds /* 4341da177e4SLinus Torvalds * Prepare the namespace - decide what/where to mount, load ramdisks, etc. 4351da177e4SLinus Torvalds */ 4361da177e4SLinus Torvalds void __init prepare_namespace(void) 4371da177e4SLinus Torvalds { 4381da177e4SLinus Torvalds int is_floppy; 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds if (root_delay) { 4411da177e4SLinus Torvalds printk(KERN_INFO "Waiting %dsec before mounting root device...\n", 4421da177e4SLinus Torvalds root_delay); 4431da177e4SLinus Torvalds ssleep(root_delay); 4441da177e4SLinus Torvalds } 4451da177e4SLinus Torvalds 446216773a7SArjan van de Ven /* 447216773a7SArjan van de Ven * wait for the known devices to complete their probing 448216773a7SArjan van de Ven * 449216773a7SArjan van de Ven * Note: this is a potential source of long boot delays. 450216773a7SArjan van de Ven * For example, it is not atypical to wait 5 seconds here 451216773a7SArjan van de Ven * for the touchpad of a laptop to initialize. 452216773a7SArjan van de Ven */ 453216773a7SArjan van de Ven wait_for_device_probe(); 454d779249eSGreg Kroah-Hartman 4551da177e4SLinus Torvalds md_run_setup(); 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds if (saved_root_name[0]) { 4581da177e4SLinus Torvalds root_device_name = saved_root_name; 4592d62f488SAdrian Hunter if (!strncmp(root_device_name, "mtd", 3) || 4602d62f488SAdrian Hunter !strncmp(root_device_name, "ubi", 3)) { 461e9482b43SJoern Engel mount_block_root(root_device_name, root_mountflags); 462e9482b43SJoern Engel goto out; 463e9482b43SJoern Engel } 4641da177e4SLinus Torvalds ROOT_DEV = name_to_dev_t(root_device_name); 4651da177e4SLinus Torvalds if (strncmp(root_device_name, "/dev/", 5) == 0) 4661da177e4SLinus Torvalds root_device_name += 5; 4671da177e4SLinus Torvalds } 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds if (initrd_load()) 4701da177e4SLinus Torvalds goto out; 4711da177e4SLinus Torvalds 472cc1ed754SPierre Ossman /* wait for any asynchronous scanning to complete */ 473cc1ed754SPierre Ossman if ((ROOT_DEV == 0) && root_wait) { 474cc1ed754SPierre Ossman printk(KERN_INFO "Waiting for root device %s...\n", 475cc1ed754SPierre Ossman saved_root_name); 476cc1ed754SPierre Ossman while (driver_probe_done() != 0 || 477cc1ed754SPierre Ossman (ROOT_DEV = name_to_dev_t(saved_root_name)) == 0) 478cc1ed754SPierre Ossman msleep(100); 479216773a7SArjan van de Ven async_synchronize_full(); 480cc1ed754SPierre Ossman } 481cc1ed754SPierre Ossman 482cc1ed754SPierre Ossman is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR; 483cc1ed754SPierre Ossman 4841da177e4SLinus Torvalds if (is_floppy && rd_doload && rd_load_disk(0)) 4851da177e4SLinus Torvalds ROOT_DEV = Root_RAM0; 4861da177e4SLinus Torvalds 4871da177e4SLinus Torvalds mount_root(); 4881da177e4SLinus Torvalds out: 4892b2af54aSKay Sievers devtmpfs_mount("dev"); 4901da177e4SLinus Torvalds sys_mount(".", "/", NULL, MS_MOVE, NULL); 4911da177e4SLinus Torvalds sys_chroot("."); 4921da177e4SLinus Torvalds } 493