| Start/ | End/ | |||
| True | False | - | Line | Source |
| 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> | |||
| 10 | #include <linux/mount.h> | |||
| 11 | ||||
| 12 | #include <linux/nfs_fs.h> | |||
| 13 | #include <linux/nfs_fs_sb.h> | |||
| 14 | #include <linux/nfs_mount.h> | |||
| 15 | ||||
| 16 | #include "do_mounts.h" | |||
| 17 | ||||
| 18 | extern int get_filesystem_list(char * buf); | |||
| 19 | ||||
| 20 | int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */ | |||
| 21 | ||||
| 22 | int root_mountflags = MS_RDONLY | MS_VERBOSE; | |||
| 23 | char * __initdata root_device_name; | |||
| 24 | static char __initdata saved_root_name[64]; | |||
| 25 | ||||
| 26 | /* this is initialized in init/main.c */ | |||
| 27 | dev_t ROOT_DEV; | |||
| 28 | ||||
| 0 | 0 | - | 29 | static int __init load_ramdisk(char *str) |
| 30 | { | |||
| 31 | rd_doload = simple_strtol(str,NULL,0) & 3; | |||
| 0 | - | 32 | return 1; | |
| 33 | } | |||
| 34 | __setup("load_ramdisk=", load_ramdisk); | |||
| 35 | ||||
| 0 | 0 | - | 36 | static int __init readonly(char *str) |
| 37 | { | |||
| 0 | 0 | - | 38 | if (*str) |
| 0 | - | 39 | return 0; | |
| 40 | root_mountflags |= MS_RDONLY; | |||
| 0 | - | 41 | return 1; | |
| 42 | } | |||
| 43 | ||||
| 0 | 0 | - | 44 | static int __init readwrite(char *str) |
| 45 | { | |||
| 0 | 0 | - | 46 | if (*str) |
| 0 | - | 47 | return 0; | |
| 48 | root_mountflags &= ~MS_RDONLY; | |||
| 0 | - | 49 | return 1; | |
| 50 | } | |||
| 51 | ||||
| 52 | __setup("ro", readonly); | |||
| 53 | __setup("rw", readwrite); | |||
| 54 | ||||
| 6 | 0 | 55 | static dev_t try_name(char *name, int part) | |
| 56 | { | |||
| 57 | char path[64]; | |||
| 58 | char buf[32]; | |||
| 59 | int range; | |||
| 60 | dev_t res; | |||
| 61 | char *s; | |||
| 62 | int len; | |||
| 63 | int fd; | |||
| 64 | unsigned int maj, min; | |||
| 65 | ||||
| 66 | /* read device number from .../dev */ | |||
| 67 | ||||
| 68 | sprintf(path, "/sys/block/%s/dev", name); | |||
| 69 | fd = sys_open(path, 0, 0); | |||
| 3 | 3 | 70 | if (fd < 0) | |
| 3 | 71 | goto fail; | ||
| 72 | len = sys_read(fd, buf, 32); | |||
| 73 | sys_close(fd); | |||
| 0 | 3 | - | 74 | if (len <= 0 || len == 32 || buf[len - 1] != '\n') |
| 0 | - | 74 | T || _ || _ | |
| 0 | - | 74 | F || T || _ | |
| 0 | - | 74 | F || F || T | |
| 3 | 74 | F || F || F | ||
| 0 | - | 75 | goto fail; | |
| 76 | buf[len - 1] = '\0'; | |||
| 3 | 0 | - | 77 | if (sscanf(buf, "%u:%u", &maj, &min) == 2) { |
| 78 | /* | |||
| 79 | * Try the %u:%u format -- see print_dev_t() | |||
| 80 | */ | |||
| 81 | res = MKDEV(maj, min); | |||
| 0 | 3 | - | 82 | if (maj != MAJOR(res) || min != MINOR(res)) |
| 0 | - | 82 | T || _ | |
| 0 | - | 82 | F || T | |
| 3 | 82 | F || F | ||
| 0 | - | 83 | goto fail; | |
| 84 | } else { | |||
| 85 | /* | |||
| 86 | * Nope. Try old-style "0321" | |||
| 87 | */ | |||
| 88 | res = new_decode_dev(simple_strtoul(buf, &s, 16)); | |||
| 0 | 0 | - | 89 | if (*s) |
| 0 | - | 90 | goto fail; | |
| 91 | } | |||
| 92 | ||||
| 93 | /* if it's there and we are not looking for a partition - that's it */ | |||
| 0 | 3 | - | 94 | if (!part) |
| 0 | - | 95 | return res; | |
| 96 | ||||
| 97 | /* otherwise read range from .../range */ | |||
| 98 | sprintf(path, "/sys/block/%s/range", name); | |||
| 99 | fd = sys_open(path, 0, 0); | |||
| 0 | 3 | - | 100 | if (fd < 0) |
| 0 | - | 101 | goto fail; | |
| 102 | len = sys_read(fd, buf, 32); | |||
| 103 | sys_close(fd); | |||
| 0 | 3 | - | 104 | if (len <= 0 || len == 32 || buf[len - 1] != '\n') |
| 0 | - | 104 | T || _ || _ | |
| 0 | - | 104 | F || T || _ | |
| 0 | - | 104 | F || F || T | |
| 3 | 104 | F || F || F | ||
| 0 | - | 105 | goto fail; | |
| 106 | buf[len - 1] = '\0'; | |||
| 107 | range = simple_strtoul(buf, &s, 10); | |||
| 0 | 3 | - | 108 | if (*s) |
| 0 | - | 109 | goto fail; | |
| 110 | ||||
| 111 | /* if partition is within range - we got it */ | |||
| 3 | 0 | - | 112 | if (part < range) |
| 3 | 113 | return res + part; | ||
| 114 | fail: | |||
| 3 | 115 | return 0; | ||
| 116 | } | |||
| 117 | ||||
| 118 | /* | |||
| 119 | * Convert a name into device number. We accept the following variants: | |||
| 120 | * | |||
| 121 | * 1) device number in hexadecimal represents itself | |||
| 122 | * 2) /dev/nfs represents Root_NFS (0xff) | |||
| 123 | * 3) /dev/<disk_name> represents the device number of disk | |||
| 124 | * 4) /dev/<disk_name><decimal> represents the device number | |||
| 125 | * of partition - device number of disk plus the partition number | |||
| 126 | * 5) /dev/<disk_name>p<decimal> - same as the above, that form is | |||
| 127 | * used when disk name of partitioned disk ends on a digit. | |||
| 128 | * | |||
| 129 | * If name doesn't have fall into the categories above, we return 0. | |||
| 130 | * Sysfs is used to check if something is a disk name - it has | |||
| 131 | * all known disks under bus/block/devices. If the disk name | |||
| 132 | * contains slashes, name of sysfs node has them replaced with | |||
| 133 | * bangs. try_name() does the actual checks, assuming that sysfs | |||
| 134 | * is mounted on rootfs /sys. | |||
| 135 | */ | |||
| 136 | ||||
| 3 | 0 | 137 | dev_t name_to_dev_t(char *name) | |
| 138 | { | |||
| 139 | char s[32]; | |||
| 140 | char *p; | |||
| 141 | dev_t res = 0; | |||
| 142 | int part; | |||
| 143 | ||||
| 144 | #ifdef CONFIG_SYSFS | |||
| 145 | int mkdir_err = sys_mkdir("/sys", 0700); | |||
| 0 | 3 | - | 146 | if (sys_mount("sysfs", "/sys", "sysfs", 0, NULL) < 0) |
| 0 | - | 147 | goto out; | |
| 148 | #endif | |||
| 149 | ||||
| 0 | 3 | - | 150 | if (strncmp(name, "/dev/", 5) != 0) { |
| 151 | unsigned maj, min; | |||
| 152 | ||||
| 0 | 0 | - | 153 | if (sscanf(name, "%u:%u", &maj, &min) == 2) { |
| 154 | res = MKDEV(maj, min); | |||
| 0 | 0 | - | 155 | if (maj != MAJOR(res) || min != MINOR(res)) |
| 0 | - | 155 | T || _ | |
| 0 | - | 155 | F || T | |
| 0 | - | 155 | F || F | |
| 0 | - | 156 | goto fail; | |
| 157 | } else { | |||
| 158 | res = new_decode_dev(simple_strtoul(name, &p, 16)); | |||
| 0 | 0 | - | 159 | if (*p) |
| 0 | - | 160 | goto fail; | |
| 161 | } | |||
| 0 | - | 162 | goto done; | |
| 163 | } | |||
| 164 | name += 5; | |||
| 165 | res = Root_NFS; | |||
| 0 | 3 | - | 166 | if (strcmp(name, "nfs") == 0) |
| 0 | - | 167 | goto done; | |
| 168 | res = Root_RAM0; | |||
| 0 | 3 | - | 169 | if (strcmp(name, "ram") == 0) |
| 0 | - | 170 | goto done; | |
| 171 | ||||
| 0 | 3 | - | 172 | if (strlen(name) > 31) |
| 0 | - | 173 | goto fail; | |
| 174 | strcpy(s, name); | |||
| 12 | 3 | 175 | for (p = s; *p; p++) | |
| 0 | 12 | - | 176 | if (*p == '/') |
| 177 | *p = '!'; | |||
| 178 | res = try_name(s, 0); | |||
| 0 | 3 | - | 179 | if (res) |
| 0 | - | 180 | goto done; | |
| 181 | ||||
| 3 | 3 | 182 | while (p > s && isdigit(p[-1])) | |
| 3 | 182 | T && (T) | ||
| 3 | 182 | T && (F) | ||
| 0 | - | 182 | F && (_) | |
| 183 | p--; | |||
| 0 | 3 | - | 184 | if (p == s || !*p || *p == '0') |
| 0 | - | 184 | T || _ || _ | |
| 0 | - | 184 | F || T || _ | |
| 0 | - | 184 | F || F || T | |
| 3 | 184 | F || F || F | ||
| 0 | - | 185 | goto fail; | |
| 186 | part = simple_strtoul(p, NULL, 10); | |||
| 187 | *p = '\0'; | |||
| 188 | res = try_name(s, part); | |||
| 3 | 0 | - | 189 | if (res) |
| 3 | 190 | goto done; | ||
| 191 | ||||
| 0 | 0 | - | 192 | if (p < s + 2 || !isdigit(p[-2]) || p[-1] != 'p') |
| 0 | - | 192 | T || !(_) || _ | |
| 0 | - | 192 | F || !(T) || T | |
| 0 | - | 192 | F || !(F) || _ | |
| 0 | - | 192 | F || !(T) || F | |
| 0 | - | 193 | goto fail; | |
| 194 | p[-1] = '\0'; | |||
| 195 | res = try_name(s, part); | |||
| 196 | done: | |||
| 197 | #ifdef CONFIG_SYSFS | |||
| 198 | sys_umount("/sys", 0); | |||
| 199 | out: | |||
| 3 | 0 | - | 200 | if (!mkdir_err) |
| 201 | sys_rmdir("/sys"); | |||
| 202 | #endif | |||
| 3 | 203 | return res; | ||
| 204 | fail: | |||
| 205 | res = 0; | |||
| 0 | - | 206 | goto done; | |
| 207 | } | |||
| 208 | ||||
| 3 | 0 | 209 | static int __init root_dev_setup(char *line) | |
| 210 | { | |||
| 211 | strlcpy(saved_root_name, line, sizeof(saved_root_name)); | |||
| 3 | 212 | return 1; | ||
| 213 | } | |||
| 214 | ||||
| 215 | __setup("root=", root_dev_setup); | |||
| 216 | ||||
| 217 | static char * __initdata root_mount_data; | |||
| 0 | 0 | - | 218 | static int __init root_data_setup(char *str) |
| 219 | { | |||
| 220 | root_mount_data = str; | |||
| 0 | - | 221 | return 1; | |
| 222 | } | |||
| 223 | ||||
| 224 | static char * __initdata root_fs_names; | |||
| 0 | 0 | - | 225 | static int __init fs_names_setup(char *str) |
| 226 | { | |||
| 227 | root_fs_names = str; | |||
| 0 | - | 228 | return 1; | |
| 229 | } | |||
| 230 | ||||
| 231 | static unsigned int __initdata root_delay; | |||
| 0 | 0 | - | 232 | static int __init root_delay_setup(char *str) |
| 233 | { | |||
| 234 | root_delay = simple_strtoul(str, NULL, 0); | |||
| 0 | - | 235 | return 1; | |
| 236 | } | |||
| 237 | ||||
| 238 | __setup("rootflags=", root_data_setup); | |||
| 239 | __setup("rootfstype=", fs_names_setup); | |||
| 240 | __setup("rootdelay=", root_delay_setup); | |||
| 241 | ||||
| 3 | 3 | 242 | static void __init get_fs_names(char *page) | |
| 243 | { | |||
| 244 | char *s = page; | |||
| 245 | ||||
| 0 | 3 | - | 246 | if (root_fs_names) { |
| 247 | strcpy(page, root_fs_names); | |||
| 0 | 0 | - | 248 | while (*s++) { |
| 0 | 0 | - | 249 | if (s[-1] == ',') |
| 250 | s[-1] = '\0'; | |||
| 251 | } | |||
| 252 | } else { | |||
| 253 | int len = get_filesystem_list(page); | |||
| 254 | char *p, *next; | |||
| 255 | ||||
| 256 | page[len] = '\0'; | |||
| 93 | 3 | 257 | for (p = page-1; p; p = next) { | |
| 258 | next = strchr(++p, '\n'); | |||
| 75 | 18 | 259 | if (*p++ != '\t') | |
| 75 | 260 | continue; | ||
| 81 | 18 | 261 | while ((*s++ = *p++) != '\n') | |
| 262 | ; | |||
| 263 | s[-1] = '\0'; | |||
| 264 | } | |||
| 265 | } | |||
| 266 | *s = '\0'; | |||
| 267 | } | |||
| 268 | ||||
| 3 | 0 | 269 | static int __init do_mount_root(char *name, char *fs, int flags, void *data) | |
| 270 | { | |||
| 271 | int err = sys_mount(name, "/root", fs, flags, data); | |||
| 0 | 3 | - | 272 | if (err) |
| 0 | - | 273 | return err; | |
| 274 | ||||
| 275 | sys_chdir("/root"); | |||
| 276 | ROOT_DEV = current->fs->pwdmnt->mnt_sb->s_dev; | |||
| 277 | printk("VFS: Mounted root (%s filesystem)%s.\n", | |||
| 278 | current->fs->pwdmnt->mnt_sb->s_type->name, | |||
| 279 | current->fs->pwdmnt->mnt_sb->s_flags & MS_RDONLY ? | |||
| 3 | 0 | - | 279 | ternary-?: get_current ( ) -> fs -> pwdmnt -> .. |
| 280 | " readonly" : ""); | |||
| 3 | 281 | return 0; | ||
| 282 | } | |||
| 283 | ||||
| 3 | 3 | 284 | void __init mount_block_root(char *name, int flags) | |
| 285 | { | |||
| 286 | char *fs_names = __getname(); | |||
| 287 | char *p; | |||
| 288 | char b[BDEVNAME_SIZE]; | |||
| 289 | ||||
| 290 | get_fs_names(fs_names); | |||
| 291 | retry: | |||
| 3 | 0 | - | 292 | for (p = fs_names; *p; p += strlen(p)+1) { |
| 293 | int err = do_mount_root(name, p, flags, root_mount_data); | |||
| 294 | switch (err) { | |||
| 3 | 295 | case 0: | ||
| 3 | 296 | goto out; | ||
| 0 | - | 297 | case -EACCES: | |
| 298 | flags |= MS_RDONLY; | |||
| 0 | - | 299 | goto retry; | |
| 0 | - | 300 | case -EINVAL: | |
| 0 | - | 301 | continue; | |
| 302 | } | |||
| 303 | /* | |||
| 304 | * Allow the user to distinguish between failed sys_open | |||
| 305 | * and bad superblock on root device. | |||
| 306 | */ | |||
| 307 | __bdevname(ROOT_DEV, b); | |||
| 308 | printk("VFS: Cannot open root device \"%s\" or %s\n", | |||
| 309 | root_device_name, b); | |||
| 310 | printk("Please append a correct \"root=\" boot option\n"); | |||
| 311 | ||||
| 312 | panic("VFS: Unable to mount root fs on %s", b); | |||
| 313 | } | |||
| 314 | panic("VFS: Unable to mount root fs on %s", __bdevname(ROOT_DEV, b)); | |||
| 315 | out: | |||
| 316 | putname(fs_names); | |||
| 317 | } | |||
| 318 | ||||
| 319 | #ifdef CONFIG_ROOT_NFS | |||
| 320 | static int __init mount_nfs_root(void) | |||
| 321 | { | |||
| 322 | void *data = nfs_root_data(); | |||
| 323 | ||||
| 324 | create_dev("/dev/root", ROOT_DEV, NULL); | |||
| 325 | if (data && | |||
| 326 | do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0) | |||
| 327 | return 1; | |||
| 328 | return 0; | |||
| 329 | } | |||
| 330 | #endif | |||
| 331 | ||||
| 332 | #if defined(CONFIG_BLK_DEV_RAM) || defined(CONFIG_BLK_DEV_FD) | |||
| 333 | void __init change_floppy(char *fmt, ...) | |||
| 334 | { | |||
| 335 | struct termios termios; | |||
| 336 | char buf[80]; | |||
| 337 | char c; | |||
| 338 | int fd; | |||
| 339 | va_list args; | |||
| 340 | va_start(args, fmt); | |||
| 341 | vsprintf(buf, fmt, args); | |||
| 342 | va_end(args); | |||
| 343 | fd = sys_open("/dev/root", O_RDWR | O_NDELAY, 0); | |||
| 344 | if (fd >= 0) { | |||
| 345 | sys_ioctl(fd, FDEJECT, 0); | |||
| 346 | sys_close(fd); | |||
| 347 | } | |||
| 348 | printk(KERN_NOTICE "VFS: Insert %s and press ENTER\n", buf); | |||
| 349 | fd = sys_open("/dev/console", O_RDWR, 0); | |||
| 350 | if (fd >= 0) { | |||
| 351 | sys_ioctl(fd, TCGETS, (long)&termios); | |||
| 352 | termios.c_lflag &= ~ICANON; | |||
| 353 | sys_ioctl(fd, TCSETSF, (long)&termios); | |||
| 354 | sys_read(fd, &c, 1); | |||
| 355 | termios.c_lflag |= ICANON; | |||
| 356 | sys_ioctl(fd, TCSETSF, (long)&termios); | |||
| 357 | sys_close(fd); | |||
| 358 | } | |||
| 359 | } | |||
| 360 | #endif | |||
| 361 | ||||
| 3 | 3 | 362 | void __init mount_root(void) | |
| 363 | { | |||
| 364 | #ifdef CONFIG_ROOT_NFS | |||
| 365 | if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) { | |||
| 366 | if (mount_nfs_root()) | |||
| 367 | return; | |||
| 368 | ||||
| 369 | printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n"); | |||
| 370 | ROOT_DEV = Root_FD0; | |||
| 371 | } | |||
| 372 | #endif | |||
| 373 | #ifdef CONFIG_BLK_DEV_FD | |||
| 374 | if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) { | |||
| 375 | /* rd_doload is 2 for a dual initrd/ramload setup */ | |||
| 376 | if (rd_doload==2) { | |||
| 377 | if (rd_load_disk(1)) { | |||
| 378 | ROOT_DEV = Root_RAM1; | |||
| 379 | root_device_name = NULL; | |||
| 380 | } | |||
| 381 | } else | |||
| 382 | change_floppy("root floppy"); | |||
| 383 | } | |||
| 384 | #endif | |||
| 385 | create_dev("/dev/root", ROOT_DEV, root_device_name); | |||
| 386 | mount_block_root("/dev/root", root_mountflags); | |||
| 387 | } | |||
| 388 | ||||
| 389 | /* | |||
| 390 | * Prepare the namespace - decide what/where to mount, load ramdisks, etc. | |||
| 391 | */ | |||
| 3 | 3 | 392 | void __init prepare_namespace(void) | |
| 393 | { | |||
| 394 | int is_floppy; | |||
| 395 | ||||
| 396 | mount_devfs(); | |||
| 397 | ||||
| 0 | 3 | - | 398 | if (root_delay) { |
| 399 | printk(KERN_INFO "Waiting %dsec before mounting root device...\n", | |||
| 400 | root_delay); | |||
| 401 | ssleep(root_delay); | |||
| 402 | } | |||
| 403 | ||||
| 404 | md_run_setup(); | |||
| 405 | ||||
| 3 | 0 | - | 406 | if (saved_root_name[0]) { |
| 407 | root_device_name = saved_root_name; | |||
| 408 | ROOT_DEV = name_to_dev_t(root_device_name); | |||
| 3 | 0 | - | 409 | if (strncmp(root_device_name, "/dev/", 5) == 0) |
| 410 | root_device_name += 5; | |||
| 411 | } | |||
| 412 | ||||
| 413 | is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR; | |||
| 414 | ||||
| 0 | 3 | - | 415 | if (initrd_load()) |
| 0 | - | 416 | goto out; | |
| 417 | ||||
| 0 | 3 | - | 418 | if (is_floppy && rd_doload && rd_load_disk(0)) |
| 0 | - | 418 | T && T && T | |
| 0 | - | 418 | T && T && F | |
| 0 | - | 418 | T && F && _ | |
| 3 | 418 | F && _ && _ | ||
| 419 | ROOT_DEV = Root_RAM0; | |||
| 420 | ||||
| 421 | mount_root(); | |||
| 422 | out: | |||
| 423 | umount_devfs("/dev"); | |||
| 424 | sys_mount(".", "/", NULL, MS_MOVE, NULL); | |||
| 425 | sys_chroot("."); | |||
| 426 | security_sb_post_mountroot(); | |||
| 427 | mount_devfs_fs (); | |||
| 428 | } | |||
| 429 | ||||
| ***TER 38% (64/169) of SOURCE FILE do_mounts.c | ||||