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Commit | Line | Data |
---|---|---|
c67e5382 HS |
1 | /* |
2 | * Many of the syscalls used in this file expect some of the arguments | |
3 | * to be __user pointers not __kernel pointers. To limit the sparse | |
4 | * noise, turn off sparse checking for this file. | |
5 | */ | |
6 | #ifdef __CHECKER__ | |
7 | #undef __CHECKER__ | |
8 | #warning "Sparse checking disabled for this file" | |
9 | #endif | |
10 | ||
1da177e4 LT |
11 | #include <linux/init.h> |
12 | #include <linux/fs.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/types.h> | |
15 | #include <linux/fcntl.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/string.h> | |
df52092f | 18 | #include <linux/dirent.h> |
1da177e4 | 19 | #include <linux/syscalls.h> |
889d51a1 | 20 | #include <linux/utime.h> |
1da177e4 | 21 | |
38747439 YL |
22 | static ssize_t __init xwrite(int fd, const char *p, size_t count) |
23 | { | |
24 | ssize_t out = 0; | |
25 | ||
26 | /* sys_write only can write MAX_RW_COUNT aka 2G-4K bytes at most */ | |
27 | while (count) { | |
28 | ssize_t rv = sys_write(fd, p, count); | |
29 | ||
30 | if (rv < 0) { | |
31 | if (rv == -EINTR || rv == -EAGAIN) | |
32 | continue; | |
33 | return out ? out : rv; | |
34 | } else if (rv == 0) | |
35 | break; | |
36 | ||
37 | p += rv; | |
38 | out += rv; | |
39 | count -= rv; | |
40 | } | |
41 | ||
42 | return out; | |
43 | } | |
44 | ||
1da177e4 LT |
45 | static __initdata char *message; |
46 | static void __init error(char *x) | |
47 | { | |
48 | if (!message) | |
49 | message = x; | |
50 | } | |
51 | ||
1da177e4 LT |
52 | /* link hash */ |
53 | ||
6a050da4 MH |
54 | #define N_ALIGN(len) ((((len) + 1) & ~3) + 2) |
55 | ||
1da177e4 LT |
56 | static __initdata struct hash { |
57 | int ino, minor, major; | |
685dd2d5 | 58 | umode_t mode; |
1da177e4 | 59 | struct hash *next; |
6a050da4 | 60 | char name[N_ALIGN(PATH_MAX)]; |
1da177e4 LT |
61 | } *head[32]; |
62 | ||
63 | static inline int hash(int major, int minor, int ino) | |
64 | { | |
65 | unsigned long tmp = ino + minor + (major << 3); | |
66 | tmp += tmp >> 5; | |
67 | return tmp & 31; | |
68 | } | |
69 | ||
2139a7fb | 70 | static char __init *find_link(int major, int minor, int ino, |
685dd2d5 | 71 | umode_t mode, char *name) |
1da177e4 LT |
72 | { |
73 | struct hash **p, *q; | |
74 | for (p = head + hash(major, minor, ino); *p; p = &(*p)->next) { | |
75 | if ((*p)->ino != ino) | |
76 | continue; | |
77 | if ((*p)->minor != minor) | |
78 | continue; | |
79 | if ((*p)->major != major) | |
80 | continue; | |
2139a7fb PA |
81 | if (((*p)->mode ^ mode) & S_IFMT) |
82 | continue; | |
1da177e4 LT |
83 | return (*p)->name; |
84 | } | |
3265e66b | 85 | q = kmalloc(sizeof(struct hash), GFP_KERNEL); |
1da177e4 LT |
86 | if (!q) |
87 | panic("can't allocate link hash entry"); | |
1da177e4 | 88 | q->major = major; |
2139a7fb PA |
89 | q->minor = minor; |
90 | q->ino = ino; | |
91 | q->mode = mode; | |
6a050da4 | 92 | strcpy(q->name, name); |
1da177e4 LT |
93 | q->next = NULL; |
94 | *p = q; | |
95 | return NULL; | |
96 | } | |
97 | ||
98 | static void __init free_hash(void) | |
99 | { | |
100 | struct hash **p, *q; | |
101 | for (p = head; p < head + 32; p++) { | |
102 | while (*p) { | |
103 | q = *p; | |
104 | *p = q->next; | |
3265e66b | 105 | kfree(q); |
1da177e4 LT |
106 | } |
107 | } | |
108 | } | |
109 | ||
c67e5382 | 110 | static long __init do_utime(char *filename, time_t mtime) |
889d51a1 NL |
111 | { |
112 | struct timespec t[2]; | |
113 | ||
114 | t[0].tv_sec = mtime; | |
115 | t[0].tv_nsec = 0; | |
116 | t[1].tv_sec = mtime; | |
117 | t[1].tv_nsec = 0; | |
118 | ||
119 | return do_utimes(AT_FDCWD, filename, t, AT_SYMLINK_NOFOLLOW); | |
120 | } | |
121 | ||
122 | static __initdata LIST_HEAD(dir_list); | |
123 | struct dir_entry { | |
124 | struct list_head list; | |
125 | char *name; | |
126 | time_t mtime; | |
127 | }; | |
128 | ||
129 | static void __init dir_add(const char *name, time_t mtime) | |
130 | { | |
131 | struct dir_entry *de = kmalloc(sizeof(struct dir_entry), GFP_KERNEL); | |
132 | if (!de) | |
133 | panic("can't allocate dir_entry buffer"); | |
134 | INIT_LIST_HEAD(&de->list); | |
135 | de->name = kstrdup(name, GFP_KERNEL); | |
136 | de->mtime = mtime; | |
137 | list_add(&de->list, &dir_list); | |
138 | } | |
139 | ||
140 | static void __init dir_utime(void) | |
141 | { | |
142 | struct dir_entry *de, *tmp; | |
143 | list_for_each_entry_safe(de, tmp, &dir_list, list) { | |
144 | list_del(&de->list); | |
145 | do_utime(de->name, de->mtime); | |
146 | kfree(de->name); | |
147 | kfree(de); | |
148 | } | |
149 | } | |
150 | ||
151 | static __initdata time_t mtime; | |
152 | ||
1da177e4 LT |
153 | /* cpio header parsing */ |
154 | ||
155 | static __initdata unsigned long ino, major, minor, nlink; | |
685dd2d5 | 156 | static __initdata umode_t mode; |
1da177e4 LT |
157 | static __initdata unsigned long body_len, name_len; |
158 | static __initdata uid_t uid; | |
159 | static __initdata gid_t gid; | |
160 | static __initdata unsigned rdev; | |
161 | ||
162 | static void __init parse_header(char *s) | |
163 | { | |
164 | unsigned long parsed[12]; | |
165 | char buf[9]; | |
166 | int i; | |
167 | ||
168 | buf[8] = '\0'; | |
169 | for (i = 0, s += 6; i < 12; i++, s += 8) { | |
170 | memcpy(buf, s, 8); | |
171 | parsed[i] = simple_strtoul(buf, NULL, 16); | |
172 | } | |
173 | ino = parsed[0]; | |
174 | mode = parsed[1]; | |
175 | uid = parsed[2]; | |
176 | gid = parsed[3]; | |
177 | nlink = parsed[4]; | |
889d51a1 | 178 | mtime = parsed[5]; |
1da177e4 LT |
179 | body_len = parsed[6]; |
180 | major = parsed[7]; | |
181 | minor = parsed[8]; | |
182 | rdev = new_encode_dev(MKDEV(parsed[9], parsed[10])); | |
183 | name_len = parsed[11]; | |
184 | } | |
185 | ||
186 | /* FSM */ | |
187 | ||
188 | static __initdata enum state { | |
189 | Start, | |
190 | Collect, | |
191 | GotHeader, | |
192 | SkipIt, | |
193 | GotName, | |
194 | CopyFile, | |
195 | GotSymlink, | |
196 | Reset | |
197 | } state, next_state; | |
198 | ||
199 | static __initdata char *victim; | |
200 | static __initdata unsigned count; | |
201 | static __initdata loff_t this_header, next_header; | |
202 | ||
b0a5ab93 | 203 | static inline void __init eat(unsigned n) |
1da177e4 LT |
204 | { |
205 | victim += n; | |
206 | this_header += n; | |
207 | count -= n; | |
208 | } | |
209 | ||
889d51a1 | 210 | static __initdata char *vcollected; |
1da177e4 LT |
211 | static __initdata char *collected; |
212 | static __initdata int remains; | |
213 | static __initdata char *collect; | |
214 | ||
215 | static void __init read_into(char *buf, unsigned size, enum state next) | |
216 | { | |
217 | if (count >= size) { | |
218 | collected = victim; | |
219 | eat(size); | |
220 | state = next; | |
221 | } else { | |
222 | collect = collected = buf; | |
223 | remains = size; | |
224 | next_state = next; | |
225 | state = Collect; | |
226 | } | |
227 | } | |
228 | ||
229 | static __initdata char *header_buf, *symlink_buf, *name_buf; | |
230 | ||
231 | static int __init do_start(void) | |
232 | { | |
233 | read_into(header_buf, 110, GotHeader); | |
234 | return 0; | |
235 | } | |
236 | ||
237 | static int __init do_collect(void) | |
238 | { | |
239 | unsigned n = remains; | |
240 | if (count < n) | |
241 | n = count; | |
242 | memcpy(collect, victim, n); | |
243 | eat(n); | |
244 | collect += n; | |
245 | if ((remains -= n) != 0) | |
246 | return 1; | |
247 | state = next_state; | |
248 | return 0; | |
249 | } | |
250 | ||
251 | static int __init do_header(void) | |
252 | { | |
2e591bbc AV |
253 | if (memcmp(collected, "070707", 6)==0) { |
254 | error("incorrect cpio method used: use -H newc option"); | |
255 | return 1; | |
256 | } | |
1da177e4 LT |
257 | if (memcmp(collected, "070701", 6)) { |
258 | error("no cpio magic"); | |
259 | return 1; | |
260 | } | |
261 | parse_header(collected); | |
262 | next_header = this_header + N_ALIGN(name_len) + body_len; | |
263 | next_header = (next_header + 3) & ~3; | |
1da177e4 LT |
264 | state = SkipIt; |
265 | if (name_len <= 0 || name_len > PATH_MAX) | |
266 | return 0; | |
267 | if (S_ISLNK(mode)) { | |
268 | if (body_len > PATH_MAX) | |
269 | return 0; | |
270 | collect = collected = symlink_buf; | |
271 | remains = N_ALIGN(name_len) + body_len; | |
272 | next_state = GotSymlink; | |
273 | state = Collect; | |
274 | return 0; | |
275 | } | |
276 | if (S_ISREG(mode) || !body_len) | |
277 | read_into(name_buf, N_ALIGN(name_len), GotName); | |
278 | return 0; | |
279 | } | |
280 | ||
281 | static int __init do_skip(void) | |
282 | { | |
283 | if (this_header + count < next_header) { | |
284 | eat(count); | |
285 | return 1; | |
286 | } else { | |
287 | eat(next_header - this_header); | |
288 | state = next_state; | |
289 | return 0; | |
290 | } | |
291 | } | |
292 | ||
293 | static int __init do_reset(void) | |
294 | { | |
295 | while(count && *victim == '\0') | |
296 | eat(1); | |
297 | if (count && (this_header & 3)) | |
298 | error("broken padding"); | |
299 | return 1; | |
300 | } | |
301 | ||
302 | static int __init maybe_link(void) | |
303 | { | |
304 | if (nlink >= 2) { | |
2139a7fb | 305 | char *old = find_link(major, minor, ino, mode, collected); |
1da177e4 LT |
306 | if (old) |
307 | return (sys_link(old, collected) < 0) ? -1 : 1; | |
308 | } | |
309 | return 0; | |
310 | } | |
311 | ||
685dd2d5 | 312 | static void __init clean_path(char *path, umode_t mode) |
2139a7fb PA |
313 | { |
314 | struct stat st; | |
315 | ||
316 | if (!sys_newlstat(path, &st) && (st.st_mode^mode) & S_IFMT) { | |
317 | if (S_ISDIR(st.st_mode)) | |
318 | sys_rmdir(path); | |
319 | else | |
320 | sys_unlink(path); | |
321 | } | |
322 | } | |
323 | ||
1da177e4 LT |
324 | static __initdata int wfd; |
325 | ||
326 | static int __init do_name(void) | |
327 | { | |
328 | state = SkipIt; | |
329 | next_state = Reset; | |
330 | if (strcmp(collected, "TRAILER!!!") == 0) { | |
331 | free_hash(); | |
332 | return 0; | |
333 | } | |
2139a7fb | 334 | clean_path(collected, mode); |
1da177e4 | 335 | if (S_ISREG(mode)) { |
2139a7fb PA |
336 | int ml = maybe_link(); |
337 | if (ml >= 0) { | |
338 | int openflags = O_WRONLY|O_CREAT; | |
339 | if (ml != 1) | |
340 | openflags |= O_TRUNC; | |
341 | wfd = sys_open(collected, openflags, mode); | |
342 | ||
1da177e4 LT |
343 | if (wfd >= 0) { |
344 | sys_fchown(wfd, uid, gid); | |
345 | sys_fchmod(wfd, mode); | |
d20d5a74 RR |
346 | if (body_len) |
347 | sys_ftruncate(wfd, body_len); | |
889d51a1 | 348 | vcollected = kstrdup(collected, GFP_KERNEL); |
1da177e4 LT |
349 | state = CopyFile; |
350 | } | |
351 | } | |
352 | } else if (S_ISDIR(mode)) { | |
353 | sys_mkdir(collected, mode); | |
354 | sys_chown(collected, uid, gid); | |
355 | sys_chmod(collected, mode); | |
889d51a1 | 356 | dir_add(collected, mtime); |
1da177e4 LT |
357 | } else if (S_ISBLK(mode) || S_ISCHR(mode) || |
358 | S_ISFIFO(mode) || S_ISSOCK(mode)) { | |
359 | if (maybe_link() == 0) { | |
360 | sys_mknod(collected, mode, rdev); | |
361 | sys_chown(collected, uid, gid); | |
362 | sys_chmod(collected, mode); | |
889d51a1 | 363 | do_utime(collected, mtime); |
1da177e4 LT |
364 | } |
365 | } | |
366 | return 0; | |
367 | } | |
368 | ||
369 | static int __init do_copy(void) | |
370 | { | |
371 | if (count >= body_len) { | |
38747439 | 372 | xwrite(wfd, victim, body_len); |
1da177e4 | 373 | sys_close(wfd); |
889d51a1 NL |
374 | do_utime(vcollected, mtime); |
375 | kfree(vcollected); | |
1da177e4 LT |
376 | eat(body_len); |
377 | state = SkipIt; | |
378 | return 0; | |
379 | } else { | |
38747439 | 380 | xwrite(wfd, victim, count); |
1da177e4 LT |
381 | body_len -= count; |
382 | eat(count); | |
383 | return 1; | |
384 | } | |
385 | } | |
386 | ||
387 | static int __init do_symlink(void) | |
388 | { | |
389 | collected[N_ALIGN(name_len) + body_len] = '\0'; | |
2139a7fb | 390 | clean_path(collected, 0); |
1da177e4 LT |
391 | sys_symlink(collected + N_ALIGN(name_len), collected); |
392 | sys_lchown(collected, uid, gid); | |
889d51a1 | 393 | do_utime(collected, mtime); |
1da177e4 LT |
394 | state = SkipIt; |
395 | next_state = Reset; | |
396 | return 0; | |
397 | } | |
398 | ||
399 | static __initdata int (*actions[])(void) = { | |
400 | [Start] = do_start, | |
401 | [Collect] = do_collect, | |
402 | [GotHeader] = do_header, | |
403 | [SkipIt] = do_skip, | |
404 | [GotName] = do_name, | |
405 | [CopyFile] = do_copy, | |
406 | [GotSymlink] = do_symlink, | |
407 | [Reset] = do_reset, | |
408 | }; | |
409 | ||
410 | static int __init write_buffer(char *buf, unsigned len) | |
411 | { | |
412 | count = len; | |
413 | victim = buf; | |
414 | ||
415 | while (!actions[state]()) | |
416 | ; | |
417 | return len - count; | |
418 | } | |
419 | ||
30d65dbf | 420 | static int __init flush_buffer(void *bufv, unsigned len) |
1da177e4 | 421 | { |
30d65dbf | 422 | char *buf = (char *) bufv; |
1da177e4 | 423 | int written; |
30d65dbf | 424 | int origLen = len; |
1da177e4 | 425 | if (message) |
30d65dbf | 426 | return -1; |
1da177e4 LT |
427 | while ((written = write_buffer(buf, len)) < len && !message) { |
428 | char c = buf[written]; | |
429 | if (c == '0') { | |
430 | buf += written; | |
431 | len -= written; | |
432 | state = Start; | |
433 | } else if (c == 0) { | |
434 | buf += written; | |
435 | len -= written; | |
436 | state = Reset; | |
437 | } else | |
438 | error("junk in compressed archive"); | |
439 | } | |
30d65dbf | 440 | return origLen; |
1da177e4 LT |
441 | } |
442 | ||
30d65dbf | 443 | static unsigned my_inptr; /* index of next byte to be processed in inbuf */ |
1da177e4 | 444 | |
889c92d2 | 445 | #include <linux/decompress/generic.h> |
1da177e4 | 446 | |
df52092f | 447 | static char * __init unpack_to_rootfs(char *buf, unsigned len) |
1da177e4 | 448 | { |
54291362 | 449 | int written, res; |
889c92d2 | 450 | decompress_fn decompress; |
23a22d57 PA |
451 | const char *compress_name; |
452 | static __initdata char msg_buf[64]; | |
889c92d2 | 453 | |
3265e66b TP |
454 | header_buf = kmalloc(110, GFP_KERNEL); |
455 | symlink_buf = kmalloc(PATH_MAX + N_ALIGN(PATH_MAX) + 1, GFP_KERNEL); | |
456 | name_buf = kmalloc(N_ALIGN(PATH_MAX), GFP_KERNEL); | |
30d65dbf AK |
457 | |
458 | if (!header_buf || !symlink_buf || !name_buf) | |
1da177e4 | 459 | panic("can't allocate buffers"); |
30d65dbf | 460 | |
1da177e4 LT |
461 | state = Start; |
462 | this_header = 0; | |
463 | message = NULL; | |
464 | while (!message && len) { | |
465 | loff_t saved_offset = this_header; | |
466 | if (*buf == '0' && !(this_header & 3)) { | |
467 | state = Start; | |
468 | written = write_buffer(buf, len); | |
469 | buf += written; | |
470 | len -= written; | |
471 | continue; | |
472 | } | |
473 | if (!*buf) { | |
474 | buf++; | |
475 | len--; | |
476 | this_header++; | |
477 | continue; | |
478 | } | |
479 | this_header = 0; | |
23a22d57 | 480 | decompress = decompress_method(buf, len, &compress_name); |
6aa7a29a | 481 | pr_debug("Detected %s compressed data\n", compress_name); |
54291362 PL |
482 | if (decompress) { |
483 | res = decompress(buf, len, NULL, flush_buffer, NULL, | |
889c92d2 | 484 | &my_inptr, error); |
54291362 PL |
485 | if (res) |
486 | error("decompressor failed"); | |
487 | } else if (compress_name) { | |
23a22d57 PA |
488 | if (!message) { |
489 | snprintf(msg_buf, sizeof msg_buf, | |
490 | "compression method %s not configured", | |
491 | compress_name); | |
492 | message = msg_buf; | |
493 | } | |
df37bd15 PL |
494 | } else |
495 | error("junk in compressed archive"); | |
1da177e4 | 496 | if (state != Reset) |
30d65dbf AK |
497 | error("junk in compressed archive"); |
498 | this_header = saved_offset + my_inptr; | |
499 | buf += my_inptr; | |
500 | len -= my_inptr; | |
1da177e4 | 501 | } |
889d51a1 | 502 | dir_utime(); |
3265e66b TP |
503 | kfree(name_buf); |
504 | kfree(symlink_buf); | |
505 | kfree(header_buf); | |
1da177e4 LT |
506 | return message; |
507 | } | |
508 | ||
0a7b35cb MN |
509 | static int __initdata do_retain_initrd; |
510 | ||
511 | static int __init retain_initrd_param(char *str) | |
512 | { | |
513 | if (*str) | |
514 | return 0; | |
515 | do_retain_initrd = 1; | |
516 | return 1; | |
517 | } | |
518 | __setup("retain_initrd", retain_initrd_param); | |
519 | ||
ffe8018c HB |
520 | extern char __initramfs_start[]; |
521 | extern unsigned long __initramfs_size; | |
1da177e4 | 522 | #include <linux/initrd.h> |
9c15e852 | 523 | #include <linux/kexec.h> |
0f3d2bd5 JB |
524 | |
525 | static void __init free_initrd(void) | |
526 | { | |
9c15e852 HM |
527 | #ifdef CONFIG_KEXEC |
528 | unsigned long crashk_start = (unsigned long)__va(crashk_res.start); | |
529 | unsigned long crashk_end = (unsigned long)__va(crashk_res.end); | |
0a7b35cb MN |
530 | #endif |
531 | if (do_retain_initrd) | |
532 | goto skip; | |
9c15e852 | 533 | |
0a7b35cb | 534 | #ifdef CONFIG_KEXEC |
9c15e852 HM |
535 | /* |
536 | * If the initrd region is overlapped with crashkernel reserved region, | |
537 | * free only memory that is not part of crashkernel region. | |
538 | */ | |
539 | if (initrd_start < crashk_end && initrd_end > crashk_start) { | |
540 | /* | |
541 | * Initialize initrd memory region since the kexec boot does | |
542 | * not do. | |
543 | */ | |
544 | memset((void *)initrd_start, 0, initrd_end - initrd_start); | |
545 | if (initrd_start < crashk_start) | |
546 | free_initrd_mem(initrd_start, crashk_start); | |
547 | if (initrd_end > crashk_end) | |
548 | free_initrd_mem(crashk_end, initrd_end); | |
549 | } else | |
550 | #endif | |
551 | free_initrd_mem(initrd_start, initrd_end); | |
0a7b35cb | 552 | skip: |
0f3d2bd5 JB |
553 | initrd_start = 0; |
554 | initrd_end = 0; | |
555 | } | |
556 | ||
b52bb371 | 557 | #ifdef CONFIG_BLK_DEV_RAM |
df52092f LS |
558 | #define BUF_SIZE 1024 |
559 | static void __init clean_rootfs(void) | |
560 | { | |
561 | int fd; | |
562 | void *buf; | |
563 | struct linux_dirent64 *dirp; | |
8aaed5be | 564 | int num; |
df52092f | 565 | |
c67e5382 | 566 | fd = sys_open("/", O_RDONLY, 0); |
df52092f LS |
567 | WARN_ON(fd < 0); |
568 | if (fd < 0) | |
569 | return; | |
570 | buf = kzalloc(BUF_SIZE, GFP_KERNEL); | |
571 | WARN_ON(!buf); | |
572 | if (!buf) { | |
573 | sys_close(fd); | |
574 | return; | |
575 | } | |
576 | ||
577 | dirp = buf; | |
8aaed5be HS |
578 | num = sys_getdents64(fd, dirp, BUF_SIZE); |
579 | while (num > 0) { | |
580 | while (num > 0) { | |
df52092f LS |
581 | struct stat st; |
582 | int ret; | |
583 | ||
584 | ret = sys_newlstat(dirp->d_name, &st); | |
585 | WARN_ON_ONCE(ret); | |
586 | if (!ret) { | |
587 | if (S_ISDIR(st.st_mode)) | |
588 | sys_rmdir(dirp->d_name); | |
589 | else | |
590 | sys_unlink(dirp->d_name); | |
591 | } | |
592 | ||
8aaed5be | 593 | num -= dirp->d_reclen; |
df52092f LS |
594 | dirp = (void *)dirp + dirp->d_reclen; |
595 | } | |
596 | dirp = buf; | |
597 | memset(buf, 0, BUF_SIZE); | |
8aaed5be | 598 | num = sys_getdents64(fd, dirp, BUF_SIZE); |
df52092f LS |
599 | } |
600 | ||
601 | sys_close(fd); | |
602 | kfree(buf); | |
603 | } | |
b52bb371 | 604 | #endif |
df52092f | 605 | |
9a9e0d68 | 606 | static int __init populate_rootfs(void) |
1da177e4 | 607 | { |
ffe8018c | 608 | char *err = unpack_to_rootfs(__initramfs_start, __initramfs_size); |
1da177e4 | 609 | if (err) |
499a4584 | 610 | panic("%s", err); /* Failed to decompress INTERNAL initramfs */ |
1da177e4 | 611 | if (initrd_start) { |
340e48e6 | 612 | #ifdef CONFIG_BLK_DEV_RAM |
1da177e4 | 613 | int fd; |
a1e6b6c1 | 614 | printk(KERN_INFO "Trying to unpack rootfs image as initramfs...\n"); |
1da177e4 | 615 | err = unpack_to_rootfs((char *)initrd_start, |
df52092f | 616 | initrd_end - initrd_start); |
1da177e4 | 617 | if (!err) { |
0f3d2bd5 | 618 | free_initrd(); |
bb813f4c | 619 | goto done; |
df52092f LS |
620 | } else { |
621 | clean_rootfs(); | |
ffe8018c | 622 | unpack_to_rootfs(__initramfs_start, __initramfs_size); |
1da177e4 | 623 | } |
c1c490e0 SK |
624 | printk(KERN_INFO "rootfs image is not initramfs (%s)" |
625 | "; looks like an initrd\n", err); | |
c67e5382 | 626 | fd = sys_open("/initrd.image", |
562f5e63 | 627 | O_WRONLY|O_CREAT, 0700); |
1da177e4 | 628 | if (fd >= 0) { |
38747439 YL |
629 | ssize_t written = xwrite(fd, (char *)initrd_start, |
630 | initrd_end - initrd_start); | |
631 | ||
632 | if (written != initrd_end - initrd_start) | |
633 | pr_err("/initrd.image: incomplete write (%zd != %ld)\n", | |
634 | written, initrd_end - initrd_start); | |
635 | ||
1da177e4 | 636 | sys_close(fd); |
0f3d2bd5 | 637 | free_initrd(); |
1da177e4 | 638 | } |
bb813f4c | 639 | done: |
340e48e6 | 640 | #else |
a1e6b6c1 | 641 | printk(KERN_INFO "Unpacking initramfs...\n"); |
340e48e6 | 642 | err = unpack_to_rootfs((char *)initrd_start, |
df52092f | 643 | initrd_end - initrd_start); |
a1e6b6c1 EP |
644 | if (err) |
645 | printk(KERN_EMERG "Initramfs unpacking failed: %s\n", err); | |
340e48e6 ZP |
646 | free_initrd(); |
647 | #endif | |
bb813f4c TH |
648 | /* |
649 | * Try loading default modules from initramfs. This gives | |
650 | * us a chance to load before device_initcalls. | |
651 | */ | |
652 | load_default_modules(); | |
1da177e4 | 653 | } |
8d610dd5 | 654 | return 0; |
1da177e4 | 655 | } |
8d610dd5 | 656 | rootfs_initcall(populate_rootfs); |