Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | #include <linux/init.h> |
3 | #include <linux/fs.h> | |
4 | #include <linux/slab.h> | |
5 | #include <linux/types.h> | |
6 | #include <linux/fcntl.h> | |
7 | #include <linux/delay.h> | |
8 | #include <linux/string.h> | |
df52092f | 9 | #include <linux/dirent.h> |
1da177e4 | 10 | #include <linux/syscalls.h> |
889d51a1 | 11 | #include <linux/utime.h> |
08865514 | 12 | #include <linux/file.h> |
1da177e4 | 13 | |
38747439 YL |
14 | static ssize_t __init xwrite(int fd, const char *p, size_t count) |
15 | { | |
16 | ssize_t out = 0; | |
17 | ||
18 | /* sys_write only can write MAX_RW_COUNT aka 2G-4K bytes at most */ | |
19 | while (count) { | |
e7a3e8b2 | 20 | ssize_t rv = ksys_write(fd, p, count); |
38747439 YL |
21 | |
22 | if (rv < 0) { | |
23 | if (rv == -EINTR || rv == -EAGAIN) | |
24 | continue; | |
25 | return out ? out : rv; | |
26 | } else if (rv == 0) | |
27 | break; | |
28 | ||
29 | p += rv; | |
30 | out += rv; | |
31 | count -= rv; | |
32 | } | |
33 | ||
34 | return out; | |
35 | } | |
36 | ||
1da177e4 LT |
37 | static __initdata char *message; |
38 | static void __init error(char *x) | |
39 | { | |
40 | if (!message) | |
41 | message = x; | |
42 | } | |
43 | ||
1da177e4 LT |
44 | /* link hash */ |
45 | ||
6a050da4 MH |
46 | #define N_ALIGN(len) ((((len) + 1) & ~3) + 2) |
47 | ||
1da177e4 LT |
48 | static __initdata struct hash { |
49 | int ino, minor, major; | |
685dd2d5 | 50 | umode_t mode; |
1da177e4 | 51 | struct hash *next; |
6a050da4 | 52 | char name[N_ALIGN(PATH_MAX)]; |
1da177e4 LT |
53 | } *head[32]; |
54 | ||
55 | static inline int hash(int major, int minor, int ino) | |
56 | { | |
57 | unsigned long tmp = ino + minor + (major << 3); | |
58 | tmp += tmp >> 5; | |
59 | return tmp & 31; | |
60 | } | |
61 | ||
2139a7fb | 62 | static char __init *find_link(int major, int minor, int ino, |
685dd2d5 | 63 | umode_t mode, char *name) |
1da177e4 LT |
64 | { |
65 | struct hash **p, *q; | |
66 | for (p = head + hash(major, minor, ino); *p; p = &(*p)->next) { | |
67 | if ((*p)->ino != ino) | |
68 | continue; | |
69 | if ((*p)->minor != minor) | |
70 | continue; | |
71 | if ((*p)->major != major) | |
72 | continue; | |
2139a7fb PA |
73 | if (((*p)->mode ^ mode) & S_IFMT) |
74 | continue; | |
1da177e4 LT |
75 | return (*p)->name; |
76 | } | |
3265e66b | 77 | q = kmalloc(sizeof(struct hash), GFP_KERNEL); |
1da177e4 LT |
78 | if (!q) |
79 | panic("can't allocate link hash entry"); | |
1da177e4 | 80 | q->major = major; |
2139a7fb PA |
81 | q->minor = minor; |
82 | q->ino = ino; | |
83 | q->mode = mode; | |
6a050da4 | 84 | strcpy(q->name, name); |
1da177e4 LT |
85 | q->next = NULL; |
86 | *p = q; | |
87 | return NULL; | |
88 | } | |
89 | ||
90 | static void __init free_hash(void) | |
91 | { | |
92 | struct hash **p, *q; | |
93 | for (p = head; p < head + 32; p++) { | |
94 | while (*p) { | |
95 | q = *p; | |
96 | *p = q->next; | |
3265e66b | 97 | kfree(q); |
1da177e4 LT |
98 | } |
99 | } | |
100 | } | |
101 | ||
e35c4c64 | 102 | static long __init do_utime(char *filename, time64_t mtime) |
889d51a1 | 103 | { |
aaed2dd8 | 104 | struct timespec64 t[2]; |
889d51a1 NL |
105 | |
106 | t[0].tv_sec = mtime; | |
107 | t[0].tv_nsec = 0; | |
108 | t[1].tv_sec = mtime; | |
109 | t[1].tv_nsec = 0; | |
110 | ||
111 | return do_utimes(AT_FDCWD, filename, t, AT_SYMLINK_NOFOLLOW); | |
112 | } | |
113 | ||
114 | static __initdata LIST_HEAD(dir_list); | |
115 | struct dir_entry { | |
116 | struct list_head list; | |
117 | char *name; | |
e35c4c64 | 118 | time64_t mtime; |
889d51a1 NL |
119 | }; |
120 | ||
e35c4c64 | 121 | static void __init dir_add(const char *name, time64_t mtime) |
889d51a1 NL |
122 | { |
123 | struct dir_entry *de = kmalloc(sizeof(struct dir_entry), GFP_KERNEL); | |
124 | if (!de) | |
125 | panic("can't allocate dir_entry buffer"); | |
126 | INIT_LIST_HEAD(&de->list); | |
127 | de->name = kstrdup(name, GFP_KERNEL); | |
128 | de->mtime = mtime; | |
129 | list_add(&de->list, &dir_list); | |
130 | } | |
131 | ||
132 | static void __init dir_utime(void) | |
133 | { | |
134 | struct dir_entry *de, *tmp; | |
135 | list_for_each_entry_safe(de, tmp, &dir_list, list) { | |
136 | list_del(&de->list); | |
137 | do_utime(de->name, de->mtime); | |
138 | kfree(de->name); | |
139 | kfree(de); | |
140 | } | |
141 | } | |
142 | ||
e35c4c64 | 143 | static __initdata time64_t mtime; |
889d51a1 | 144 | |
1da177e4 LT |
145 | /* cpio header parsing */ |
146 | ||
147 | static __initdata unsigned long ino, major, minor, nlink; | |
685dd2d5 | 148 | static __initdata umode_t mode; |
1da177e4 LT |
149 | static __initdata unsigned long body_len, name_len; |
150 | static __initdata uid_t uid; | |
151 | static __initdata gid_t gid; | |
152 | static __initdata unsigned rdev; | |
153 | ||
154 | static void __init parse_header(char *s) | |
155 | { | |
156 | unsigned long parsed[12]; | |
157 | char buf[9]; | |
158 | int i; | |
159 | ||
160 | buf[8] = '\0'; | |
161 | for (i = 0, s += 6; i < 12; i++, s += 8) { | |
162 | memcpy(buf, s, 8); | |
163 | parsed[i] = simple_strtoul(buf, NULL, 16); | |
164 | } | |
165 | ino = parsed[0]; | |
166 | mode = parsed[1]; | |
167 | uid = parsed[2]; | |
168 | gid = parsed[3]; | |
169 | nlink = parsed[4]; | |
e35c4c64 | 170 | mtime = parsed[5]; /* breaks in y2106 */ |
1da177e4 LT |
171 | body_len = parsed[6]; |
172 | major = parsed[7]; | |
173 | minor = parsed[8]; | |
174 | rdev = new_encode_dev(MKDEV(parsed[9], parsed[10])); | |
175 | name_len = parsed[11]; | |
176 | } | |
177 | ||
178 | /* FSM */ | |
179 | ||
180 | static __initdata enum state { | |
181 | Start, | |
182 | Collect, | |
183 | GotHeader, | |
184 | SkipIt, | |
185 | GotName, | |
186 | CopyFile, | |
187 | GotSymlink, | |
188 | Reset | |
189 | } state, next_state; | |
190 | ||
191 | static __initdata char *victim; | |
c34d85ac | 192 | static unsigned long byte_count __initdata; |
1da177e4 LT |
193 | static __initdata loff_t this_header, next_header; |
194 | ||
b0a5ab93 | 195 | static inline void __init eat(unsigned n) |
1da177e4 LT |
196 | { |
197 | victim += n; | |
198 | this_header += n; | |
c34d85ac | 199 | byte_count -= n; |
1da177e4 LT |
200 | } |
201 | ||
889d51a1 | 202 | static __initdata char *vcollected; |
1da177e4 | 203 | static __initdata char *collected; |
d97b07c5 | 204 | static long remains __initdata; |
1da177e4 LT |
205 | static __initdata char *collect; |
206 | ||
207 | static void __init read_into(char *buf, unsigned size, enum state next) | |
208 | { | |
c34d85ac | 209 | if (byte_count >= size) { |
1da177e4 LT |
210 | collected = victim; |
211 | eat(size); | |
212 | state = next; | |
213 | } else { | |
214 | collect = collected = buf; | |
215 | remains = size; | |
216 | next_state = next; | |
217 | state = Collect; | |
218 | } | |
219 | } | |
220 | ||
221 | static __initdata char *header_buf, *symlink_buf, *name_buf; | |
222 | ||
223 | static int __init do_start(void) | |
224 | { | |
225 | read_into(header_buf, 110, GotHeader); | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static int __init do_collect(void) | |
230 | { | |
d97b07c5 | 231 | unsigned long n = remains; |
c34d85ac MR |
232 | if (byte_count < n) |
233 | n = byte_count; | |
1da177e4 LT |
234 | memcpy(collect, victim, n); |
235 | eat(n); | |
236 | collect += n; | |
237 | if ((remains -= n) != 0) | |
238 | return 1; | |
239 | state = next_state; | |
240 | return 0; | |
241 | } | |
242 | ||
243 | static int __init do_header(void) | |
244 | { | |
2e591bbc AV |
245 | if (memcmp(collected, "070707", 6)==0) { |
246 | error("incorrect cpio method used: use -H newc option"); | |
247 | return 1; | |
248 | } | |
1da177e4 LT |
249 | if (memcmp(collected, "070701", 6)) { |
250 | error("no cpio magic"); | |
251 | return 1; | |
252 | } | |
253 | parse_header(collected); | |
254 | next_header = this_header + N_ALIGN(name_len) + body_len; | |
255 | next_header = (next_header + 3) & ~3; | |
1da177e4 LT |
256 | state = SkipIt; |
257 | if (name_len <= 0 || name_len > PATH_MAX) | |
258 | return 0; | |
259 | if (S_ISLNK(mode)) { | |
260 | if (body_len > PATH_MAX) | |
261 | return 0; | |
262 | collect = collected = symlink_buf; | |
263 | remains = N_ALIGN(name_len) + body_len; | |
264 | next_state = GotSymlink; | |
265 | state = Collect; | |
266 | return 0; | |
267 | } | |
268 | if (S_ISREG(mode) || !body_len) | |
269 | read_into(name_buf, N_ALIGN(name_len), GotName); | |
270 | return 0; | |
271 | } | |
272 | ||
273 | static int __init do_skip(void) | |
274 | { | |
c34d85ac MR |
275 | if (this_header + byte_count < next_header) { |
276 | eat(byte_count); | |
1da177e4 LT |
277 | return 1; |
278 | } else { | |
279 | eat(next_header - this_header); | |
280 | state = next_state; | |
281 | return 0; | |
282 | } | |
283 | } | |
284 | ||
285 | static int __init do_reset(void) | |
286 | { | |
c34d85ac | 287 | while (byte_count && *victim == '\0') |
1da177e4 | 288 | eat(1); |
c34d85ac | 289 | if (byte_count && (this_header & 3)) |
1da177e4 LT |
290 | error("broken padding"); |
291 | return 1; | |
292 | } | |
293 | ||
294 | static int __init maybe_link(void) | |
295 | { | |
296 | if (nlink >= 2) { | |
2139a7fb | 297 | char *old = find_link(major, minor, ino, mode, collected); |
1da177e4 | 298 | if (old) |
46ea89eb | 299 | return (ksys_link(old, collected) < 0) ? -1 : 1; |
1da177e4 LT |
300 | } |
301 | return 0; | |
302 | } | |
303 | ||
c34d85ac | 304 | static void __init clean_path(char *path, umode_t fmode) |
2139a7fb | 305 | { |
046aa126 | 306 | struct kstat st; |
2139a7fb | 307 | |
046aa126 AB |
308 | if (!vfs_lstat(path, &st) && (st.mode ^ fmode) & S_IFMT) { |
309 | if (S_ISDIR(st.mode)) | |
f459dffa | 310 | ksys_rmdir(path); |
2139a7fb | 311 | else |
0f32ab8c | 312 | ksys_unlink(path); |
2139a7fb PA |
313 | } |
314 | } | |
315 | ||
1da177e4 LT |
316 | static __initdata int wfd; |
317 | ||
318 | static int __init do_name(void) | |
319 | { | |
320 | state = SkipIt; | |
321 | next_state = Reset; | |
322 | if (strcmp(collected, "TRAILER!!!") == 0) { | |
323 | free_hash(); | |
324 | return 0; | |
325 | } | |
2139a7fb | 326 | clean_path(collected, mode); |
1da177e4 | 327 | if (S_ISREG(mode)) { |
2139a7fb PA |
328 | int ml = maybe_link(); |
329 | if (ml >= 0) { | |
330 | int openflags = O_WRONLY|O_CREAT; | |
331 | if (ml != 1) | |
332 | openflags |= O_TRUNC; | |
bae217ea | 333 | wfd = ksys_open(collected, openflags, mode); |
2139a7fb | 334 | |
1da177e4 | 335 | if (wfd >= 0) { |
55731b3c | 336 | ksys_fchown(wfd, uid, gid); |
03450e27 | 337 | ksys_fchmod(wfd, mode); |
d20d5a74 | 338 | if (body_len) |
411d9475 | 339 | ksys_ftruncate(wfd, body_len); |
889d51a1 | 340 | vcollected = kstrdup(collected, GFP_KERNEL); |
1da177e4 LT |
341 | state = CopyFile; |
342 | } | |
343 | } | |
344 | } else if (S_ISDIR(mode)) { | |
0101db7a | 345 | ksys_mkdir(collected, mode); |
55731b3c | 346 | ksys_chown(collected, uid, gid); |
03450e27 | 347 | ksys_chmod(collected, mode); |
889d51a1 | 348 | dir_add(collected, mtime); |
1da177e4 LT |
349 | } else if (S_ISBLK(mode) || S_ISCHR(mode) || |
350 | S_ISFIFO(mode) || S_ISSOCK(mode)) { | |
351 | if (maybe_link() == 0) { | |
87c4e192 | 352 | ksys_mknod(collected, mode, rdev); |
55731b3c | 353 | ksys_chown(collected, uid, gid); |
03450e27 | 354 | ksys_chmod(collected, mode); |
889d51a1 | 355 | do_utime(collected, mtime); |
1da177e4 LT |
356 | } |
357 | } | |
358 | return 0; | |
359 | } | |
360 | ||
361 | static int __init do_copy(void) | |
362 | { | |
c34d85ac | 363 | if (byte_count >= body_len) { |
9687fd91 DE |
364 | if (xwrite(wfd, victim, body_len) != body_len) |
365 | error("write error"); | |
2ca2a09d | 366 | ksys_close(wfd); |
889d51a1 NL |
367 | do_utime(vcollected, mtime); |
368 | kfree(vcollected); | |
1da177e4 LT |
369 | eat(body_len); |
370 | state = SkipIt; | |
371 | return 0; | |
372 | } else { | |
c34d85ac | 373 | if (xwrite(wfd, victim, byte_count) != byte_count) |
9687fd91 | 374 | error("write error"); |
c34d85ac MR |
375 | body_len -= byte_count; |
376 | eat(byte_count); | |
1da177e4 LT |
377 | return 1; |
378 | } | |
379 | } | |
380 | ||
381 | static int __init do_symlink(void) | |
382 | { | |
383 | collected[N_ALIGN(name_len) + body_len] = '\0'; | |
2139a7fb | 384 | clean_path(collected, 0); |
b724e846 | 385 | ksys_symlink(collected + N_ALIGN(name_len), collected); |
55731b3c | 386 | ksys_lchown(collected, uid, gid); |
889d51a1 | 387 | do_utime(collected, mtime); |
1da177e4 LT |
388 | state = SkipIt; |
389 | next_state = Reset; | |
390 | return 0; | |
391 | } | |
392 | ||
393 | static __initdata int (*actions[])(void) = { | |
394 | [Start] = do_start, | |
395 | [Collect] = do_collect, | |
396 | [GotHeader] = do_header, | |
397 | [SkipIt] = do_skip, | |
398 | [GotName] = do_name, | |
399 | [CopyFile] = do_copy, | |
400 | [GotSymlink] = do_symlink, | |
401 | [Reset] = do_reset, | |
402 | }; | |
403 | ||
d97b07c5 | 404 | static long __init write_buffer(char *buf, unsigned long len) |
1da177e4 | 405 | { |
c34d85ac | 406 | byte_count = len; |
1da177e4 LT |
407 | victim = buf; |
408 | ||
409 | while (!actions[state]()) | |
410 | ; | |
c34d85ac | 411 | return len - byte_count; |
1da177e4 LT |
412 | } |
413 | ||
d97b07c5 | 414 | static long __init flush_buffer(void *bufv, unsigned long len) |
1da177e4 | 415 | { |
30d65dbf | 416 | char *buf = (char *) bufv; |
d97b07c5 YL |
417 | long written; |
418 | long origLen = len; | |
1da177e4 | 419 | if (message) |
30d65dbf | 420 | return -1; |
1da177e4 LT |
421 | while ((written = write_buffer(buf, len)) < len && !message) { |
422 | char c = buf[written]; | |
423 | if (c == '0') { | |
424 | buf += written; | |
425 | len -= written; | |
426 | state = Start; | |
427 | } else if (c == 0) { | |
428 | buf += written; | |
429 | len -= written; | |
430 | state = Reset; | |
431 | } else | |
432 | error("junk in compressed archive"); | |
433 | } | |
30d65dbf | 434 | return origLen; |
1da177e4 LT |
435 | } |
436 | ||
d97b07c5 | 437 | static unsigned long my_inptr; /* index of next byte to be processed in inbuf */ |
1da177e4 | 438 | |
889c92d2 | 439 | #include <linux/decompress/generic.h> |
1da177e4 | 440 | |
d97b07c5 | 441 | static char * __init unpack_to_rootfs(char *buf, unsigned long len) |
1da177e4 | 442 | { |
d97b07c5 | 443 | long written; |
889c92d2 | 444 | decompress_fn decompress; |
23a22d57 PA |
445 | const char *compress_name; |
446 | static __initdata char msg_buf[64]; | |
889c92d2 | 447 | |
3265e66b TP |
448 | header_buf = kmalloc(110, GFP_KERNEL); |
449 | symlink_buf = kmalloc(PATH_MAX + N_ALIGN(PATH_MAX) + 1, GFP_KERNEL); | |
450 | name_buf = kmalloc(N_ALIGN(PATH_MAX), GFP_KERNEL); | |
30d65dbf AK |
451 | |
452 | if (!header_buf || !symlink_buf || !name_buf) | |
1da177e4 | 453 | panic("can't allocate buffers"); |
30d65dbf | 454 | |
1da177e4 LT |
455 | state = Start; |
456 | this_header = 0; | |
457 | message = NULL; | |
458 | while (!message && len) { | |
459 | loff_t saved_offset = this_header; | |
460 | if (*buf == '0' && !(this_header & 3)) { | |
461 | state = Start; | |
462 | written = write_buffer(buf, len); | |
463 | buf += written; | |
464 | len -= written; | |
465 | continue; | |
466 | } | |
467 | if (!*buf) { | |
468 | buf++; | |
469 | len--; | |
470 | this_header++; | |
471 | continue; | |
472 | } | |
473 | this_header = 0; | |
23a22d57 | 474 | decompress = decompress_method(buf, len, &compress_name); |
6aa7a29a | 475 | pr_debug("Detected %s compressed data\n", compress_name); |
54291362 | 476 | if (decompress) { |
d97b07c5 | 477 | int res = decompress(buf, len, NULL, flush_buffer, NULL, |
889c92d2 | 478 | &my_inptr, error); |
54291362 PL |
479 | if (res) |
480 | error("decompressor failed"); | |
481 | } else if (compress_name) { | |
23a22d57 PA |
482 | if (!message) { |
483 | snprintf(msg_buf, sizeof msg_buf, | |
484 | "compression method %s not configured", | |
485 | compress_name); | |
486 | message = msg_buf; | |
487 | } | |
df37bd15 PL |
488 | } else |
489 | error("junk in compressed archive"); | |
1da177e4 | 490 | if (state != Reset) |
30d65dbf AK |
491 | error("junk in compressed archive"); |
492 | this_header = saved_offset + my_inptr; | |
493 | buf += my_inptr; | |
494 | len -= my_inptr; | |
1da177e4 | 495 | } |
889d51a1 | 496 | dir_utime(); |
3265e66b TP |
497 | kfree(name_buf); |
498 | kfree(symlink_buf); | |
499 | kfree(header_buf); | |
1da177e4 LT |
500 | return message; |
501 | } | |
502 | ||
0a7b35cb MN |
503 | static int __initdata do_retain_initrd; |
504 | ||
505 | static int __init retain_initrd_param(char *str) | |
506 | { | |
507 | if (*str) | |
508 | return 0; | |
509 | do_retain_initrd = 1; | |
510 | return 1; | |
511 | } | |
512 | __setup("retain_initrd", retain_initrd_param); | |
513 | ||
ffe8018c HB |
514 | extern char __initramfs_start[]; |
515 | extern unsigned long __initramfs_size; | |
1da177e4 | 516 | #include <linux/initrd.h> |
9c15e852 | 517 | #include <linux/kexec.h> |
0f3d2bd5 JB |
518 | |
519 | static void __init free_initrd(void) | |
520 | { | |
2965faa5 | 521 | #ifdef CONFIG_KEXEC_CORE |
9c15e852 HM |
522 | unsigned long crashk_start = (unsigned long)__va(crashk_res.start); |
523 | unsigned long crashk_end = (unsigned long)__va(crashk_res.end); | |
0a7b35cb MN |
524 | #endif |
525 | if (do_retain_initrd) | |
526 | goto skip; | |
9c15e852 | 527 | |
2965faa5 | 528 | #ifdef CONFIG_KEXEC_CORE |
9c15e852 HM |
529 | /* |
530 | * If the initrd region is overlapped with crashkernel reserved region, | |
531 | * free only memory that is not part of crashkernel region. | |
532 | */ | |
533 | if (initrd_start < crashk_end && initrd_end > crashk_start) { | |
534 | /* | |
535 | * Initialize initrd memory region since the kexec boot does | |
536 | * not do. | |
537 | */ | |
538 | memset((void *)initrd_start, 0, initrd_end - initrd_start); | |
539 | if (initrd_start < crashk_start) | |
540 | free_initrd_mem(initrd_start, crashk_start); | |
541 | if (initrd_end > crashk_end) | |
542 | free_initrd_mem(crashk_end, initrd_end); | |
543 | } else | |
544 | #endif | |
545 | free_initrd_mem(initrd_start, initrd_end); | |
0a7b35cb | 546 | skip: |
0f3d2bd5 JB |
547 | initrd_start = 0; |
548 | initrd_end = 0; | |
549 | } | |
550 | ||
b52bb371 | 551 | #ifdef CONFIG_BLK_DEV_RAM |
df52092f LS |
552 | #define BUF_SIZE 1024 |
553 | static void __init clean_rootfs(void) | |
554 | { | |
555 | int fd; | |
556 | void *buf; | |
557 | struct linux_dirent64 *dirp; | |
8aaed5be | 558 | int num; |
df52092f | 559 | |
bae217ea | 560 | fd = ksys_open("/", O_RDONLY, 0); |
df52092f LS |
561 | WARN_ON(fd < 0); |
562 | if (fd < 0) | |
563 | return; | |
564 | buf = kzalloc(BUF_SIZE, GFP_KERNEL); | |
565 | WARN_ON(!buf); | |
566 | if (!buf) { | |
2ca2a09d | 567 | ksys_close(fd); |
df52092f LS |
568 | return; |
569 | } | |
570 | ||
571 | dirp = buf; | |
454dab3f | 572 | num = ksys_getdents64(fd, dirp, BUF_SIZE); |
8aaed5be HS |
573 | while (num > 0) { |
574 | while (num > 0) { | |
046aa126 | 575 | struct kstat st; |
df52092f LS |
576 | int ret; |
577 | ||
046aa126 | 578 | ret = vfs_lstat(dirp->d_name, &st); |
df52092f LS |
579 | WARN_ON_ONCE(ret); |
580 | if (!ret) { | |
046aa126 | 581 | if (S_ISDIR(st.mode)) |
f459dffa | 582 | ksys_rmdir(dirp->d_name); |
df52092f | 583 | else |
0f32ab8c | 584 | ksys_unlink(dirp->d_name); |
df52092f LS |
585 | } |
586 | ||
8aaed5be | 587 | num -= dirp->d_reclen; |
df52092f LS |
588 | dirp = (void *)dirp + dirp->d_reclen; |
589 | } | |
590 | dirp = buf; | |
591 | memset(buf, 0, BUF_SIZE); | |
454dab3f | 592 | num = ksys_getdents64(fd, dirp, BUF_SIZE); |
df52092f LS |
593 | } |
594 | ||
2ca2a09d | 595 | ksys_close(fd); |
df52092f LS |
596 | kfree(buf); |
597 | } | |
b52bb371 | 598 | #endif |
df52092f | 599 | |
9a9e0d68 | 600 | static int __init populate_rootfs(void) |
1da177e4 | 601 | { |
17a9be31 | 602 | /* Load the built in initramfs */ |
ffe8018c | 603 | char *err = unpack_to_rootfs(__initramfs_start, __initramfs_size); |
1da177e4 | 604 | if (err) |
499a4584 | 605 | panic("%s", err); /* Failed to decompress INTERNAL initramfs */ |
17a9be31 | 606 | /* If available load the bootloader supplied initrd */ |
cff75e0b | 607 | if (initrd_start && !IS_ENABLED(CONFIG_INITRAMFS_FORCE)) { |
340e48e6 | 608 | #ifdef CONFIG_BLK_DEV_RAM |
1da177e4 | 609 | int fd; |
a1e6b6c1 | 610 | printk(KERN_INFO "Trying to unpack rootfs image as initramfs...\n"); |
1da177e4 | 611 | err = unpack_to_rootfs((char *)initrd_start, |
df52092f | 612 | initrd_end - initrd_start); |
1da177e4 | 613 | if (!err) { |
0f3d2bd5 | 614 | free_initrd(); |
bb813f4c | 615 | goto done; |
df52092f LS |
616 | } else { |
617 | clean_rootfs(); | |
ffe8018c | 618 | unpack_to_rootfs(__initramfs_start, __initramfs_size); |
1da177e4 | 619 | } |
c1c490e0 SK |
620 | printk(KERN_INFO "rootfs image is not initramfs (%s)" |
621 | "; looks like an initrd\n", err); | |
bae217ea | 622 | fd = ksys_open("/initrd.image", |
562f5e63 | 623 | O_WRONLY|O_CREAT, 0700); |
1da177e4 | 624 | if (fd >= 0) { |
38747439 YL |
625 | ssize_t written = xwrite(fd, (char *)initrd_start, |
626 | initrd_end - initrd_start); | |
627 | ||
628 | if (written != initrd_end - initrd_start) | |
629 | pr_err("/initrd.image: incomplete write (%zd != %ld)\n", | |
630 | written, initrd_end - initrd_start); | |
631 | ||
2ca2a09d | 632 | ksys_close(fd); |
0f3d2bd5 | 633 | free_initrd(); |
1da177e4 | 634 | } |
bb813f4c | 635 | done: |
394e4f5d | 636 | /* empty statement */; |
340e48e6 | 637 | #else |
a1e6b6c1 | 638 | printk(KERN_INFO "Unpacking initramfs...\n"); |
340e48e6 | 639 | err = unpack_to_rootfs((char *)initrd_start, |
df52092f | 640 | initrd_end - initrd_start); |
a1e6b6c1 EP |
641 | if (err) |
642 | printk(KERN_EMERG "Initramfs unpacking failed: %s\n", err); | |
340e48e6 ZP |
643 | free_initrd(); |
644 | #endif | |
1da177e4 | 645 | } |
17a9be31 SH |
646 | flush_delayed_fput(); |
647 | /* | |
648 | * Try loading default modules from initramfs. This gives | |
649 | * us a chance to load before device_initcalls. | |
650 | */ | |
651 | load_default_modules(); | |
652 | ||
8d610dd5 | 653 | return 0; |
1da177e4 | 654 | } |
8d610dd5 | 655 | rootfs_initcall(populate_rootfs); |