]>
Commit | Line | Data |
---|---|---|
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 | ||
c34d85ac | 294 | static void __init clean_path(char *path, umode_t fmode) |
2139a7fb | 295 | { |
046aa126 | 296 | struct kstat st; |
2139a7fb | 297 | |
046aa126 AB |
298 | if (!vfs_lstat(path, &st) && (st.mode ^ fmode) & S_IFMT) { |
299 | if (S_ISDIR(st.mode)) | |
f459dffa | 300 | ksys_rmdir(path); |
2139a7fb | 301 | else |
0f32ab8c | 302 | ksys_unlink(path); |
2139a7fb PA |
303 | } |
304 | } | |
305 | ||
7c0950d4 LZ |
306 | static int __init maybe_link(void) |
307 | { | |
308 | if (nlink >= 2) { | |
309 | char *old = find_link(major, minor, ino, mode, collected); | |
310 | if (old) { | |
311 | clean_path(collected, 0); | |
312 | return (ksys_link(old, collected) < 0) ? -1 : 1; | |
313 | } | |
314 | } | |
315 | return 0; | |
316 | } | |
317 | ||
1da177e4 LT |
318 | static __initdata int wfd; |
319 | ||
320 | static int __init do_name(void) | |
321 | { | |
322 | state = SkipIt; | |
323 | next_state = Reset; | |
324 | if (strcmp(collected, "TRAILER!!!") == 0) { | |
325 | free_hash(); | |
326 | return 0; | |
327 | } | |
2139a7fb | 328 | clean_path(collected, mode); |
1da177e4 | 329 | if (S_ISREG(mode)) { |
2139a7fb PA |
330 | int ml = maybe_link(); |
331 | if (ml >= 0) { | |
332 | int openflags = O_WRONLY|O_CREAT; | |
333 | if (ml != 1) | |
334 | openflags |= O_TRUNC; | |
bae217ea | 335 | wfd = ksys_open(collected, openflags, mode); |
2139a7fb | 336 | |
1da177e4 | 337 | if (wfd >= 0) { |
55731b3c | 338 | ksys_fchown(wfd, uid, gid); |
03450e27 | 339 | ksys_fchmod(wfd, mode); |
d20d5a74 | 340 | if (body_len) |
411d9475 | 341 | ksys_ftruncate(wfd, body_len); |
889d51a1 | 342 | vcollected = kstrdup(collected, GFP_KERNEL); |
1da177e4 LT |
343 | state = CopyFile; |
344 | } | |
345 | } | |
346 | } else if (S_ISDIR(mode)) { | |
0101db7a | 347 | ksys_mkdir(collected, mode); |
55731b3c | 348 | ksys_chown(collected, uid, gid); |
03450e27 | 349 | ksys_chmod(collected, mode); |
889d51a1 | 350 | dir_add(collected, mtime); |
1da177e4 LT |
351 | } else if (S_ISBLK(mode) || S_ISCHR(mode) || |
352 | S_ISFIFO(mode) || S_ISSOCK(mode)) { | |
353 | if (maybe_link() == 0) { | |
87c4e192 | 354 | ksys_mknod(collected, mode, rdev); |
55731b3c | 355 | ksys_chown(collected, uid, gid); |
03450e27 | 356 | ksys_chmod(collected, mode); |
889d51a1 | 357 | do_utime(collected, mtime); |
1da177e4 LT |
358 | } |
359 | } | |
360 | return 0; | |
361 | } | |
362 | ||
363 | static int __init do_copy(void) | |
364 | { | |
c34d85ac | 365 | if (byte_count >= body_len) { |
9687fd91 DE |
366 | if (xwrite(wfd, victim, body_len) != body_len) |
367 | error("write error"); | |
2ca2a09d | 368 | ksys_close(wfd); |
889d51a1 NL |
369 | do_utime(vcollected, mtime); |
370 | kfree(vcollected); | |
1da177e4 LT |
371 | eat(body_len); |
372 | state = SkipIt; | |
373 | return 0; | |
374 | } else { | |
c34d85ac | 375 | if (xwrite(wfd, victim, byte_count) != byte_count) |
9687fd91 | 376 | error("write error"); |
c34d85ac MR |
377 | body_len -= byte_count; |
378 | eat(byte_count); | |
1da177e4 LT |
379 | return 1; |
380 | } | |
381 | } | |
382 | ||
383 | static int __init do_symlink(void) | |
384 | { | |
385 | collected[N_ALIGN(name_len) + body_len] = '\0'; | |
2139a7fb | 386 | clean_path(collected, 0); |
b724e846 | 387 | ksys_symlink(collected + N_ALIGN(name_len), collected); |
55731b3c | 388 | ksys_lchown(collected, uid, gid); |
889d51a1 | 389 | do_utime(collected, mtime); |
1da177e4 LT |
390 | state = SkipIt; |
391 | next_state = Reset; | |
392 | return 0; | |
393 | } | |
394 | ||
395 | static __initdata int (*actions[])(void) = { | |
396 | [Start] = do_start, | |
397 | [Collect] = do_collect, | |
398 | [GotHeader] = do_header, | |
399 | [SkipIt] = do_skip, | |
400 | [GotName] = do_name, | |
401 | [CopyFile] = do_copy, | |
402 | [GotSymlink] = do_symlink, | |
403 | [Reset] = do_reset, | |
404 | }; | |
405 | ||
d97b07c5 | 406 | static long __init write_buffer(char *buf, unsigned long len) |
1da177e4 | 407 | { |
c34d85ac | 408 | byte_count = len; |
1da177e4 LT |
409 | victim = buf; |
410 | ||
411 | while (!actions[state]()) | |
412 | ; | |
c34d85ac | 413 | return len - byte_count; |
1da177e4 LT |
414 | } |
415 | ||
d97b07c5 | 416 | static long __init flush_buffer(void *bufv, unsigned long len) |
1da177e4 | 417 | { |
30d65dbf | 418 | char *buf = (char *) bufv; |
d97b07c5 YL |
419 | long written; |
420 | long origLen = len; | |
1da177e4 | 421 | if (message) |
30d65dbf | 422 | return -1; |
1da177e4 LT |
423 | while ((written = write_buffer(buf, len)) < len && !message) { |
424 | char c = buf[written]; | |
425 | if (c == '0') { | |
426 | buf += written; | |
427 | len -= written; | |
428 | state = Start; | |
429 | } else if (c == 0) { | |
430 | buf += written; | |
431 | len -= written; | |
432 | state = Reset; | |
433 | } else | |
e5eed351 | 434 | error("junk within compressed archive"); |
1da177e4 | 435 | } |
30d65dbf | 436 | return origLen; |
1da177e4 LT |
437 | } |
438 | ||
d97b07c5 | 439 | static unsigned long my_inptr; /* index of next byte to be processed in inbuf */ |
1da177e4 | 440 | |
889c92d2 | 441 | #include <linux/decompress/generic.h> |
1da177e4 | 442 | |
d97b07c5 | 443 | static char * __init unpack_to_rootfs(char *buf, unsigned long len) |
1da177e4 | 444 | { |
d97b07c5 | 445 | long written; |
889c92d2 | 446 | decompress_fn decompress; |
23a22d57 PA |
447 | const char *compress_name; |
448 | static __initdata char msg_buf[64]; | |
889c92d2 | 449 | |
3265e66b TP |
450 | header_buf = kmalloc(110, GFP_KERNEL); |
451 | symlink_buf = kmalloc(PATH_MAX + N_ALIGN(PATH_MAX) + 1, GFP_KERNEL); | |
452 | name_buf = kmalloc(N_ALIGN(PATH_MAX), GFP_KERNEL); | |
30d65dbf AK |
453 | |
454 | if (!header_buf || !symlink_buf || !name_buf) | |
1da177e4 | 455 | panic("can't allocate buffers"); |
30d65dbf | 456 | |
1da177e4 LT |
457 | state = Start; |
458 | this_header = 0; | |
459 | message = NULL; | |
460 | while (!message && len) { | |
461 | loff_t saved_offset = this_header; | |
462 | if (*buf == '0' && !(this_header & 3)) { | |
463 | state = Start; | |
464 | written = write_buffer(buf, len); | |
465 | buf += written; | |
466 | len -= written; | |
467 | continue; | |
468 | } | |
469 | if (!*buf) { | |
470 | buf++; | |
471 | len--; | |
472 | this_header++; | |
473 | continue; | |
474 | } | |
475 | this_header = 0; | |
23a22d57 | 476 | decompress = decompress_method(buf, len, &compress_name); |
6aa7a29a | 477 | pr_debug("Detected %s compressed data\n", compress_name); |
54291362 | 478 | if (decompress) { |
d97b07c5 | 479 | int res = decompress(buf, len, NULL, flush_buffer, NULL, |
889c92d2 | 480 | &my_inptr, error); |
54291362 PL |
481 | if (res) |
482 | error("decompressor failed"); | |
483 | } else if (compress_name) { | |
23a22d57 PA |
484 | if (!message) { |
485 | snprintf(msg_buf, sizeof msg_buf, | |
486 | "compression method %s not configured", | |
487 | compress_name); | |
488 | message = msg_buf; | |
489 | } | |
df37bd15 | 490 | } else |
e5eed351 | 491 | error("invalid magic at start of compressed archive"); |
1da177e4 | 492 | if (state != Reset) |
e5eed351 | 493 | error("junk at the end of compressed archive"); |
30d65dbf AK |
494 | this_header = saved_offset + my_inptr; |
495 | buf += my_inptr; | |
496 | len -= my_inptr; | |
1da177e4 | 497 | } |
889d51a1 | 498 | dir_utime(); |
3265e66b TP |
499 | kfree(name_buf); |
500 | kfree(symlink_buf); | |
501 | kfree(header_buf); | |
1da177e4 LT |
502 | return message; |
503 | } | |
504 | ||
0a7b35cb MN |
505 | static int __initdata do_retain_initrd; |
506 | ||
507 | static int __init retain_initrd_param(char *str) | |
508 | { | |
509 | if (*str) | |
510 | return 0; | |
511 | do_retain_initrd = 1; | |
512 | return 1; | |
513 | } | |
514 | __setup("retain_initrd", retain_initrd_param); | |
515 | ||
ffe8018c HB |
516 | extern char __initramfs_start[]; |
517 | extern unsigned long __initramfs_size; | |
1da177e4 | 518 | #include <linux/initrd.h> |
9c15e852 | 519 | #include <linux/kexec.h> |
0f3d2bd5 | 520 | |
2965faa5 | 521 | #ifdef CONFIG_KEXEC_CORE |
23091e28 CH |
522 | static bool kexec_free_initrd(void) |
523 | { | |
9c15e852 HM |
524 | unsigned long crashk_start = (unsigned long)__va(crashk_res.start); |
525 | unsigned long crashk_end = (unsigned long)__va(crashk_res.end); | |
526 | ||
527 | /* | |
528 | * If the initrd region is overlapped with crashkernel reserved region, | |
529 | * free only memory that is not part of crashkernel region. | |
530 | */ | |
23091e28 CH |
531 | if (initrd_start >= crashk_end || initrd_end <= crashk_start) |
532 | return false; | |
533 | ||
534 | /* | |
535 | * Initialize initrd memory region since the kexec boot does not do. | |
536 | */ | |
537 | memset((void *)initrd_start, 0, initrd_end - initrd_start); | |
538 | if (initrd_start < crashk_start) | |
539 | free_initrd_mem(initrd_start, crashk_start); | |
540 | if (initrd_end > crashk_end) | |
541 | free_initrd_mem(crashk_end, initrd_end); | |
542 | return true; | |
0f3d2bd5 | 543 | } |
23091e28 CH |
544 | #else |
545 | static inline bool kexec_free_initrd(void) | |
546 | { | |
547 | return false; | |
548 | } | |
549 | #endif /* CONFIG_KEXEC_CORE */ | |
0f3d2bd5 | 550 | |
a841c673 | 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 | } | |
afef7889 CH |
598 | #else |
599 | static inline void clean_rootfs(void) | |
600 | { | |
601 | } | |
602 | #endif /* CONFIG_BLK_DEV_RAM */ | |
df52092f | 603 | |
7c184ecd CH |
604 | #ifdef CONFIG_BLK_DEV_RAM |
605 | static void populate_initrd_image(char *err) | |
606 | { | |
607 | ssize_t written; | |
608 | int fd; | |
609 | ||
610 | unpack_to_rootfs(__initramfs_start, __initramfs_size); | |
611 | ||
612 | printk(KERN_INFO "rootfs image is not initramfs (%s); looks like an initrd\n", | |
613 | err); | |
614 | fd = ksys_open("/initrd.image", O_WRONLY | O_CREAT, 0700); | |
615 | if (fd < 0) | |
616 | return; | |
617 | ||
618 | written = xwrite(fd, (char *)initrd_start, initrd_end - initrd_start); | |
619 | if (written != initrd_end - initrd_start) | |
620 | pr_err("/initrd.image: incomplete write (%zd != %ld)\n", | |
621 | written, initrd_end - initrd_start); | |
622 | ksys_close(fd); | |
623 | } | |
afef7889 CH |
624 | #else |
625 | static void populate_initrd_image(char *err) | |
626 | { | |
627 | printk(KERN_EMERG "Initramfs unpacking failed: %s\n", err); | |
628 | } | |
7c184ecd CH |
629 | #endif /* CONFIG_BLK_DEV_RAM */ |
630 | ||
9a9e0d68 | 631 | static int __init populate_rootfs(void) |
1da177e4 | 632 | { |
17a9be31 | 633 | /* Load the built in initramfs */ |
ffe8018c | 634 | char *err = unpack_to_rootfs(__initramfs_start, __initramfs_size); |
1da177e4 | 635 | if (err) |
499a4584 | 636 | panic("%s", err); /* Failed to decompress INTERNAL initramfs */ |
afef7889 CH |
637 | |
638 | if (!initrd_start || IS_ENABLED(CONFIG_INITRAMFS_FORCE)) | |
639 | goto done; | |
640 | ||
641 | if (IS_ENABLED(CONFIG_BLK_DEV_RAM)) | |
a1e6b6c1 | 642 | printk(KERN_INFO "Trying to unpack rootfs image as initramfs...\n"); |
afef7889 CH |
643 | else |
644 | printk(KERN_INFO "Unpacking initramfs...\n"); | |
54c7a891 | 645 | |
afef7889 CH |
646 | err = unpack_to_rootfs((char *)initrd_start, initrd_end - initrd_start); |
647 | if (err) { | |
54c7a891 | 648 | clean_rootfs(); |
7c184ecd | 649 | populate_initrd_image(err); |
1da177e4 | 650 | } |
23091e28 | 651 | |
afef7889 | 652 | done: |
23091e28 CH |
653 | /* |
654 | * If the initrd region is overlapped with crashkernel reserved region, | |
655 | * free only memory that is not part of crashkernel region. | |
656 | */ | |
657 | if (!do_retain_initrd && !kexec_free_initrd()) | |
658 | free_initrd_mem(initrd_start, initrd_end); | |
659 | initrd_start = 0; | |
660 | initrd_end = 0; | |
661 | ||
17a9be31 | 662 | flush_delayed_fput(); |
8d610dd5 | 663 | return 0; |
1da177e4 | 664 | } |
8d610dd5 | 665 | rootfs_initcall(populate_rootfs); |