blob: d65a5161cc73ca306490142661bd72b913207cd4
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * mkfs.c - make a linux (minix) file-system. |
4 | * |
5 | * (C) 1991 Linus Torvalds. |
6 | * |
7 | * Licensed under GPLv2, see file LICENSE in this source tree. |
8 | */ |
9 | |
10 | /* |
11 | * DD.MM.YY |
12 | * |
13 | * 24.11.91 - Time began. Used the fsck sources to get started. |
14 | * |
15 | * 25.11.91 - Corrected some bugs. Added support for ".badblocks" |
16 | * The algorithm for ".badblocks" is a bit weird, but |
17 | * it should work. Oh, well. |
18 | * |
19 | * 25.01.92 - Added the -l option for getting the list of bad blocks |
20 | * out of a named file. (Dave Rivers, rivers@ponds.uucp) |
21 | * |
22 | * 28.02.92 - Added %-information when using -c. |
23 | * |
24 | * 28.02.93 - Added support for other namelengths than the original |
25 | * 14 characters so that I can test the new kernel routines.. |
26 | * |
27 | * 09.10.93 - Make exit status conform to that required by fsutil |
28 | * (Rik Faith, faith@cs.unc.edu) |
29 | * |
30 | * 31.10.93 - Added inode request feature, for backup floppies: use |
31 | * 32 inodes, for a news partition use more. |
32 | * (Scott Heavner, sdh@po.cwru.edu) |
33 | * |
34 | * 03.01.94 - Added support for file system valid flag. |
35 | * (Dr. Wettstein, greg%wind.uucp@plains.nodak.edu) |
36 | * |
37 | * 30.10.94 - added support for v2 filesystem |
38 | * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de) |
39 | * |
40 | * 09.11.94 - Added test to prevent overwrite of mounted fs adapted |
41 | * from Theodore Ts'o's (tytso@athena.mit.edu) mke2fs |
42 | * program. (Daniel Quinlan, quinlan@yggdrasil.com) |
43 | * |
44 | * 03.20.95 - Clear first 512 bytes of filesystem to make certain that |
45 | * the filesystem is not misidentified as a MS-DOS FAT filesystem. |
46 | * (Daniel Quinlan, quinlan@yggdrasil.com) |
47 | * |
48 | * 02.07.96 - Added small patch from Russell King to make the program a |
49 | * good deal more portable (janl@math.uio.no) |
50 | * |
51 | * Usage: mkfs [-c | -l filename ] [-v] [-nXX] [-iXX] device [size-in-blocks] |
52 | * |
53 | * -c for readability checking (SLOW!) |
54 | * -l for getting a list of bad blocks from a file. |
55 | * -n for namelength (currently the kernel only uses 14 or 30) |
56 | * -i for number of inodes |
57 | * -v for v2 filesystem |
58 | * |
59 | * The device may be a block device or a image of one, but this isn't |
60 | * enforced (but it's not much fun on a character device :-). |
61 | * |
62 | * Modified for BusyBox by Erik Andersen <andersen@debian.org> -- |
63 | * removed getopt based parser and added a hand rolled one. |
64 | */ |
65 | |
66 | //usage:#define mkfs_minix_trivial_usage |
67 | //usage: "[-c | -l FILE] [-nXX] [-iXX] BLOCKDEV [KBYTES]" |
68 | //usage:#define mkfs_minix_full_usage "\n\n" |
69 | //usage: "Make a MINIX filesystem\n" |
70 | //usage: "\n -c Check device for bad blocks" |
71 | //usage: "\n -n [14|30] Maximum length of filenames" |
72 | //usage: "\n -i INODES Number of inodes for the filesystem" |
73 | //usage: "\n -l FILE Read bad blocks list from FILE" |
74 | //usage: "\n -v Make version 2 filesystem" |
75 | |
76 | #include "libbb.h" |
77 | #include <mntent.h> |
78 | |
79 | #include "minix.h" |
80 | |
81 | /* Store the very same times/uids/gids for image consistency */ |
82 | #if 1 |
83 | # define CUR_TIME 0 |
84 | # define GETUID 0 |
85 | # define GETGID 0 |
86 | #else |
87 | /* Was using this. Is it useful? NB: this will break testsuite */ |
88 | # define CUR_TIME time(NULL) |
89 | # define GETUID getuid() |
90 | # define GETGID getgid() |
91 | #endif |
92 | |
93 | enum { |
94 | MAX_GOOD_BLOCKS = 512, |
95 | TEST_BUFFER_BLOCKS = 16, |
96 | }; |
97 | |
98 | #if !ENABLE_FEATURE_MINIX2 |
99 | enum { version2 = 0 }; |
100 | #endif |
101 | |
102 | enum { dev_fd = 3 }; |
103 | |
104 | struct globals { |
105 | #if ENABLE_FEATURE_MINIX2 |
106 | smallint version2; |
107 | #define version2 G.version2 |
108 | #endif |
109 | char *device_name; |
110 | uint32_t total_blocks; |
111 | int badblocks; |
112 | int namelen; |
113 | int dirsize; |
114 | int magic; |
115 | char *inode_buffer; |
116 | char *inode_map; |
117 | char *zone_map; |
118 | int used_good_blocks; |
119 | unsigned long req_nr_inodes; |
120 | unsigned currently_testing; |
121 | |
122 | char root_block[BLOCK_SIZE]; |
123 | char superblock_buffer[BLOCK_SIZE]; |
124 | char boot_block_buffer[512]; |
125 | unsigned short good_blocks_table[MAX_GOOD_BLOCKS]; |
126 | /* check_blocks(): buffer[] was the biggest static in entire bbox */ |
127 | char check_blocks_buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS]; |
128 | |
129 | unsigned short ind_block1[BLOCK_SIZE >> 1]; |
130 | unsigned short dind_block1[BLOCK_SIZE >> 1]; |
131 | unsigned long ind_block2[BLOCK_SIZE >> 2]; |
132 | unsigned long dind_block2[BLOCK_SIZE >> 2]; |
133 | }; |
134 | #define G (*ptr_to_globals) |
135 | #define INIT_G() do { \ |
136 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ |
137 | } while (0) |
138 | |
139 | static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n) |
140 | { |
141 | return (size + n-1) / n; |
142 | } |
143 | |
144 | #define INODE_BUF1 (((struct minix1_inode*)G.inode_buffer) - 1) |
145 | #define INODE_BUF2 (((struct minix2_inode*)G.inode_buffer) - 1) |
146 | |
147 | #define SB (*(struct minix_superblock*)G.superblock_buffer) |
148 | |
149 | #define SB_INODES (SB.s_ninodes) |
150 | #define SB_IMAPS (SB.s_imap_blocks) |
151 | #define SB_ZMAPS (SB.s_zmap_blocks) |
152 | #define SB_FIRSTZONE (SB.s_firstdatazone) |
153 | #define SB_ZONE_SIZE (SB.s_log_zone_size) |
154 | #define SB_MAXSIZE (SB.s_max_size) |
155 | #define SB_MAGIC (SB.s_magic) |
156 | |
157 | #if !ENABLE_FEATURE_MINIX2 |
158 | # define SB_ZONES (SB.s_nzones) |
159 | # define INODE_BLOCKS div_roundup(SB_INODES, MINIX1_INODES_PER_BLOCK) |
160 | #else |
161 | # define SB_ZONES (version2 ? SB.s_zones : SB.s_nzones) |
162 | # define INODE_BLOCKS div_roundup(SB_INODES, \ |
163 | (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK)) |
164 | #endif |
165 | |
166 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE) |
167 | #define NORM_FIRSTZONE (2 + SB_IMAPS + SB_ZMAPS + INODE_BLOCKS) |
168 | |
169 | /* Before you ask "where they come from?": */ |
170 | /* setbit/clrbit are supplied by sys/param.h */ |
171 | |
172 | static int minix_bit(const char* a, unsigned i) |
173 | { |
174 | return a[i >> 3] & (1<<(i & 7)); |
175 | } |
176 | |
177 | static void minix_setbit(char *a, unsigned i) |
178 | { |
179 | setbit(a, i); |
180 | } |
181 | static void minix_clrbit(char *a, unsigned i) |
182 | { |
183 | clrbit(a, i); |
184 | } |
185 | |
186 | /* Note: do not assume 0/1, it is 0/nonzero */ |
187 | #define zone_in_use(x) minix_bit(G.zone_map,(x)-SB_FIRSTZONE+1) |
188 | /*#define inode_in_use(x) minix_bit(G.inode_map,(x))*/ |
189 | |
190 | #define mark_inode(x) minix_setbit(G.inode_map,(x)) |
191 | #define unmark_inode(x) minix_clrbit(G.inode_map,(x)) |
192 | #define mark_zone(x) minix_setbit(G.zone_map,(x)-SB_FIRSTZONE+1) |
193 | #define unmark_zone(x) minix_clrbit(G.zone_map,(x)-SB_FIRSTZONE+1) |
194 | |
195 | #ifndef BLKGETSIZE |
196 | # define BLKGETSIZE _IO(0x12,96) /* return device size */ |
197 | #endif |
198 | |
199 | static void write_tables(void) |
200 | { |
201 | /* Mark the superblock valid. */ |
202 | SB.s_state |= MINIX_VALID_FS; |
203 | SB.s_state &= ~MINIX_ERROR_FS; |
204 | |
205 | msg_eol = "seek to 0 failed"; |
206 | xlseek(dev_fd, 0, SEEK_SET); |
207 | |
208 | msg_eol = "can't clear boot sector"; |
209 | xwrite(dev_fd, G.boot_block_buffer, 512); |
210 | |
211 | msg_eol = "seek to BLOCK_SIZE failed"; |
212 | xlseek(dev_fd, BLOCK_SIZE, SEEK_SET); |
213 | |
214 | msg_eol = "can't write superblock"; |
215 | xwrite(dev_fd, G.superblock_buffer, BLOCK_SIZE); |
216 | |
217 | msg_eol = "can't write inode map"; |
218 | xwrite(dev_fd, G.inode_map, SB_IMAPS * BLOCK_SIZE); |
219 | |
220 | msg_eol = "can't write zone map"; |
221 | xwrite(dev_fd, G.zone_map, SB_ZMAPS * BLOCK_SIZE); |
222 | |
223 | msg_eol = "can't write inodes"; |
224 | xwrite(dev_fd, G.inode_buffer, INODE_BUFFER_SIZE); |
225 | |
226 | msg_eol = "\n"; |
227 | } |
228 | |
229 | static void write_block(int blk, char *buffer) |
230 | { |
231 | xlseek(dev_fd, blk * BLOCK_SIZE, SEEK_SET); |
232 | xwrite(dev_fd, buffer, BLOCK_SIZE); |
233 | } |
234 | |
235 | static int get_free_block(void) |
236 | { |
237 | int blk; |
238 | |
239 | if (G.used_good_blocks + 1 >= MAX_GOOD_BLOCKS) |
240 | bb_error_msg_and_die("too many bad blocks"); |
241 | if (G.used_good_blocks) |
242 | blk = G.good_blocks_table[G.used_good_blocks - 1] + 1; |
243 | else |
244 | blk = SB_FIRSTZONE; |
245 | while (blk < SB_ZONES && zone_in_use(blk)) |
246 | blk++; |
247 | if (blk >= SB_ZONES) |
248 | bb_error_msg_and_die("not enough good blocks"); |
249 | G.good_blocks_table[G.used_good_blocks] = blk; |
250 | G.used_good_blocks++; |
251 | return blk; |
252 | } |
253 | |
254 | static void mark_good_blocks(void) |
255 | { |
256 | int blk; |
257 | |
258 | for (blk = 0; blk < G.used_good_blocks; blk++) |
259 | mark_zone(G.good_blocks_table[blk]); |
260 | } |
261 | |
262 | static int next(int zone) |
263 | { |
264 | if (!zone) |
265 | zone = SB_FIRSTZONE - 1; |
266 | while (++zone < SB_ZONES) |
267 | if (zone_in_use(zone)) |
268 | return zone; |
269 | return 0; |
270 | } |
271 | |
272 | static void make_bad_inode(void) |
273 | { |
274 | struct minix1_inode *inode = &INODE_BUF1[MINIX_BAD_INO]; |
275 | int i, j, zone; |
276 | int ind = 0, dind = 0; |
277 | /* moved to globals to reduce stack usage |
278 | unsigned short ind_block[BLOCK_SIZE >> 1]; |
279 | unsigned short dind_block[BLOCK_SIZE >> 1]; |
280 | */ |
281 | #define ind_block (G.ind_block1) |
282 | #define dind_block (G.dind_block1) |
283 | |
284 | #define NEXT_BAD (zone = next(zone)) |
285 | |
286 | if (!G.badblocks) |
287 | return; |
288 | mark_inode(MINIX_BAD_INO); |
289 | inode->i_nlinks = 1; |
290 | /* BTW, setting this makes all images different */ |
291 | /* it's harder to check for bugs then - diff isn't helpful :(... */ |
292 | inode->i_time = CUR_TIME; |
293 | inode->i_mode = S_IFREG + 0000; |
294 | inode->i_size = G.badblocks * BLOCK_SIZE; |
295 | zone = next(0); |
296 | for (i = 0; i < 7; i++) { |
297 | inode->i_zone[i] = zone; |
298 | if (!NEXT_BAD) |
299 | goto end_bad; |
300 | } |
301 | inode->i_zone[7] = ind = get_free_block(); |
302 | memset(ind_block, 0, BLOCK_SIZE); |
303 | for (i = 0; i < 512; i++) { |
304 | ind_block[i] = zone; |
305 | if (!NEXT_BAD) |
306 | goto end_bad; |
307 | } |
308 | inode->i_zone[8] = dind = get_free_block(); |
309 | memset(dind_block, 0, BLOCK_SIZE); |
310 | for (i = 0; i < 512; i++) { |
311 | write_block(ind, (char *) ind_block); |
312 | dind_block[i] = ind = get_free_block(); |
313 | memset(ind_block, 0, BLOCK_SIZE); |
314 | for (j = 0; j < 512; j++) { |
315 | ind_block[j] = zone; |
316 | if (!NEXT_BAD) |
317 | goto end_bad; |
318 | } |
319 | } |
320 | bb_error_msg_and_die("too many bad blocks"); |
321 | end_bad: |
322 | if (ind) |
323 | write_block(ind, (char *) ind_block); |
324 | if (dind) |
325 | write_block(dind, (char *) dind_block); |
326 | #undef ind_block |
327 | #undef dind_block |
328 | } |
329 | |
330 | #if ENABLE_FEATURE_MINIX2 |
331 | static void make_bad_inode2(void) |
332 | { |
333 | struct minix2_inode *inode = &INODE_BUF2[MINIX_BAD_INO]; |
334 | int i, j, zone; |
335 | int ind = 0, dind = 0; |
336 | /* moved to globals to reduce stack usage |
337 | unsigned long ind_block[BLOCK_SIZE >> 2]; |
338 | unsigned long dind_block[BLOCK_SIZE >> 2]; |
339 | */ |
340 | #define ind_block (G.ind_block2) |
341 | #define dind_block (G.dind_block2) |
342 | |
343 | if (!G.badblocks) |
344 | return; |
345 | mark_inode(MINIX_BAD_INO); |
346 | inode->i_nlinks = 1; |
347 | inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME; |
348 | inode->i_mode = S_IFREG + 0000; |
349 | inode->i_size = G.badblocks * BLOCK_SIZE; |
350 | zone = next(0); |
351 | for (i = 0; i < 7; i++) { |
352 | inode->i_zone[i] = zone; |
353 | if (!NEXT_BAD) |
354 | goto end_bad; |
355 | } |
356 | inode->i_zone[7] = ind = get_free_block(); |
357 | memset(ind_block, 0, BLOCK_SIZE); |
358 | for (i = 0; i < 256; i++) { |
359 | ind_block[i] = zone; |
360 | if (!NEXT_BAD) |
361 | goto end_bad; |
362 | } |
363 | inode->i_zone[8] = dind = get_free_block(); |
364 | memset(dind_block, 0, BLOCK_SIZE); |
365 | for (i = 0; i < 256; i++) { |
366 | write_block(ind, (char *) ind_block); |
367 | dind_block[i] = ind = get_free_block(); |
368 | memset(ind_block, 0, BLOCK_SIZE); |
369 | for (j = 0; j < 256; j++) { |
370 | ind_block[j] = zone; |
371 | if (!NEXT_BAD) |
372 | goto end_bad; |
373 | } |
374 | } |
375 | /* Could make triple indirect block here */ |
376 | bb_error_msg_and_die("too many bad blocks"); |
377 | end_bad: |
378 | if (ind) |
379 | write_block(ind, (char *) ind_block); |
380 | if (dind) |
381 | write_block(dind, (char *) dind_block); |
382 | #undef ind_block |
383 | #undef dind_block |
384 | } |
385 | #else |
386 | void make_bad_inode2(void); |
387 | #endif |
388 | |
389 | static void make_root_inode(void) |
390 | { |
391 | struct minix1_inode *inode = &INODE_BUF1[MINIX_ROOT_INO]; |
392 | |
393 | mark_inode(MINIX_ROOT_INO); |
394 | inode->i_zone[0] = get_free_block(); |
395 | inode->i_nlinks = 2; |
396 | inode->i_time = CUR_TIME; |
397 | if (G.badblocks) |
398 | inode->i_size = 3 * G.dirsize; |
399 | else { |
400 | G.root_block[2 * G.dirsize] = '\0'; |
401 | G.root_block[2 * G.dirsize + 1] = '\0'; |
402 | inode->i_size = 2 * G.dirsize; |
403 | } |
404 | inode->i_mode = S_IFDIR + 0755; |
405 | inode->i_uid = GETUID; |
406 | if (inode->i_uid) |
407 | inode->i_gid = GETGID; |
408 | write_block(inode->i_zone[0], G.root_block); |
409 | } |
410 | |
411 | #if ENABLE_FEATURE_MINIX2 |
412 | static void make_root_inode2(void) |
413 | { |
414 | struct minix2_inode *inode = &INODE_BUF2[MINIX_ROOT_INO]; |
415 | |
416 | mark_inode(MINIX_ROOT_INO); |
417 | inode->i_zone[0] = get_free_block(); |
418 | inode->i_nlinks = 2; |
419 | inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME; |
420 | if (G.badblocks) |
421 | inode->i_size = 3 * G.dirsize; |
422 | else { |
423 | G.root_block[2 * G.dirsize] = '\0'; |
424 | G.root_block[2 * G.dirsize + 1] = '\0'; |
425 | inode->i_size = 2 * G.dirsize; |
426 | } |
427 | inode->i_mode = S_IFDIR + 0755; |
428 | inode->i_uid = GETUID; |
429 | if (inode->i_uid) |
430 | inode->i_gid = GETGID; |
431 | write_block(inode->i_zone[0], G.root_block); |
432 | } |
433 | #else |
434 | void make_root_inode2(void); |
435 | #endif |
436 | |
437 | /* |
438 | * Perform a test of a block; return the number of |
439 | * blocks readable. |
440 | */ |
441 | static size_t do_check(char *buffer, size_t try, unsigned current_block) |
442 | { |
443 | ssize_t got; |
444 | |
445 | /* Seek to the correct loc. */ |
446 | msg_eol = "seek failed during testing of blocks"; |
447 | xlseek(dev_fd, current_block * BLOCK_SIZE, SEEK_SET); |
448 | msg_eol = "\n"; |
449 | |
450 | /* Try the read */ |
451 | got = read(dev_fd, buffer, try * BLOCK_SIZE); |
452 | if (got < 0) |
453 | got = 0; |
454 | try = ((size_t)got) / BLOCK_SIZE; |
455 | |
456 | if (got & (BLOCK_SIZE - 1)) |
457 | fprintf(stderr, "Short read at block %u\n", (unsigned)(current_block + try)); |
458 | return try; |
459 | } |
460 | |
461 | static void alarm_intr(int alnum UNUSED_PARAM) |
462 | { |
463 | if (G.currently_testing >= SB_ZONES) |
464 | return; |
465 | signal(SIGALRM, alarm_intr); |
466 | alarm(5); |
467 | if (!G.currently_testing) |
468 | return; |
469 | printf("%d ...", G.currently_testing); |
470 | fflush_all(); |
471 | } |
472 | |
473 | static void check_blocks(void) |
474 | { |
475 | size_t try, got; |
476 | |
477 | G.currently_testing = 0; |
478 | signal(SIGALRM, alarm_intr); |
479 | alarm(5); |
480 | while (G.currently_testing < SB_ZONES) { |
481 | msg_eol = "seek failed in check_blocks"; |
482 | xlseek(dev_fd, G.currently_testing * BLOCK_SIZE, SEEK_SET); |
483 | msg_eol = "\n"; |
484 | try = TEST_BUFFER_BLOCKS; |
485 | if (G.currently_testing + try > SB_ZONES) |
486 | try = SB_ZONES - G.currently_testing; |
487 | got = do_check(G.check_blocks_buffer, try, G.currently_testing); |
488 | G.currently_testing += got; |
489 | if (got == try) |
490 | continue; |
491 | if (G.currently_testing < SB_FIRSTZONE) |
492 | bb_error_msg_and_die("bad blocks before data-area: cannot make fs"); |
493 | mark_zone(G.currently_testing); |
494 | G.badblocks++; |
495 | G.currently_testing++; |
496 | } |
497 | alarm(0); |
498 | printf("%d bad block(s)\n", G.badblocks); |
499 | } |
500 | |
501 | static void get_list_blocks(char *filename) |
502 | { |
503 | FILE *listfile; |
504 | unsigned long blockno; |
505 | |
506 | listfile = xfopen_for_read(filename); |
507 | while (!feof(listfile)) { |
508 | fscanf(listfile, "%lu\n", &blockno); |
509 | mark_zone(blockno); |
510 | G.badblocks++; |
511 | } |
512 | printf("%d bad block(s)\n", G.badblocks); |
513 | } |
514 | |
515 | static void setup_tables(void) |
516 | { |
517 | unsigned long inodes; |
518 | unsigned norm_firstzone; |
519 | unsigned sb_zmaps; |
520 | unsigned i; |
521 | |
522 | /* memset(G.superblock_buffer, 0, BLOCK_SIZE); */ |
523 | /* memset(G.boot_block_buffer, 0, 512); */ |
524 | SB_MAGIC = G.magic; |
525 | SB_ZONE_SIZE = 0; |
526 | SB_MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024; |
527 | if (version2) |
528 | SB.s_zones = G.total_blocks; |
529 | else |
530 | SB.s_nzones = G.total_blocks; |
531 | |
532 | /* some magic nrs: 1 inode / 3 blocks */ |
533 | if (G.req_nr_inodes == 0) |
534 | inodes = G.total_blocks / 3; |
535 | else |
536 | inodes = G.req_nr_inodes; |
537 | /* Round up inode count to fill block size */ |
538 | if (version2) |
539 | inodes = (inodes + MINIX2_INODES_PER_BLOCK - 1) & |
540 | ~(MINIX2_INODES_PER_BLOCK - 1); |
541 | else |
542 | inodes = (inodes + MINIX1_INODES_PER_BLOCK - 1) & |
543 | ~(MINIX1_INODES_PER_BLOCK - 1); |
544 | if (inodes > 65535) |
545 | inodes = 65535; |
546 | SB_INODES = inodes; |
547 | SB_IMAPS = div_roundup(SB_INODES + 1, BITS_PER_BLOCK); |
548 | |
549 | /* Real bad hack but overwise mkfs.minix can be thrown |
550 | * in infinite loop... |
551 | * try: |
552 | * dd if=/dev/zero of=test.fs count=10 bs=1024 |
553 | * mkfs.minix -i 200 test.fs |
554 | */ |
555 | /* This code is not insane: NORM_FIRSTZONE is not a constant, |
556 | * it is calculated from SB_INODES, SB_IMAPS and SB_ZMAPS */ |
557 | i = 999; |
558 | SB_ZMAPS = 0; |
559 | do { |
560 | norm_firstzone = NORM_FIRSTZONE; |
561 | sb_zmaps = div_roundup(G.total_blocks - norm_firstzone + 1, BITS_PER_BLOCK); |
562 | if (SB_ZMAPS == sb_zmaps) goto got_it; |
563 | SB_ZMAPS = sb_zmaps; |
564 | /* new SB_ZMAPS, need to recalc NORM_FIRSTZONE */ |
565 | } while (--i); |
566 | bb_error_msg_and_die("incompatible size/inode count, try different -i N"); |
567 | got_it: |
568 | |
569 | SB_FIRSTZONE = norm_firstzone; |
570 | G.inode_map = xmalloc(SB_IMAPS * BLOCK_SIZE); |
571 | G.zone_map = xmalloc(SB_ZMAPS * BLOCK_SIZE); |
572 | memset(G.inode_map, 0xff, SB_IMAPS * BLOCK_SIZE); |
573 | memset(G.zone_map, 0xff, SB_ZMAPS * BLOCK_SIZE); |
574 | for (i = SB_FIRSTZONE; i < SB_ZONES; i++) |
575 | unmark_zone(i); |
576 | for (i = MINIX_ROOT_INO; i <= SB_INODES; i++) |
577 | unmark_inode(i); |
578 | G.inode_buffer = xzalloc(INODE_BUFFER_SIZE); |
579 | printf("%ld inodes\n", (long)SB_INODES); |
580 | printf("%ld blocks\n", (long)SB_ZONES); |
581 | printf("Firstdatazone=%ld (%ld)\n", (long)SB_FIRSTZONE, (long)norm_firstzone); |
582 | printf("Zonesize=%d\n", BLOCK_SIZE << SB_ZONE_SIZE); |
583 | printf("Maxsize=%ld\n", (long)SB_MAXSIZE); |
584 | } |
585 | |
586 | int mkfs_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
587 | int mkfs_minix_main(int argc UNUSED_PARAM, char **argv) |
588 | { |
589 | unsigned opt; |
590 | char *tmp; |
591 | char *str_i; |
592 | char *listfile = NULL; |
593 | |
594 | INIT_G(); |
595 | /* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */ |
596 | G.namelen = 30; |
597 | G.dirsize = 32; |
598 | G.magic = MINIX1_SUPER_MAGIC2; |
599 | |
600 | if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) |
601 | bb_error_msg_and_die("bad inode size"); |
602 | #if ENABLE_FEATURE_MINIX2 |
603 | if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) |
604 | bb_error_msg_and_die("bad inode size"); |
605 | #endif |
606 | |
607 | opt_complementary = "n+"; /* -n N */ |
608 | opt = getopt32(argv, "ci:l:n:v", &str_i, &listfile, &G.namelen); |
609 | argv += optind; |
610 | //if (opt & 1) -c |
611 | if (opt & 2) G.req_nr_inodes = xatoul(str_i); // -i |
612 | //if (opt & 4) -l |
613 | if (opt & 8) { // -n |
614 | if (G.namelen == 14) G.magic = MINIX1_SUPER_MAGIC; |
615 | else if (G.namelen == 30) G.magic = MINIX1_SUPER_MAGIC2; |
616 | else bb_show_usage(); |
617 | G.dirsize = G.namelen + 2; |
618 | } |
619 | if (opt & 0x10) { // -v |
620 | #if ENABLE_FEATURE_MINIX2 |
621 | version2 = 1; |
622 | #else |
623 | bb_error_msg_and_die("not compiled with minix v2 support"); |
624 | #endif |
625 | } |
626 | |
627 | G.device_name = argv[0]; |
628 | if (!G.device_name) |
629 | bb_show_usage(); |
630 | |
631 | /* Check if it is mounted */ |
632 | if (find_mount_point(G.device_name, 0)) |
633 | bb_error_msg_and_die("can't format mounted filesystem"); |
634 | |
635 | xmove_fd(xopen(G.device_name, O_RDWR), dev_fd); |
636 | |
637 | G.total_blocks = get_volume_size_in_bytes(dev_fd, argv[1], 1024, /*extend:*/ 1) / 1024; |
638 | |
639 | if (G.total_blocks < 10) |
640 | bb_error_msg_and_die("must have at least 10 blocks"); |
641 | |
642 | if (version2) { |
643 | G.magic = MINIX2_SUPER_MAGIC2; |
644 | if (G.namelen == 14) |
645 | G.magic = MINIX2_SUPER_MAGIC; |
646 | } else if (G.total_blocks > 65535) |
647 | G.total_blocks = 65535; |
648 | #if 0 |
649 | struct stat statbuf; |
650 | xfstat(dev_fd, &statbuf, G.device_name); |
651 | /* why? */ |
652 | if (!S_ISBLK(statbuf.st_mode)) |
653 | opt &= ~1; // clear -c (check) |
654 | #if 0 |
655 | /* I don't know why someone has special code to prevent mkfs.minix |
656 | * on IDE devices. Why IDE but not SCSI, etc?... */ |
657 | else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340) |
658 | /* what is this? */ |
659 | bb_error_msg_and_die("will not try " |
660 | "to make filesystem on '%s'", G.device_name); |
661 | #endif |
662 | #endif |
663 | tmp = G.root_block; |
664 | *(short *) tmp = 1; |
665 | strcpy(tmp + 2, "."); |
666 | tmp += G.dirsize; |
667 | *(short *) tmp = 1; |
668 | strcpy(tmp + 2, ".."); |
669 | tmp += G.dirsize; |
670 | *(short *) tmp = 2; |
671 | strcpy(tmp + 2, ".badblocks"); |
672 | |
673 | setup_tables(); |
674 | |
675 | if (opt & 1) // -c ? |
676 | check_blocks(); |
677 | else if (listfile) |
678 | get_list_blocks(listfile); |
679 | |
680 | if (version2) { |
681 | make_root_inode2(); |
682 | make_bad_inode2(); |
683 | } else { |
684 | make_root_inode(); |
685 | make_bad_inode(); |
686 | } |
687 | |
688 | mark_good_blocks(); |
689 | write_tables(); |
690 | return 0; |
691 | } |
692 |