1 | /* vi: set sw=4 ts=4: */
|
---|
2 | /*
|
---|
3 | * mkfs.c - make a linux (minix) file-system.
|
---|
4 | *
|
---|
5 | * (C) 1991 Linus Torvalds. This file may be redistributed as per
|
---|
6 | * the Linux copyright.
|
---|
7 | */
|
---|
8 |
|
---|
9 | /*
|
---|
10 | * DD.MM.YY
|
---|
11 | *
|
---|
12 | * 24.11.91 - Time began. Used the fsck sources to get started.
|
---|
13 | *
|
---|
14 | * 25.11.91 - Corrected some bugs. Added support for ".badblocks"
|
---|
15 | * The algorithm for ".badblocks" is a bit weird, but
|
---|
16 | * it should work. Oh, well.
|
---|
17 | *
|
---|
18 | * 25.01.92 - Added the -l option for getting the list of bad blocks
|
---|
19 | * out of a named file. (Dave Rivers, rivers@ponds.uucp)
|
---|
20 | *
|
---|
21 | * 28.02.92 - Added %-information when using -c.
|
---|
22 | *
|
---|
23 | * 28.02.93 - Added support for other namelengths than the original
|
---|
24 | * 14 characters so that I can test the new kernel routines..
|
---|
25 | *
|
---|
26 | * 09.10.93 - Make exit status conform to that required by fsutil
|
---|
27 | * (Rik Faith, faith@cs.unc.edu)
|
---|
28 | *
|
---|
29 | * 31.10.93 - Added inode request feature, for backup floppies: use
|
---|
30 | * 32 inodes, for a news partition use more.
|
---|
31 | * (Scott Heavner, sdh@po.cwru.edu)
|
---|
32 | *
|
---|
33 | * 03.01.94 - Added support for file system valid flag.
|
---|
34 | * (Dr. Wettstein, greg%wind.uucp@plains.nodak.edu)
|
---|
35 | *
|
---|
36 | * 30.10.94 - added support for v2 filesystem
|
---|
37 | * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
|
---|
38 | *
|
---|
39 | * 09.11.94 - Added test to prevent overwrite of mounted fs adapted
|
---|
40 | * from Theodore Ts'o's (tytso@athena.mit.edu) mke2fs
|
---|
41 | * program. (Daniel Quinlan, quinlan@yggdrasil.com)
|
---|
42 | *
|
---|
43 | * 03.20.95 - Clear first 512 bytes of filesystem to make certain that
|
---|
44 | * the filesystem is not misidentified as a MS-DOS FAT filesystem.
|
---|
45 | * (Daniel Quinlan, quinlan@yggdrasil.com)
|
---|
46 | *
|
---|
47 | * 02.07.96 - Added small patch from Russell King to make the program a
|
---|
48 | * good deal more portable (janl@math.uio.no)
|
---|
49 | *
|
---|
50 | * Usage: mkfs [-c | -l filename ] [-v] [-nXX] [-iXX] device [size-in-blocks]
|
---|
51 | *
|
---|
52 | * -c for readability checking (SLOW!)
|
---|
53 | * -l for getting a list of bad blocks from a file.
|
---|
54 | * -n for namelength (currently the kernel only uses 14 or 30)
|
---|
55 | * -i for number of inodes
|
---|
56 | * -v for v2 filesystem
|
---|
57 | *
|
---|
58 | * The device may be a block device or a image of one, but this isn't
|
---|
59 | * enforced (but it's not much fun on a character device :-).
|
---|
60 | *
|
---|
61 | * Modified for BusyBox by Erik Andersen <andersen@debian.org> --
|
---|
62 | * removed getopt based parser and added a hand rolled one.
|
---|
63 | */
|
---|
64 |
|
---|
65 | #include "libbb.h"
|
---|
66 | #include <mntent.h>
|
---|
67 |
|
---|
68 | #include "minix.h"
|
---|
69 |
|
---|
70 | #define DEBUG 0
|
---|
71 |
|
---|
72 | /* If debugging, store the very same times/uids/gids for image consistency */
|
---|
73 | #if DEBUG
|
---|
74 | # define CUR_TIME 0
|
---|
75 | # define GETUID 0
|
---|
76 | # define GETGID 0
|
---|
77 | #else
|
---|
78 | # define CUR_TIME time(NULL)
|
---|
79 | # define GETUID getuid()
|
---|
80 | # define GETGID getgid()
|
---|
81 | #endif
|
---|
82 |
|
---|
83 | enum {
|
---|
84 | MAX_GOOD_BLOCKS = 512,
|
---|
85 | TEST_BUFFER_BLOCKS = 16,
|
---|
86 | };
|
---|
87 |
|
---|
88 | #if !ENABLE_FEATURE_MINIX2
|
---|
89 | enum { version2 = 0 };
|
---|
90 | #endif
|
---|
91 |
|
---|
92 | struct globals {
|
---|
93 | int dev_fd;
|
---|
94 |
|
---|
95 | #if ENABLE_FEATURE_MINIX2
|
---|
96 | smallint version2;
|
---|
97 | #define version2 G.version2
|
---|
98 | #endif
|
---|
99 | char *device_name;
|
---|
100 | uint32_t total_blocks;
|
---|
101 | int badblocks;
|
---|
102 | int namelen;
|
---|
103 | int dirsize;
|
---|
104 | int magic;
|
---|
105 | char *inode_buffer;
|
---|
106 | char *inode_map;
|
---|
107 | char *zone_map;
|
---|
108 | int used_good_blocks;
|
---|
109 | unsigned long req_nr_inodes;
|
---|
110 | unsigned currently_testing;
|
---|
111 |
|
---|
112 |
|
---|
113 | char root_block[BLOCK_SIZE];
|
---|
114 | char super_block_buffer[BLOCK_SIZE];
|
---|
115 | char boot_block_buffer[512];
|
---|
116 | unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
|
---|
117 | /* check_blocks(): buffer[] was the biggest static in entire bbox */
|
---|
118 | char check_blocks_buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
|
---|
119 | };
|
---|
120 |
|
---|
121 | #define G (*ptr_to_globals)
|
---|
122 |
|
---|
123 | static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
|
---|
124 | {
|
---|
125 | return (size + n-1) / n;
|
---|
126 | }
|
---|
127 |
|
---|
128 | #define INODE_BUF1 (((struct minix1_inode*)G.inode_buffer) - 1)
|
---|
129 | #define INODE_BUF2 (((struct minix2_inode*)G.inode_buffer) - 1)
|
---|
130 |
|
---|
131 | #define SB (*(struct minix_super_block*)G.super_block_buffer)
|
---|
132 |
|
---|
133 | #define SB_INODES (SB.s_ninodes)
|
---|
134 | #define SB_IMAPS (SB.s_imap_blocks)
|
---|
135 | #define SB_ZMAPS (SB.s_zmap_blocks)
|
---|
136 | #define SB_FIRSTZONE (SB.s_firstdatazone)
|
---|
137 | #define SB_ZONE_SIZE (SB.s_log_zone_size)
|
---|
138 | #define SB_MAXSIZE (SB.s_max_size)
|
---|
139 | #define SB_MAGIC (SB.s_magic)
|
---|
140 |
|
---|
141 | #if !ENABLE_FEATURE_MINIX2
|
---|
142 | # define SB_ZONES (SB.s_nzones)
|
---|
143 | # define INODE_BLOCKS div_roundup(SB_INODES, MINIX1_INODES_PER_BLOCK)
|
---|
144 | #else
|
---|
145 | # define SB_ZONES (version2 ? SB.s_zones : SB.s_nzones)
|
---|
146 | # define INODE_BLOCKS div_roundup(SB_INODES, \
|
---|
147 | version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK)
|
---|
148 | #endif
|
---|
149 |
|
---|
150 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
|
---|
151 | #define NORM_FIRSTZONE (2 + SB_IMAPS + SB_ZMAPS + INODE_BLOCKS)
|
---|
152 |
|
---|
153 | /* Before you ask "where they come from?": */
|
---|
154 | /* setbit/clrbit are supplied by sys/param.h */
|
---|
155 |
|
---|
156 | static int minix_bit(const char* a, unsigned i)
|
---|
157 | {
|
---|
158 | return a[i >> 3] & (1<<(i & 7));
|
---|
159 | }
|
---|
160 |
|
---|
161 | static void minix_setbit(char *a, unsigned i)
|
---|
162 | {
|
---|
163 | setbit(a, i);
|
---|
164 | }
|
---|
165 | static void minix_clrbit(char *a, unsigned i)
|
---|
166 | {
|
---|
167 | clrbit(a, i);
|
---|
168 | }
|
---|
169 |
|
---|
170 | /* Note: do not assume 0/1, it is 0/nonzero */
|
---|
171 | #define zone_in_use(x) minix_bit(G.zone_map,(x)-SB_FIRSTZONE+1)
|
---|
172 | /*#define inode_in_use(x) minix_bit(G.inode_map,(x))*/
|
---|
173 |
|
---|
174 | #define mark_inode(x) minix_setbit(G.inode_map,(x))
|
---|
175 | #define unmark_inode(x) minix_clrbit(G.inode_map,(x))
|
---|
176 | #define mark_zone(x) minix_setbit(G.zone_map,(x)-SB_FIRSTZONE+1)
|
---|
177 | #define unmark_zone(x) minix_clrbit(G.zone_map,(x)-SB_FIRSTZONE+1)
|
---|
178 |
|
---|
179 | #ifndef BLKGETSIZE
|
---|
180 | # define BLKGETSIZE _IO(0x12,96) /* return device size */
|
---|
181 | #endif
|
---|
182 |
|
---|
183 |
|
---|
184 | static long valid_offset(int fd, int offset)
|
---|
185 | {
|
---|
186 | char ch;
|
---|
187 |
|
---|
188 | if (lseek(fd, offset, SEEK_SET) < 0)
|
---|
189 | return 0;
|
---|
190 | if (read(fd, &ch, 1) < 1)
|
---|
191 | return 0;
|
---|
192 | return 1;
|
---|
193 | }
|
---|
194 |
|
---|
195 | static int count_blocks(int fd)
|
---|
196 | {
|
---|
197 | int high, low;
|
---|
198 |
|
---|
199 | low = 0;
|
---|
200 | for (high = 1; valid_offset(fd, high); high *= 2)
|
---|
201 | low = high;
|
---|
202 |
|
---|
203 | while (low < high - 1) {
|
---|
204 | const int mid = (low + high) / 2;
|
---|
205 |
|
---|
206 | if (valid_offset(fd, mid))
|
---|
207 | low = mid;
|
---|
208 | else
|
---|
209 | high = mid;
|
---|
210 | }
|
---|
211 | valid_offset(fd, 0);
|
---|
212 | return (low + 1);
|
---|
213 | }
|
---|
214 |
|
---|
215 | static int get_size(const char *file)
|
---|
216 | {
|
---|
217 | int fd;
|
---|
218 | long size;
|
---|
219 |
|
---|
220 | fd = xopen(file, O_RDWR);
|
---|
221 | if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
|
---|
222 | close(fd);
|
---|
223 | return (size * 512);
|
---|
224 | }
|
---|
225 |
|
---|
226 | size = count_blocks(fd);
|
---|
227 | close(fd);
|
---|
228 | return size;
|
---|
229 | }
|
---|
230 |
|
---|
231 | static void write_tables(void)
|
---|
232 | {
|
---|
233 | /* Mark the super block valid. */
|
---|
234 | SB.s_state |= MINIX_VALID_FS;
|
---|
235 | SB.s_state &= ~MINIX_ERROR_FS;
|
---|
236 |
|
---|
237 | msg_eol = "seek to 0 failed";
|
---|
238 | xlseek(G.dev_fd, 0, SEEK_SET);
|
---|
239 |
|
---|
240 | msg_eol = "cannot clear boot sector";
|
---|
241 | xwrite(G.dev_fd, G.boot_block_buffer, 512);
|
---|
242 |
|
---|
243 | msg_eol = "seek to BLOCK_SIZE failed";
|
---|
244 | xlseek(G.dev_fd, BLOCK_SIZE, SEEK_SET);
|
---|
245 |
|
---|
246 | msg_eol = "cannot write superblock";
|
---|
247 | xwrite(G.dev_fd, G.super_block_buffer, BLOCK_SIZE);
|
---|
248 |
|
---|
249 | msg_eol = "cannot write inode map";
|
---|
250 | xwrite(G.dev_fd, G.inode_map, SB_IMAPS * BLOCK_SIZE);
|
---|
251 |
|
---|
252 | msg_eol = "cannot write zone map";
|
---|
253 | xwrite(G.dev_fd, G.zone_map, SB_ZMAPS * BLOCK_SIZE);
|
---|
254 |
|
---|
255 | msg_eol = "cannot write inodes";
|
---|
256 | xwrite(G.dev_fd, G.inode_buffer, INODE_BUFFER_SIZE);
|
---|
257 |
|
---|
258 | msg_eol = "\n";
|
---|
259 | }
|
---|
260 |
|
---|
261 | static void write_block(int blk, char *buffer)
|
---|
262 | {
|
---|
263 | xlseek(G.dev_fd, blk * BLOCK_SIZE, SEEK_SET);
|
---|
264 | xwrite(G.dev_fd, buffer, BLOCK_SIZE);
|
---|
265 | }
|
---|
266 |
|
---|
267 | static int get_free_block(void)
|
---|
268 | {
|
---|
269 | int blk;
|
---|
270 |
|
---|
271 | if (G.used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
|
---|
272 | bb_error_msg_and_die("too many bad blocks");
|
---|
273 | if (G.used_good_blocks)
|
---|
274 | blk = G.good_blocks_table[G.used_good_blocks - 1] + 1;
|
---|
275 | else
|
---|
276 | blk = SB_FIRSTZONE;
|
---|
277 | while (blk < SB_ZONES && zone_in_use(blk))
|
---|
278 | blk++;
|
---|
279 | if (blk >= SB_ZONES)
|
---|
280 | bb_error_msg_and_die("not enough good blocks");
|
---|
281 | G.good_blocks_table[G.used_good_blocks] = blk;
|
---|
282 | G.used_good_blocks++;
|
---|
283 | return blk;
|
---|
284 | }
|
---|
285 |
|
---|
286 | static void mark_good_blocks(void)
|
---|
287 | {
|
---|
288 | int blk;
|
---|
289 |
|
---|
290 | for (blk = 0; blk < G.used_good_blocks; blk++)
|
---|
291 | mark_zone(G.good_blocks_table[blk]);
|
---|
292 | }
|
---|
293 |
|
---|
294 | static int next(int zone)
|
---|
295 | {
|
---|
296 | if (!zone)
|
---|
297 | zone = SB_FIRSTZONE - 1;
|
---|
298 | while (++zone < SB_ZONES)
|
---|
299 | if (zone_in_use(zone))
|
---|
300 | return zone;
|
---|
301 | return 0;
|
---|
302 | }
|
---|
303 |
|
---|
304 | static void make_bad_inode(void)
|
---|
305 | {
|
---|
306 | struct minix1_inode *inode = &INODE_BUF1[MINIX_BAD_INO];
|
---|
307 | int i, j, zone;
|
---|
308 | int ind = 0, dind = 0;
|
---|
309 | unsigned short ind_block[BLOCK_SIZE >> 1];
|
---|
310 | unsigned short dind_block[BLOCK_SIZE >> 1];
|
---|
311 |
|
---|
312 | #define NEXT_BAD (zone = next(zone))
|
---|
313 |
|
---|
314 | if (!G.badblocks)
|
---|
315 | return;
|
---|
316 | mark_inode(MINIX_BAD_INO);
|
---|
317 | inode->i_nlinks = 1;
|
---|
318 | /* BTW, setting this makes all images different */
|
---|
319 | /* it's harder to check for bugs then - diff isn't helpful :(... */
|
---|
320 | inode->i_time = CUR_TIME;
|
---|
321 | inode->i_mode = S_IFREG + 0000;
|
---|
322 | inode->i_size = G.badblocks * BLOCK_SIZE;
|
---|
323 | zone = next(0);
|
---|
324 | for (i = 0; i < 7; i++) {
|
---|
325 | inode->i_zone[i] = zone;
|
---|
326 | if (!NEXT_BAD)
|
---|
327 | goto end_bad;
|
---|
328 | }
|
---|
329 | inode->i_zone[7] = ind = get_free_block();
|
---|
330 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
331 | for (i = 0; i < 512; i++) {
|
---|
332 | ind_block[i] = zone;
|
---|
333 | if (!NEXT_BAD)
|
---|
334 | goto end_bad;
|
---|
335 | }
|
---|
336 | inode->i_zone[8] = dind = get_free_block();
|
---|
337 | memset(dind_block, 0, BLOCK_SIZE);
|
---|
338 | for (i = 0; i < 512; i++) {
|
---|
339 | write_block(ind, (char *) ind_block);
|
---|
340 | dind_block[i] = ind = get_free_block();
|
---|
341 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
342 | for (j = 0; j < 512; j++) {
|
---|
343 | ind_block[j] = zone;
|
---|
344 | if (!NEXT_BAD)
|
---|
345 | goto end_bad;
|
---|
346 | }
|
---|
347 | }
|
---|
348 | bb_error_msg_and_die("too many bad blocks");
|
---|
349 | end_bad:
|
---|
350 | if (ind)
|
---|
351 | write_block(ind, (char *) ind_block);
|
---|
352 | if (dind)
|
---|
353 | write_block(dind, (char *) dind_block);
|
---|
354 | }
|
---|
355 |
|
---|
356 | #if ENABLE_FEATURE_MINIX2
|
---|
357 | static void make_bad_inode2(void)
|
---|
358 | {
|
---|
359 | struct minix2_inode *inode = &INODE_BUF2[MINIX_BAD_INO];
|
---|
360 | int i, j, zone;
|
---|
361 | int ind = 0, dind = 0;
|
---|
362 | unsigned long ind_block[BLOCK_SIZE >> 2];
|
---|
363 | unsigned long dind_block[BLOCK_SIZE >> 2];
|
---|
364 |
|
---|
365 | if (!G.badblocks)
|
---|
366 | return;
|
---|
367 | mark_inode(MINIX_BAD_INO);
|
---|
368 | inode->i_nlinks = 1;
|
---|
369 | inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
|
---|
370 | inode->i_mode = S_IFREG + 0000;
|
---|
371 | inode->i_size = G.badblocks * BLOCK_SIZE;
|
---|
372 | zone = next(0);
|
---|
373 | for (i = 0; i < 7; i++) {
|
---|
374 | inode->i_zone[i] = zone;
|
---|
375 | if (!NEXT_BAD)
|
---|
376 | goto end_bad;
|
---|
377 | }
|
---|
378 | inode->i_zone[7] = ind = get_free_block();
|
---|
379 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
380 | for (i = 0; i < 256; i++) {
|
---|
381 | ind_block[i] = zone;
|
---|
382 | if (!NEXT_BAD)
|
---|
383 | goto end_bad;
|
---|
384 | }
|
---|
385 | inode->i_zone[8] = dind = get_free_block();
|
---|
386 | memset(dind_block, 0, BLOCK_SIZE);
|
---|
387 | for (i = 0; i < 256; i++) {
|
---|
388 | write_block(ind, (char *) ind_block);
|
---|
389 | dind_block[i] = ind = get_free_block();
|
---|
390 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
391 | for (j = 0; j < 256; j++) {
|
---|
392 | ind_block[j] = zone;
|
---|
393 | if (!NEXT_BAD)
|
---|
394 | goto end_bad;
|
---|
395 | }
|
---|
396 | }
|
---|
397 | /* Could make triple indirect block here */
|
---|
398 | bb_error_msg_and_die("too many bad blocks");
|
---|
399 | end_bad:
|
---|
400 | if (ind)
|
---|
401 | write_block(ind, (char *) ind_block);
|
---|
402 | if (dind)
|
---|
403 | write_block(dind, (char *) dind_block);
|
---|
404 | }
|
---|
405 | #else
|
---|
406 | void make_bad_inode2(void);
|
---|
407 | #endif
|
---|
408 |
|
---|
409 | static void make_root_inode(void)
|
---|
410 | {
|
---|
411 | struct minix1_inode *inode = &INODE_BUF1[MINIX_ROOT_INO];
|
---|
412 |
|
---|
413 | mark_inode(MINIX_ROOT_INO);
|
---|
414 | inode->i_zone[0] = get_free_block();
|
---|
415 | inode->i_nlinks = 2;
|
---|
416 | inode->i_time = CUR_TIME;
|
---|
417 | if (G.badblocks)
|
---|
418 | inode->i_size = 3 * G.dirsize;
|
---|
419 | else {
|
---|
420 | G.root_block[2 * G.dirsize] = '\0';
|
---|
421 | G.root_block[2 * G.dirsize + 1] = '\0';
|
---|
422 | inode->i_size = 2 * G.dirsize;
|
---|
423 | }
|
---|
424 | inode->i_mode = S_IFDIR + 0755;
|
---|
425 | inode->i_uid = GETUID;
|
---|
426 | if (inode->i_uid)
|
---|
427 | inode->i_gid = GETGID;
|
---|
428 | write_block(inode->i_zone[0], G.root_block);
|
---|
429 | }
|
---|
430 |
|
---|
431 | #if ENABLE_FEATURE_MINIX2
|
---|
432 | static void make_root_inode2(void)
|
---|
433 | {
|
---|
434 | struct minix2_inode *inode = &INODE_BUF2[MINIX_ROOT_INO];
|
---|
435 |
|
---|
436 | mark_inode(MINIX_ROOT_INO);
|
---|
437 | inode->i_zone[0] = get_free_block();
|
---|
438 | inode->i_nlinks = 2;
|
---|
439 | inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
|
---|
440 | if (G.badblocks)
|
---|
441 | inode->i_size = 3 * G.dirsize;
|
---|
442 | else {
|
---|
443 | G.root_block[2 * G.dirsize] = '\0';
|
---|
444 | G.root_block[2 * G.dirsize + 1] = '\0';
|
---|
445 | inode->i_size = 2 * G.dirsize;
|
---|
446 | }
|
---|
447 | inode->i_mode = S_IFDIR + 0755;
|
---|
448 | inode->i_uid = GETUID;
|
---|
449 | if (inode->i_uid)
|
---|
450 | inode->i_gid = GETGID;
|
---|
451 | write_block(inode->i_zone[0], G.root_block);
|
---|
452 | }
|
---|
453 | #else
|
---|
454 | void make_root_inode2(void);
|
---|
455 | #endif
|
---|
456 |
|
---|
457 | /*
|
---|
458 | * Perform a test of a block; return the number of
|
---|
459 | * blocks readable.
|
---|
460 | */
|
---|
461 | static size_t do_check(char *buffer, size_t try, unsigned current_block)
|
---|
462 | {
|
---|
463 | ssize_t got;
|
---|
464 |
|
---|
465 | /* Seek to the correct loc. */
|
---|
466 | msg_eol = "seek failed during testing of blocks";
|
---|
467 | xlseek(G.dev_fd, current_block * BLOCK_SIZE, SEEK_SET);
|
---|
468 | msg_eol = "\n";
|
---|
469 |
|
---|
470 | /* Try the read */
|
---|
471 | got = read(G.dev_fd, buffer, try * BLOCK_SIZE);
|
---|
472 | if (got < 0)
|
---|
473 | got = 0;
|
---|
474 | try = ((size_t)got) / BLOCK_SIZE;
|
---|
475 |
|
---|
476 | if (got & (BLOCK_SIZE - 1))
|
---|
477 | fprintf(stderr, "Short read at block %u\n", (unsigned)(current_block + try));
|
---|
478 | return try;
|
---|
479 | }
|
---|
480 |
|
---|
481 | static void alarm_intr(int alnum)
|
---|
482 | {
|
---|
483 | if (G.currently_testing >= SB_ZONES)
|
---|
484 | return;
|
---|
485 | signal(SIGALRM, alarm_intr);
|
---|
486 | alarm(5);
|
---|
487 | if (!G.currently_testing)
|
---|
488 | return;
|
---|
489 | printf("%d ...", G.currently_testing);
|
---|
490 | fflush(stdout);
|
---|
491 | }
|
---|
492 |
|
---|
493 | static void check_blocks(void)
|
---|
494 | {
|
---|
495 | size_t try, got;
|
---|
496 |
|
---|
497 | G.currently_testing = 0;
|
---|
498 | signal(SIGALRM, alarm_intr);
|
---|
499 | alarm(5);
|
---|
500 | while (G.currently_testing < SB_ZONES) {
|
---|
501 | msg_eol = "seek failed in check_blocks";
|
---|
502 | xlseek(G.dev_fd, G.currently_testing * BLOCK_SIZE, SEEK_SET);
|
---|
503 | msg_eol = "\n";
|
---|
504 | try = TEST_BUFFER_BLOCKS;
|
---|
505 | if (G.currently_testing + try > SB_ZONES)
|
---|
506 | try = SB_ZONES - G.currently_testing;
|
---|
507 | got = do_check(G.check_blocks_buffer, try, G.currently_testing);
|
---|
508 | G.currently_testing += got;
|
---|
509 | if (got == try)
|
---|
510 | continue;
|
---|
511 | if (G.currently_testing < SB_FIRSTZONE)
|
---|
512 | bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
|
---|
513 | mark_zone(G.currently_testing);
|
---|
514 | G.badblocks++;
|
---|
515 | G.currently_testing++;
|
---|
516 | }
|
---|
517 | alarm(0);
|
---|
518 | printf("%d bad block(s)\n", G.badblocks);
|
---|
519 | }
|
---|
520 |
|
---|
521 | static void get_list_blocks(char *filename)
|
---|
522 | {
|
---|
523 | FILE *listfile;
|
---|
524 | unsigned long blockno;
|
---|
525 |
|
---|
526 | listfile = xfopen(filename, "r");
|
---|
527 | while (!feof(listfile)) {
|
---|
528 | fscanf(listfile, "%ld\n", &blockno);
|
---|
529 | mark_zone(blockno);
|
---|
530 | G.badblocks++;
|
---|
531 | }
|
---|
532 | printf("%d bad block(s)\n", G.badblocks);
|
---|
533 | }
|
---|
534 |
|
---|
535 | static void setup_tables(void)
|
---|
536 | {
|
---|
537 | unsigned long inodes;
|
---|
538 | unsigned norm_firstzone;
|
---|
539 | unsigned sb_zmaps;
|
---|
540 | unsigned i;
|
---|
541 |
|
---|
542 | /* memset(G.super_block_buffer, 0, BLOCK_SIZE); */
|
---|
543 | /* memset(G.boot_block_buffer, 0, 512); */
|
---|
544 | SB_MAGIC = G.magic;
|
---|
545 | SB_ZONE_SIZE = 0;
|
---|
546 | SB_MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
|
---|
547 | if (version2)
|
---|
548 | SB.s_zones = G.total_blocks;
|
---|
549 | else
|
---|
550 | SB.s_nzones = G.total_blocks;
|
---|
551 |
|
---|
552 | /* some magic nrs: 1 inode / 3 blocks */
|
---|
553 | if (G.req_nr_inodes == 0)
|
---|
554 | inodes = G.total_blocks / 3;
|
---|
555 | else
|
---|
556 | inodes = G.req_nr_inodes;
|
---|
557 | /* Round up inode count to fill block size */
|
---|
558 | if (version2)
|
---|
559 | inodes = (inodes + MINIX2_INODES_PER_BLOCK - 1) &
|
---|
560 | ~(MINIX2_INODES_PER_BLOCK - 1);
|
---|
561 | else
|
---|
562 | inodes = (inodes + MINIX1_INODES_PER_BLOCK - 1) &
|
---|
563 | ~(MINIX1_INODES_PER_BLOCK - 1);
|
---|
564 | if (inodes > 65535)
|
---|
565 | inodes = 65535;
|
---|
566 | SB_INODES = inodes;
|
---|
567 | SB_IMAPS = div_roundup(SB_INODES + 1, BITS_PER_BLOCK);
|
---|
568 |
|
---|
569 | /* Real bad hack but overwise mkfs.minix can be thrown
|
---|
570 | * in infinite loop...
|
---|
571 | * try:
|
---|
572 | * dd if=/dev/zero of=test.fs count=10 bs=1024
|
---|
573 | * mkfs.minix -i 200 test.fs
|
---|
574 | */
|
---|
575 | /* This code is not insane: NORM_FIRSTZONE is not a constant,
|
---|
576 | * it is calculated from SB_INODES, SB_IMAPS and SB_ZMAPS */
|
---|
577 | i = 999;
|
---|
578 | SB_ZMAPS = 0;
|
---|
579 | do {
|
---|
580 | norm_firstzone = NORM_FIRSTZONE;
|
---|
581 | sb_zmaps = div_roundup(G.total_blocks - norm_firstzone + 1, BITS_PER_BLOCK);
|
---|
582 | if (SB_ZMAPS == sb_zmaps) goto got_it;
|
---|
583 | SB_ZMAPS = sb_zmaps;
|
---|
584 | /* new SB_ZMAPS, need to recalc NORM_FIRSTZONE */
|
---|
585 | } while (--i);
|
---|
586 | bb_error_msg_and_die("incompatible size/inode count, try different -i N");
|
---|
587 | got_it:
|
---|
588 |
|
---|
589 | SB_FIRSTZONE = norm_firstzone;
|
---|
590 | G.inode_map = xmalloc(SB_IMAPS * BLOCK_SIZE);
|
---|
591 | G.zone_map = xmalloc(SB_ZMAPS * BLOCK_SIZE);
|
---|
592 | memset(G.inode_map, 0xff, SB_IMAPS * BLOCK_SIZE);
|
---|
593 | memset(G.zone_map, 0xff, SB_ZMAPS * BLOCK_SIZE);
|
---|
594 | for (i = SB_FIRSTZONE; i < SB_ZONES; i++)
|
---|
595 | unmark_zone(i);
|
---|
596 | for (i = MINIX_ROOT_INO; i <= SB_INODES; i++)
|
---|
597 | unmark_inode(i);
|
---|
598 | G.inode_buffer = xzalloc(INODE_BUFFER_SIZE);
|
---|
599 | printf("%ld inodes\n", (long)SB_INODES);
|
---|
600 | printf("%ld blocks\n", (long)SB_ZONES);
|
---|
601 | printf("Firstdatazone=%ld (%ld)\n", (long)SB_FIRSTZONE, (long)norm_firstzone);
|
---|
602 | printf("Zonesize=%d\n", BLOCK_SIZE << SB_ZONE_SIZE);
|
---|
603 | printf("Maxsize=%ld\n", (long)SB_MAXSIZE);
|
---|
604 | }
|
---|
605 |
|
---|
606 | int mkfs_minix_main(int argc, char **argv);
|
---|
607 | int mkfs_minix_main(int argc, char **argv)
|
---|
608 | {
|
---|
609 | struct mntent *mp;
|
---|
610 | unsigned opt;
|
---|
611 | char *tmp;
|
---|
612 | struct stat statbuf;
|
---|
613 | char *str_i, *str_n;
|
---|
614 | char *listfile = NULL;
|
---|
615 |
|
---|
616 | PTR_TO_GLOBALS = xzalloc(sizeof(G));
|
---|
617 | /* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */
|
---|
618 | G.namelen = 30;
|
---|
619 | G.dirsize = 32;
|
---|
620 | G.magic = MINIX1_SUPER_MAGIC2;
|
---|
621 |
|
---|
622 | if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
623 | bb_error_msg_and_die("bad inode size");
|
---|
624 | #if ENABLE_FEATURE_MINIX2
|
---|
625 | if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
626 | bb_error_msg_and_die("bad inode size");
|
---|
627 | #endif
|
---|
628 |
|
---|
629 | opt = getopt32(argv, "ci:l:n:v", &str_i, &listfile, &str_n);
|
---|
630 | argv += optind;
|
---|
631 | //if (opt & 1) -c
|
---|
632 | if (opt & 2) G.req_nr_inodes = xatoul(str_i); // -i
|
---|
633 | //if (opt & 4) -l
|
---|
634 | if (opt & 8) { // -n
|
---|
635 | G.namelen = xatoi_u(str_n);
|
---|
636 | if (G.namelen == 14) G.magic = MINIX1_SUPER_MAGIC;
|
---|
637 | else if (G.namelen == 30) G.magic = MINIX1_SUPER_MAGIC2;
|
---|
638 | else bb_show_usage();
|
---|
639 | G.dirsize = G.namelen + 2;
|
---|
640 | }
|
---|
641 | if (opt & 0x10) { // -v
|
---|
642 | #if ENABLE_FEATURE_MINIX2
|
---|
643 | version2 = 1;
|
---|
644 | #else
|
---|
645 | bb_error_msg_and_die("not compiled with minix v2 support");
|
---|
646 | #endif
|
---|
647 | }
|
---|
648 |
|
---|
649 | G.device_name = *argv++;
|
---|
650 | if (!G.device_name)
|
---|
651 | bb_show_usage();
|
---|
652 | if (*argv)
|
---|
653 | G.total_blocks = xatou32(*argv);
|
---|
654 | else
|
---|
655 | G.total_blocks = get_size(G.device_name) / 1024;
|
---|
656 |
|
---|
657 | if (G.total_blocks < 10)
|
---|
658 | bb_error_msg_and_die("must have at least 10 blocks");
|
---|
659 |
|
---|
660 | if (version2) {
|
---|
661 | G.magic = MINIX2_SUPER_MAGIC2;
|
---|
662 | if (G.namelen == 14)
|
---|
663 | G.magic = MINIX2_SUPER_MAGIC;
|
---|
664 | } else if (G.total_blocks > 65535)
|
---|
665 | G.total_blocks = 65535;
|
---|
666 |
|
---|
667 | /* Check if it is mounted */
|
---|
668 | mp = find_mount_point(G.device_name, NULL);
|
---|
669 | if (mp && strcmp(G.device_name, mp->mnt_fsname) == 0)
|
---|
670 | bb_error_msg_and_die("%s is mounted on %s; "
|
---|
671 | "refusing to make a filesystem",
|
---|
672 | G.device_name, mp->mnt_dir);
|
---|
673 |
|
---|
674 | G.dev_fd = xopen(G.device_name, O_RDWR);
|
---|
675 | if (fstat(G.dev_fd, &statbuf) < 0)
|
---|
676 | bb_error_msg_and_die("cannot stat %s", G.device_name);
|
---|
677 | if (!S_ISBLK(statbuf.st_mode))
|
---|
678 | opt &= ~1; // clear -c (check)
|
---|
679 |
|
---|
680 | /* I don't know why someone has special code to prevent mkfs.minix
|
---|
681 | * on IDE devices. Why IDE but not SCSI, etc?... */
|
---|
682 | #if 0
|
---|
683 | else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
|
---|
684 | /* what is this? */
|
---|
685 | bb_error_msg_and_die("will not try "
|
---|
686 | "to make filesystem on '%s'", G.device_name);
|
---|
687 | #endif
|
---|
688 |
|
---|
689 | tmp = G.root_block;
|
---|
690 | *(short *) tmp = 1;
|
---|
691 | strcpy(tmp + 2, ".");
|
---|
692 | tmp += G.dirsize;
|
---|
693 | *(short *) tmp = 1;
|
---|
694 | strcpy(tmp + 2, "..");
|
---|
695 | tmp += G.dirsize;
|
---|
696 | *(short *) tmp = 2;
|
---|
697 | strcpy(tmp + 2, ".badblocks");
|
---|
698 |
|
---|
699 | setup_tables();
|
---|
700 |
|
---|
701 | if (opt & 1) // -c ?
|
---|
702 | check_blocks();
|
---|
703 | else if (listfile)
|
---|
704 | get_list_blocks(listfile);
|
---|
705 |
|
---|
706 | if (version2) {
|
---|
707 | make_root_inode2();
|
---|
708 | make_bad_inode2();
|
---|
709 | } else {
|
---|
710 | make_root_inode();
|
---|
711 | make_bad_inode();
|
---|
712 | }
|
---|
713 |
|
---|
714 | mark_good_blocks();
|
---|
715 | write_tables();
|
---|
716 | return 0;
|
---|
717 | }
|
---|