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 <stdio.h>
|
---|
66 | #include <time.h>
|
---|
67 | #include <unistd.h>
|
---|
68 | #include <string.h>
|
---|
69 | #include <signal.h>
|
---|
70 | #include <fcntl.h>
|
---|
71 | #include <ctype.h>
|
---|
72 | #include <stdlib.h>
|
---|
73 | #include <stdint.h>
|
---|
74 | #include <termios.h>
|
---|
75 | #include <sys/ioctl.h>
|
---|
76 | #include <sys/param.h>
|
---|
77 | #include <mntent.h>
|
---|
78 | #include "busybox.h"
|
---|
79 |
|
---|
80 | #define MINIX_ROOT_INO 1
|
---|
81 | #define MINIX_LINK_MAX 250
|
---|
82 | #define MINIX2_LINK_MAX 65530
|
---|
83 |
|
---|
84 | #define MINIX_I_MAP_SLOTS 8
|
---|
85 | #define MINIX_Z_MAP_SLOTS 64
|
---|
86 | #define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
|
---|
87 | #define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
|
---|
88 | #define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
|
---|
89 | #define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
|
---|
90 | #define MINIX_VALID_FS 0x0001 /* Clean fs. */
|
---|
91 | #define MINIX_ERROR_FS 0x0002 /* fs has errors. */
|
---|
92 |
|
---|
93 | #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
|
---|
94 | #define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode)))
|
---|
95 |
|
---|
96 | #define MINIX_V1 0x0001 /* original minix fs */
|
---|
97 | #define MINIX_V2 0x0002 /* minix V2 fs */
|
---|
98 |
|
---|
99 | #define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version
|
---|
100 |
|
---|
101 | /*
|
---|
102 | * This is the original minix inode layout on disk.
|
---|
103 | * Note the 8-bit gid and atime and ctime.
|
---|
104 | */
|
---|
105 | struct minix_inode {
|
---|
106 | uint16_t i_mode;
|
---|
107 | uint16_t i_uid;
|
---|
108 | uint32_t i_size;
|
---|
109 | uint32_t i_time;
|
---|
110 | uint8_t i_gid;
|
---|
111 | uint8_t i_nlinks;
|
---|
112 | uint16_t i_zone[9];
|
---|
113 | };
|
---|
114 |
|
---|
115 | /*
|
---|
116 | * The new minix inode has all the time entries, as well as
|
---|
117 | * long block numbers and a third indirect block (7+1+1+1
|
---|
118 | * instead of 7+1+1). Also, some previously 8-bit values are
|
---|
119 | * now 16-bit. The inode is now 64 bytes instead of 32.
|
---|
120 | */
|
---|
121 | struct minix2_inode {
|
---|
122 | uint16_t i_mode;
|
---|
123 | uint16_t i_nlinks;
|
---|
124 | uint16_t i_uid;
|
---|
125 | uint16_t i_gid;
|
---|
126 | uint32_t i_size;
|
---|
127 | uint32_t i_atime;
|
---|
128 | uint32_t i_mtime;
|
---|
129 | uint32_t i_ctime;
|
---|
130 | uint32_t i_zone[10];
|
---|
131 | };
|
---|
132 |
|
---|
133 | /*
|
---|
134 | * minix super-block data on disk
|
---|
135 | */
|
---|
136 | struct minix_super_block {
|
---|
137 | uint16_t s_ninodes;
|
---|
138 | uint16_t s_nzones;
|
---|
139 | uint16_t s_imap_blocks;
|
---|
140 | uint16_t s_zmap_blocks;
|
---|
141 | uint16_t s_firstdatazone;
|
---|
142 | uint16_t s_log_zone_size;
|
---|
143 | uint32_t s_max_size;
|
---|
144 | uint16_t s_magic;
|
---|
145 | uint16_t s_state;
|
---|
146 | uint32_t s_zones;
|
---|
147 | };
|
---|
148 |
|
---|
149 | struct minix_dir_entry {
|
---|
150 | uint16_t inode;
|
---|
151 | char name[0];
|
---|
152 | };
|
---|
153 |
|
---|
154 | #define NAME_MAX 255 /* # chars in a file name */
|
---|
155 |
|
---|
156 | #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
|
---|
157 |
|
---|
158 | #define MINIX_VALID_FS 0x0001 /* Clean fs. */
|
---|
159 | #define MINIX_ERROR_FS 0x0002 /* fs has errors. */
|
---|
160 |
|
---|
161 | #define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
|
---|
162 | #define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
|
---|
163 |
|
---|
164 | #ifndef BLKGETSIZE
|
---|
165 | #define BLKGETSIZE _IO(0x12,96) /* return device size */
|
---|
166 | #endif
|
---|
167 |
|
---|
168 |
|
---|
169 | #ifndef __linux__
|
---|
170 | #define volatile
|
---|
171 | #endif
|
---|
172 |
|
---|
173 | #define MINIX_ROOT_INO 1
|
---|
174 | #define MINIX_BAD_INO 2
|
---|
175 |
|
---|
176 | #define TEST_BUFFER_BLOCKS 16
|
---|
177 | #define MAX_GOOD_BLOCKS 512
|
---|
178 |
|
---|
179 | #define UPPER(size,n) (((size)+((n)-1))/(n))
|
---|
180 | #define INODE_SIZE (sizeof(struct minix_inode))
|
---|
181 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
182 | #define INODE_SIZE2 (sizeof(struct minix2_inode))
|
---|
183 | #define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
|
---|
184 | : MINIX_INODES_PER_BLOCK))
|
---|
185 | #else
|
---|
186 | #define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
|
---|
187 | #endif
|
---|
188 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
|
---|
189 |
|
---|
190 | #define BITS_PER_BLOCK (BLOCK_SIZE<<3)
|
---|
191 |
|
---|
192 | static char *device_name;
|
---|
193 | static int DEV = -1;
|
---|
194 | static uint32_t BLOCKS;
|
---|
195 | static int check;
|
---|
196 | static int badblocks;
|
---|
197 | static int namelen = 30; /* default (changed to 30, per Linus's
|
---|
198 |
|
---|
199 | suggestion, Sun Nov 21 08:05:07 1993) */
|
---|
200 | static int dirsize = 32;
|
---|
201 | static int magic = MINIX_SUPER_MAGIC2;
|
---|
202 | static int version2;
|
---|
203 |
|
---|
204 | static char root_block[BLOCK_SIZE];
|
---|
205 |
|
---|
206 | static char *inode_buffer;
|
---|
207 |
|
---|
208 | #define Inode (((struct minix_inode *) inode_buffer)-1)
|
---|
209 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
210 | #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
|
---|
211 | #endif
|
---|
212 | static char super_block_buffer[BLOCK_SIZE];
|
---|
213 | static char boot_block_buffer[512];
|
---|
214 |
|
---|
215 | #define Super (*(struct minix_super_block *)super_block_buffer)
|
---|
216 | #define INODES (Super.s_ninodes)
|
---|
217 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
218 | #define ZONES (version2 ? Super.s_zones : Super.s_nzones)
|
---|
219 | #else
|
---|
220 | #define ZONES (Super.s_nzones)
|
---|
221 | #endif
|
---|
222 | #define IMAPS (Super.s_imap_blocks)
|
---|
223 | #define ZMAPS (Super.s_zmap_blocks)
|
---|
224 | #define FIRSTZONE (Super.s_firstdatazone)
|
---|
225 | #define ZONESIZE (Super.s_log_zone_size)
|
---|
226 | #define MAXSIZE (Super.s_max_size)
|
---|
227 | #define MAGIC (Super.s_magic)
|
---|
228 | #define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
|
---|
229 |
|
---|
230 | static char *inode_map;
|
---|
231 | static char *zone_map;
|
---|
232 |
|
---|
233 | static unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
|
---|
234 | static int used_good_blocks;
|
---|
235 | static unsigned long req_nr_inodes;
|
---|
236 |
|
---|
237 | static inline int bit(char * a,unsigned int i)
|
---|
238 | {
|
---|
239 | return (a[i >> 3] & (1<<(i & 7))) != 0;
|
---|
240 | }
|
---|
241 | #define inode_in_use(x) (bit(inode_map,(x)))
|
---|
242 | #define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
|
---|
243 |
|
---|
244 | #define mark_inode(x) (setbit(inode_map,(x)))
|
---|
245 | #define unmark_inode(x) (clrbit(inode_map,(x)))
|
---|
246 |
|
---|
247 | #define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1))
|
---|
248 | #define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1))
|
---|
249 |
|
---|
250 | /*
|
---|
251 | * Check to make certain that our new filesystem won't be created on
|
---|
252 | * an already mounted partition. Code adapted from mke2fs, Copyright
|
---|
253 | * (C) 1994 Theodore Ts'o. Also licensed under GPL.
|
---|
254 | */
|
---|
255 | static inline void check_mount(void)
|
---|
256 | {
|
---|
257 | FILE *f;
|
---|
258 | struct mntent *mnt;
|
---|
259 |
|
---|
260 | if ((f = setmntent(MOUNTED, "r")) == NULL)
|
---|
261 | return;
|
---|
262 | while ((mnt = getmntent(f)) != NULL)
|
---|
263 | if (strcmp(device_name, mnt->mnt_fsname) == 0)
|
---|
264 | break;
|
---|
265 | endmntent(f);
|
---|
266 | if (!mnt)
|
---|
267 | return;
|
---|
268 |
|
---|
269 | bb_error_msg_and_die("%s is mounted; will not make a filesystem here!", device_name);
|
---|
270 | }
|
---|
271 |
|
---|
272 | static long valid_offset(int fd, int offset)
|
---|
273 | {
|
---|
274 | char ch;
|
---|
275 |
|
---|
276 | if (lseek(fd, offset, 0) < 0)
|
---|
277 | return 0;
|
---|
278 | if (read(fd, &ch, 1) < 1)
|
---|
279 | return 0;
|
---|
280 | return 1;
|
---|
281 | }
|
---|
282 |
|
---|
283 | static inline int count_blocks(int fd)
|
---|
284 | {
|
---|
285 | int high, low;
|
---|
286 |
|
---|
287 | low = 0;
|
---|
288 | for (high = 1; valid_offset(fd, high); high *= 2)
|
---|
289 | low = high;
|
---|
290 | while (low < high - 1) {
|
---|
291 | const int mid = (low + high) / 2;
|
---|
292 |
|
---|
293 | if (valid_offset(fd, mid))
|
---|
294 | low = mid;
|
---|
295 | else
|
---|
296 | high = mid;
|
---|
297 | }
|
---|
298 | valid_offset(fd, 0);
|
---|
299 | return (low + 1);
|
---|
300 | }
|
---|
301 |
|
---|
302 | static inline int get_size(const char *file)
|
---|
303 | {
|
---|
304 | int fd;
|
---|
305 | long size;
|
---|
306 |
|
---|
307 | fd = bb_xopen3(file, O_RDWR, 0);
|
---|
308 | if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
|
---|
309 | close(fd);
|
---|
310 | return (size * 512);
|
---|
311 | }
|
---|
312 |
|
---|
313 | size = count_blocks(fd);
|
---|
314 | close(fd);
|
---|
315 | return size;
|
---|
316 | }
|
---|
317 |
|
---|
318 | static inline void write_tables(void)
|
---|
319 | {
|
---|
320 | /* Mark the super block valid. */
|
---|
321 | Super.s_state |= MINIX_VALID_FS;
|
---|
322 | Super.s_state &= ~MINIX_ERROR_FS;
|
---|
323 |
|
---|
324 | if (lseek(DEV, 0, SEEK_SET))
|
---|
325 | bb_error_msg_and_die("seek to boot block failed in write_tables");
|
---|
326 | if (512 != write(DEV, boot_block_buffer, 512))
|
---|
327 | bb_error_msg_and_die("unable to clear boot sector");
|
---|
328 | if (BLOCK_SIZE != lseek(DEV, BLOCK_SIZE, SEEK_SET))
|
---|
329 | bb_error_msg_and_die("seek failed in write_tables");
|
---|
330 | if (BLOCK_SIZE != write(DEV, super_block_buffer, BLOCK_SIZE))
|
---|
331 | bb_error_msg_and_die("unable to write super-block");
|
---|
332 | if (IMAPS * BLOCK_SIZE != write(DEV, inode_map, IMAPS * BLOCK_SIZE))
|
---|
333 | bb_error_msg_and_die("unable to write inode map");
|
---|
334 | if (ZMAPS * BLOCK_SIZE != write(DEV, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
335 | bb_error_msg_and_die("unable to write zone map");
|
---|
336 | if (INODE_BUFFER_SIZE != write(DEV, inode_buffer, INODE_BUFFER_SIZE))
|
---|
337 | bb_error_msg_and_die("unable to write inodes");
|
---|
338 |
|
---|
339 | }
|
---|
340 |
|
---|
341 | static void write_block(int blk, char *buffer)
|
---|
342 | {
|
---|
343 | if (blk * BLOCK_SIZE != lseek(DEV, blk * BLOCK_SIZE, SEEK_SET))
|
---|
344 | bb_error_msg_and_die("seek failed in write_block");
|
---|
345 | if (BLOCK_SIZE != write(DEV, buffer, BLOCK_SIZE))
|
---|
346 | bb_error_msg_and_die("write failed in write_block");
|
---|
347 | }
|
---|
348 |
|
---|
349 | static int get_free_block(void)
|
---|
350 | {
|
---|
351 | int blk;
|
---|
352 |
|
---|
353 | if (used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
|
---|
354 | bb_error_msg_and_die("too many bad blocks");
|
---|
355 | if (used_good_blocks)
|
---|
356 | blk = good_blocks_table[used_good_blocks - 1] + 1;
|
---|
357 | else
|
---|
358 | blk = FIRSTZONE;
|
---|
359 | while (blk < ZONES && zone_in_use(blk))
|
---|
360 | blk++;
|
---|
361 | if (blk >= ZONES)
|
---|
362 | bb_error_msg_and_die("not enough good blocks");
|
---|
363 | good_blocks_table[used_good_blocks] = blk;
|
---|
364 | used_good_blocks++;
|
---|
365 | return blk;
|
---|
366 | }
|
---|
367 |
|
---|
368 | static inline void mark_good_blocks(void)
|
---|
369 | {
|
---|
370 | int blk;
|
---|
371 |
|
---|
372 | for (blk = 0; blk < used_good_blocks; blk++)
|
---|
373 | mark_zone(good_blocks_table[blk]);
|
---|
374 | }
|
---|
375 |
|
---|
376 | static int next(int zone)
|
---|
377 | {
|
---|
378 | if (!zone)
|
---|
379 | zone = FIRSTZONE - 1;
|
---|
380 | while (++zone < ZONES)
|
---|
381 | if (zone_in_use(zone))
|
---|
382 | return zone;
|
---|
383 | return 0;
|
---|
384 | }
|
---|
385 |
|
---|
386 | static inline void make_bad_inode(void)
|
---|
387 | {
|
---|
388 | struct minix_inode *inode = &Inode[MINIX_BAD_INO];
|
---|
389 | int i, j, zone;
|
---|
390 | int ind = 0, dind = 0;
|
---|
391 | unsigned short ind_block[BLOCK_SIZE >> 1];
|
---|
392 | unsigned short dind_block[BLOCK_SIZE >> 1];
|
---|
393 |
|
---|
394 | #define NEXT_BAD (zone = next(zone))
|
---|
395 |
|
---|
396 | if (!badblocks)
|
---|
397 | return;
|
---|
398 | mark_inode(MINIX_BAD_INO);
|
---|
399 | inode->i_nlinks = 1;
|
---|
400 | inode->i_time = time(NULL);
|
---|
401 | inode->i_mode = S_IFREG + 0000;
|
---|
402 | inode->i_size = badblocks * BLOCK_SIZE;
|
---|
403 | zone = next(0);
|
---|
404 | for (i = 0; i < 7; i++) {
|
---|
405 | inode->i_zone[i] = zone;
|
---|
406 | if (!NEXT_BAD)
|
---|
407 | goto end_bad;
|
---|
408 | }
|
---|
409 | inode->i_zone[7] = ind = get_free_block();
|
---|
410 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
411 | for (i = 0; i < 512; i++) {
|
---|
412 | ind_block[i] = zone;
|
---|
413 | if (!NEXT_BAD)
|
---|
414 | goto end_bad;
|
---|
415 | }
|
---|
416 | inode->i_zone[8] = dind = get_free_block();
|
---|
417 | memset(dind_block, 0, BLOCK_SIZE);
|
---|
418 | for (i = 0; i < 512; i++) {
|
---|
419 | write_block(ind, (char *) ind_block);
|
---|
420 | dind_block[i] = ind = get_free_block();
|
---|
421 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
422 | for (j = 0; j < 512; j++) {
|
---|
423 | ind_block[j] = zone;
|
---|
424 | if (!NEXT_BAD)
|
---|
425 | goto end_bad;
|
---|
426 | }
|
---|
427 | }
|
---|
428 | bb_error_msg_and_die("too many bad blocks");
|
---|
429 | end_bad:
|
---|
430 | if (ind)
|
---|
431 | write_block(ind, (char *) ind_block);
|
---|
432 | if (dind)
|
---|
433 | write_block(dind, (char *) dind_block);
|
---|
434 | }
|
---|
435 |
|
---|
436 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
437 | static inline void make_bad_inode2(void)
|
---|
438 | {
|
---|
439 | struct minix2_inode *inode = &Inode2[MINIX_BAD_INO];
|
---|
440 | int i, j, zone;
|
---|
441 | int ind = 0, dind = 0;
|
---|
442 | unsigned long ind_block[BLOCK_SIZE >> 2];
|
---|
443 | unsigned long dind_block[BLOCK_SIZE >> 2];
|
---|
444 |
|
---|
445 | if (!badblocks)
|
---|
446 | return;
|
---|
447 | mark_inode(MINIX_BAD_INO);
|
---|
448 | inode->i_nlinks = 1;
|
---|
449 | inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL);
|
---|
450 | inode->i_mode = S_IFREG + 0000;
|
---|
451 | inode->i_size = badblocks * BLOCK_SIZE;
|
---|
452 | zone = next(0);
|
---|
453 | for (i = 0; i < 7; i++) {
|
---|
454 | inode->i_zone[i] = zone;
|
---|
455 | if (!NEXT_BAD)
|
---|
456 | goto end_bad;
|
---|
457 | }
|
---|
458 | inode->i_zone[7] = ind = get_free_block();
|
---|
459 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
460 | for (i = 0; i < 256; i++) {
|
---|
461 | ind_block[i] = zone;
|
---|
462 | if (!NEXT_BAD)
|
---|
463 | goto end_bad;
|
---|
464 | }
|
---|
465 | inode->i_zone[8] = dind = get_free_block();
|
---|
466 | memset(dind_block, 0, BLOCK_SIZE);
|
---|
467 | for (i = 0; i < 256; i++) {
|
---|
468 | write_block(ind, (char *) ind_block);
|
---|
469 | dind_block[i] = ind = get_free_block();
|
---|
470 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
471 | for (j = 0; j < 256; j++) {
|
---|
472 | ind_block[j] = zone;
|
---|
473 | if (!NEXT_BAD)
|
---|
474 | goto end_bad;
|
---|
475 | }
|
---|
476 | }
|
---|
477 | /* Could make triple indirect block here */
|
---|
478 | bb_error_msg_and_die("too many bad blocks");
|
---|
479 | end_bad:
|
---|
480 | if (ind)
|
---|
481 | write_block(ind, (char *) ind_block);
|
---|
482 | if (dind)
|
---|
483 | write_block(dind, (char *) dind_block);
|
---|
484 | }
|
---|
485 | #endif
|
---|
486 |
|
---|
487 | static inline void make_root_inode(void)
|
---|
488 | {
|
---|
489 | struct minix_inode *inode = &Inode[MINIX_ROOT_INO];
|
---|
490 |
|
---|
491 | mark_inode(MINIX_ROOT_INO);
|
---|
492 | inode->i_zone[0] = get_free_block();
|
---|
493 | inode->i_nlinks = 2;
|
---|
494 | inode->i_time = time(NULL);
|
---|
495 | if (badblocks)
|
---|
496 | inode->i_size = 3 * dirsize;
|
---|
497 | else {
|
---|
498 | root_block[2 * dirsize] = '\0';
|
---|
499 | root_block[2 * dirsize + 1] = '\0';
|
---|
500 | inode->i_size = 2 * dirsize;
|
---|
501 | }
|
---|
502 | inode->i_mode = S_IFDIR + 0755;
|
---|
503 | inode->i_uid = getuid();
|
---|
504 | if (inode->i_uid)
|
---|
505 | inode->i_gid = getgid();
|
---|
506 | write_block(inode->i_zone[0], root_block);
|
---|
507 | }
|
---|
508 |
|
---|
509 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
510 | static inline void make_root_inode2(void)
|
---|
511 | {
|
---|
512 | struct minix2_inode *inode = &Inode2[MINIX_ROOT_INO];
|
---|
513 |
|
---|
514 | mark_inode(MINIX_ROOT_INO);
|
---|
515 | inode->i_zone[0] = get_free_block();
|
---|
516 | inode->i_nlinks = 2;
|
---|
517 | inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL);
|
---|
518 | if (badblocks)
|
---|
519 | inode->i_size = 3 * dirsize;
|
---|
520 | else {
|
---|
521 | root_block[2 * dirsize] = '\0';
|
---|
522 | root_block[2 * dirsize + 1] = '\0';
|
---|
523 | inode->i_size = 2 * dirsize;
|
---|
524 | }
|
---|
525 | inode->i_mode = S_IFDIR + 0755;
|
---|
526 | inode->i_uid = getuid();
|
---|
527 | if (inode->i_uid)
|
---|
528 | inode->i_gid = getgid();
|
---|
529 | write_block(inode->i_zone[0], root_block);
|
---|
530 | }
|
---|
531 | #endif
|
---|
532 |
|
---|
533 | static inline void setup_tables(void)
|
---|
534 | {
|
---|
535 | int i;
|
---|
536 | unsigned long inodes;
|
---|
537 |
|
---|
538 | memset(super_block_buffer, 0, BLOCK_SIZE);
|
---|
539 | memset(boot_block_buffer, 0, 512);
|
---|
540 | MAGIC = magic;
|
---|
541 | ZONESIZE = 0;
|
---|
542 | MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
|
---|
543 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
544 | if (version2) {
|
---|
545 | Super.s_zones = BLOCKS;
|
---|
546 | } else
|
---|
547 | #endif
|
---|
548 | Super.s_nzones = BLOCKS;
|
---|
549 |
|
---|
550 | /* some magic nrs: 1 inode / 3 blocks */
|
---|
551 | if (req_nr_inodes == 0)
|
---|
552 | inodes = BLOCKS / 3;
|
---|
553 | else
|
---|
554 | inodes = req_nr_inodes;
|
---|
555 | /* Round up inode count to fill block size */
|
---|
556 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
557 | if (version2)
|
---|
558 | inodes = ((inodes + MINIX2_INODES_PER_BLOCK - 1) &
|
---|
559 | ~(MINIX2_INODES_PER_BLOCK - 1));
|
---|
560 | else
|
---|
561 | #endif
|
---|
562 | inodes = ((inodes + MINIX_INODES_PER_BLOCK - 1) &
|
---|
563 | ~(MINIX_INODES_PER_BLOCK - 1));
|
---|
564 | if (inodes > 65535)
|
---|
565 | inodes = 65535;
|
---|
566 | INODES = inodes;
|
---|
567 | IMAPS = UPPER(INODES + 1, BITS_PER_BLOCK);
|
---|
568 | ZMAPS = 0;
|
---|
569 | i = 0;
|
---|
570 | while (ZMAPS !=
|
---|
571 | UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1,
|
---|
572 | BITS_PER_BLOCK) && i < 1000) {
|
---|
573 | ZMAPS =
|
---|
574 | UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1,
|
---|
575 | BITS_PER_BLOCK);
|
---|
576 | i++;
|
---|
577 | }
|
---|
578 | /* Real bad hack but overwise mkfs.minix can be thrown
|
---|
579 | * in infinite loop...
|
---|
580 | * try:
|
---|
581 | * dd if=/dev/zero of=test.fs count=10 bs=1024
|
---|
582 | * /sbin/mkfs.minix -i 200 test.fs
|
---|
583 | * */
|
---|
584 | if (i >= 999) {
|
---|
585 | bb_error_msg_and_die("unable to allocate buffers for maps");
|
---|
586 | }
|
---|
587 | FIRSTZONE = NORM_FIRSTZONE;
|
---|
588 | inode_map = xmalloc(IMAPS * BLOCK_SIZE);
|
---|
589 | zone_map = xmalloc(ZMAPS * BLOCK_SIZE);
|
---|
590 | memset(inode_map, 0xff, IMAPS * BLOCK_SIZE);
|
---|
591 | memset(zone_map, 0xff, ZMAPS * BLOCK_SIZE);
|
---|
592 | for (i = FIRSTZONE; i < ZONES; i++)
|
---|
593 | unmark_zone(i);
|
---|
594 | for (i = MINIX_ROOT_INO; i <= INODES; i++)
|
---|
595 | unmark_inode(i);
|
---|
596 | inode_buffer = xmalloc(INODE_BUFFER_SIZE);
|
---|
597 | memset(inode_buffer, 0, INODE_BUFFER_SIZE);
|
---|
598 | printf("%ld inodes\n", (long)INODES);
|
---|
599 | printf("%ld blocks\n", (long)ZONES);
|
---|
600 | printf("Firstdatazone=%ld (%ld)\n", (long)FIRSTZONE, (long)NORM_FIRSTZONE);
|
---|
601 | printf("Zonesize=%d\n", BLOCK_SIZE << ZONESIZE);
|
---|
602 | printf("Maxsize=%ld\n\n", (long)MAXSIZE);
|
---|
603 | }
|
---|
604 |
|
---|
605 | /*
|
---|
606 | * Perform a test of a block; return the number of
|
---|
607 | * blocks readable/writable.
|
---|
608 | */
|
---|
609 | static inline long do_check(char *buffer, int try, unsigned int current_block)
|
---|
610 | {
|
---|
611 | long got;
|
---|
612 |
|
---|
613 | /* Seek to the correct loc. */
|
---|
614 | if (lseek(DEV, current_block * BLOCK_SIZE, SEEK_SET) !=
|
---|
615 | current_block * BLOCK_SIZE) {
|
---|
616 | bb_error_msg_and_die("seek failed during testing of blocks");
|
---|
617 | }
|
---|
618 |
|
---|
619 |
|
---|
620 | /* Try the read */
|
---|
621 | got = read(DEV, buffer, try * BLOCK_SIZE);
|
---|
622 | if (got < 0)
|
---|
623 | got = 0;
|
---|
624 | if (got & (BLOCK_SIZE - 1)) {
|
---|
625 | printf("Weird values in do_check: probably bugs\n");
|
---|
626 | }
|
---|
627 | got /= BLOCK_SIZE;
|
---|
628 | return got;
|
---|
629 | }
|
---|
630 |
|
---|
631 | static unsigned int currently_testing;
|
---|
632 |
|
---|
633 | static void alarm_intr(int alnum)
|
---|
634 | {
|
---|
635 | if (currently_testing >= ZONES)
|
---|
636 | return;
|
---|
637 | signal(SIGALRM, alarm_intr);
|
---|
638 | alarm(5);
|
---|
639 | if (!currently_testing)
|
---|
640 | return;
|
---|
641 | printf("%d ...", currently_testing);
|
---|
642 | fflush(stdout);
|
---|
643 | }
|
---|
644 |
|
---|
645 | static void check_blocks(void)
|
---|
646 | {
|
---|
647 | int try, got;
|
---|
648 | static char buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
|
---|
649 |
|
---|
650 | currently_testing = 0;
|
---|
651 | signal(SIGALRM, alarm_intr);
|
---|
652 | alarm(5);
|
---|
653 | while (currently_testing < ZONES) {
|
---|
654 | if (lseek(DEV, currently_testing * BLOCK_SIZE, SEEK_SET) !=
|
---|
655 | currently_testing * BLOCK_SIZE)
|
---|
656 | bb_error_msg_and_die("seek failed in check_blocks");
|
---|
657 | try = TEST_BUFFER_BLOCKS;
|
---|
658 | if (currently_testing + try > ZONES)
|
---|
659 | try = ZONES - currently_testing;
|
---|
660 | got = do_check(buffer, try, currently_testing);
|
---|
661 | currently_testing += got;
|
---|
662 | if (got == try)
|
---|
663 | continue;
|
---|
664 | if (currently_testing < FIRSTZONE)
|
---|
665 | bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
|
---|
666 | mark_zone(currently_testing);
|
---|
667 | badblocks++;
|
---|
668 | currently_testing++;
|
---|
669 | }
|
---|
670 | if (badblocks > 1)
|
---|
671 | printf("%d bad blocks\n", badblocks);
|
---|
672 | else if (badblocks == 1)
|
---|
673 | printf("one bad block\n");
|
---|
674 | }
|
---|
675 |
|
---|
676 | static void get_list_blocks(char *filename)
|
---|
677 | {
|
---|
678 | FILE *listfile;
|
---|
679 | unsigned long blockno;
|
---|
680 |
|
---|
681 | listfile = bb_xfopen(filename, "r");
|
---|
682 | while (!feof(listfile)) {
|
---|
683 | fscanf(listfile, "%ld\n", &blockno);
|
---|
684 | mark_zone(blockno);
|
---|
685 | badblocks++;
|
---|
686 | }
|
---|
687 | if (badblocks > 1)
|
---|
688 | printf("%d bad blocks\n", badblocks);
|
---|
689 | else if (badblocks == 1)
|
---|
690 | printf("one bad block\n");
|
---|
691 | }
|
---|
692 |
|
---|
693 | int mkfs_minix_main(int argc, char **argv)
|
---|
694 | {
|
---|
695 | int i=1;
|
---|
696 | char *tmp;
|
---|
697 | struct stat statbuf;
|
---|
698 | char *listfile = NULL;
|
---|
699 | int stopIt=FALSE;
|
---|
700 |
|
---|
701 | if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
702 | bb_error_msg_and_die("bad inode size");
|
---|
703 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
704 | if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
705 | bb_error_msg_and_die("bad inode size");
|
---|
706 | #endif
|
---|
707 |
|
---|
708 | /* Parse options */
|
---|
709 | argv++;
|
---|
710 | while (--argc >= 0 && *argv && **argv) {
|
---|
711 | if (**argv == '-') {
|
---|
712 | stopIt=FALSE;
|
---|
713 | while (i > 0 && *++(*argv) && stopIt==FALSE) {
|
---|
714 | switch (**argv) {
|
---|
715 | case 'c':
|
---|
716 | check = 1;
|
---|
717 | break;
|
---|
718 | case 'i':
|
---|
719 | {
|
---|
720 | char *cp=NULL;
|
---|
721 | if (*(*argv+1) != 0) {
|
---|
722 | cp = ++(*argv);
|
---|
723 | } else {
|
---|
724 | if (--argc == 0) {
|
---|
725 | goto goodbye;
|
---|
726 | }
|
---|
727 | cp = *(++argv);
|
---|
728 | }
|
---|
729 | req_nr_inodes = strtoul(cp, &tmp, 0);
|
---|
730 | if (*tmp)
|
---|
731 | bb_show_usage();
|
---|
732 | stopIt=TRUE;
|
---|
733 | break;
|
---|
734 | }
|
---|
735 | case 'l':
|
---|
736 | if (--argc == 0) {
|
---|
737 | goto goodbye;
|
---|
738 | }
|
---|
739 | listfile = *(++argv);
|
---|
740 | break;
|
---|
741 | case 'n':
|
---|
742 | {
|
---|
743 | char *cp=NULL;
|
---|
744 |
|
---|
745 | if (*(*argv+1) != 0) {
|
---|
746 | cp = ++(*argv);
|
---|
747 | } else {
|
---|
748 | if (--argc == 0) {
|
---|
749 | goto goodbye;
|
---|
750 | }
|
---|
751 | cp = *(++argv);
|
---|
752 | }
|
---|
753 | i = strtoul(cp, &tmp, 0);
|
---|
754 | if (*tmp)
|
---|
755 | bb_show_usage();
|
---|
756 | if (i == 14)
|
---|
757 | magic = MINIX_SUPER_MAGIC;
|
---|
758 | else if (i == 30)
|
---|
759 | magic = MINIX_SUPER_MAGIC2;
|
---|
760 | else
|
---|
761 | bb_show_usage();
|
---|
762 | namelen = i;
|
---|
763 | dirsize = i + 2;
|
---|
764 | stopIt=TRUE;
|
---|
765 | break;
|
---|
766 | }
|
---|
767 | case 'v':
|
---|
768 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
769 | version2 = 1;
|
---|
770 | #else
|
---|
771 | bb_error_msg("%s: not compiled with minix v2 support",
|
---|
772 | device_name);
|
---|
773 | exit(-1);
|
---|
774 | #endif
|
---|
775 | break;
|
---|
776 | case '-':
|
---|
777 | case 'h':
|
---|
778 | default:
|
---|
779 | goodbye:
|
---|
780 | bb_show_usage();
|
---|
781 | }
|
---|
782 | }
|
---|
783 | } else {
|
---|
784 | if (device_name == NULL)
|
---|
785 | device_name = *argv;
|
---|
786 | else if (BLOCKS == 0)
|
---|
787 | BLOCKS = strtol(*argv, &tmp, 0);
|
---|
788 | else {
|
---|
789 | goto goodbye;
|
---|
790 | }
|
---|
791 | }
|
---|
792 | argv++;
|
---|
793 | }
|
---|
794 |
|
---|
795 | if (device_name && !BLOCKS)
|
---|
796 | BLOCKS = get_size(device_name) / 1024;
|
---|
797 | if (!device_name || BLOCKS < 10) {
|
---|
798 | bb_show_usage();
|
---|
799 | }
|
---|
800 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
801 | if (version2) {
|
---|
802 | if (namelen == 14)
|
---|
803 | magic = MINIX2_SUPER_MAGIC;
|
---|
804 | else
|
---|
805 | magic = MINIX2_SUPER_MAGIC2;
|
---|
806 | } else
|
---|
807 | #endif
|
---|
808 | if (BLOCKS > 65535)
|
---|
809 | BLOCKS = 65535;
|
---|
810 | check_mount(); /* is it already mounted? */
|
---|
811 | tmp = root_block;
|
---|
812 | *(short *) tmp = 1;
|
---|
813 | strcpy(tmp + 2, ".");
|
---|
814 | tmp += dirsize;
|
---|
815 | *(short *) tmp = 1;
|
---|
816 | strcpy(tmp + 2, "..");
|
---|
817 | tmp += dirsize;
|
---|
818 | *(short *) tmp = 2;
|
---|
819 | strcpy(tmp + 2, ".badblocks");
|
---|
820 | DEV = bb_xopen3(device_name, O_RDWR, 0);
|
---|
821 | if (fstat(DEV, &statbuf) < 0)
|
---|
822 | bb_error_msg_and_die("unable to stat %s", device_name);
|
---|
823 | if (!S_ISBLK(statbuf.st_mode))
|
---|
824 | check = 0;
|
---|
825 | else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
|
---|
826 | bb_error_msg_and_die("will not try to make filesystem on '%s'", device_name);
|
---|
827 | setup_tables();
|
---|
828 | if (check)
|
---|
829 | check_blocks();
|
---|
830 | else if (listfile)
|
---|
831 | get_list_blocks(listfile);
|
---|
832 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
833 | if (version2) {
|
---|
834 | make_root_inode2();
|
---|
835 | make_bad_inode2();
|
---|
836 | } else
|
---|
837 | #endif
|
---|
838 | {
|
---|
839 | make_root_inode();
|
---|
840 | make_bad_inode();
|
---|
841 | }
|
---|
842 | mark_good_blocks();
|
---|
843 | write_tables();
|
---|
844 | return 0;
|
---|
845 |
|
---|
846 | }
|
---|