1 | /* vi: set sw=4 ts=4: */
|
---|
2 | /*
|
---|
3 | * fsck.c - a file system consistency checker for Linux.
|
---|
4 | *
|
---|
5 | * (C) 1991, 1992 Linus Torvalds.
|
---|
6 | *
|
---|
7 | * Licensed under GPLv2, see file LICENSE in this source tree.
|
---|
8 | */
|
---|
9 |
|
---|
10 | /*
|
---|
11 | * 09.11.91 - made the first rudimentary functions
|
---|
12 | *
|
---|
13 | * 10.11.91 - updated, does checking, no repairs yet.
|
---|
14 | * Sent out to the mailing-list for testing.
|
---|
15 | *
|
---|
16 | * 14.11.91 - Testing seems to have gone well. Added some
|
---|
17 | * correction-code, and changed some functions.
|
---|
18 | *
|
---|
19 | * 15.11.91 - More correction code. Hopefully it notices most
|
---|
20 | * cases now, and tries to do something about them.
|
---|
21 | *
|
---|
22 | * 16.11.91 - More corrections (thanks to Mika Jalava). Most
|
---|
23 | * things seem to work now. Yeah, sure.
|
---|
24 | *
|
---|
25 | *
|
---|
26 | * 19.04.92 - Had to start over again from this old version, as a
|
---|
27 | * kernel bug ate my enhanced fsck in february.
|
---|
28 | *
|
---|
29 | * 28.02.93 - added support for different directory entry sizes..
|
---|
30 | *
|
---|
31 | * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
|
---|
32 | * superblock information
|
---|
33 | *
|
---|
34 | * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
|
---|
35 | * to that required by fsutil
|
---|
36 | *
|
---|
37 | * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
|
---|
38 | * Added support for file system valid flag. Also
|
---|
39 | * added program_version variable and output of
|
---|
40 | * program name and version number when program
|
---|
41 | * is executed.
|
---|
42 | *
|
---|
43 | * 30.10.94 - added support for v2 filesystem
|
---|
44 | * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
|
---|
45 | *
|
---|
46 | * 10.12.94 - added test to prevent checking of mounted fs adapted
|
---|
47 | * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
|
---|
48 | * program. (Daniel Quinlan, quinlan@yggdrasil.com)
|
---|
49 | *
|
---|
50 | * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
|
---|
51 | * for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
|
---|
52 | *
|
---|
53 | * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
|
---|
54 | * (Russell King). He made them for ARM. It would seem
|
---|
55 | * that the ARM is powerful enough to do this in C whereas
|
---|
56 | * i386 and m64k must use assembly to get it fast >:-)
|
---|
57 | * This should make minix fsck system-independent.
|
---|
58 | * (janl@math.uio.no, Nicolai Langfeldt)
|
---|
59 | *
|
---|
60 | * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler
|
---|
61 | * warnings. Added mc68k bitops from
|
---|
62 | * Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
|
---|
63 | *
|
---|
64 | * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
|
---|
65 | * Andreas Schwab.
|
---|
66 | *
|
---|
67 | * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org>
|
---|
68 | * - added Native Language Support
|
---|
69 | *
|
---|
70 | *
|
---|
71 | * I've had no time to add comments - hopefully the function names
|
---|
72 | * are comments enough. As with all file system checkers, this assumes
|
---|
73 | * the file system is quiescent - don't use it on a mounted device
|
---|
74 | * unless you can be sure nobody is writing to it (and remember that the
|
---|
75 | * kernel can write to it when it searches for files).
|
---|
76 | *
|
---|
77 | * Usage: fsck [-larvsm] device
|
---|
78 | * -l for a listing of all the filenames
|
---|
79 | * -a for automatic repairs (not implemented)
|
---|
80 | * -r for repairs (interactive) (not implemented)
|
---|
81 | * -v for verbose (tells how many files)
|
---|
82 | * -s for superblock info
|
---|
83 | * -m for minix-like "mode not cleared" warnings
|
---|
84 | * -f force filesystem check even if filesystem marked as valid
|
---|
85 | *
|
---|
86 | * The device may be a block device or a image of one, but this isn't
|
---|
87 | * enforced (but it's not much fun on a character device :-).
|
---|
88 | */
|
---|
89 |
|
---|
90 | #include <mntent.h>
|
---|
91 | #include "libbb.h"
|
---|
92 | #include "minix.h"
|
---|
93 |
|
---|
94 | #ifndef BLKGETSIZE
|
---|
95 | #define BLKGETSIZE _IO(0x12,96) /* return device size */
|
---|
96 | #endif
|
---|
97 |
|
---|
98 | struct BUG_bad_inode_size {
|
---|
99 | char BUG_bad_inode1_size[(INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
|
---|
100 | #if ENABLE_FEATURE_MINIX2
|
---|
101 | char BUG_bad_inode2_size[(INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
|
---|
102 | #endif
|
---|
103 | };
|
---|
104 |
|
---|
105 | enum {
|
---|
106 | #ifdef UNUSED
|
---|
107 | MINIX1_LINK_MAX = 250,
|
---|
108 | MINIX2_LINK_MAX = 65530,
|
---|
109 | MINIX_I_MAP_SLOTS = 8,
|
---|
110 | MINIX_Z_MAP_SLOTS = 64,
|
---|
111 | MINIX_V1 = 0x0001, /* original minix fs */
|
---|
112 | MINIX_V2 = 0x0002, /* minix V2 fs */
|
---|
113 | #endif
|
---|
114 | MINIX_NAME_MAX = 255, /* # chars in a file name */
|
---|
115 | };
|
---|
116 |
|
---|
117 |
|
---|
118 | #if !ENABLE_FEATURE_MINIX2
|
---|
119 | enum { version2 = 0 };
|
---|
120 | #endif
|
---|
121 |
|
---|
122 | enum { MAX_DEPTH = 32 };
|
---|
123 |
|
---|
124 | enum { dev_fd = 3 };
|
---|
125 |
|
---|
126 | struct globals {
|
---|
127 | #if ENABLE_FEATURE_MINIX2
|
---|
128 | smallint version2;
|
---|
129 | #endif
|
---|
130 | smallint changed; /* is filesystem modified? */
|
---|
131 | smallint errors_uncorrected; /* flag if some error was not corrected */
|
---|
132 | smallint termios_set;
|
---|
133 | smallint dirsize;
|
---|
134 | smallint namelen;
|
---|
135 | const char *device_name;
|
---|
136 | int directory, regular, blockdev, chardev, links, symlinks, total;
|
---|
137 | char *inode_buffer;
|
---|
138 |
|
---|
139 | char *inode_map;
|
---|
140 | char *zone_map;
|
---|
141 |
|
---|
142 | unsigned char *inode_count;
|
---|
143 | unsigned char *zone_count;
|
---|
144 |
|
---|
145 | /* File-name data */
|
---|
146 | int name_depth;
|
---|
147 | char *name_component[MAX_DEPTH+1];
|
---|
148 |
|
---|
149 | /* Bigger stuff */
|
---|
150 | struct termios sv_termios;
|
---|
151 | char superblock_buffer[BLOCK_SIZE];
|
---|
152 | char add_zone_ind_blk[BLOCK_SIZE];
|
---|
153 | char add_zone_dind_blk[BLOCK_SIZE];
|
---|
154 | IF_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];)
|
---|
155 | char check_file_blk[BLOCK_SIZE];
|
---|
156 |
|
---|
157 | /* File-name data */
|
---|
158 | char current_name[MAX_DEPTH * MINIX_NAME_MAX];
|
---|
159 | };
|
---|
160 | #define G (*ptr_to_globals)
|
---|
161 | #if ENABLE_FEATURE_MINIX2
|
---|
162 | #define version2 (G.version2 )
|
---|
163 | #endif
|
---|
164 | #define changed (G.changed )
|
---|
165 | #define errors_uncorrected (G.errors_uncorrected )
|
---|
166 | #define termios_set (G.termios_set )
|
---|
167 | #define dirsize (G.dirsize )
|
---|
168 | #define namelen (G.namelen )
|
---|
169 | #define device_name (G.device_name )
|
---|
170 | #define directory (G.directory )
|
---|
171 | #define regular (G.regular )
|
---|
172 | #define blockdev (G.blockdev )
|
---|
173 | #define chardev (G.chardev )
|
---|
174 | #define links (G.links )
|
---|
175 | #define symlinks (G.symlinks )
|
---|
176 | #define total (G.total )
|
---|
177 | #define inode_buffer (G.inode_buffer )
|
---|
178 | #define inode_map (G.inode_map )
|
---|
179 | #define zone_map (G.zone_map )
|
---|
180 | #define inode_count (G.inode_count )
|
---|
181 | #define zone_count (G.zone_count )
|
---|
182 | #define name_depth (G.name_depth )
|
---|
183 | #define name_component (G.name_component )
|
---|
184 | #define sv_termios (G.sv_termios )
|
---|
185 | #define superblock_buffer (G.superblock_buffer )
|
---|
186 | #define add_zone_ind_blk (G.add_zone_ind_blk )
|
---|
187 | #define add_zone_dind_blk (G.add_zone_dind_blk )
|
---|
188 | #define add_zone_tind_blk (G.add_zone_tind_blk )
|
---|
189 | #define check_file_blk (G.check_file_blk )
|
---|
190 | #define current_name (G.current_name )
|
---|
191 | #define INIT_G() do { \
|
---|
192 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
|
---|
193 | dirsize = 16; \
|
---|
194 | namelen = 14; \
|
---|
195 | current_name[0] = '/'; \
|
---|
196 | /*current_name[1] = '\0';*/ \
|
---|
197 | name_component[0] = ¤t_name[0]; \
|
---|
198 | } while (0)
|
---|
199 |
|
---|
200 |
|
---|
201 | #define OPTION_STR "larvsmf"
|
---|
202 | enum {
|
---|
203 | OPT_l = (1 << 0),
|
---|
204 | OPT_a = (1 << 1),
|
---|
205 | OPT_r = (1 << 2),
|
---|
206 | OPT_v = (1 << 3),
|
---|
207 | OPT_s = (1 << 4),
|
---|
208 | OPT_w = (1 << 5),
|
---|
209 | OPT_f = (1 << 6),
|
---|
210 | };
|
---|
211 | #define OPT_list (option_mask32 & OPT_l)
|
---|
212 | #define OPT_automatic (option_mask32 & OPT_a)
|
---|
213 | #define OPT_repair (option_mask32 & OPT_r)
|
---|
214 | #define OPT_verbose (option_mask32 & OPT_v)
|
---|
215 | #define OPT_show (option_mask32 & OPT_s)
|
---|
216 | #define OPT_warn_mode (option_mask32 & OPT_w)
|
---|
217 | #define OPT_force (option_mask32 & OPT_f)
|
---|
218 | /* non-automatic repairs requested? */
|
---|
219 | #define OPT_manual ((option_mask32 & (OPT_a|OPT_r)) == OPT_r)
|
---|
220 |
|
---|
221 |
|
---|
222 | #define Inode1 (((struct minix1_inode *) inode_buffer)-1)
|
---|
223 | #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
|
---|
224 |
|
---|
225 | #define Super (*(struct minix_superblock *)(superblock_buffer))
|
---|
226 |
|
---|
227 | #if ENABLE_FEATURE_MINIX2
|
---|
228 | # define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
|
---|
229 | #else
|
---|
230 | # define ZONES ((unsigned)(Super.s_nzones))
|
---|
231 | #endif
|
---|
232 | #define INODES ((unsigned)Super.s_ninodes)
|
---|
233 | #define IMAPS ((unsigned)Super.s_imap_blocks)
|
---|
234 | #define ZMAPS ((unsigned)Super.s_zmap_blocks)
|
---|
235 | #define FIRSTZONE ((unsigned)Super.s_firstdatazone)
|
---|
236 | #define ZONESIZE ((unsigned)Super.s_log_zone_size)
|
---|
237 | #define MAXSIZE ((unsigned)Super.s_max_size)
|
---|
238 | #define MAGIC (Super.s_magic)
|
---|
239 |
|
---|
240 | /* gcc likes this more (code is smaller) than macro variant */
|
---|
241 | static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
|
---|
242 | {
|
---|
243 | return (size + n-1) / n;
|
---|
244 | }
|
---|
245 |
|
---|
246 | #if !ENABLE_FEATURE_MINIX2
|
---|
247 | #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
|
---|
248 | #else
|
---|
249 | #define INODE_BLOCKS div_roundup(INODES, \
|
---|
250 | (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
|
---|
251 | #endif
|
---|
252 |
|
---|
253 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
|
---|
254 | #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS)
|
---|
255 |
|
---|
256 | /* Before you ask "where they come from?": */
|
---|
257 | /* setbit/clrbit are supplied by sys/param.h */
|
---|
258 |
|
---|
259 | static int minix_bit(const char *a, unsigned i)
|
---|
260 | {
|
---|
261 | return (a[i >> 3] & (1<<(i & 7)));
|
---|
262 | }
|
---|
263 |
|
---|
264 | static void minix_setbit(char *a, unsigned i)
|
---|
265 | {
|
---|
266 | setbit(a, i);
|
---|
267 | changed = 1;
|
---|
268 | }
|
---|
269 | static void minix_clrbit(char *a, unsigned i)
|
---|
270 | {
|
---|
271 | clrbit(a, i);
|
---|
272 | changed = 1;
|
---|
273 | }
|
---|
274 |
|
---|
275 | /* Note: do not assume 0/1, it is 0/nonzero */
|
---|
276 | #define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1))
|
---|
277 | #define inode_in_use(x) (minix_bit(inode_map,(x)))
|
---|
278 |
|
---|
279 | #define mark_inode(x) (minix_setbit(inode_map,(x)))
|
---|
280 | #define unmark_inode(x) (minix_clrbit(inode_map,(x)))
|
---|
281 |
|
---|
282 | #define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1))
|
---|
283 | #define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1))
|
---|
284 |
|
---|
285 |
|
---|
286 | static void recursive_check(unsigned ino);
|
---|
287 | #if ENABLE_FEATURE_MINIX2
|
---|
288 | static void recursive_check2(unsigned ino);
|
---|
289 | #endif
|
---|
290 |
|
---|
291 | static void die(const char *str) NORETURN;
|
---|
292 | static void die(const char *str)
|
---|
293 | {
|
---|
294 | if (termios_set)
|
---|
295 | tcsetattr_stdin_TCSANOW(&sv_termios);
|
---|
296 | bb_error_msg_and_die("%s", str);
|
---|
297 | }
|
---|
298 |
|
---|
299 | static void push_filename(const char *name)
|
---|
300 | {
|
---|
301 | // /dir/dir/dir/file
|
---|
302 | // ^ ^ ^
|
---|
303 | // [0] [1] [2] <-name_component[i]
|
---|
304 | if (name_depth < MAX_DEPTH) {
|
---|
305 | int len;
|
---|
306 | char *p = name_component[name_depth];
|
---|
307 | *p++ = '/';
|
---|
308 | len = sprintf(p, "%.*s", namelen, name);
|
---|
309 | name_component[name_depth + 1] = p + len;
|
---|
310 | }
|
---|
311 | name_depth++;
|
---|
312 | }
|
---|
313 |
|
---|
314 | static void pop_filename(void)
|
---|
315 | {
|
---|
316 | name_depth--;
|
---|
317 | if (name_depth < MAX_DEPTH) {
|
---|
318 | *name_component[name_depth] = '\0';
|
---|
319 | if (!name_depth) {
|
---|
320 | current_name[0] = '/';
|
---|
321 | current_name[1] = '\0';
|
---|
322 | }
|
---|
323 | }
|
---|
324 | }
|
---|
325 |
|
---|
326 | static int ask(const char *string, int def)
|
---|
327 | {
|
---|
328 | int c;
|
---|
329 |
|
---|
330 | if (!OPT_repair) {
|
---|
331 | bb_putchar('\n');
|
---|
332 | errors_uncorrected = 1;
|
---|
333 | return 0;
|
---|
334 | }
|
---|
335 | if (OPT_automatic) {
|
---|
336 | bb_putchar('\n');
|
---|
337 | if (!def)
|
---|
338 | errors_uncorrected = 1;
|
---|
339 | return def;
|
---|
340 | }
|
---|
341 | printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
|
---|
342 | for (;;) {
|
---|
343 | fflush_all();
|
---|
344 | c = getchar();
|
---|
345 | if (c == EOF) {
|
---|
346 | if (!def)
|
---|
347 | errors_uncorrected = 1;
|
---|
348 | return def;
|
---|
349 | }
|
---|
350 | if (c == '\n')
|
---|
351 | break;
|
---|
352 | c |= 0x20; /* tolower */
|
---|
353 | if (c == 'y') {
|
---|
354 | def = 1;
|
---|
355 | break;
|
---|
356 | }
|
---|
357 | if (c == 'n') {
|
---|
358 | def = 0;
|
---|
359 | break;
|
---|
360 | }
|
---|
361 | }
|
---|
362 | if (def)
|
---|
363 | printf("y\n");
|
---|
364 | else {
|
---|
365 | printf("n\n");
|
---|
366 | errors_uncorrected = 1;
|
---|
367 | }
|
---|
368 | return def;
|
---|
369 | }
|
---|
370 |
|
---|
371 | /*
|
---|
372 | * Make certain that we aren't checking a filesystem that is on a
|
---|
373 | * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
|
---|
374 | * 1994 Theodore Ts'o. Also licensed under GPL.
|
---|
375 | */
|
---|
376 | static void check_mount(void)
|
---|
377 | {
|
---|
378 | if (find_mount_point(device_name, 0)) {
|
---|
379 | int cont;
|
---|
380 | #if ENABLE_FEATURE_MTAB_SUPPORT
|
---|
381 | /*
|
---|
382 | * If the root is mounted read-only, then /etc/mtab is
|
---|
383 | * probably not correct; so we won't issue a warning based on
|
---|
384 | * it.
|
---|
385 | */
|
---|
386 | int fd = open(bb_path_mtab_file, O_RDWR);
|
---|
387 |
|
---|
388 | if (fd < 0 && errno == EROFS)
|
---|
389 | return;
|
---|
390 | close(fd);
|
---|
391 | #endif
|
---|
392 | printf("%s is mounted. ", device_name);
|
---|
393 | cont = 0;
|
---|
394 | if (isatty(0) && isatty(1))
|
---|
395 | cont = ask("Do you really want to continue", 0);
|
---|
396 | if (!cont) {
|
---|
397 | printf("Check aborted\n");
|
---|
398 | exit(EXIT_SUCCESS);
|
---|
399 | }
|
---|
400 | }
|
---|
401 | }
|
---|
402 |
|
---|
403 | /*
|
---|
404 | * check_zone_nr checks to see that *nr is a valid zone nr. If it
|
---|
405 | * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
|
---|
406 | * if an error was corrected, and returns the zone (0 for no zone
|
---|
407 | * or a bad zone-number).
|
---|
408 | */
|
---|
409 | static int check_zone_nr2(uint32_t *nr, smallint *corrected)
|
---|
410 | {
|
---|
411 | const char *msg;
|
---|
412 | if (!*nr)
|
---|
413 | return 0;
|
---|
414 | if (*nr < FIRSTZONE)
|
---|
415 | msg = "< FIRSTZONE";
|
---|
416 | else if (*nr >= ZONES)
|
---|
417 | msg = ">= ZONES";
|
---|
418 | else
|
---|
419 | return *nr;
|
---|
420 | printf("Zone nr %s in file '%s'. ", msg, current_name);
|
---|
421 | if (ask("Remove block", 1)) {
|
---|
422 | *nr = 0;
|
---|
423 | *corrected = 1;
|
---|
424 | }
|
---|
425 | return 0;
|
---|
426 | }
|
---|
427 |
|
---|
428 | static int check_zone_nr(uint16_t *nr, smallint *corrected)
|
---|
429 | {
|
---|
430 | uint32_t nr32 = *nr;
|
---|
431 | int r = check_zone_nr2(&nr32, corrected);
|
---|
432 | *nr = (uint16_t)nr32;
|
---|
433 | return r;
|
---|
434 | }
|
---|
435 |
|
---|
436 | /*
|
---|
437 | * read-block reads block nr into the buffer at addr.
|
---|
438 | */
|
---|
439 | static void read_block(unsigned nr, void *addr)
|
---|
440 | {
|
---|
441 | if (!nr) {
|
---|
442 | memset(addr, 0, BLOCK_SIZE);
|
---|
443 | return;
|
---|
444 | }
|
---|
445 | xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
|
---|
446 | if (BLOCK_SIZE != full_read(dev_fd, addr, BLOCK_SIZE)) {
|
---|
447 | printf("%s: bad block %u in file '%s'\n",
|
---|
448 | bb_msg_read_error, nr, current_name);
|
---|
449 | errors_uncorrected = 1;
|
---|
450 | memset(addr, 0, BLOCK_SIZE);
|
---|
451 | }
|
---|
452 | }
|
---|
453 |
|
---|
454 | /*
|
---|
455 | * write_block writes block nr to disk.
|
---|
456 | */
|
---|
457 | static void write_block(unsigned nr, void *addr)
|
---|
458 | {
|
---|
459 | if (!nr)
|
---|
460 | return;
|
---|
461 | if (nr < FIRSTZONE || nr >= ZONES) {
|
---|
462 | printf("Internal error: trying to write bad block\n"
|
---|
463 | "Write request ignored\n");
|
---|
464 | errors_uncorrected = 1;
|
---|
465 | return;
|
---|
466 | }
|
---|
467 | xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
|
---|
468 | if (BLOCK_SIZE != full_write(dev_fd, addr, BLOCK_SIZE)) {
|
---|
469 | printf("%s: bad block %u in file '%s'\n",
|
---|
470 | bb_msg_write_error, nr, current_name);
|
---|
471 | errors_uncorrected = 1;
|
---|
472 | }
|
---|
473 | }
|
---|
474 |
|
---|
475 | /*
|
---|
476 | * map_block calculates the absolute block nr of a block in a file.
|
---|
477 | * It sets 'changed' if the inode has needed changing, and re-writes
|
---|
478 | * any indirect blocks with errors.
|
---|
479 | */
|
---|
480 | static int map_block(struct minix1_inode *inode, unsigned blknr)
|
---|
481 | {
|
---|
482 | uint16_t ind[BLOCK_SIZE >> 1];
|
---|
483 | int block, result;
|
---|
484 | smallint blk_chg;
|
---|
485 |
|
---|
486 | if (blknr < 7)
|
---|
487 | return check_zone_nr(inode->i_zone + blknr, &changed);
|
---|
488 | blknr -= 7;
|
---|
489 | if (blknr < 512) {
|
---|
490 | block = check_zone_nr(inode->i_zone + 7, &changed);
|
---|
491 | goto common;
|
---|
492 | }
|
---|
493 | blknr -= 512;
|
---|
494 | block = check_zone_nr(inode->i_zone + 8, &changed);
|
---|
495 | read_block(block, ind); /* double indirect */
|
---|
496 | blk_chg = 0;
|
---|
497 | result = check_zone_nr(&ind[blknr / 512], &blk_chg);
|
---|
498 | if (blk_chg)
|
---|
499 | write_block(block, ind);
|
---|
500 | block = result;
|
---|
501 | common:
|
---|
502 | read_block(block, ind);
|
---|
503 | blk_chg = 0;
|
---|
504 | result = check_zone_nr(&ind[blknr % 512], &blk_chg);
|
---|
505 | if (blk_chg)
|
---|
506 | write_block(block, ind);
|
---|
507 | return result;
|
---|
508 | }
|
---|
509 |
|
---|
510 | #if ENABLE_FEATURE_MINIX2
|
---|
511 | static int map_block2(struct minix2_inode *inode, unsigned blknr)
|
---|
512 | {
|
---|
513 | uint32_t ind[BLOCK_SIZE >> 2];
|
---|
514 | int block, result;
|
---|
515 | smallint blk_chg;
|
---|
516 |
|
---|
517 | if (blknr < 7)
|
---|
518 | return check_zone_nr2(inode->i_zone + blknr, &changed);
|
---|
519 | blknr -= 7;
|
---|
520 | if (blknr < 256) {
|
---|
521 | block = check_zone_nr2(inode->i_zone + 7, &changed);
|
---|
522 | goto common2;
|
---|
523 | }
|
---|
524 | blknr -= 256;
|
---|
525 | if (blknr < 256 * 256) {
|
---|
526 | block = check_zone_nr2(inode->i_zone + 8, &changed);
|
---|
527 | goto common1;
|
---|
528 | }
|
---|
529 | blknr -= 256 * 256;
|
---|
530 | block = check_zone_nr2(inode->i_zone + 9, &changed);
|
---|
531 | read_block(block, ind); /* triple indirect */
|
---|
532 | blk_chg = 0;
|
---|
533 | result = check_zone_nr2(&ind[blknr / (256 * 256)], &blk_chg);
|
---|
534 | if (blk_chg)
|
---|
535 | write_block(block, ind);
|
---|
536 | block = result;
|
---|
537 | common1:
|
---|
538 | read_block(block, ind); /* double indirect */
|
---|
539 | blk_chg = 0;
|
---|
540 | result = check_zone_nr2(&ind[(blknr / 256) % 256], &blk_chg);
|
---|
541 | if (blk_chg)
|
---|
542 | write_block(block, ind);
|
---|
543 | block = result;
|
---|
544 | common2:
|
---|
545 | read_block(block, ind);
|
---|
546 | blk_chg = 0;
|
---|
547 | result = check_zone_nr2(&ind[blknr % 256], &blk_chg);
|
---|
548 | if (blk_chg)
|
---|
549 | write_block(block, ind);
|
---|
550 | return result;
|
---|
551 | }
|
---|
552 | #endif
|
---|
553 |
|
---|
554 | static void write_superblock(void)
|
---|
555 | {
|
---|
556 | /*
|
---|
557 | * Set the state of the filesystem based on whether or not there
|
---|
558 | * are uncorrected errors. The filesystem valid flag is
|
---|
559 | * unconditionally set if we get this far.
|
---|
560 | */
|
---|
561 | Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS;
|
---|
562 | if (!errors_uncorrected)
|
---|
563 | Super.s_state &= ~MINIX_ERROR_FS;
|
---|
564 |
|
---|
565 | xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
|
---|
566 | if (BLOCK_SIZE != full_write(dev_fd, superblock_buffer, BLOCK_SIZE))
|
---|
567 | die("can't write superblock");
|
---|
568 | }
|
---|
569 |
|
---|
570 | static void write_tables(void)
|
---|
571 | {
|
---|
572 | write_superblock();
|
---|
573 |
|
---|
574 | if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
|
---|
575 | die("can't write inode map");
|
---|
576 | if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
577 | die("can't write zone map");
|
---|
578 | if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
|
---|
579 | die("can't write inodes");
|
---|
580 | }
|
---|
581 |
|
---|
582 | static void get_dirsize(void)
|
---|
583 | {
|
---|
584 | int block;
|
---|
585 | char blk[BLOCK_SIZE];
|
---|
586 | int size;
|
---|
587 |
|
---|
588 | #if ENABLE_FEATURE_MINIX2
|
---|
589 | if (version2)
|
---|
590 | block = Inode2[MINIX_ROOT_INO].i_zone[0];
|
---|
591 | else
|
---|
592 | #endif
|
---|
593 | block = Inode1[MINIX_ROOT_INO].i_zone[0];
|
---|
594 | read_block(block, blk);
|
---|
595 | for (size = 16; size < BLOCK_SIZE; size <<= 1) {
|
---|
596 | if (strcmp(blk + size + 2, "..") == 0) {
|
---|
597 | dirsize = size;
|
---|
598 | namelen = size - 2;
|
---|
599 | return;
|
---|
600 | }
|
---|
601 | }
|
---|
602 | /* use defaults */
|
---|
603 | }
|
---|
604 |
|
---|
605 | static void read_superblock(void)
|
---|
606 | {
|
---|
607 | xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
|
---|
608 | if (BLOCK_SIZE != full_read(dev_fd, superblock_buffer, BLOCK_SIZE))
|
---|
609 | die("can't read superblock");
|
---|
610 | /* already initialized to:
|
---|
611 | namelen = 14;
|
---|
612 | dirsize = 16;
|
---|
613 | version2 = 0;
|
---|
614 | */
|
---|
615 | if (MAGIC == MINIX1_SUPER_MAGIC) {
|
---|
616 | } else if (MAGIC == MINIX1_SUPER_MAGIC2) {
|
---|
617 | namelen = 30;
|
---|
618 | dirsize = 32;
|
---|
619 | #if ENABLE_FEATURE_MINIX2
|
---|
620 | } else if (MAGIC == MINIX2_SUPER_MAGIC) {
|
---|
621 | version2 = 1;
|
---|
622 | } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
|
---|
623 | namelen = 30;
|
---|
624 | dirsize = 32;
|
---|
625 | version2 = 1;
|
---|
626 | #endif
|
---|
627 | } else
|
---|
628 | die("bad magic number in superblock");
|
---|
629 | if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
|
---|
630 | die("only 1k blocks/zones supported");
|
---|
631 | if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
|
---|
632 | die("bad s_imap_blocks field in superblock");
|
---|
633 | if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
|
---|
634 | die("bad s_zmap_blocks field in superblock");
|
---|
635 | }
|
---|
636 |
|
---|
637 | static void read_tables(void)
|
---|
638 | {
|
---|
639 | inode_map = xzalloc(IMAPS * BLOCK_SIZE);
|
---|
640 | zone_map = xzalloc(ZMAPS * BLOCK_SIZE);
|
---|
641 | inode_buffer = xmalloc(INODE_BUFFER_SIZE);
|
---|
642 | inode_count = xmalloc(INODES + 1);
|
---|
643 | zone_count = xmalloc(ZONES);
|
---|
644 | if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
|
---|
645 | die("can't read inode map");
|
---|
646 | if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
647 | die("can't read zone map");
|
---|
648 | if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
|
---|
649 | die("can't read inodes");
|
---|
650 | if (NORM_FIRSTZONE != FIRSTZONE) {
|
---|
651 | printf("warning: firstzone!=norm_firstzone\n");
|
---|
652 | errors_uncorrected = 1;
|
---|
653 | }
|
---|
654 | get_dirsize();
|
---|
655 | if (OPT_show) {
|
---|
656 | printf("%u inodes\n"
|
---|
657 | "%u blocks\n"
|
---|
658 | "Firstdatazone=%u (%u)\n"
|
---|
659 | "Zonesize=%u\n"
|
---|
660 | "Maxsize=%u\n"
|
---|
661 | "Filesystem state=%u\n"
|
---|
662 | "namelen=%u\n\n",
|
---|
663 | INODES,
|
---|
664 | ZONES,
|
---|
665 | FIRSTZONE, NORM_FIRSTZONE,
|
---|
666 | BLOCK_SIZE << ZONESIZE,
|
---|
667 | MAXSIZE,
|
---|
668 | Super.s_state,
|
---|
669 | namelen);
|
---|
670 | }
|
---|
671 | }
|
---|
672 |
|
---|
673 | static void get_inode_common(unsigned nr, uint16_t i_mode)
|
---|
674 | {
|
---|
675 | total++;
|
---|
676 | if (!inode_count[nr]) {
|
---|
677 | if (!inode_in_use(nr)) {
|
---|
678 | printf("Inode %d is marked as 'unused', but it is used "
|
---|
679 | "for file '%s'\n", nr, current_name);
|
---|
680 | if (OPT_repair) {
|
---|
681 | if (ask("Mark as 'in use'", 1))
|
---|
682 | mark_inode(nr);
|
---|
683 | else
|
---|
684 | errors_uncorrected = 1;
|
---|
685 | }
|
---|
686 | }
|
---|
687 | if (S_ISDIR(i_mode))
|
---|
688 | directory++;
|
---|
689 | else if (S_ISREG(i_mode))
|
---|
690 | regular++;
|
---|
691 | else if (S_ISCHR(i_mode))
|
---|
692 | chardev++;
|
---|
693 | else if (S_ISBLK(i_mode))
|
---|
694 | blockdev++;
|
---|
695 | else if (S_ISLNK(i_mode))
|
---|
696 | symlinks++;
|
---|
697 | else if (S_ISSOCK(i_mode));
|
---|
698 | else if (S_ISFIFO(i_mode));
|
---|
699 | else {
|
---|
700 | printf("%s has mode %05o\n", current_name, i_mode);
|
---|
701 | }
|
---|
702 | } else
|
---|
703 | links++;
|
---|
704 | if (!++inode_count[nr]) {
|
---|
705 | printf("Warning: inode count too big\n");
|
---|
706 | inode_count[nr]--;
|
---|
707 | errors_uncorrected = 1;
|
---|
708 | }
|
---|
709 | }
|
---|
710 |
|
---|
711 | static struct minix1_inode *get_inode(unsigned nr)
|
---|
712 | {
|
---|
713 | struct minix1_inode *inode;
|
---|
714 |
|
---|
715 | if (!nr || nr > INODES)
|
---|
716 | return NULL;
|
---|
717 | inode = Inode1 + nr;
|
---|
718 | get_inode_common(nr, inode->i_mode);
|
---|
719 | return inode;
|
---|
720 | }
|
---|
721 |
|
---|
722 | #if ENABLE_FEATURE_MINIX2
|
---|
723 | static struct minix2_inode *get_inode2(unsigned nr)
|
---|
724 | {
|
---|
725 | struct minix2_inode *inode;
|
---|
726 |
|
---|
727 | if (!nr || nr > INODES)
|
---|
728 | return NULL;
|
---|
729 | inode = Inode2 + nr;
|
---|
730 | get_inode_common(nr, inode->i_mode);
|
---|
731 | return inode;
|
---|
732 | }
|
---|
733 | #endif
|
---|
734 |
|
---|
735 | static void check_root(void)
|
---|
736 | {
|
---|
737 | struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO;
|
---|
738 |
|
---|
739 | if (!inode || !S_ISDIR(inode->i_mode))
|
---|
740 | die("root inode isn't a directory");
|
---|
741 | }
|
---|
742 |
|
---|
743 | #if ENABLE_FEATURE_MINIX2
|
---|
744 | static void check_root2(void)
|
---|
745 | {
|
---|
746 | struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO;
|
---|
747 |
|
---|
748 | if (!inode || !S_ISDIR(inode->i_mode))
|
---|
749 | die("root inode isn't a directory");
|
---|
750 | }
|
---|
751 | #else
|
---|
752 | void check_root2(void);
|
---|
753 | #endif
|
---|
754 |
|
---|
755 | static int add_zone_common(int block, smallint *corrected)
|
---|
756 | {
|
---|
757 | if (!block)
|
---|
758 | return 0;
|
---|
759 | if (zone_count[block]) {
|
---|
760 | printf("Already used block is reused in file '%s'. ",
|
---|
761 | current_name);
|
---|
762 | if (ask("Clear", 1)) {
|
---|
763 | block = 0;
|
---|
764 | *corrected = 1;
|
---|
765 | return -1; /* "please zero out *znr" */
|
---|
766 | }
|
---|
767 | }
|
---|
768 | if (!zone_in_use(block)) {
|
---|
769 | printf("Block %d in file '%s' is marked as 'unused'. ",
|
---|
770 | block, current_name);
|
---|
771 | if (ask("Correct", 1))
|
---|
772 | mark_zone(block);
|
---|
773 | }
|
---|
774 | if (!++zone_count[block])
|
---|
775 | zone_count[block]--;
|
---|
776 | return block;
|
---|
777 | }
|
---|
778 |
|
---|
779 | static int add_zone(uint16_t *znr, smallint *corrected)
|
---|
780 | {
|
---|
781 | int block;
|
---|
782 |
|
---|
783 | block = check_zone_nr(znr, corrected);
|
---|
784 | block = add_zone_common(block, corrected);
|
---|
785 | if (block == -1) {
|
---|
786 | *znr = 0;
|
---|
787 | block = 0;
|
---|
788 | }
|
---|
789 | return block;
|
---|
790 | }
|
---|
791 |
|
---|
792 | #if ENABLE_FEATURE_MINIX2
|
---|
793 | static int add_zone2(uint32_t *znr, smallint *corrected)
|
---|
794 | {
|
---|
795 | int block;
|
---|
796 |
|
---|
797 | block = check_zone_nr2(znr, corrected);
|
---|
798 | block = add_zone_common(block, corrected);
|
---|
799 | if (block == -1) {
|
---|
800 | *znr = 0;
|
---|
801 | block = 0;
|
---|
802 | }
|
---|
803 | return block;
|
---|
804 | }
|
---|
805 | #endif
|
---|
806 |
|
---|
807 | static void add_zone_ind(uint16_t *znr, smallint *corrected)
|
---|
808 | {
|
---|
809 | int i;
|
---|
810 | int block;
|
---|
811 | smallint chg_blk = 0;
|
---|
812 |
|
---|
813 | block = add_zone(znr, corrected);
|
---|
814 | if (!block)
|
---|
815 | return;
|
---|
816 | read_block(block, add_zone_ind_blk);
|
---|
817 | for (i = 0; i < (BLOCK_SIZE >> 1); i++)
|
---|
818 | add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk);
|
---|
819 | if (chg_blk)
|
---|
820 | write_block(block, add_zone_ind_blk);
|
---|
821 | }
|
---|
822 |
|
---|
823 | #if ENABLE_FEATURE_MINIX2
|
---|
824 | static void add_zone_ind2(uint32_t *znr, smallint *corrected)
|
---|
825 | {
|
---|
826 | int i;
|
---|
827 | int block;
|
---|
828 | smallint chg_blk = 0;
|
---|
829 |
|
---|
830 | block = add_zone2(znr, corrected);
|
---|
831 | if (!block)
|
---|
832 | return;
|
---|
833 | read_block(block, add_zone_ind_blk);
|
---|
834 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
835 | add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk);
|
---|
836 | if (chg_blk)
|
---|
837 | write_block(block, add_zone_ind_blk);
|
---|
838 | }
|
---|
839 | #endif
|
---|
840 |
|
---|
841 | static void add_zone_dind(uint16_t *znr, smallint *corrected)
|
---|
842 | {
|
---|
843 | int i;
|
---|
844 | int block;
|
---|
845 | smallint chg_blk = 0;
|
---|
846 |
|
---|
847 | block = add_zone(znr, corrected);
|
---|
848 | if (!block)
|
---|
849 | return;
|
---|
850 | read_block(block, add_zone_dind_blk);
|
---|
851 | for (i = 0; i < (BLOCK_SIZE >> 1); i++)
|
---|
852 | add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk);
|
---|
853 | if (chg_blk)
|
---|
854 | write_block(block, add_zone_dind_blk);
|
---|
855 | }
|
---|
856 |
|
---|
857 | #if ENABLE_FEATURE_MINIX2
|
---|
858 | static void add_zone_dind2(uint32_t *znr, smallint *corrected)
|
---|
859 | {
|
---|
860 | int i;
|
---|
861 | int block;
|
---|
862 | smallint chg_blk = 0;
|
---|
863 |
|
---|
864 | block = add_zone2(znr, corrected);
|
---|
865 | if (!block)
|
---|
866 | return;
|
---|
867 | read_block(block, add_zone_dind_blk);
|
---|
868 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
869 | add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk);
|
---|
870 | if (chg_blk)
|
---|
871 | write_block(block, add_zone_dind_blk);
|
---|
872 | }
|
---|
873 |
|
---|
874 | static void add_zone_tind2(uint32_t *znr, smallint *corrected)
|
---|
875 | {
|
---|
876 | int i;
|
---|
877 | int block;
|
---|
878 | smallint chg_blk = 0;
|
---|
879 |
|
---|
880 | block = add_zone2(znr, corrected);
|
---|
881 | if (!block)
|
---|
882 | return;
|
---|
883 | read_block(block, add_zone_tind_blk);
|
---|
884 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
885 | add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk);
|
---|
886 | if (chg_blk)
|
---|
887 | write_block(block, add_zone_tind_blk);
|
---|
888 | }
|
---|
889 | #endif
|
---|
890 |
|
---|
891 | static void check_zones(unsigned i)
|
---|
892 | {
|
---|
893 | struct minix1_inode *inode;
|
---|
894 |
|
---|
895 | if (!i || i > INODES)
|
---|
896 | return;
|
---|
897 | if (inode_count[i] > 1) /* have we counted this file already? */
|
---|
898 | return;
|
---|
899 | inode = Inode1 + i;
|
---|
900 | if (!S_ISDIR(inode->i_mode)
|
---|
901 | && !S_ISREG(inode->i_mode)
|
---|
902 | && !S_ISLNK(inode->i_mode)
|
---|
903 | ) {
|
---|
904 | return;
|
---|
905 | }
|
---|
906 | for (i = 0; i < 7; i++)
|
---|
907 | add_zone(i + inode->i_zone, &changed);
|
---|
908 | add_zone_ind(7 + inode->i_zone, &changed);
|
---|
909 | add_zone_dind(8 + inode->i_zone, &changed);
|
---|
910 | }
|
---|
911 |
|
---|
912 | #if ENABLE_FEATURE_MINIX2
|
---|
913 | static void check_zones2(unsigned i)
|
---|
914 | {
|
---|
915 | struct minix2_inode *inode;
|
---|
916 |
|
---|
917 | if (!i || i > INODES)
|
---|
918 | return;
|
---|
919 | if (inode_count[i] > 1) /* have we counted this file already? */
|
---|
920 | return;
|
---|
921 | inode = Inode2 + i;
|
---|
922 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
|
---|
923 | && !S_ISLNK(inode->i_mode))
|
---|
924 | return;
|
---|
925 | for (i = 0; i < 7; i++)
|
---|
926 | add_zone2(i + inode->i_zone, &changed);
|
---|
927 | add_zone_ind2(7 + inode->i_zone, &changed);
|
---|
928 | add_zone_dind2(8 + inode->i_zone, &changed);
|
---|
929 | add_zone_tind2(9 + inode->i_zone, &changed);
|
---|
930 | }
|
---|
931 | #endif
|
---|
932 |
|
---|
933 | static void check_file(struct minix1_inode *dir, unsigned offset)
|
---|
934 | {
|
---|
935 | struct minix1_inode *inode;
|
---|
936 | int ino;
|
---|
937 | char *name;
|
---|
938 | int block;
|
---|
939 |
|
---|
940 | block = map_block(dir, offset / BLOCK_SIZE);
|
---|
941 | read_block(block, check_file_blk);
|
---|
942 | name = check_file_blk + (offset % BLOCK_SIZE) + 2;
|
---|
943 | ino = *(uint16_t *) (name - 2);
|
---|
944 | if (ino > INODES) {
|
---|
945 | printf("%s contains a bad inode number for file '%.*s'. ",
|
---|
946 | current_name, namelen, name);
|
---|
947 | if (ask("Remove", 1)) {
|
---|
948 | *(uint16_t *) (name - 2) = 0;
|
---|
949 | write_block(block, check_file_blk);
|
---|
950 | }
|
---|
951 | ino = 0;
|
---|
952 | }
|
---|
953 | push_filename(name);
|
---|
954 | inode = get_inode(ino);
|
---|
955 | pop_filename();
|
---|
956 | if (!offset) {
|
---|
957 | if (inode && LONE_CHAR(name, '.'))
|
---|
958 | return;
|
---|
959 | printf("%s: bad directory: '.' isn't first\n", current_name);
|
---|
960 | errors_uncorrected = 1;
|
---|
961 | }
|
---|
962 | if (offset == dirsize) {
|
---|
963 | if (inode && strcmp("..", name) == 0)
|
---|
964 | return;
|
---|
965 | printf("%s: bad directory: '..' isn't second\n", current_name);
|
---|
966 | errors_uncorrected = 1;
|
---|
967 | }
|
---|
968 | if (!inode)
|
---|
969 | return;
|
---|
970 | push_filename(name);
|
---|
971 | if (OPT_list) {
|
---|
972 | if (OPT_verbose)
|
---|
973 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
|
---|
974 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
|
---|
975 | }
|
---|
976 | check_zones(ino);
|
---|
977 | if (inode && S_ISDIR(inode->i_mode))
|
---|
978 | recursive_check(ino);
|
---|
979 | pop_filename();
|
---|
980 | }
|
---|
981 |
|
---|
982 | #if ENABLE_FEATURE_MINIX2
|
---|
983 | static void check_file2(struct minix2_inode *dir, unsigned offset)
|
---|
984 | {
|
---|
985 | struct minix2_inode *inode;
|
---|
986 | int ino;
|
---|
987 | char *name;
|
---|
988 | int block;
|
---|
989 |
|
---|
990 | block = map_block2(dir, offset / BLOCK_SIZE);
|
---|
991 | read_block(block, check_file_blk);
|
---|
992 | name = check_file_blk + (offset % BLOCK_SIZE) + 2;
|
---|
993 | ino = *(uint16_t *) (name - 2);
|
---|
994 | if (ino > INODES) {
|
---|
995 | printf("%s contains a bad inode number for file '%.*s'. ",
|
---|
996 | current_name, namelen, name);
|
---|
997 | if (ask("Remove", 1)) {
|
---|
998 | *(uint16_t *) (name - 2) = 0;
|
---|
999 | write_block(block, check_file_blk);
|
---|
1000 | }
|
---|
1001 | ino = 0;
|
---|
1002 | }
|
---|
1003 | push_filename(name);
|
---|
1004 | inode = get_inode2(ino);
|
---|
1005 | pop_filename();
|
---|
1006 | if (!offset) {
|
---|
1007 | if (inode && LONE_CHAR(name, '.'))
|
---|
1008 | return;
|
---|
1009 | printf("%s: bad directory: '.' isn't first\n", current_name);
|
---|
1010 | errors_uncorrected = 1;
|
---|
1011 | }
|
---|
1012 | if (offset == dirsize) {
|
---|
1013 | if (inode && strcmp("..", name) == 0)
|
---|
1014 | return;
|
---|
1015 | printf("%s: bad directory: '..' isn't second\n", current_name);
|
---|
1016 | errors_uncorrected = 1;
|
---|
1017 | }
|
---|
1018 | if (!inode)
|
---|
1019 | return;
|
---|
1020 | push_filename(name);
|
---|
1021 | if (OPT_list) {
|
---|
1022 | if (OPT_verbose)
|
---|
1023 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
|
---|
1024 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
|
---|
1025 | }
|
---|
1026 | check_zones2(ino);
|
---|
1027 | if (inode && S_ISDIR(inode->i_mode))
|
---|
1028 | recursive_check2(ino);
|
---|
1029 | pop_filename();
|
---|
1030 | }
|
---|
1031 | #endif
|
---|
1032 |
|
---|
1033 | static void recursive_check(unsigned ino)
|
---|
1034 | {
|
---|
1035 | struct minix1_inode *dir;
|
---|
1036 | unsigned offset;
|
---|
1037 |
|
---|
1038 | dir = Inode1 + ino;
|
---|
1039 | if (!S_ISDIR(dir->i_mode))
|
---|
1040 | die("internal error");
|
---|
1041 | if (dir->i_size < 2 * dirsize) {
|
---|
1042 | printf("%s: bad directory: size<32", current_name);
|
---|
1043 | errors_uncorrected = 1;
|
---|
1044 | }
|
---|
1045 | for (offset = 0; offset < dir->i_size; offset += dirsize)
|
---|
1046 | check_file(dir, offset);
|
---|
1047 | }
|
---|
1048 |
|
---|
1049 | #if ENABLE_FEATURE_MINIX2
|
---|
1050 | static void recursive_check2(unsigned ino)
|
---|
1051 | {
|
---|
1052 | struct minix2_inode *dir;
|
---|
1053 | unsigned offset;
|
---|
1054 |
|
---|
1055 | dir = Inode2 + ino;
|
---|
1056 | if (!S_ISDIR(dir->i_mode))
|
---|
1057 | die("internal error");
|
---|
1058 | if (dir->i_size < 2 * dirsize) {
|
---|
1059 | printf("%s: bad directory: size<32", current_name);
|
---|
1060 | errors_uncorrected = 1;
|
---|
1061 | }
|
---|
1062 | for (offset = 0; offset < dir->i_size; offset += dirsize)
|
---|
1063 | check_file2(dir, offset);
|
---|
1064 | }
|
---|
1065 | #endif
|
---|
1066 |
|
---|
1067 | static int bad_zone(int i)
|
---|
1068 | {
|
---|
1069 | char buffer[BLOCK_SIZE];
|
---|
1070 |
|
---|
1071 | xlseek(dev_fd, BLOCK_SIZE * i, SEEK_SET);
|
---|
1072 | return (BLOCK_SIZE != full_read(dev_fd, buffer, BLOCK_SIZE));
|
---|
1073 | }
|
---|
1074 |
|
---|
1075 | static void check_counts(void)
|
---|
1076 | {
|
---|
1077 | int i;
|
---|
1078 |
|
---|
1079 | for (i = 1; i <= INODES; i++) {
|
---|
1080 | if (OPT_warn_mode && Inode1[i].i_mode && !inode_in_use(i)) {
|
---|
1081 | printf("Inode %d has non-zero mode. ", i);
|
---|
1082 | if (ask("Clear", 1)) {
|
---|
1083 | Inode1[i].i_mode = 0;
|
---|
1084 | changed = 1;
|
---|
1085 | }
|
---|
1086 | }
|
---|
1087 | if (!inode_count[i]) {
|
---|
1088 | if (!inode_in_use(i))
|
---|
1089 | continue;
|
---|
1090 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
|
---|
1091 | if (ask("Clear", 1))
|
---|
1092 | unmark_inode(i);
|
---|
1093 | continue;
|
---|
1094 | }
|
---|
1095 | if (!inode_in_use(i)) {
|
---|
1096 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
|
---|
1097 | if (ask("Set", 1))
|
---|
1098 | mark_inode(i);
|
---|
1099 | }
|
---|
1100 | if (Inode1[i].i_nlinks != inode_count[i]) {
|
---|
1101 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
|
---|
1102 | i, Inode1[i].i_mode, Inode1[i].i_nlinks,
|
---|
1103 | inode_count[i]);
|
---|
1104 | if (ask("Set i_nlinks to count", 1)) {
|
---|
1105 | Inode1[i].i_nlinks = inode_count[i];
|
---|
1106 | changed = 1;
|
---|
1107 | }
|
---|
1108 | }
|
---|
1109 | }
|
---|
1110 | for (i = FIRSTZONE; i < ZONES; i++) {
|
---|
1111 | if ((zone_in_use(i) != 0) == zone_count[i])
|
---|
1112 | continue;
|
---|
1113 | if (!zone_count[i]) {
|
---|
1114 | if (bad_zone(i))
|
---|
1115 | continue;
|
---|
1116 | printf("Zone %d is marked 'in use', but no file uses it. ", i);
|
---|
1117 | if (ask("Unmark", 1))
|
---|
1118 | unmark_zone(i);
|
---|
1119 | continue;
|
---|
1120 | }
|
---|
1121 | printf("Zone %d: %sin use, counted=%d\n",
|
---|
1122 | i, zone_in_use(i) ? "" : "not ", zone_count[i]);
|
---|
1123 | }
|
---|
1124 | }
|
---|
1125 |
|
---|
1126 | #if ENABLE_FEATURE_MINIX2
|
---|
1127 | static void check_counts2(void)
|
---|
1128 | {
|
---|
1129 | int i;
|
---|
1130 |
|
---|
1131 | for (i = 1; i <= INODES; i++) {
|
---|
1132 | if (OPT_warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
|
---|
1133 | printf("Inode %d has non-zero mode. ", i);
|
---|
1134 | if (ask("Clear", 1)) {
|
---|
1135 | Inode2[i].i_mode = 0;
|
---|
1136 | changed = 1;
|
---|
1137 | }
|
---|
1138 | }
|
---|
1139 | if (!inode_count[i]) {
|
---|
1140 | if (!inode_in_use(i))
|
---|
1141 | continue;
|
---|
1142 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
|
---|
1143 | if (ask("Clear", 1))
|
---|
1144 | unmark_inode(i);
|
---|
1145 | continue;
|
---|
1146 | }
|
---|
1147 | if (!inode_in_use(i)) {
|
---|
1148 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
|
---|
1149 | if (ask("Set", 1))
|
---|
1150 | mark_inode(i);
|
---|
1151 | }
|
---|
1152 | if (Inode2[i].i_nlinks != inode_count[i]) {
|
---|
1153 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
|
---|
1154 | i, Inode2[i].i_mode, Inode2[i].i_nlinks,
|
---|
1155 | inode_count[i]);
|
---|
1156 | if (ask("Set i_nlinks to count", 1)) {
|
---|
1157 | Inode2[i].i_nlinks = inode_count[i];
|
---|
1158 | changed = 1;
|
---|
1159 | }
|
---|
1160 | }
|
---|
1161 | }
|
---|
1162 | for (i = FIRSTZONE; i < ZONES; i++) {
|
---|
1163 | if ((zone_in_use(i) != 0) == zone_count[i])
|
---|
1164 | continue;
|
---|
1165 | if (!zone_count[i]) {
|
---|
1166 | if (bad_zone(i))
|
---|
1167 | continue;
|
---|
1168 | printf("Zone %d is marked 'in use', but no file uses it. ", i);
|
---|
1169 | if (ask("Unmark", 1))
|
---|
1170 | unmark_zone(i);
|
---|
1171 | continue;
|
---|
1172 | }
|
---|
1173 | printf("Zone %d: %sin use, counted=%d\n",
|
---|
1174 | i, zone_in_use(i) ? "" : "not ", zone_count[i]);
|
---|
1175 | }
|
---|
1176 | }
|
---|
1177 | #endif
|
---|
1178 |
|
---|
1179 | static void check(void)
|
---|
1180 | {
|
---|
1181 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
|
---|
1182 | memset(zone_count, 0, ZONES * sizeof(*zone_count));
|
---|
1183 | check_zones(MINIX_ROOT_INO);
|
---|
1184 | recursive_check(MINIX_ROOT_INO);
|
---|
1185 | check_counts();
|
---|
1186 | }
|
---|
1187 |
|
---|
1188 | #if ENABLE_FEATURE_MINIX2
|
---|
1189 | static void check2(void)
|
---|
1190 | {
|
---|
1191 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
|
---|
1192 | memset(zone_count, 0, ZONES * sizeof(*zone_count));
|
---|
1193 | check_zones2(MINIX_ROOT_INO);
|
---|
1194 | recursive_check2(MINIX_ROOT_INO);
|
---|
1195 | check_counts2();
|
---|
1196 | }
|
---|
1197 | #else
|
---|
1198 | void check2(void);
|
---|
1199 | #endif
|
---|
1200 |
|
---|
1201 | int fsck_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
1202 | int fsck_minix_main(int argc UNUSED_PARAM, char **argv)
|
---|
1203 | {
|
---|
1204 | struct termios tmp;
|
---|
1205 | int retcode = 0;
|
---|
1206 |
|
---|
1207 | xfunc_error_retval = 8;
|
---|
1208 |
|
---|
1209 | INIT_G();
|
---|
1210 |
|
---|
1211 | opt_complementary = "=1:ar"; /* one argument; -a assumes -r */
|
---|
1212 | getopt32(argv, OPTION_STR);
|
---|
1213 | argv += optind;
|
---|
1214 | device_name = argv[0];
|
---|
1215 |
|
---|
1216 | check_mount(); /* trying to check a mounted filesystem? */
|
---|
1217 | if (OPT_manual) {
|
---|
1218 | if (!isatty(0) || !isatty(1))
|
---|
1219 | die("need terminal for interactive repairs");
|
---|
1220 | }
|
---|
1221 | xmove_fd(xopen(device_name, OPT_repair ? O_RDWR : O_RDONLY), dev_fd);
|
---|
1222 |
|
---|
1223 | /*sync(); paranoia? */
|
---|
1224 | read_superblock();
|
---|
1225 |
|
---|
1226 | /*
|
---|
1227 | * Determine whether or not we should continue with the checking.
|
---|
1228 | * This is based on the status of the filesystem valid and error
|
---|
1229 | * flags and whether or not the -f switch was specified on the
|
---|
1230 | * command line.
|
---|
1231 | */
|
---|
1232 | printf("%s: %s\n", applet_name, bb_banner);
|
---|
1233 |
|
---|
1234 | if (!(Super.s_state & MINIX_ERROR_FS)
|
---|
1235 | && (Super.s_state & MINIX_VALID_FS) && !OPT_force
|
---|
1236 | ) {
|
---|
1237 | if (OPT_repair)
|
---|
1238 | printf("%s is clean, check is skipped\n", device_name);
|
---|
1239 | return 0;
|
---|
1240 | } else if (OPT_force)
|
---|
1241 | printf("Forcing filesystem check on %s\n", device_name);
|
---|
1242 | else if (OPT_repair)
|
---|
1243 | printf("Filesystem on %s is dirty, needs checking\n",
|
---|
1244 | device_name);
|
---|
1245 |
|
---|
1246 | read_tables();
|
---|
1247 |
|
---|
1248 | if (OPT_manual) {
|
---|
1249 | tcgetattr(0, &sv_termios);
|
---|
1250 | tmp = sv_termios;
|
---|
1251 | tmp.c_lflag &= ~(ICANON | ECHO);
|
---|
1252 | tcsetattr_stdin_TCSANOW(&tmp);
|
---|
1253 | termios_set = 1;
|
---|
1254 | }
|
---|
1255 |
|
---|
1256 | if (version2) {
|
---|
1257 | check_root2();
|
---|
1258 | check2();
|
---|
1259 | } else {
|
---|
1260 | check_root();
|
---|
1261 | check();
|
---|
1262 | }
|
---|
1263 |
|
---|
1264 | if (OPT_verbose) {
|
---|
1265 | int i, free_cnt;
|
---|
1266 |
|
---|
1267 | for (i = 1, free_cnt = 0; i <= INODES; i++)
|
---|
1268 | if (!inode_in_use(i))
|
---|
1269 | free_cnt++;
|
---|
1270 | printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt),
|
---|
1271 | 100 * (INODES - free_cnt) / INODES);
|
---|
1272 | for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
|
---|
1273 | if (!zone_in_use(i))
|
---|
1274 | free_cnt++;
|
---|
1275 | printf("%6u zones used (%u%%)\n\n"
|
---|
1276 | "%6u regular files\n"
|
---|
1277 | "%6u directories\n"
|
---|
1278 | "%6u character device files\n"
|
---|
1279 | "%6u block device files\n"
|
---|
1280 | "%6u links\n"
|
---|
1281 | "%6u symbolic links\n"
|
---|
1282 | "------\n"
|
---|
1283 | "%6u files\n",
|
---|
1284 | (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
|
---|
1285 | regular, directory, chardev, blockdev,
|
---|
1286 | links - 2 * directory + 1, symlinks,
|
---|
1287 | total - 2 * directory + 1);
|
---|
1288 | }
|
---|
1289 | if (changed) {
|
---|
1290 | write_tables();
|
---|
1291 | printf("FILE SYSTEM HAS BEEN CHANGED\n");
|
---|
1292 | sync();
|
---|
1293 | } else if (OPT_repair)
|
---|
1294 | write_superblock();
|
---|
1295 |
|
---|
1296 | if (OPT_manual)
|
---|
1297 | tcsetattr_stdin_TCSANOW(&sv_termios);
|
---|
1298 |
|
---|
1299 | if (changed)
|
---|
1300 | retcode += 3;
|
---|
1301 | if (errors_uncorrected)
|
---|
1302 | retcode += 4;
|
---|
1303 | return retcode;
|
---|
1304 | }
|
---|