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Fix up Andreas' changeset. Avoid use of dynamic automatic arrays,
[thirdparty/e2fsprogs.git] / e2fsck / pass2.c
1 /*
2 * pass2.c --- check directory structure
3 *
4 * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Public
8 * License.
9 * %End-Header%
10 *
11 * Pass 2 of e2fsck iterates through all active directory inodes, and
12 * applies to following tests to each directory entry in the directory
13 * blocks in the inodes:
14 *
15 * - The length of the directory entry (rec_len) should be at
16 * least 8 bytes, and no more than the remaining space
17 * left in the directory block.
18 * - The length of the name in the directory entry (name_len)
19 * should be less than (rec_len - 8).
20 * - The inode number in the directory entry should be within
21 * legal bounds.
22 * - The inode number should refer to a in-use inode.
23 * - The first entry should be '.', and its inode should be
24 * the inode of the directory.
25 * - The second entry should be '..'.
26 *
27 * To minimize disk seek time, the directory blocks are processed in
28 * sorted order of block numbers.
29 *
30 * Pass 2 also collects the following information:
31 * - The inode numbers of the subdirectories for each directory.
32 *
33 * Pass 2 relies on the following information from previous passes:
34 * - The directory information collected in pass 1.
35 * - The inode_used_map bitmap
36 * - The inode_bad_map bitmap
37 * - The inode_dir_map bitmap
38 *
39 * Pass 2 frees the following data structures
40 * - The inode_bad_map bitmap
41 * - The inode_reg_map bitmap
42 */
43
44 #include "e2fsck.h"
45 #include "problem.h"
46
47 #ifdef NO_INLINE_FUNCS
48 #define _INLINE_
49 #else
50 #define _INLINE_ inline
51 #endif
52
53 /*
54 * Keeps track of how many times an inode is referenced.
55 */
56 static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf);
57 static int check_dir_block(ext2_filsys fs,
58 struct ext2_db_entry *dir_blocks_info,
59 void *priv_data);
60 static int allocate_dir_block(e2fsck_t ctx,
61 struct ext2_db_entry *dir_blocks_info,
62 char *buf, struct problem_context *pctx);
63 static int update_dir_block(ext2_filsys fs,
64 blk_t *block_nr,
65 e2_blkcnt_t blockcnt,
66 blk_t ref_block,
67 int ref_offset,
68 void *priv_data);
69
70 struct check_dir_struct {
71 char *buf;
72 struct problem_context pctx;
73 int count, max;
74 e2fsck_t ctx;
75 };
76
77 void e2fsck_pass2(e2fsck_t ctx)
78 {
79 struct ext2_super_block *sb = ctx->fs->super;
80 struct problem_context pctx;
81 ext2_filsys fs = ctx->fs;
82 char *buf;
83 #ifdef RESOURCE_TRACK
84 struct resource_track rtrack;
85 #endif
86 struct dir_info *dir;
87 struct check_dir_struct cd;
88
89 #ifdef RESOURCE_TRACK
90 init_resource_track(&rtrack);
91 #endif
92
93 clear_problem_context(&cd.pctx);
94
95 #ifdef MTRACE
96 mtrace_print("Pass 2");
97 #endif
98
99 if (!(ctx->options & E2F_OPT_PREEN))
100 fix_problem(ctx, PR_2_PASS_HEADER, &cd.pctx);
101
102 cd.pctx.errcode = ext2fs_create_icount2(fs, EXT2_ICOUNT_OPT_INCREMENT,
103 0, ctx->inode_link_info,
104 &ctx->inode_count);
105 if (cd.pctx.errcode) {
106 fix_problem(ctx, PR_2_ALLOCATE_ICOUNT, &cd.pctx);
107 ctx->flags |= E2F_FLAG_ABORT;
108 return;
109 }
110 buf = (char *) e2fsck_allocate_memory(ctx, 2*fs->blocksize,
111 "directory scan buffer");
112
113 /*
114 * Set up the parent pointer for the root directory, if
115 * present. (If the root directory is not present, we will
116 * create it in pass 3.)
117 */
118 dir = e2fsck_get_dir_info(ctx, EXT2_ROOT_INO);
119 if (dir)
120 dir->parent = EXT2_ROOT_INO;
121
122 cd.buf = buf;
123 cd.ctx = ctx;
124 cd.count = 1;
125 cd.max = ext2fs_dblist_count(fs->dblist);
126
127 if (ctx->progress)
128 (void) (ctx->progress)(ctx, 2, 0, cd.max);
129
130 cd.pctx.errcode = ext2fs_dblist_iterate(fs->dblist, check_dir_block,
131 &cd);
132 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
133 return;
134 if (cd.pctx.errcode) {
135 fix_problem(ctx, PR_2_DBLIST_ITERATE, &cd.pctx);
136 ctx->flags |= E2F_FLAG_ABORT;
137 return;
138 }
139
140 ext2fs_free_mem((void **) &buf);
141 ext2fs_free_dblist(fs->dblist);
142
143 if (ctx->inode_bad_map) {
144 ext2fs_free_inode_bitmap(ctx->inode_bad_map);
145 ctx->inode_bad_map = 0;
146 }
147 if (ctx->inode_reg_map) {
148 ext2fs_free_inode_bitmap(ctx->inode_reg_map);
149 ctx->inode_reg_map = 0;
150 }
151
152 clear_problem_context(&pctx);
153 if (ctx->large_files) {
154 if (!(sb->s_feature_ro_compat &
155 EXT2_FEATURE_RO_COMPAT_LARGE_FILE) &&
156 fix_problem(ctx, PR_2_FEATURE_LARGE_FILES, &pctx)) {
157 sb->s_feature_ro_compat |=
158 EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
159 ext2fs_mark_super_dirty(fs);
160 }
161 if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
162 fix_problem(ctx, PR_1_FS_REV_LEVEL, &pctx)) {
163 ext2fs_update_dynamic_rev(fs);
164 ext2fs_mark_super_dirty(fs);
165 }
166 } else if (!ctx->large_files &&
167 (sb->s_feature_ro_compat &
168 EXT2_FEATURE_RO_COMPAT_LARGE_FILE)) {
169 if (fs->flags & EXT2_FLAG_RW) {
170 sb->s_feature_ro_compat &=
171 ~EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
172 ext2fs_mark_super_dirty(fs);
173 }
174 }
175
176 #ifdef RESOURCE_TRACK
177 if (ctx->options & E2F_OPT_TIME2) {
178 e2fsck_clear_progbar(ctx);
179 print_resource_track("Pass 2", &rtrack);
180 }
181 #endif
182 }
183
184 /*
185 * Make sure the first entry in the directory is '.', and that the
186 * directory entry is sane.
187 */
188 static int check_dot(e2fsck_t ctx,
189 struct ext2_dir_entry *dirent,
190 ext2_ino_t ino, struct problem_context *pctx)
191 {
192 struct ext2_dir_entry *nextdir;
193 int status = 0;
194 int created = 0;
195 int new_len;
196 int problem = 0;
197
198 if (!dirent->inode)
199 problem = PR_2_MISSING_DOT;
200 else if (((dirent->name_len & 0xFF) != 1) ||
201 (dirent->name[0] != '.'))
202 problem = PR_2_1ST_NOT_DOT;
203 else if (dirent->name[1] != '\0')
204 problem = PR_2_DOT_NULL_TERM;
205
206 if (problem) {
207 if (fix_problem(ctx, problem, pctx)) {
208 if (dirent->rec_len < 12)
209 dirent->rec_len = 12;
210 dirent->inode = ino;
211 dirent->name_len = 1;
212 dirent->name[0] = '.';
213 dirent->name[1] = '\0';
214 status = 1;
215 created = 1;
216 }
217 }
218 if (dirent->inode != ino) {
219 if (fix_problem(ctx, PR_2_BAD_INODE_DOT, pctx)) {
220 dirent->inode = ino;
221 status = 1;
222 }
223 }
224 if (dirent->rec_len > 12) {
225 new_len = dirent->rec_len - 12;
226 if (new_len > 12) {
227 if (created ||
228 fix_problem(ctx, PR_2_SPLIT_DOT, pctx)) {
229 nextdir = (struct ext2_dir_entry *)
230 ((char *) dirent + 12);
231 dirent->rec_len = 12;
232 nextdir->rec_len = new_len;
233 nextdir->inode = 0;
234 nextdir->name_len = 0;
235 status = 1;
236 }
237 }
238 }
239 return status;
240 }
241
242 /*
243 * Make sure the second entry in the directory is '..', and that the
244 * directory entry is sane. We do not check the inode number of '..'
245 * here; this gets done in pass 3.
246 */
247 static int check_dotdot(e2fsck_t ctx,
248 struct ext2_dir_entry *dirent,
249 struct dir_info *dir, struct problem_context *pctx)
250 {
251 int problem = 0;
252
253 if (!dirent->inode)
254 problem = PR_2_MISSING_DOT_DOT;
255 else if (((dirent->name_len & 0xFF) != 2) ||
256 (dirent->name[0] != '.') ||
257 (dirent->name[1] != '.'))
258 problem = PR_2_2ND_NOT_DOT_DOT;
259 else if (dirent->name[2] != '\0')
260 problem = PR_2_DOT_DOT_NULL_TERM;
261
262 if (problem) {
263 if (fix_problem(ctx, problem, pctx)) {
264 if (dirent->rec_len < 12)
265 dirent->rec_len = 12;
266 /*
267 * Note: we don't have the parent inode just
268 * yet, so we will fill it in with the root
269 * inode. This will get fixed in pass 3.
270 */
271 dirent->inode = EXT2_ROOT_INO;
272 dirent->name_len = 2;
273 dirent->name[0] = '.';
274 dirent->name[1] = '.';
275 dirent->name[2] = '\0';
276 return 1;
277 }
278 return 0;
279 }
280 dir->dotdot = dirent->inode;
281 return 0;
282 }
283
284 /*
285 * Check to make sure a directory entry doesn't contain any illegal
286 * characters.
287 */
288 static int check_name(e2fsck_t ctx,
289 struct ext2_dir_entry *dirent,
290 ext2_ino_t dir_ino, struct problem_context *pctx)
291 {
292 int i;
293 int fixup = -1;
294 int ret = 0;
295
296 for ( i = 0; i < (dirent->name_len & 0xFF); i++) {
297 if (dirent->name[i] == '/' || dirent->name[i] == '\0') {
298 if (fixup < 0) {
299 fixup = fix_problem(ctx, PR_2_BAD_NAME, pctx);
300 }
301 if (fixup) {
302 dirent->name[i] = '.';
303 ret = 1;
304 }
305 }
306 }
307 return ret;
308 }
309
310 /*
311 * Check the directory filetype (if present)
312 */
313 static _INLINE_ int check_filetype(e2fsck_t ctx,
314 struct ext2_dir_entry *dirent,
315 ext2_ino_t dir_ino, struct problem_context *pctx)
316 {
317 int filetype = dirent->name_len >> 8;
318 int should_be = EXT2_FT_UNKNOWN;
319 struct ext2_inode inode;
320
321 if (!(ctx->fs->super->s_feature_incompat &
322 EXT2_FEATURE_INCOMPAT_FILETYPE)) {
323 if (filetype == 0 ||
324 !fix_problem(ctx, PR_2_CLEAR_FILETYPE, pctx))
325 return 0;
326 dirent->name_len = dirent->name_len & 0xFF;
327 return 1;
328 }
329
330 if (ext2fs_test_inode_bitmap(ctx->inode_dir_map, dirent->inode)) {
331 should_be = EXT2_FT_DIR;
332 } else if (ext2fs_test_inode_bitmap(ctx->inode_reg_map,
333 dirent->inode)) {
334 should_be = EXT2_FT_REG_FILE;
335 } else if (ctx->inode_bad_map &&
336 ext2fs_test_inode_bitmap(ctx->inode_bad_map,
337 dirent->inode))
338 should_be = 0;
339 else {
340 e2fsck_read_inode(ctx, dirent->inode, &inode,
341 "check_filetype");
342 should_be = ext2_file_type(inode.i_mode);
343 }
344 if (filetype == should_be)
345 return 0;
346 pctx->num = should_be;
347
348 if (fix_problem(ctx, filetype ? PR_2_BAD_FILETYPE : PR_2_SET_FILETYPE,
349 pctx) == 0)
350 return 0;
351
352 dirent->name_len = (dirent->name_len & 0xFF) | should_be << 8;
353 return 1;
354 }
355
356
357 static int check_dir_block(ext2_filsys fs,
358 struct ext2_db_entry *db,
359 void *priv_data)
360 {
361 struct dir_info *subdir, *dir;
362 struct ext2_dir_entry *dirent;
363 int offset = 0;
364 int dir_modified = 0;
365 int dot_state;
366 blk_t block_nr = db->blk;
367 ext2_ino_t ino = db->ino;
368 __u16 links;
369 struct check_dir_struct *cd;
370 char *buf;
371 e2fsck_t ctx;
372 int problem;
373
374 cd = (struct check_dir_struct *) priv_data;
375 buf = cd->buf;
376 ctx = cd->ctx;
377
378 if (ctx->progress)
379 if ((ctx->progress)(ctx, 2, cd->count++, cd->max))
380 return DIRENT_ABORT;
381
382 /*
383 * Make sure the inode is still in use (could have been
384 * deleted in the duplicate/bad blocks pass.
385 */
386 if (!(ext2fs_test_inode_bitmap(ctx->inode_used_map, ino)))
387 return 0;
388
389 cd->pctx.ino = ino;
390 cd->pctx.blk = block_nr;
391 cd->pctx.blkcount = db->blockcnt;
392 cd->pctx.ino2 = 0;
393 cd->pctx.dirent = 0;
394 cd->pctx.num = 0;
395
396 if (db->blk == 0) {
397 if (allocate_dir_block(ctx, db, buf, &cd->pctx))
398 return 0;
399 block_nr = db->blk;
400 }
401
402 if (db->blockcnt)
403 dot_state = 2;
404 else
405 dot_state = 0;
406
407 #if 0
408 printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr,
409 db->blockcnt, ino);
410 #endif
411
412 cd->pctx.errcode = ext2fs_read_dir_block(fs, block_nr, buf);
413 if (cd->pctx.errcode == EXT2_ET_DIR_CORRUPTED)
414 cd->pctx.errcode = 0; /* We'll handle this ourselves */
415 if (cd->pctx.errcode) {
416 if (!fix_problem(ctx, PR_2_READ_DIRBLOCK, &cd->pctx)) {
417 ctx->flags |= E2F_FLAG_ABORT;
418 return DIRENT_ABORT;
419 }
420 memset(buf, 0, fs->blocksize);
421 }
422
423 do {
424 dot_state++;
425 problem = 0;
426 dirent = (struct ext2_dir_entry *) (buf + offset);
427 cd->pctx.dirent = dirent;
428 cd->pctx.num = offset;
429 if (((offset + dirent->rec_len) > fs->blocksize) ||
430 (dirent->rec_len < 12) ||
431 ((dirent->rec_len % 4) != 0) ||
432 (((dirent->name_len & 0xFF)+8) > dirent->rec_len)) {
433 if (fix_problem(ctx, PR_2_DIR_CORRUPTED, &cd->pctx)) {
434 dirent->rec_len = fs->blocksize - offset;
435 dirent->name_len = 0;
436 dirent->inode = 0;
437 dir_modified++;
438 } else
439 return DIRENT_ABORT;
440 }
441 if ((dirent->name_len & 0xFF) > EXT2_NAME_LEN) {
442 if (fix_problem(ctx, PR_2_FILENAME_LONG, &cd->pctx)) {
443 dirent->name_len = EXT2_NAME_LEN;
444 dir_modified++;
445 }
446 }
447
448 if (dot_state == 1) {
449 if (check_dot(ctx, dirent, ino, &cd->pctx))
450 dir_modified++;
451 } else if (dot_state == 2) {
452 dir = e2fsck_get_dir_info(ctx, ino);
453 if (!dir) {
454 fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
455 ctx->flags |= E2F_FLAG_ABORT;
456 return DIRENT_ABORT;
457 }
458 if (check_dotdot(ctx, dirent, dir, &cd->pctx))
459 dir_modified++;
460 } else if (dirent->inode == ino) {
461 problem = PR_2_LINK_DOT;
462 if (fix_problem(ctx, PR_2_LINK_DOT, &cd->pctx)) {
463 dirent->inode = 0;
464 dir_modified++;
465 goto next;
466 }
467 }
468 if (!dirent->inode)
469 goto next;
470
471 /*
472 * Make sure the inode listed is a legal one.
473 */
474 if (((dirent->inode != EXT2_ROOT_INO) &&
475 (dirent->inode < EXT2_FIRST_INODE(fs->super))) ||
476 (dirent->inode > fs->super->s_inodes_count)) {
477 problem = PR_2_BAD_INO;
478 } else if (!(ext2fs_test_inode_bitmap(ctx->inode_used_map,
479 dirent->inode))) {
480 /*
481 * If the inode is unused, offer to clear it.
482 */
483 problem = PR_2_UNUSED_INODE;
484 } else if (ctx->inode_bb_map &&
485 (ext2fs_test_inode_bitmap(ctx->inode_bb_map,
486 dirent->inode))) {
487 /*
488 * If the inode is in a bad block, offer to
489 * clear it.
490 */
491 problem = PR_2_BB_INODE;
492 } else if ((dot_state > 2) &&
493 ((dirent->name_len & 0xFF) == 1) &&
494 (dirent->name[0] == '.')) {
495 /*
496 * If there's a '.' entry in anything other
497 * than the first directory entry, it's a
498 * duplicate entry that should be removed.
499 */
500 problem = PR_2_DUP_DOT;
501 } else if ((dot_state > 2) &&
502 ((dirent->name_len & 0xFF) == 2) &&
503 (dirent->name[0] == '.') &&
504 (dirent->name[1] == '.')) {
505 /*
506 * If there's a '..' entry in anything other
507 * than the second directory entry, it's a
508 * duplicate entry that should be removed.
509 */
510 problem = PR_2_DUP_DOT_DOT;
511 } else if ((dot_state > 2) &&
512 (dirent->inode == EXT2_ROOT_INO)) {
513 /*
514 * Don't allow links to the root directory.
515 * We check this specially to make sure we
516 * catch this error case even if the root
517 * directory hasn't been created yet.
518 */
519 problem = PR_2_LINK_ROOT;
520 } else if ((dot_state > 2) &&
521 (dirent->name_len & 0xFF) == 0) {
522 /*
523 * Don't allow zero-length directory names.
524 */
525 problem = PR_2_NULL_NAME;
526 }
527
528 if (problem) {
529 if (fix_problem(ctx, problem, &cd->pctx)) {
530 dirent->inode = 0;
531 dir_modified++;
532 goto next;
533 } else {
534 ext2fs_unmark_valid(fs);
535 if (problem == PR_2_BAD_INO)
536 goto next;
537 }
538 }
539
540 /*
541 * If the inode was marked as having bad fields in
542 * pass1, process it and offer to fix/clear it.
543 * (We wait until now so that we can display the
544 * pathname to the user.)
545 */
546 if (ctx->inode_bad_map &&
547 ext2fs_test_inode_bitmap(ctx->inode_bad_map,
548 dirent->inode)) {
549 if (e2fsck_process_bad_inode(ctx, ino,
550 dirent->inode,
551 buf + fs->blocksize)) {
552 dirent->inode = 0;
553 dir_modified++;
554 goto next;
555 }
556 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
557 return DIRENT_ABORT;
558 }
559
560 if (check_name(ctx, dirent, ino, &cd->pctx))
561 dir_modified++;
562
563 if (check_filetype(ctx, dirent, ino, &cd->pctx))
564 dir_modified++;
565
566 /*
567 * If this is a directory, then mark its parent in its
568 * dir_info structure. If the parent field is already
569 * filled in, then this directory has more than one
570 * hard link. We assume the first link is correct,
571 * and ask the user if he/she wants to clear this one.
572 */
573 if ((dot_state > 2) &&
574 (ext2fs_test_inode_bitmap(ctx->inode_dir_map,
575 dirent->inode))) {
576 subdir = e2fsck_get_dir_info(ctx, dirent->inode);
577 if (!subdir) {
578 cd->pctx.ino = dirent->inode;
579 fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
580 ctx->flags |= E2F_FLAG_ABORT;
581 return DIRENT_ABORT;
582 }
583 if (subdir->parent) {
584 cd->pctx.ino2 = subdir->parent;
585 if (fix_problem(ctx, PR_2_LINK_DIR,
586 &cd->pctx)) {
587 dirent->inode = 0;
588 dir_modified++;
589 goto next;
590 }
591 cd->pctx.ino2 = 0;
592 } else
593 subdir->parent = ino;
594 }
595
596 ext2fs_icount_increment(ctx->inode_count, dirent->inode,
597 &links);
598 if (links > 1)
599 ctx->fs_links_count++;
600 ctx->fs_total_count++;
601 next:
602 offset += dirent->rec_len;
603 } while (offset < fs->blocksize);
604 #if 0
605 printf("\n");
606 #endif
607 if (offset != fs->blocksize) {
608 cd->pctx.num = dirent->rec_len - fs->blocksize + offset;
609 if (fix_problem(ctx, PR_2_FINAL_RECLEN, &cd->pctx)) {
610 dirent->rec_len = cd->pctx.num;
611 dir_modified++;
612 }
613 }
614 if (dir_modified) {
615 cd->pctx.errcode = ext2fs_write_dir_block(fs, block_nr, buf);
616 if (cd->pctx.errcode) {
617 if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK,
618 &cd->pctx)) {
619 ctx->flags |= E2F_FLAG_ABORT;
620 return DIRENT_ABORT;
621 }
622 }
623 ext2fs_mark_changed(fs);
624 }
625 return 0;
626 }
627
628 /*
629 * This function is called to deallocate a block, and is an interator
630 * functioned called by deallocate inode via ext2fs_iterate_block().
631 */
632 static int deallocate_inode_block(ext2_filsys fs,
633 blk_t *block_nr,
634 e2_blkcnt_t blockcnt,
635 blk_t ref_block,
636 int ref_offset,
637 void *priv_data)
638 {
639 e2fsck_t ctx = (e2fsck_t) priv_data;
640
641 if (HOLE_BLKADDR(*block_nr))
642 return 0;
643 ext2fs_unmark_block_bitmap(ctx->block_found_map, *block_nr);
644 ext2fs_unmark_block_bitmap(fs->block_map, *block_nr);
645 return 0;
646 }
647
648 /*
649 * This fuction deallocates an inode
650 */
651 static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
652 {
653 ext2_filsys fs = ctx->fs;
654 struct ext2_inode inode;
655 struct problem_context pctx;
656
657 ext2fs_icount_store(ctx->inode_link_info, ino, 0);
658 e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
659 inode.i_links_count = 0;
660 inode.i_dtime = time(0);
661 e2fsck_write_inode(ctx, ino, &inode, "deallocate_inode");
662 clear_problem_context(&pctx);
663 pctx.ino = ino;
664
665 /*
666 * Fix up the bitmaps...
667 */
668 e2fsck_read_bitmaps(ctx);
669 ext2fs_unmark_inode_bitmap(ctx->inode_used_map, ino);
670 ext2fs_unmark_inode_bitmap(ctx->inode_dir_map, ino);
671 if (ctx->inode_bad_map)
672 ext2fs_unmark_inode_bitmap(ctx->inode_bad_map, ino);
673 ext2fs_unmark_inode_bitmap(fs->inode_map, ino);
674 ext2fs_mark_ib_dirty(fs);
675
676 if (!ext2fs_inode_has_valid_blocks(&inode))
677 return;
678
679 if (LINUX_S_ISREG(inode.i_mode) &&
680 (inode.i_size_high || inode.i_size & 0x80000000UL))
681 ctx->large_files--;
682
683 if (inode.i_file_acl) {
684 ext2fs_unmark_block_bitmap(ctx->block_found_map,
685 inode.i_file_acl);
686 ext2fs_unmark_block_bitmap(fs->block_map, inode.i_file_acl);
687 }
688
689 ext2fs_mark_bb_dirty(fs);
690 pctx.errcode = ext2fs_block_iterate2(fs, ino, 0, block_buf,
691 deallocate_inode_block, ctx);
692 if (pctx.errcode) {
693 fix_problem(ctx, PR_2_DEALLOC_INODE, &pctx);
694 ctx->flags |= E2F_FLAG_ABORT;
695 return;
696 }
697 }
698
699 extern int e2fsck_process_bad_inode(e2fsck_t ctx, ext2_ino_t dir,
700 ext2_ino_t ino, char *buf)
701 {
702 ext2_filsys fs = ctx->fs;
703 struct ext2_inode inode;
704 int inode_modified = 0;
705 unsigned char *frag, *fsize;
706 struct problem_context pctx;
707 int problem = 0;
708
709 e2fsck_read_inode(ctx, ino, &inode, "process_bad_inode");
710
711 clear_problem_context(&pctx);
712 pctx.ino = ino;
713 pctx.dir = dir;
714 pctx.inode = &inode;
715
716 if (!LINUX_S_ISDIR(inode.i_mode) && !LINUX_S_ISREG(inode.i_mode) &&
717 !LINUX_S_ISCHR(inode.i_mode) && !LINUX_S_ISBLK(inode.i_mode) &&
718 !LINUX_S_ISLNK(inode.i_mode) && !LINUX_S_ISFIFO(inode.i_mode) &&
719 !(LINUX_S_ISSOCK(inode.i_mode)))
720 problem = PR_2_BAD_MODE;
721 else if (LINUX_S_ISCHR(inode.i_mode)
722 && !e2fsck_pass1_check_device_inode(&inode))
723 problem = PR_2_BAD_CHAR_DEV;
724 else if (LINUX_S_ISBLK(inode.i_mode)
725 && !e2fsck_pass1_check_device_inode(&inode))
726 problem = PR_2_BAD_BLOCK_DEV;
727 else if (LINUX_S_ISFIFO(inode.i_mode)
728 && !e2fsck_pass1_check_device_inode(&inode))
729 problem = PR_2_BAD_FIFO;
730 else if (LINUX_S_ISSOCK(inode.i_mode)
731 && !e2fsck_pass1_check_device_inode(&inode))
732 problem = PR_2_BAD_SOCKET;
733 else if (LINUX_S_ISLNK(inode.i_mode)
734 && !e2fsck_pass1_check_symlink(fs, &inode, buf)) {
735 problem = PR_2_INVALID_SYMLINK;
736 }
737
738 if (problem) {
739 if (fix_problem(ctx, problem, &pctx)) {
740 deallocate_inode(ctx, ino, 0);
741 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
742 return 0;
743 return 1;
744 }
745 problem = 0;
746 }
747
748 if (inode.i_faddr &&
749 fix_problem(ctx, PR_2_FADDR_ZERO, &pctx)) {
750 inode.i_faddr = 0;
751 inode_modified++;
752 }
753
754 switch (fs->super->s_creator_os) {
755 case EXT2_OS_LINUX:
756 frag = &inode.osd2.linux2.l_i_frag;
757 fsize = &inode.osd2.linux2.l_i_fsize;
758 break;
759 case EXT2_OS_HURD:
760 frag = &inode.osd2.hurd2.h_i_frag;
761 fsize = &inode.osd2.hurd2.h_i_fsize;
762 break;
763 case EXT2_OS_MASIX:
764 frag = &inode.osd2.masix2.m_i_frag;
765 fsize = &inode.osd2.masix2.m_i_fsize;
766 break;
767 default:
768 frag = fsize = 0;
769 }
770 if (frag && *frag) {
771 pctx.num = *frag;
772 if (fix_problem(ctx, PR_2_FRAG_ZERO, &pctx)) {
773 *frag = 0;
774 inode_modified++;
775 }
776 pctx.num = 0;
777 }
778 if (fsize && *fsize) {
779 pctx.num = *fsize;
780 if (fix_problem(ctx, PR_2_FSIZE_ZERO, &pctx)) {
781 *fsize = 0;
782 inode_modified++;
783 }
784 pctx.num = 0;
785 }
786
787 if (inode.i_file_acl &&
788 !(fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR) &&
789 fix_problem(ctx, PR_2_FILE_ACL_ZERO, &pctx)) {
790 inode.i_file_acl = 0;
791 inode_modified++;
792 }
793 if (inode.i_file_acl &&
794 ((inode.i_file_acl < fs->super->s_first_data_block) ||
795 (inode.i_file_acl >= fs->super->s_blocks_count)) &&
796 fix_problem(ctx, PR_2_FILE_ACL_BAD, &pctx)) {
797 inode.i_file_acl = 0;
798 inode_modified++;
799 }
800 if (inode.i_dir_acl &&
801 LINUX_S_ISDIR(inode.i_mode) &&
802 fix_problem(ctx, PR_2_DIR_ACL_ZERO, &pctx)) {
803 inode.i_dir_acl = 0;
804 inode_modified++;
805 }
806 if (inode_modified)
807 e2fsck_write_inode(ctx, ino, &inode, "process_bad_inode");
808 return 0;
809 }
810
811
812 /*
813 * allocate_dir_block --- this function allocates a new directory
814 * block for a particular inode; this is done if a directory has
815 * a "hole" in it, or if a directory has a illegal block number
816 * that was zeroed out and now needs to be replaced.
817 */
818 static int allocate_dir_block(e2fsck_t ctx,
819 struct ext2_db_entry *db,
820 char *buf, struct problem_context *pctx)
821 {
822 ext2_filsys fs = ctx->fs;
823 blk_t blk;
824 char *block;
825 struct ext2_inode inode;
826
827 if (fix_problem(ctx, PR_2_DIRECTORY_HOLE, pctx) == 0)
828 return 1;
829
830 /*
831 * Read the inode and block bitmaps in; we'll be messing with
832 * them.
833 */
834 e2fsck_read_bitmaps(ctx);
835
836 /*
837 * First, find a free block
838 */
839 pctx->errcode = ext2fs_new_block(fs, 0, ctx->block_found_map, &blk);
840 if (pctx->errcode) {
841 pctx->str = "ext2fs_new_block";
842 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
843 return 1;
844 }
845 ext2fs_mark_block_bitmap(ctx->block_found_map, blk);
846 ext2fs_mark_block_bitmap(fs->block_map, blk);
847 ext2fs_mark_bb_dirty(fs);
848
849 /*
850 * Now let's create the actual data block for the inode
851 */
852 if (db->blockcnt)
853 pctx->errcode = ext2fs_new_dir_block(fs, 0, 0, &block);
854 else
855 pctx->errcode = ext2fs_new_dir_block(fs, db->ino,
856 EXT2_ROOT_INO, &block);
857
858 if (pctx->errcode) {
859 pctx->str = "ext2fs_new_dir_block";
860 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
861 return 1;
862 }
863
864 pctx->errcode = ext2fs_write_dir_block(fs, blk, block);
865 ext2fs_free_mem((void **) &block);
866 if (pctx->errcode) {
867 pctx->str = "ext2fs_write_dir_block";
868 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
869 return 1;
870 }
871
872 /*
873 * Update the inode block count
874 */
875 e2fsck_read_inode(ctx, db->ino, &inode, "allocate_dir_block");
876 inode.i_blocks += fs->blocksize / 512;
877 if (inode.i_size < (db->blockcnt+1) * fs->blocksize)
878 inode.i_size = (db->blockcnt+1) * fs->blocksize;
879 e2fsck_write_inode(ctx, db->ino, &inode, "allocate_dir_block");
880
881 /*
882 * Finally, update the block pointers for the inode
883 */
884 db->blk = blk;
885 pctx->errcode = ext2fs_block_iterate2(fs, db->ino, BLOCK_FLAG_HOLE,
886 0, update_dir_block, db);
887 if (pctx->errcode) {
888 pctx->str = "ext2fs_block_iterate";
889 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
890 return 1;
891 }
892
893 return 0;
894 }
895
896 /*
897 * This is a helper function for allocate_dir_block().
898 */
899 static int update_dir_block(ext2_filsys fs,
900 blk_t *block_nr,
901 e2_blkcnt_t blockcnt,
902 blk_t ref_block,
903 int ref_offset,
904 void *priv_data)
905 {
906 struct ext2_db_entry *db;
907
908 db = (struct ext2_db_entry *) priv_data;
909 if (db->blockcnt == (int) blockcnt) {
910 *block_nr = db->blk;
911 return BLOCK_CHANGED;
912 }
913 return 0;
914 }
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