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 #define _GNU_SOURCE 1 /* get strnlen() */
45 #include "config.h"
46 #include <string.h>
47
48 #include "e2fsck.h"
49 #include "problem.h"
50 #include "support/dict.h"
51
52 #ifdef NO_INLINE_FUNCS
53 #define _INLINE_
54 #else
55 #define _INLINE_ inline
56 #endif
57
58 /* #define DX_DEBUG */
59
60 /*
61 * Keeps track of how many times an inode is referenced.
62 */
63 static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf);
64 static int check_dir_block2(ext2_filsys fs,
65 struct ext2_db_entry2 *dir_blocks_info,
66 void *priv_data);
67 static int check_dir_block(ext2_filsys fs,
68 struct ext2_db_entry2 *dir_blocks_info,
69 void *priv_data);
70 static int allocate_dir_block(e2fsck_t ctx,
71 struct ext2_db_entry2 *dir_blocks_info,
72 char *buf, struct problem_context *pctx);
73 static void clear_htree(e2fsck_t ctx, ext2_ino_t ino);
74 static int htree_depth(struct dx_dir_info *dx_dir,
75 struct dx_dirblock_info *dx_db);
76 static EXT2_QSORT_TYPE special_dir_block_cmp(const void *a, const void *b);
77
78 struct check_dir_struct {
79 char *buf;
80 struct problem_context pctx;
81 int count, max;
82 e2fsck_t ctx;
83 unsigned long long list_offset;
84 unsigned long long ra_entries;
85 unsigned long long next_ra_off;
86 };
87
update_parents(struct dx_dir_info * dx_dir,int type)88 static void update_parents(struct dx_dir_info *dx_dir, int type)
89 {
90 struct dx_dirblock_info *dx_db, *dx_parent, *dx_previous;
91 int b;
92
93 for (b = 0, dx_db = dx_dir->dx_block;
94 b < dx_dir->numblocks;
95 b++, dx_db++) {
96 dx_parent = &dx_dir->dx_block[dx_db->parent];
97 if (dx_db->type != type)
98 continue;
99
100 /*
101 * XXX Make sure dx_parent->min_hash > dx_db->min_hash
102 */
103 if (dx_db->flags & DX_FLAG_FIRST) {
104 dx_parent->min_hash = dx_db->min_hash;
105 if (dx_parent->previous) {
106 dx_previous =
107 &dx_dir->dx_block[dx_parent->previous];
108 dx_previous->node_max_hash =
109 dx_parent->min_hash;
110 }
111 }
112 /*
113 * XXX Make sure dx_parent->max_hash < dx_db->max_hash
114 */
115 if (dx_db->flags & DX_FLAG_LAST) {
116 dx_parent->max_hash = dx_db->max_hash;
117 }
118 }
119 }
120
e2fsck_pass2(e2fsck_t ctx)121 void e2fsck_pass2(e2fsck_t ctx)
122 {
123 struct ext2_super_block *sb = ctx->fs->super;
124 struct problem_context pctx;
125 ext2_filsys fs = ctx->fs;
126 char *buf = NULL;
127 #ifdef RESOURCE_TRACK
128 struct resource_track rtrack;
129 #endif
130 struct check_dir_struct cd;
131 struct dx_dir_info *dx_dir;
132 struct dx_dirblock_info *dx_db;
133 int b;
134 int i, depth;
135 problem_t code;
136 int bad_dir;
137 int (*check_dir_func)(ext2_filsys fs,
138 struct ext2_db_entry2 *dir_blocks_info,
139 void *priv_data);
140
141 init_resource_track(&rtrack, ctx->fs->io);
142 clear_problem_context(&cd.pctx);
143
144 #ifdef MTRACE
145 mtrace_print("Pass 2");
146 #endif
147
148 if (!(ctx->options & E2F_OPT_PREEN))
149 fix_problem(ctx, PR_2_PASS_HEADER, &cd.pctx);
150
151 cd.pctx.errcode = e2fsck_setup_icount(ctx, "inode_count",
152 EXT2_ICOUNT_OPT_INCREMENT,
153 ctx->inode_link_info, &ctx->inode_count);
154 if (cd.pctx.errcode) {
155 fix_problem(ctx, PR_2_ALLOCATE_ICOUNT, &cd.pctx);
156 ctx->flags |= E2F_FLAG_ABORT;
157 goto cleanup;
158 }
159 buf = (char *) e2fsck_allocate_memory(ctx, 2*fs->blocksize,
160 "directory scan buffer");
161
162 /*
163 * Set up the parent pointer for the root directory, if
164 * present. (If the root directory is not present, we will
165 * create it in pass 3.)
166 */
167 (void) e2fsck_dir_info_set_parent(ctx, EXT2_ROOT_INO, EXT2_ROOT_INO);
168
169 cd.buf = buf;
170 cd.ctx = ctx;
171 cd.count = 1;
172 cd.max = ext2fs_dblist_count2(fs->dblist);
173 cd.list_offset = 0;
174 cd.ra_entries = ctx->readahead_kb * 1024 / ctx->fs->blocksize;
175 cd.next_ra_off = 0;
176
177 if (ctx->progress)
178 (void) (ctx->progress)(ctx, 2, 0, cd.max);
179
180 if (ext2fs_has_feature_dir_index(fs->super))
181 ext2fs_dblist_sort2(fs->dblist, special_dir_block_cmp);
182
183 check_dir_func = cd.ra_entries ? check_dir_block2 : check_dir_block;
184 cd.pctx.errcode = ext2fs_dblist_iterate2(fs->dblist, check_dir_func,
185 &cd);
186 if (ctx->flags & E2F_FLAG_RESTART_LATER) {
187 ctx->flags |= E2F_FLAG_RESTART;
188 ctx->flags &= ~E2F_FLAG_RESTART_LATER;
189 }
190
191 if (ctx->flags & E2F_FLAG_RUN_RETURN)
192 goto cleanup;
193
194 if (cd.pctx.errcode) {
195 fix_problem(ctx, PR_2_DBLIST_ITERATE, &cd.pctx);
196 ctx->flags |= E2F_FLAG_ABORT;
197 goto cleanup;
198 }
199
200 for (i=0; (dx_dir = e2fsck_dx_dir_info_iter(ctx, &i)) != 0;) {
201 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
202 goto cleanup;
203 if (e2fsck_dir_will_be_rehashed(ctx, dx_dir->ino) ||
204 dx_dir->numblocks == 0)
205 continue;
206 clear_problem_context(&pctx);
207 bad_dir = 0;
208 pctx.dir = dx_dir->ino;
209 dx_db = dx_dir->dx_block;
210 if (dx_db->flags & DX_FLAG_REFERENCED)
211 dx_db->flags |= DX_FLAG_DUP_REF;
212 else
213 dx_db->flags |= DX_FLAG_REFERENCED;
214 /*
215 * Find all of the first and last leaf blocks, and
216 * update their parent's min and max hash values
217 */
218 update_parents(dx_dir, DX_DIRBLOCK_LEAF);
219
220 /* for 3 level htree: update 2 level parent's min
221 * and max hash values */
222 update_parents(dx_dir, DX_DIRBLOCK_NODE);
223
224 for (b=0, dx_db = dx_dir->dx_block;
225 b < dx_dir->numblocks;
226 b++, dx_db++) {
227 pctx.blkcount = b;
228 pctx.group = dx_db->parent;
229 code = 0;
230 if (!(dx_db->flags & DX_FLAG_FIRST) &&
231 (dx_db->min_hash < dx_db->node_min_hash)) {
232 pctx.blk = dx_db->min_hash;
233 pctx.blk2 = dx_db->node_min_hash;
234 code = PR_2_HTREE_MIN_HASH;
235 fix_problem(ctx, code, &pctx);
236 bad_dir++;
237 }
238 if (dx_db->type == DX_DIRBLOCK_LEAF) {
239 depth = htree_depth(dx_dir, dx_db);
240 if (depth != dx_dir->depth) {
241 pctx.num = dx_dir->depth;
242 code = PR_2_HTREE_BAD_DEPTH;
243 fix_problem(ctx, code, &pctx);
244 bad_dir++;
245 }
246 }
247 /*
248 * This test doesn't apply for the root block
249 * at block #0
250 */
251 if (b &&
252 (dx_db->max_hash > dx_db->node_max_hash)) {
253 pctx.blk = dx_db->max_hash;
254 pctx.blk2 = dx_db->node_max_hash;
255 code = PR_2_HTREE_MAX_HASH;
256 fix_problem(ctx, code, &pctx);
257 bad_dir++;
258 }
259 if (!(dx_db->flags & DX_FLAG_REFERENCED)) {
260 code = PR_2_HTREE_NOTREF;
261 fix_problem(ctx, code, &pctx);
262 bad_dir++;
263 } else if (dx_db->flags & DX_FLAG_DUP_REF) {
264 code = PR_2_HTREE_DUPREF;
265 fix_problem(ctx, code, &pctx);
266 bad_dir++;
267 }
268 }
269 if (bad_dir && fix_problem(ctx, PR_2_HTREE_CLEAR, &pctx)) {
270 clear_htree(ctx, dx_dir->ino);
271 dx_dir->numblocks = 0;
272 }
273 }
274 e2fsck_free_dx_dir_info(ctx);
275
276 ext2fs_free_mem(&buf);
277 ext2fs_free_dblist(fs->dblist);
278
279 if (ctx->inode_bad_map) {
280 ext2fs_free_inode_bitmap(ctx->inode_bad_map);
281 ctx->inode_bad_map = 0;
282 }
283 if (ctx->inode_reg_map) {
284 ext2fs_free_inode_bitmap(ctx->inode_reg_map);
285 ctx->inode_reg_map = 0;
286 }
287 if (ctx->encrypted_dirs) {
288 ext2fs_u32_list_free(ctx->encrypted_dirs);
289 ctx->encrypted_dirs = 0;
290 }
291
292 clear_problem_context(&pctx);
293 if (ctx->large_files) {
294 if (!ext2fs_has_feature_large_file(sb) &&
295 fix_problem(ctx, PR_2_FEATURE_LARGE_FILES, &pctx)) {
296 ext2fs_set_feature_large_file(sb);
297 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
298 ext2fs_mark_super_dirty(fs);
299 }
300 if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
301 fix_problem(ctx, PR_1_FS_REV_LEVEL, &pctx)) {
302 ext2fs_update_dynamic_rev(fs);
303 ext2fs_mark_super_dirty(fs);
304 }
305 }
306
307 print_resource_track(ctx, _("Pass 2"), &rtrack, fs->io);
308 cleanup:
309 ext2fs_free_mem(&buf);
310 }
311
312 #define MAX_DEPTH 32000
htree_depth(struct dx_dir_info * dx_dir,struct dx_dirblock_info * dx_db)313 static int htree_depth(struct dx_dir_info *dx_dir,
314 struct dx_dirblock_info *dx_db)
315 {
316 int depth = 0;
317
318 while (dx_db->type != DX_DIRBLOCK_ROOT && depth < MAX_DEPTH) {
319 dx_db = &dx_dir->dx_block[dx_db->parent];
320 depth++;
321 }
322 return depth;
323 }
324
dict_de_cmp(const void * a,const void * b)325 static int dict_de_cmp(const void *a, const void *b)
326 {
327 const struct ext2_dir_entry *de_a, *de_b;
328 int a_len, b_len;
329
330 de_a = (const struct ext2_dir_entry *) a;
331 a_len = ext2fs_dirent_name_len(de_a);
332 de_b = (const struct ext2_dir_entry *) b;
333 b_len = ext2fs_dirent_name_len(de_b);
334
335 if (a_len != b_len)
336 return (a_len - b_len);
337
338 return memcmp(de_a->name, de_b->name, a_len);
339 }
340
341 /*
342 * This is special sort function that makes sure that directory blocks
343 * with a dirblock of zero are sorted to the beginning of the list.
344 * This guarantees that the root node of the htree directories are
345 * processed first, so we know what hash version to use.
346 */
special_dir_block_cmp(const void * a,const void * b)347 static EXT2_QSORT_TYPE special_dir_block_cmp(const void *a, const void *b)
348 {
349 const struct ext2_db_entry2 *db_a =
350 (const struct ext2_db_entry2 *) a;
351 const struct ext2_db_entry2 *db_b =
352 (const struct ext2_db_entry2 *) b;
353
354 if (db_a->blockcnt && !db_b->blockcnt)
355 return 1;
356
357 if (!db_a->blockcnt && db_b->blockcnt)
358 return -1;
359
360 if (db_a->blk != db_b->blk)
361 return (int) (db_a->blk - db_b->blk);
362
363 if (db_a->ino != db_b->ino)
364 return (int) (db_a->ino - db_b->ino);
365
366 return (int) (db_a->blockcnt - db_b->blockcnt);
367 }
368
369
370 /*
371 * Make sure the first entry in the directory is '.', and that the
372 * directory entry is sane.
373 */
check_dot(e2fsck_t ctx,struct ext2_dir_entry * dirent,ext2_ino_t ino,struct problem_context * pctx)374 static int check_dot(e2fsck_t ctx,
375 struct ext2_dir_entry *dirent,
376 ext2_ino_t ino, struct problem_context *pctx)
377 {
378 struct ext2_dir_entry *nextdir;
379 unsigned int rec_len, new_len;
380 int status = 0;
381 int created = 0;
382 problem_t problem = 0;
383
384 if (!dirent->inode)
385 problem = PR_2_MISSING_DOT;
386 else if ((ext2fs_dirent_name_len(dirent) != 1) ||
387 (dirent->name[0] != '.'))
388 problem = PR_2_1ST_NOT_DOT;
389 else if (dirent->name[1] != '\0')
390 problem = PR_2_DOT_NULL_TERM;
391
392 (void) ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
393 if (problem) {
394 if (fix_problem(ctx, problem, pctx)) {
395 if (rec_len < 12)
396 rec_len = dirent->rec_len = 12;
397 dirent->inode = ino;
398 ext2fs_dirent_set_name_len(dirent, 1);
399 ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN);
400 dirent->name[0] = '.';
401 dirent->name[1] = '\0';
402 status = 1;
403 created = 1;
404 }
405 }
406 if (dirent->inode != ino) {
407 if (fix_problem(ctx, PR_2_BAD_INODE_DOT, pctx)) {
408 dirent->inode = ino;
409 status = 1;
410 }
411 }
412 if (rec_len > 12) {
413 new_len = rec_len - 12;
414 if (new_len > 12) {
415 if (created ||
416 fix_problem(ctx, PR_2_SPLIT_DOT, pctx)) {
417 nextdir = (struct ext2_dir_entry *)
418 ((char *) dirent + 12);
419 dirent->rec_len = 12;
420 (void) ext2fs_set_rec_len(ctx->fs, new_len,
421 nextdir);
422 nextdir->inode = 0;
423 ext2fs_dirent_set_name_len(nextdir, 0);
424 ext2fs_dirent_set_file_type(nextdir,
425 EXT2_FT_UNKNOWN);
426 status = 1;
427 }
428 }
429 }
430 return status;
431 }
432
433 /*
434 * Make sure the second entry in the directory is '..', and that the
435 * directory entry is sane. We do not check the inode number of '..'
436 * here; this gets done in pass 3.
437 */
check_dotdot(e2fsck_t ctx,struct ext2_dir_entry * dirent,ext2_ino_t ino,struct problem_context * pctx)438 static int check_dotdot(e2fsck_t ctx,
439 struct ext2_dir_entry *dirent,
440 ext2_ino_t ino, struct problem_context *pctx)
441 {
442 problem_t problem = 0;
443 unsigned int rec_len;
444
445 if (!dirent->inode)
446 problem = PR_2_MISSING_DOT_DOT;
447 else if ((ext2fs_dirent_name_len(dirent) != 2) ||
448 (dirent->name[0] != '.') ||
449 (dirent->name[1] != '.'))
450 problem = PR_2_2ND_NOT_DOT_DOT;
451 else if (dirent->name[2] != '\0')
452 problem = PR_2_DOT_DOT_NULL_TERM;
453
454 (void) ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
455 if (problem) {
456 if (fix_problem(ctx, problem, pctx)) {
457 if (rec_len < 12)
458 dirent->rec_len = 12;
459 /*
460 * Note: we don't have the parent inode just
461 * yet, so we will fill it in with the root
462 * inode. This will get fixed in pass 3.
463 */
464 dirent->inode = EXT2_ROOT_INO;
465 ext2fs_dirent_set_name_len(dirent, 2);
466 ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN);
467 dirent->name[0] = '.';
468 dirent->name[1] = '.';
469 dirent->name[2] = '\0';
470 return 1;
471 }
472 return 0;
473 }
474 if (e2fsck_dir_info_set_dotdot(ctx, ino, dirent->inode)) {
475 fix_problem(ctx, PR_2_NO_DIRINFO, pctx);
476 return -1;
477 }
478 return 0;
479 }
480
481 /*
482 * Check to make sure a directory entry doesn't contain any illegal
483 * characters.
484 */
check_name(e2fsck_t ctx,struct ext2_dir_entry * dirent,struct problem_context * pctx)485 static int check_name(e2fsck_t ctx,
486 struct ext2_dir_entry *dirent,
487 struct problem_context *pctx)
488 {
489 int i;
490 int fixup = -1;
491 int ret = 0;
492
493 for ( i = 0; i < ext2fs_dirent_name_len(dirent); i++) {
494 if (dirent->name[i] != '/' && dirent->name[i] != '\0')
495 continue;
496 if (fixup < 0)
497 fixup = fix_problem(ctx, PR_2_BAD_NAME, pctx);
498 if (fixup == 0)
499 return 0;
500 dirent->name[i] = '.';
501 ret = 1;
502 }
503 return ret;
504 }
505
encrypted_check_name(e2fsck_t ctx,struct ext2_dir_entry * dirent,struct problem_context * pctx)506 static int encrypted_check_name(e2fsck_t ctx,
507 struct ext2_dir_entry *dirent,
508 struct problem_context *pctx)
509 {
510 if (ext2fs_dirent_name_len(dirent) < EXT4_CRYPTO_BLOCK_SIZE) {
511 if (fix_problem(ctx, PR_2_BAD_ENCRYPTED_NAME, pctx)) {
512 dirent->inode = 0;
513 return 1;
514 }
515 ext2fs_unmark_valid(ctx->fs);
516 }
517 return 0;
518 }
519
520 /*
521 * Check the directory filetype (if present)
522 */
check_filetype(e2fsck_t ctx,struct ext2_dir_entry * dirent,ext2_ino_t dir_ino EXT2FS_ATTR ((unused)),struct problem_context * pctx)523 static _INLINE_ int check_filetype(e2fsck_t ctx,
524 struct ext2_dir_entry *dirent,
525 ext2_ino_t dir_ino EXT2FS_ATTR((unused)),
526 struct problem_context *pctx)
527 {
528 int filetype = ext2fs_dirent_file_type(dirent);
529 int should_be = EXT2_FT_UNKNOWN;
530 struct ext2_inode inode;
531
532 if (!ext2fs_has_feature_filetype(ctx->fs->super)) {
533 if (filetype == 0 ||
534 !fix_problem(ctx, PR_2_CLEAR_FILETYPE, pctx))
535 return 0;
536 ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN);
537 return 1;
538 }
539
540 if (ext2fs_test_inode_bitmap2(ctx->inode_dir_map, dirent->inode)) {
541 should_be = EXT2_FT_DIR;
542 } else if (ext2fs_test_inode_bitmap2(ctx->inode_reg_map,
543 dirent->inode)) {
544 should_be = EXT2_FT_REG_FILE;
545 } else if (ctx->inode_bad_map &&
546 ext2fs_test_inode_bitmap2(ctx->inode_bad_map,
547 dirent->inode))
548 should_be = 0;
549 else {
550 e2fsck_read_inode(ctx, dirent->inode, &inode,
551 "check_filetype");
552 should_be = ext2_file_type(inode.i_mode);
553 }
554 if (filetype == should_be)
555 return 0;
556 pctx->num = should_be;
557
558 if (fix_problem(ctx, filetype ? PR_2_BAD_FILETYPE : PR_2_SET_FILETYPE,
559 pctx) == 0)
560 return 0;
561
562 ext2fs_dirent_set_file_type(dirent, should_be);
563 return 1;
564 }
565
parse_int_node(ext2_filsys fs,struct ext2_db_entry2 * db,struct check_dir_struct * cd,struct dx_dir_info * dx_dir,char * block_buf,int failed_csum)566 static void parse_int_node(ext2_filsys fs,
567 struct ext2_db_entry2 *db,
568 struct check_dir_struct *cd,
569 struct dx_dir_info *dx_dir,
570 char *block_buf, int failed_csum)
571 {
572 struct ext2_dx_root_info *root;
573 struct ext2_dx_entry *ent;
574 struct ext2_dx_countlimit *limit;
575 struct dx_dirblock_info *dx_db;
576 int i, expect_limit, count;
577 blk_t blk;
578 ext2_dirhash_t min_hash = 0xffffffff;
579 ext2_dirhash_t max_hash = 0;
580 ext2_dirhash_t hash = 0, prev_hash;
581 int csum_size = 0;
582
583 if (db->blockcnt == 0) {
584 root = (struct ext2_dx_root_info *) (block_buf + 24);
585
586 #ifdef DX_DEBUG
587 printf("Root node dump:\n");
588 printf("\t Reserved zero: %u\n", root->reserved_zero);
589 printf("\t Hash Version: %d\n", root->hash_version);
590 printf("\t Info length: %d\n", root->info_length);
591 printf("\t Indirect levels: %d\n", root->indirect_levels);
592 printf("\t Flags: %d\n", root->unused_flags);
593 #endif
594
595 ent = (struct ext2_dx_entry *) (block_buf + 24 + root->info_length);
596
597 if (failed_csum &&
598 (e2fsck_dir_will_be_rehashed(cd->ctx, cd->pctx.ino) ||
599 fix_problem(cd->ctx, PR_2_HTREE_ROOT_CSUM_INVALID,
600 &cd->pctx)))
601 goto clear_and_exit;
602 } else {
603 ent = (struct ext2_dx_entry *) (block_buf+8);
604
605 if (failed_csum &&
606 (e2fsck_dir_will_be_rehashed(cd->ctx, cd->pctx.ino) ||
607 fix_problem(cd->ctx, PR_2_HTREE_NODE_CSUM_INVALID,
608 &cd->pctx)))
609 goto clear_and_exit;
610 }
611
612 limit = (struct ext2_dx_countlimit *) ent;
613
614 #ifdef DX_DEBUG
615 printf("Number of entries (count): %d\n",
616 ext2fs_le16_to_cpu(limit->count));
617 printf("Number of entries (limit): %d\n",
618 ext2fs_le16_to_cpu(limit->limit));
619 #endif
620
621 count = ext2fs_le16_to_cpu(limit->count);
622 if (ext2fs_has_feature_metadata_csum(fs->super))
623 csum_size = sizeof(struct ext2_dx_tail);
624 expect_limit = (fs->blocksize -
625 (csum_size + ((char *) ent - block_buf))) /
626 sizeof(struct ext2_dx_entry);
627 if (ext2fs_le16_to_cpu(limit->limit) != expect_limit) {
628 cd->pctx.num = ext2fs_le16_to_cpu(limit->limit);
629 if (fix_problem(cd->ctx, PR_2_HTREE_BAD_LIMIT, &cd->pctx))
630 goto clear_and_exit;
631 }
632 if (count > expect_limit) {
633 cd->pctx.num = count;
634 if (fix_problem(cd->ctx, PR_2_HTREE_BAD_COUNT, &cd->pctx))
635 goto clear_and_exit;
636 count = expect_limit;
637 }
638
639 for (i=0; i < count; i++) {
640 prev_hash = hash;
641 hash = i ? (ext2fs_le32_to_cpu(ent[i].hash) & ~1) : 0;
642 #ifdef DX_DEBUG
643 printf("Entry #%d: Hash 0x%08x, block %u\n", i,
644 hash, ext2fs_le32_to_cpu(ent[i].block));
645 #endif
646 blk = ext2fs_le32_to_cpu(ent[i].block) & EXT4_DX_BLOCK_MASK;
647 /* Check to make sure the block is valid */
648 if (blk >= (blk_t) dx_dir->numblocks) {
649 cd->pctx.blk = blk;
650 if (fix_problem(cd->ctx, PR_2_HTREE_BADBLK,
651 &cd->pctx))
652 goto clear_and_exit;
653 continue;
654 }
655 if (hash < prev_hash &&
656 fix_problem(cd->ctx, PR_2_HTREE_HASH_ORDER, &cd->pctx))
657 goto clear_and_exit;
658 dx_db = &dx_dir->dx_block[blk];
659 if (dx_db->flags & DX_FLAG_REFERENCED) {
660 dx_db->flags |= DX_FLAG_DUP_REF;
661 } else {
662 dx_db->flags |= DX_FLAG_REFERENCED;
663 dx_db->parent = db->blockcnt;
664 }
665
666 dx_db->previous =
667 i ? (ext2fs_le32_to_cpu(ent[i-1].block) &
668 EXT4_DX_BLOCK_MASK) : 0;
669
670 if (hash < min_hash)
671 min_hash = hash;
672 if (hash > max_hash)
673 max_hash = hash;
674 dx_db->node_min_hash = hash;
675 if ((i+1) < count)
676 dx_db->node_max_hash =
677 ext2fs_le32_to_cpu(ent[i+1].hash) & ~1;
678 else {
679 dx_db->node_max_hash = 0xfffffffe;
680 dx_db->flags |= DX_FLAG_LAST;
681 }
682 if (i == 0)
683 dx_db->flags |= DX_FLAG_FIRST;
684 }
685 #ifdef DX_DEBUG
686 printf("Blockcnt = %d, min hash 0x%08x, max hash 0x%08x\n",
687 db->blockcnt, min_hash, max_hash);
688 #endif
689 dx_db = &dx_dir->dx_block[db->blockcnt];
690 dx_db->min_hash = min_hash;
691 dx_db->max_hash = max_hash;
692 return;
693
694 clear_and_exit:
695 clear_htree(cd->ctx, cd->pctx.ino);
696 dx_dir->numblocks = 0;
697 e2fsck_rehash_dir_later(cd->ctx, cd->pctx.ino);
698 }
699
700 /*
701 * Given a busted directory, try to salvage it somehow.
702 *
703 */
salvage_directory(ext2_filsys fs,struct ext2_dir_entry * dirent,struct ext2_dir_entry * prev,unsigned int * offset,unsigned int block_len)704 static void salvage_directory(ext2_filsys fs,
705 struct ext2_dir_entry *dirent,
706 struct ext2_dir_entry *prev,
707 unsigned int *offset,
708 unsigned int block_len)
709 {
710 char *cp = (char *) dirent;
711 int left;
712 unsigned int rec_len, prev_rec_len;
713 unsigned int name_len;
714
715 /*
716 * If the space left for the entry is too small to be an entry,
717 * we can't access dirent's fields, so plumb in the values needed
718 * so that the previous entry absorbs this one.
719 */
720 if (block_len - *offset < EXT2_DIR_ENTRY_HEADER_LEN) {
721 name_len = 0;
722 rec_len = block_len - *offset;
723 } else {
724 name_len = ext2fs_dirent_name_len(dirent);
725 (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
726 }
727 left = block_len - *offset - rec_len;
728
729 /*
730 * Special case of directory entry of size 8: copy what's left
731 * of the directory block up to cover up the invalid hole.
732 */
733 if ((left >= 12) && (rec_len == EXT2_DIR_ENTRY_HEADER_LEN)) {
734 memmove(cp, cp+EXT2_DIR_ENTRY_HEADER_LEN, left);
735 memset(cp + left, 0, EXT2_DIR_ENTRY_HEADER_LEN);
736 return;
737 }
738 /*
739 * If the directory entry overruns the end of the directory
740 * block, and the name is small enough to fit, then adjust the
741 * record length.
742 */
743 if ((left < 0) &&
744 ((int) rec_len + left > EXT2_DIR_ENTRY_HEADER_LEN) &&
745 ((int) name_len + EXT2_DIR_ENTRY_HEADER_LEN <= (int) rec_len + left) &&
746 dirent->inode <= fs->super->s_inodes_count &&
747 strnlen(dirent->name, name_len) == name_len) {
748 (void) ext2fs_set_rec_len(fs, (int) rec_len + left, dirent);
749 return;
750 }
751 /*
752 * If the record length of the directory entry is a multiple
753 * of four, and not too big, such that it is valid, let the
754 * previous directory entry absorb the invalid one.
755 */
756 if (prev && rec_len && (rec_len % 4) == 0 &&
757 (*offset + rec_len <= block_len)) {
758 (void) ext2fs_get_rec_len(fs, prev, &prev_rec_len);
759 prev_rec_len += rec_len;
760 (void) ext2fs_set_rec_len(fs, prev_rec_len, prev);
761 *offset += rec_len;
762 return;
763 }
764 /*
765 * Default salvage method --- kill all of the directory
766 * entries for the rest of the block. We will either try to
767 * absorb it into the previous directory entry, or create a
768 * new empty directory entry the rest of the directory block.
769 */
770 if (prev) {
771 (void) ext2fs_get_rec_len(fs, prev, &prev_rec_len);
772 prev_rec_len += block_len - *offset;
773 (void) ext2fs_set_rec_len(fs, prev_rec_len, prev);
774 *offset = fs->blocksize;
775 } else {
776 rec_len = block_len - *offset;
777 (void) ext2fs_set_rec_len(fs, rec_len, dirent);
778 ext2fs_dirent_set_name_len(dirent, 0);
779 ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN);
780 dirent->inode = 0;
781 }
782 }
783
784 #define NEXT_DIRENT(d) ((void *)((char *)(d) + (d)->rec_len))
insert_dirent_tail(ext2_filsys fs,void * dirbuf)785 static errcode_t insert_dirent_tail(ext2_filsys fs, void *dirbuf)
786 {
787 struct ext2_dir_entry *d;
788 void *top;
789 struct ext2_dir_entry_tail *t;
790
791 d = dirbuf;
792 top = EXT2_DIRENT_TAIL(dirbuf, fs->blocksize);
793
794 while (d->rec_len && !(d->rec_len & 0x3) && NEXT_DIRENT(d) <= top)
795 d = NEXT_DIRENT(d);
796
797 if (d != top) {
798 unsigned int min_size = EXT2_DIR_REC_LEN(
799 ext2fs_dirent_name_len(dirbuf));
800 if (min_size > (char *)top - (char *)d)
801 return EXT2_ET_DIR_NO_SPACE_FOR_CSUM;
802 d->rec_len = (char *)top - (char *)d;
803 }
804
805 t = (struct ext2_dir_entry_tail *)top;
806 if (t->det_reserved_zero1 ||
807 t->det_rec_len != sizeof(struct ext2_dir_entry_tail) ||
808 t->det_reserved_name_len != EXT2_DIR_NAME_LEN_CSUM)
809 ext2fs_initialize_dirent_tail(fs, t);
810
811 return 0;
812 }
813 #undef NEXT_DIRENT
814
fix_inline_dir_size(e2fsck_t ctx,ext2_ino_t ino,size_t * inline_data_size,struct problem_context * pctx,char * buf)815 static errcode_t fix_inline_dir_size(e2fsck_t ctx, ext2_ino_t ino,
816 size_t *inline_data_size,
817 struct problem_context *pctx,
818 char *buf)
819 {
820 ext2_filsys fs = ctx->fs;
821 struct ext2_inode inode;
822 size_t new_size, old_size;
823 errcode_t retval;
824
825 old_size = *inline_data_size;
826 /*
827 * If there's not enough bytes to start the "second" dir block
828 * (in the EA space) then truncate everything to the first block.
829 */
830 if (old_size > EXT4_MIN_INLINE_DATA_SIZE &&
831 old_size < EXT4_MIN_INLINE_DATA_SIZE +
832 EXT2_DIR_REC_LEN(1)) {
833 old_size = EXT4_MIN_INLINE_DATA_SIZE;
834 new_size = old_size;
835 } else
836 /* Increase to the next four-byte boundary for salvaging */
837 new_size = old_size + (4 - (old_size & 3));
838 memset(buf + old_size, 0, new_size - old_size);
839 retval = ext2fs_inline_data_set(fs, ino, 0, buf, new_size);
840 if (retval == EXT2_ET_INLINE_DATA_NO_SPACE) {
841 /* Or we can't, so truncate. */
842 new_size -= 4;
843 retval = ext2fs_inline_data_set(fs, ino, 0, buf, new_size);
844 if (retval) {
845 if (fix_problem(ctx, PR_2_FIX_INLINE_DIR_FAILED,
846 pctx)) {
847 new_size = 0;
848 goto write_inode;
849 }
850 goto err;
851 }
852 } else if (retval) {
853 if (fix_problem(ctx, PR_2_FIX_INLINE_DIR_FAILED,
854 pctx)) {
855 new_size = 0;
856 goto write_inode;
857 }
858 goto err;
859 }
860
861 write_inode:
862 retval = ext2fs_read_inode(fs, ino, &inode);
863 if (retval)
864 goto err;
865
866 retval = ext2fs_inode_size_set(fs, &inode, new_size);
867 if (retval)
868 goto err;
869 if (new_size == 0)
870 inode.i_flags &= ~EXT4_INLINE_DATA_FL;
871 retval = ext2fs_write_inode(fs, ino, &inode);
872 if (retval)
873 goto err;
874 *inline_data_size = new_size;
875
876 err:
877 return retval;
878 }
879
check_dir_block2(ext2_filsys fs,struct ext2_db_entry2 * db,void * priv_data)880 static int check_dir_block2(ext2_filsys fs,
881 struct ext2_db_entry2 *db,
882 void *priv_data)
883 {
884 int err;
885 struct check_dir_struct *cd = priv_data;
886
887 if (cd->ra_entries && cd->list_offset >= cd->next_ra_off) {
888 err = e2fsck_readahead_dblist(fs,
889 E2FSCK_RA_DBLIST_IGNORE_BLOCKCNT,
890 fs->dblist,
891 cd->list_offset + cd->ra_entries / 8,
892 cd->ra_entries);
893 if (err)
894 cd->ra_entries = 0;
895 cd->next_ra_off = cd->list_offset + (cd->ra_entries * 7 / 8);
896 }
897
898 err = check_dir_block(fs, db, priv_data);
899 cd->list_offset++;
900 return err;
901 }
902
check_dir_block(ext2_filsys fs,struct ext2_db_entry2 * db,void * priv_data)903 static int check_dir_block(ext2_filsys fs,
904 struct ext2_db_entry2 *db,
905 void *priv_data)
906 {
907 struct dx_dir_info *dx_dir;
908 struct dx_dirblock_info *dx_db = 0;
909 struct ext2_dir_entry *dirent, *prev, dot, dotdot;
910 ext2_dirhash_t hash;
911 unsigned int offset = 0;
912 int dir_modified = 0;
913 int dot_state;
914 unsigned int rec_len;
915 blk64_t block_nr = db->blk;
916 ext2_ino_t ino = db->ino;
917 ext2_ino_t subdir_parent;
918 __u16 links;
919 struct check_dir_struct *cd;
920 char *buf, *ibuf;
921 e2fsck_t ctx;
922 problem_t problem;
923 struct ext2_dx_root_info *root;
924 struct ext2_dx_countlimit *limit;
925 static dict_t de_dict;
926 struct problem_context pctx;
927 int dups_found = 0;
928 int ret;
929 int dx_csum_size = 0, de_csum_size = 0;
930 int failed_csum = 0;
931 int is_leaf = 1;
932 size_t inline_data_size = 0;
933 int filetype = 0;
934 int encrypted = 0;
935 size_t max_block_size;
936
937 cd = (struct check_dir_struct *) priv_data;
938 ibuf = buf = cd->buf;
939 ctx = cd->ctx;
940
941 if (ctx->flags & E2F_FLAG_RUN_RETURN)
942 return DIRENT_ABORT;
943
944 if (ctx->progress && (ctx->progress)(ctx, 2, cd->count++, cd->max))
945 return DIRENT_ABORT;
946
947 if (ext2fs_has_feature_metadata_csum(fs->super)) {
948 dx_csum_size = sizeof(struct ext2_dx_tail);
949 de_csum_size = sizeof(struct ext2_dir_entry_tail);
950 }
951
952 if (ext2fs_has_feature_filetype(fs->super))
953 filetype = EXT2_FT_DIR << 8;
954
955 /*
956 * Make sure the inode is still in use (could have been
957 * deleted in the duplicate/bad blocks pass.
958 */
959 if (!(ext2fs_test_inode_bitmap2(ctx->inode_used_map, ino)))
960 return 0;
961
962 cd->pctx.ino = ino;
963 cd->pctx.blk = block_nr;
964 cd->pctx.blkcount = db->blockcnt;
965 cd->pctx.ino2 = 0;
966 cd->pctx.dirent = 0;
967 cd->pctx.num = 0;
968
969 if (ext2fs_has_feature_inline_data(fs->super)) {
970 errcode_t ec;
971
972 ec = ext2fs_inline_data_size(fs, ino, &inline_data_size);
973 if (ec && ec != EXT2_ET_NO_INLINE_DATA)
974 return DIRENT_ABORT;
975 }
976
977 /* This will allow (at some point in the future) to punch out empty
978 * directory blocks and reduce the space used by a directory that grows
979 * very large and then the files are deleted. For now, all that is
980 * needed is to avoid e2fsck filling in these holes as part of
981 * feature flag. */
982 if (db->blk == 0 && ext2fs_has_feature_largedir(fs->super))
983 return 0;
984
985 if (db->blk == 0 && !inline_data_size) {
986 if (allocate_dir_block(ctx, db, buf, &cd->pctx))
987 return 0;
988 block_nr = db->blk;
989 }
990
991 if (db->blockcnt)
992 dot_state = 2;
993 else
994 dot_state = 0;
995
996 if (ctx->dirs_to_hash &&
997 ext2fs_u32_list_test(ctx->dirs_to_hash, ino))
998 dups_found++;
999
1000 #if 0
1001 printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr,
1002 db->blockcnt, ino);
1003 #endif
1004
1005 ehandler_operation(_("reading directory block"));
1006 if (inline_data_size) {
1007 memset(buf, 0, fs->blocksize - inline_data_size);
1008 cd->pctx.errcode = ext2fs_inline_data_get(fs, ino, 0, buf, 0);
1009 if (cd->pctx.errcode)
1010 goto inline_read_fail;
1011 #ifdef WORDS_BIGENDIAN
1012 if (db->blockcnt)
1013 goto skip_first_read_swab;
1014 *((__u32 *)buf) = ext2fs_le32_to_cpu(*((__u32 *)buf));
1015 cd->pctx.errcode = ext2fs_dirent_swab_in2(fs,
1016 buf + EXT4_INLINE_DATA_DOTDOT_SIZE,
1017 EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DATA_DOTDOT_SIZE,
1018 0);
1019 if (cd->pctx.errcode)
1020 goto inline_read_fail;
1021 skip_first_read_swab:
1022 if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE ||
1023 !db->blockcnt)
1024 goto inline_read_fail;
1025 cd->pctx.errcode = ext2fs_dirent_swab_in2(fs,
1026 buf + EXT4_MIN_INLINE_DATA_SIZE,
1027 inline_data_size - EXT4_MIN_INLINE_DATA_SIZE,
1028 0);
1029 #endif
1030 } else
1031 cd->pctx.errcode = ext2fs_read_dir_block4(fs, block_nr,
1032 buf, 0, ino);
1033 inline_read_fail:
1034 pctx.ino = ino;
1035 pctx.num = inline_data_size;
1036 if (((inline_data_size & 3) ||
1037 (inline_data_size > EXT4_MIN_INLINE_DATA_SIZE &&
1038 inline_data_size < EXT4_MIN_INLINE_DATA_SIZE +
1039 EXT2_DIR_REC_LEN(1))) &&
1040 fix_problem(ctx, PR_2_BAD_INLINE_DIR_SIZE, &pctx)) {
1041 errcode_t err = fix_inline_dir_size(ctx, ino,
1042 &inline_data_size, &pctx,
1043 buf);
1044 if (err)
1045 return DIRENT_ABORT;
1046
1047 }
1048 ehandler_operation(0);
1049 if (cd->pctx.errcode == EXT2_ET_DIR_CORRUPTED)
1050 cd->pctx.errcode = 0; /* We'll handle this ourselves */
1051 else if (cd->pctx.errcode == EXT2_ET_DIR_CSUM_INVALID) {
1052 cd->pctx.errcode = 0; /* We'll handle this ourselves */
1053 failed_csum = 1;
1054 }
1055 if (cd->pctx.errcode) {
1056 char *buf2;
1057 if (!fix_problem(ctx, PR_2_READ_DIRBLOCK, &cd->pctx)) {
1058 ctx->flags |= E2F_FLAG_ABORT;
1059 return DIRENT_ABORT;
1060 }
1061 ext2fs_new_dir_block(fs, db->blockcnt == 0 ? ino : 0,
1062 EXT2_ROOT_INO, &buf2);
1063 memcpy(buf, buf2, fs->blocksize);
1064 ext2fs_free_mem(&buf2);
1065 }
1066 dx_dir = e2fsck_get_dx_dir_info(ctx, ino);
1067 if (dx_dir && dx_dir->numblocks) {
1068 if (db->blockcnt >= dx_dir->numblocks) {
1069 pctx.dir = ino;
1070 if (fix_problem(ctx, PR_2_UNEXPECTED_HTREE_BLOCK,
1071 &pctx)) {
1072 clear_htree(ctx, ino);
1073 dx_dir->numblocks = 0;
1074 dx_db = 0;
1075 goto out_htree;
1076 }
1077 fatal_error(ctx, _("Can not continue."));
1078 }
1079 dx_db = &dx_dir->dx_block[db->blockcnt];
1080 dx_db->type = DX_DIRBLOCK_LEAF;
1081 dx_db->phys = block_nr;
1082 dx_db->min_hash = ~0;
1083 dx_db->max_hash = 0;
1084
1085 dirent = (struct ext2_dir_entry *) buf;
1086 (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
1087 limit = (struct ext2_dx_countlimit *) (buf+8);
1088 if (db->blockcnt == 0) {
1089 root = (struct ext2_dx_root_info *) (buf + 24);
1090 dx_db->type = DX_DIRBLOCK_ROOT;
1091 dx_db->flags |= DX_FLAG_FIRST | DX_FLAG_LAST;
1092 if ((root->reserved_zero ||
1093 root->info_length < 8 ||
1094 root->indirect_levels >=
1095 ext2_dir_htree_level(fs)) &&
1096 fix_problem(ctx, PR_2_HTREE_BAD_ROOT, &cd->pctx)) {
1097 clear_htree(ctx, ino);
1098 dx_dir->numblocks = 0;
1099 dx_db = NULL;
1100 }
1101 dx_dir->hashversion = root->hash_version;
1102 if ((dx_dir->hashversion <= EXT2_HASH_TEA) &&
1103 (fs->super->s_flags & EXT2_FLAGS_UNSIGNED_HASH))
1104 dx_dir->hashversion += 3;
1105 dx_dir->depth = root->indirect_levels + 1;
1106 } else if ((dirent->inode == 0) &&
1107 (rec_len == fs->blocksize) &&
1108 (ext2fs_dirent_name_len(dirent) == 0) &&
1109 (ext2fs_le16_to_cpu(limit->limit) ==
1110 ((fs->blocksize - (8 + dx_csum_size)) /
1111 sizeof(struct ext2_dx_entry)))) {
1112 dx_db->type = DX_DIRBLOCK_NODE;
1113 }
1114 is_leaf = dx_db ? (dx_db->type == DX_DIRBLOCK_LEAF) : 0;
1115 }
1116 out_htree:
1117
1118 /* Leaf node with no space for csum? Rebuild dirs in pass 3A. */
1119 if (is_leaf && !inline_data_size && failed_csum &&
1120 !ext2fs_dirent_has_tail(fs, (struct ext2_dir_entry *)buf)) {
1121 de_csum_size = 0;
1122 if (e2fsck_dir_will_be_rehashed(ctx, ino)) {
1123 failed_csum = 0;
1124 goto skip_checksum;
1125 }
1126 if (!fix_problem(cd->ctx, PR_2_LEAF_NODE_MISSING_CSUM,
1127 &cd->pctx))
1128 goto skip_checksum;
1129 e2fsck_rehash_dir_later(ctx, ino);
1130 failed_csum = 0;
1131 goto skip_checksum;
1132 }
1133 /* htree nodes don't use fake dirents to store checksums */
1134 if (!is_leaf)
1135 de_csum_size = 0;
1136
1137 skip_checksum:
1138 if (inline_data_size) {
1139 if (db->blockcnt) {
1140 buf += EXT4_MIN_INLINE_DATA_SIZE;
1141 max_block_size = inline_data_size - EXT4_MIN_INLINE_DATA_SIZE;
1142 /* Zero-length second block, just exit */
1143 if (max_block_size == 0)
1144 return 0;
1145 } else {
1146 max_block_size = EXT4_MIN_INLINE_DATA_SIZE;
1147 }
1148 } else
1149 max_block_size = fs->blocksize - de_csum_size;
1150
1151 if (ctx->encrypted_dirs)
1152 encrypted = ext2fs_u32_list_test(ctx->encrypted_dirs, ino);
1153
1154 dict_init(&de_dict, DICTCOUNT_T_MAX, dict_de_cmp);
1155 prev = 0;
1156 do {
1157 dgrp_t group;
1158 ext2_ino_t first_unused_inode;
1159 unsigned int name_len;
1160
1161 problem = 0;
1162 if (!inline_data_size || dot_state > 1) {
1163 dirent = (struct ext2_dir_entry *) (buf + offset);
1164 /*
1165 * If there's not even space for the entry header,
1166 * force salvaging this dir.
1167 */
1168 if (max_block_size - offset < EXT2_DIR_ENTRY_HEADER_LEN)
1169 rec_len = EXT2_DIR_REC_LEN(1);
1170 else
1171 (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
1172 cd->pctx.dirent = dirent;
1173 cd->pctx.num = offset;
1174 if ((offset + rec_len > max_block_size) ||
1175 (rec_len < 12) ||
1176 ((rec_len % 4) != 0) ||
1177 (((unsigned) ext2fs_dirent_name_len(dirent) + EXT2_DIR_ENTRY_HEADER_LEN) > rec_len)) {
1178 if (fix_problem(ctx, PR_2_DIR_CORRUPTED,
1179 &cd->pctx)) {
1180 #ifdef WORDS_BIGENDIAN
1181 /*
1182 * On big-endian systems, if the dirent
1183 * swap routine finds a rec_len that it
1184 * doesn't like, it continues
1185 * processing the block as if rec_len
1186 * == EXT2_DIR_ENTRY_HEADER_LEN. This means that the name
1187 * field gets byte swapped, which means
1188 * that salvage will not detect the
1189 * correct name length (unless the name
1190 * has a length that's an exact
1191 * multiple of four bytes), and it'll
1192 * discard the entry (unnecessarily)
1193 * and the rest of the dirent block.
1194 * Therefore, swap the rest of the
1195 * block back to disk order, run
1196 * salvage, and re-swap anything after
1197 * the salvaged dirent.
1198 */
1199 int need_reswab = 0;
1200 if (rec_len < EXT2_DIR_ENTRY_HEADER_LEN || rec_len % 4) {
1201 need_reswab = 1;
1202 ext2fs_dirent_swab_in2(fs,
1203 ((char *)dirent) + EXT2_DIR_ENTRY_HEADER_LEN,
1204 max_block_size - offset - EXT2_DIR_ENTRY_HEADER_LEN,
1205 0);
1206 }
1207 #endif
1208 salvage_directory(fs, dirent, prev,
1209 &offset,
1210 max_block_size);
1211 #ifdef WORDS_BIGENDIAN
1212 if (need_reswab) {
1213 (void) ext2fs_get_rec_len(fs,
1214 dirent, &rec_len);
1215 ext2fs_dirent_swab_in2(fs,
1216 ((char *)dirent) + offset + rec_len,
1217 max_block_size - offset - rec_len,
1218 0);
1219 }
1220 #endif
1221 dir_modified++;
1222 continue;
1223 } else
1224 goto abort_free_dict;
1225 }
1226 } else {
1227 if (dot_state == 0) {
1228 memset(&dot, 0, sizeof(dot));
1229 dirent = ˙
1230 dirent->inode = ino;
1231 dirent->rec_len = EXT2_DIR_REC_LEN(1);
1232 dirent->name_len = 1 | filetype;
1233 dirent->name[0] = '.';
1234 } else if (dot_state == 1) {
1235 memset(&dotdot, 0, sizeof(dotdot));
1236 dirent = &dotdot;
1237 dirent->inode =
1238 ((struct ext2_dir_entry *)buf)->inode;
1239 dirent->rec_len = EXT2_DIR_REC_LEN(2);
1240 dirent->name_len = 2 | filetype;
1241 dirent->name[0] = '.';
1242 dirent->name[1] = '.';
1243 } else {
1244 fatal_error(ctx, _("Can not continue."));
1245 }
1246 cd->pctx.dirent = dirent;
1247 cd->pctx.num = offset;
1248 }
1249
1250 if (dot_state == 0) {
1251 if (check_dot(ctx, dirent, ino, &cd->pctx))
1252 dir_modified++;
1253 } else if (dot_state == 1) {
1254 ret = check_dotdot(ctx, dirent, ino, &cd->pctx);
1255 if (ret < 0)
1256 goto abort_free_dict;
1257 if (ret)
1258 dir_modified++;
1259 } else if (dirent->inode == ino) {
1260 problem = PR_2_LINK_DOT;
1261 if (fix_problem(ctx, PR_2_LINK_DOT, &cd->pctx)) {
1262 dirent->inode = 0;
1263 dir_modified++;
1264 goto next;
1265 }
1266 }
1267 if (!dirent->inode)
1268 goto next;
1269
1270 /*
1271 * Make sure the inode listed is a legal one.
1272 */
1273 name_len = ext2fs_dirent_name_len(dirent);
1274 if (((dirent->inode != EXT2_ROOT_INO) &&
1275 (dirent->inode < EXT2_FIRST_INODE(fs->super))) ||
1276 (dirent->inode > fs->super->s_inodes_count)) {
1277 problem = PR_2_BAD_INO;
1278 } else if (ctx->inode_bb_map &&
1279 (ext2fs_test_inode_bitmap2(ctx->inode_bb_map,
1280 dirent->inode))) {
1281 /*
1282 * If the inode is in a bad block, offer to
1283 * clear it.
1284 */
1285 problem = PR_2_BB_INODE;
1286 } else if ((dot_state > 1) && (name_len == 1) &&
1287 (dirent->name[0] == '.')) {
1288 /*
1289 * If there's a '.' entry in anything other
1290 * than the first directory entry, it's a
1291 * duplicate entry that should be removed.
1292 */
1293 problem = PR_2_DUP_DOT;
1294 } else if ((dot_state > 1) && (name_len == 2) &&
1295 (dirent->name[0] == '.') &&
1296 (dirent->name[1] == '.')) {
1297 /*
1298 * If there's a '..' entry in anything other
1299 * than the second directory entry, it's a
1300 * duplicate entry that should be removed.
1301 */
1302 problem = PR_2_DUP_DOT_DOT;
1303 } else if ((dot_state > 1) &&
1304 (dirent->inode == EXT2_ROOT_INO)) {
1305 /*
1306 * Don't allow links to the root directory.
1307 * We check this specially to make sure we
1308 * catch this error case even if the root
1309 * directory hasn't been created yet.
1310 */
1311 problem = PR_2_LINK_ROOT;
1312 } else if ((dot_state > 1) && (name_len == 0)) {
1313 /*
1314 * Don't allow zero-length directory names.
1315 */
1316 problem = PR_2_NULL_NAME;
1317 }
1318
1319 if (problem) {
1320 if (fix_problem(ctx, problem, &cd->pctx)) {
1321 dirent->inode = 0;
1322 dir_modified++;
1323 goto next;
1324 } else {
1325 ext2fs_unmark_valid(fs);
1326 if (problem == PR_2_BAD_INO)
1327 goto next;
1328 }
1329 }
1330
1331 /*
1332 * If the inode was marked as having bad fields in
1333 * pass1, process it and offer to fix/clear it.
1334 * (We wait until now so that we can display the
1335 * pathname to the user.)
1336 */
1337 if (ctx->inode_bad_map &&
1338 ext2fs_test_inode_bitmap2(ctx->inode_bad_map,
1339 dirent->inode)) {
1340 if (e2fsck_process_bad_inode(ctx, ino,
1341 dirent->inode,
1342 buf + fs->blocksize)) {
1343 dirent->inode = 0;
1344 dir_modified++;
1345 goto next;
1346 }
1347 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1348 return DIRENT_ABORT;
1349 }
1350
1351 group = ext2fs_group_of_ino(fs, dirent->inode);
1352 first_unused_inode = group * fs->super->s_inodes_per_group +
1353 1 + fs->super->s_inodes_per_group -
1354 ext2fs_bg_itable_unused(fs, group);
1355 cd->pctx.group = group;
1356
1357 /*
1358 * Check if the inode was missed out because
1359 * _INODE_UNINIT flag was set or bg_itable_unused was
1360 * incorrect. If so, clear the _INODE_UNINIT flag and
1361 * restart e2fsck. In the future it would be nice if
1362 * we could call a function in pass1.c that checks the
1363 * newly visible inodes.
1364 */
1365 if (ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)) {
1366 pctx.num = dirent->inode;
1367 if (fix_problem(ctx, PR_2_INOREF_BG_INO_UNINIT,
1368 &cd->pctx)){
1369 ext2fs_bg_flags_clear(fs, group,
1370 EXT2_BG_INODE_UNINIT);
1371 ext2fs_mark_super_dirty(fs);
1372 ctx->flags |= E2F_FLAG_RESTART_LATER;
1373 } else {
1374 ext2fs_unmark_valid(fs);
1375 if (problem == PR_2_BAD_INO)
1376 goto next;
1377 }
1378 } else if (dirent->inode >= first_unused_inode) {
1379 pctx.num = dirent->inode;
1380 if (fix_problem(ctx, PR_2_INOREF_IN_UNUSED, &cd->pctx)){
1381 ext2fs_bg_itable_unused_set(fs, group, 0);
1382 ext2fs_mark_super_dirty(fs);
1383 ctx->flags |= E2F_FLAG_RESTART_LATER;
1384 } else {
1385 ext2fs_unmark_valid(fs);
1386 if (problem == PR_2_BAD_INO)
1387 goto next;
1388 }
1389 }
1390
1391 /*
1392 * Offer to clear unused inodes; if we are going to be
1393 * restarting the scan due to bg_itable_unused being
1394 * wrong, then don't clear any inodes to avoid zapping
1395 * inodes that were skipped during pass1 due to an
1396 * incorrect bg_itable_unused; we'll get any real
1397 * problems after we restart.
1398 */
1399 if (!(ctx->flags & E2F_FLAG_RESTART_LATER) &&
1400 !(ext2fs_test_inode_bitmap2(ctx->inode_used_map,
1401 dirent->inode)))
1402 problem = PR_2_UNUSED_INODE;
1403
1404 if (problem) {
1405 if (fix_problem(ctx, problem, &cd->pctx)) {
1406 dirent->inode = 0;
1407 dir_modified++;
1408 goto next;
1409 } else {
1410 ext2fs_unmark_valid(fs);
1411 if (problem == PR_2_BAD_INO)
1412 goto next;
1413 }
1414 }
1415
1416 if (!encrypted && check_name(ctx, dirent, &cd->pctx))
1417 dir_modified++;
1418
1419 if (encrypted && (dot_state) > 1 &&
1420 encrypted_check_name(ctx, dirent, &cd->pctx)) {
1421 dir_modified++;
1422 goto next;
1423 }
1424
1425 if (check_filetype(ctx, dirent, ino, &cd->pctx))
1426 dir_modified++;
1427
1428 if (dx_db) {
1429 ext2fs_dirhash(dx_dir->hashversion, dirent->name,
1430 ext2fs_dirent_name_len(dirent),
1431 fs->super->s_hash_seed, &hash, 0);
1432 if (hash < dx_db->min_hash)
1433 dx_db->min_hash = hash;
1434 if (hash > dx_db->max_hash)
1435 dx_db->max_hash = hash;
1436 }
1437
1438 /*
1439 * If this is a directory, then mark its parent in its
1440 * dir_info structure. If the parent field is already
1441 * filled in, then this directory has more than one
1442 * hard link. We assume the first link is correct,
1443 * and ask the user if he/she wants to clear this one.
1444 */
1445 if ((dot_state > 1) &&
1446 (ext2fs_test_inode_bitmap2(ctx->inode_dir_map,
1447 dirent->inode))) {
1448 if (e2fsck_dir_info_get_parent(ctx, dirent->inode,
1449 &subdir_parent)) {
1450 cd->pctx.ino = dirent->inode;
1451 fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
1452 goto abort_free_dict;
1453 }
1454 if (subdir_parent) {
1455 cd->pctx.ino2 = subdir_parent;
1456 if (fix_problem(ctx, PR_2_LINK_DIR,
1457 &cd->pctx)) {
1458 dirent->inode = 0;
1459 dir_modified++;
1460 goto next;
1461 }
1462 cd->pctx.ino2 = 0;
1463 } else {
1464 (void) e2fsck_dir_info_set_parent(ctx,
1465 dirent->inode, ino);
1466 }
1467 }
1468
1469 if (dups_found) {
1470 ;
1471 } else if (dict_lookup(&de_dict, dirent)) {
1472 clear_problem_context(&pctx);
1473 pctx.ino = ino;
1474 pctx.dirent = dirent;
1475 fix_problem(ctx, PR_2_REPORT_DUP_DIRENT, &pctx);
1476 e2fsck_rehash_dir_later(ctx, ino);
1477 dups_found++;
1478 } else
1479 dict_alloc_insert(&de_dict, dirent, dirent);
1480
1481 ext2fs_icount_increment(ctx->inode_count, dirent->inode,
1482 &links);
1483 if (links > 1)
1484 ctx->fs_links_count++;
1485 ctx->fs_total_count++;
1486 next:
1487 prev = dirent;
1488 if (dir_modified)
1489 (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
1490 if (!inline_data_size || dot_state > 1) {
1491 offset += rec_len;
1492 } else {
1493 if (dot_state == 1) {
1494 offset = 4;
1495 /*
1496 * If we get here, we're checking an inline
1497 * directory and we've just checked a (fake)
1498 * dotdot entry that we created on the stack.
1499 * Therefore set 'prev' to NULL so that if we
1500 * call salvage_directory on the next entry,
1501 * it won't try to absorb the next entry into
1502 * the on-stack dotdot entry.
1503 */
1504 prev = NULL;
1505 }
1506 }
1507 dot_state++;
1508 } while (offset < max_block_size);
1509 #if 0
1510 printf("\n");
1511 #endif
1512 if (dx_db) {
1513 #ifdef DX_DEBUG
1514 printf("db_block %d, type %d, min_hash 0x%0x, max_hash 0x%0x\n",
1515 db->blockcnt, dx_db->type,
1516 dx_db->min_hash, dx_db->max_hash);
1517 #endif
1518 cd->pctx.dir = cd->pctx.ino;
1519 if ((dx_db->type == DX_DIRBLOCK_ROOT) ||
1520 (dx_db->type == DX_DIRBLOCK_NODE))
1521 parse_int_node(fs, db, cd, dx_dir, buf, failed_csum);
1522 }
1523
1524 if (offset != max_block_size) {
1525 cd->pctx.num = rec_len + offset - max_block_size;
1526 if (fix_problem(ctx, PR_2_FINAL_RECLEN, &cd->pctx)) {
1527 dirent->rec_len = cd->pctx.num;
1528 dir_modified++;
1529 }
1530 }
1531 if (dir_modified) {
1532 int flags, will_rehash;
1533 /* leaf block with no tail? Rehash dirs later. */
1534 if (ext2fs_has_feature_metadata_csum(fs->super) &&
1535 is_leaf &&
1536 !inline_data_size &&
1537 !ext2fs_dirent_has_tail(fs, (struct ext2_dir_entry *)buf)) {
1538 if (insert_dirent_tail(fs, buf) == 0)
1539 goto write_and_fix;
1540 e2fsck_rehash_dir_later(ctx, ino);
1541 }
1542
1543 write_and_fix:
1544 will_rehash = e2fsck_dir_will_be_rehashed(ctx, ino);
1545 if (will_rehash) {
1546 flags = ctx->fs->flags;
1547 ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1548 }
1549 if (inline_data_size) {
1550 buf = ibuf;
1551 #ifdef WORDS_BIGENDIAN
1552 if (db->blockcnt)
1553 goto skip_first_write_swab;
1554 *((__u32 *)buf) = ext2fs_le32_to_cpu(*((__u32 *)buf));
1555 cd->pctx.errcode = ext2fs_dirent_swab_out2(fs,
1556 buf + EXT4_INLINE_DATA_DOTDOT_SIZE,
1557 EXT4_MIN_INLINE_DATA_SIZE -
1558 EXT4_INLINE_DATA_DOTDOT_SIZE,
1559 0);
1560 if (cd->pctx.errcode)
1561 goto skip_second_write_swab;
1562 skip_first_write_swab:
1563 if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE ||
1564 !db->blockcnt)
1565 goto skip_second_write_swab;
1566 cd->pctx.errcode = ext2fs_dirent_swab_out2(fs,
1567 buf + EXT4_MIN_INLINE_DATA_SIZE,
1568 inline_data_size -
1569 EXT4_MIN_INLINE_DATA_SIZE,
1570 0);
1571 skip_second_write_swab:
1572 if (cd->pctx.errcode &&
1573 !fix_problem(ctx, PR_2_WRITE_DIRBLOCK, &cd->pctx))
1574 goto abort_free_dict;
1575 #endif
1576 cd->pctx.errcode =
1577 ext2fs_inline_data_set(fs, ino, 0, buf,
1578 inline_data_size);
1579 } else
1580 cd->pctx.errcode = ext2fs_write_dir_block4(fs, block_nr,
1581 buf, 0, ino);
1582 if (will_rehash)
1583 ctx->fs->flags = (flags &
1584 EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1585 (ctx->fs->flags &
1586 ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1587 if (cd->pctx.errcode) {
1588 if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK,
1589 &cd->pctx))
1590 goto abort_free_dict;
1591 }
1592 ext2fs_mark_changed(fs);
1593 } else if (is_leaf && failed_csum && !dir_modified) {
1594 /*
1595 * If a leaf node that fails csum makes it this far without
1596 * alteration, ask the user if the checksum should be fixed.
1597 */
1598 if (fix_problem(ctx, PR_2_LEAF_NODE_ONLY_CSUM_INVALID,
1599 &cd->pctx))
1600 goto write_and_fix;
1601 }
1602 dict_free_nodes(&de_dict);
1603 return 0;
1604 abort_free_dict:
1605 ctx->flags |= E2F_FLAG_ABORT;
1606 dict_free_nodes(&de_dict);
1607 return DIRENT_ABORT;
1608 }
1609
1610 struct del_block {
1611 e2fsck_t ctx;
1612 e2_blkcnt_t num;
1613 blk64_t last_cluster;
1614 };
1615
1616 /*
1617 * This function is called to deallocate a block, and is an interator
1618 * functioned called by deallocate inode via ext2fs_iterate_block().
1619 */
deallocate_inode_block(ext2_filsys fs,blk64_t * block_nr,e2_blkcnt_t blockcnt EXT2FS_ATTR ((unused)),blk64_t ref_block EXT2FS_ATTR ((unused)),int ref_offset EXT2FS_ATTR ((unused)),void * priv_data)1620 static int deallocate_inode_block(ext2_filsys fs,
1621 blk64_t *block_nr,
1622 e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
1623 blk64_t ref_block EXT2FS_ATTR((unused)),
1624 int ref_offset EXT2FS_ATTR((unused)),
1625 void *priv_data)
1626 {
1627 struct del_block *p = priv_data;
1628 blk64_t cluster = EXT2FS_B2C(fs, *block_nr);
1629
1630 if (*block_nr == 0)
1631 return 0;
1632
1633 if (cluster == p->last_cluster)
1634 return 0;
1635
1636 p->last_cluster = cluster;
1637 if ((*block_nr < fs->super->s_first_data_block) ||
1638 (*block_nr >= ext2fs_blocks_count(fs->super)))
1639 return 0;
1640
1641 ext2fs_block_alloc_stats2(fs, *block_nr, -1);
1642 p->num++;
1643 return 0;
1644 }
1645
1646 /*
1647 * This function deallocates an inode
1648 */
deallocate_inode(e2fsck_t ctx,ext2_ino_t ino,char * block_buf)1649 static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
1650 {
1651 ext2_filsys fs = ctx->fs;
1652 struct ext2_inode inode;
1653 struct problem_context pctx;
1654 __u32 count;
1655 struct del_block del_block;
1656
1657 e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
1658 clear_problem_context(&pctx);
1659 pctx.ino = ino;
1660
1661 /*
1662 * Fix up the bitmaps...
1663 */
1664 e2fsck_read_bitmaps(ctx);
1665 ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(inode.i_mode));
1666
1667 if (ext2fs_file_acl_block(fs, &inode) &&
1668 ext2fs_has_feature_xattr(fs->super)) {
1669 pctx.errcode = ext2fs_adjust_ea_refcount3(fs,
1670 ext2fs_file_acl_block(fs, &inode),
1671 block_buf, -1, &count, ino);
1672 if (pctx.errcode == EXT2_ET_BAD_EA_BLOCK_NUM) {
1673 pctx.errcode = 0;
1674 count = 1;
1675 }
1676 if (pctx.errcode) {
1677 pctx.blk = ext2fs_file_acl_block(fs, &inode);
1678 fix_problem(ctx, PR_2_ADJ_EA_REFCOUNT, &pctx);
1679 ctx->flags |= E2F_FLAG_ABORT;
1680 return;
1681 }
1682 if (count == 0) {
1683 ext2fs_block_alloc_stats2(fs,
1684 ext2fs_file_acl_block(fs, &inode), -1);
1685 }
1686 ext2fs_file_acl_block_set(fs, &inode, 0);
1687 }
1688
1689 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
1690 goto clear_inode;
1691
1692 /* Inline data inodes don't have blocks to iterate */
1693 if (inode.i_flags & EXT4_INLINE_DATA_FL)
1694 goto clear_inode;
1695
1696 if (LINUX_S_ISREG(inode.i_mode) &&
1697 ext2fs_needs_large_file_feature(EXT2_I_SIZE(&inode)))
1698 ctx->large_files--;
1699
1700 del_block.ctx = ctx;
1701 del_block.num = 0;
1702 del_block.last_cluster = 0;
1703 pctx.errcode = ext2fs_block_iterate3(fs, ino, 0, block_buf,
1704 deallocate_inode_block,
1705 &del_block);
1706 if (pctx.errcode) {
1707 fix_problem(ctx, PR_2_DEALLOC_INODE, &pctx);
1708 ctx->flags |= E2F_FLAG_ABORT;
1709 return;
1710 }
1711 clear_inode:
1712 /* Inode may have changed by block_iterate, so reread it */
1713 e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
1714 e2fsck_clear_inode(ctx, ino, &inode, 0, "deallocate_inode");
1715 }
1716
1717 /*
1718 * This function clears the htree flag on an inode
1719 */
clear_htree(e2fsck_t ctx,ext2_ino_t ino)1720 static void clear_htree(e2fsck_t ctx, ext2_ino_t ino)
1721 {
1722 struct ext2_inode inode;
1723
1724 e2fsck_read_inode(ctx, ino, &inode, "clear_htree");
1725 inode.i_flags = inode.i_flags & ~EXT2_INDEX_FL;
1726 e2fsck_write_inode(ctx, ino, &inode, "clear_htree");
1727 if (ctx->dirs_to_hash)
1728 ext2fs_u32_list_add(ctx->dirs_to_hash, ino);
1729 }
1730
1731
e2fsck_process_bad_inode(e2fsck_t ctx,ext2_ino_t dir,ext2_ino_t ino,char * buf)1732 int e2fsck_process_bad_inode(e2fsck_t ctx, ext2_ino_t dir,
1733 ext2_ino_t ino, char *buf)
1734 {
1735 ext2_filsys fs = ctx->fs;
1736 struct ext2_inode inode;
1737 int inode_modified = 0;
1738 int not_fixed = 0;
1739 unsigned char *frag, *fsize;
1740 struct problem_context pctx;
1741 problem_t problem = 0;
1742
1743 e2fsck_read_inode(ctx, ino, &inode, "process_bad_inode");
1744
1745 clear_problem_context(&pctx);
1746 pctx.ino = ino;
1747 pctx.dir = dir;
1748 pctx.inode = &inode;
1749
1750 if (ext2fs_file_acl_block(fs, &inode) &&
1751 !ext2fs_has_feature_xattr(fs->super)) {
1752 if (fix_problem(ctx, PR_2_FILE_ACL_ZERO, &pctx)) {
1753 ext2fs_file_acl_block_set(fs, &inode, 0);
1754 inode_modified++;
1755 } else
1756 not_fixed++;
1757 }
1758
1759 if (!LINUX_S_ISDIR(inode.i_mode) && !LINUX_S_ISREG(inode.i_mode) &&
1760 !LINUX_S_ISCHR(inode.i_mode) && !LINUX_S_ISBLK(inode.i_mode) &&
1761 !LINUX_S_ISLNK(inode.i_mode) && !LINUX_S_ISFIFO(inode.i_mode) &&
1762 !(LINUX_S_ISSOCK(inode.i_mode)))
1763 problem = PR_2_BAD_MODE;
1764 else if (LINUX_S_ISCHR(inode.i_mode)
1765 && !e2fsck_pass1_check_device_inode(fs, &inode))
1766 problem = PR_2_BAD_CHAR_DEV;
1767 else if (LINUX_S_ISBLK(inode.i_mode)
1768 && !e2fsck_pass1_check_device_inode(fs, &inode))
1769 problem = PR_2_BAD_BLOCK_DEV;
1770 else if (LINUX_S_ISFIFO(inode.i_mode)
1771 && !e2fsck_pass1_check_device_inode(fs, &inode))
1772 problem = PR_2_BAD_FIFO;
1773 else if (LINUX_S_ISSOCK(inode.i_mode)
1774 && !e2fsck_pass1_check_device_inode(fs, &inode))
1775 problem = PR_2_BAD_SOCKET;
1776 else if (LINUX_S_ISLNK(inode.i_mode)
1777 && !e2fsck_pass1_check_symlink(fs, ino, &inode, buf)) {
1778 problem = PR_2_INVALID_SYMLINK;
1779 }
1780
1781 if (problem) {
1782 if (fix_problem(ctx, problem, &pctx)) {
1783 deallocate_inode(ctx, ino, 0);
1784 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1785 return 0;
1786 return 1;
1787 } else
1788 not_fixed++;
1789 problem = 0;
1790 }
1791
1792 if (inode.i_faddr) {
1793 if (fix_problem(ctx, PR_2_FADDR_ZERO, &pctx)) {
1794 inode.i_faddr = 0;
1795 inode_modified++;
1796 } else
1797 not_fixed++;
1798 }
1799
1800 switch (fs->super->s_creator_os) {
1801 case EXT2_OS_HURD:
1802 frag = &inode.osd2.hurd2.h_i_frag;
1803 fsize = &inode.osd2.hurd2.h_i_fsize;
1804 break;
1805 default:
1806 frag = fsize = 0;
1807 }
1808 if (frag && *frag) {
1809 pctx.num = *frag;
1810 if (fix_problem(ctx, PR_2_FRAG_ZERO, &pctx)) {
1811 *frag = 0;
1812 inode_modified++;
1813 } else
1814 not_fixed++;
1815 pctx.num = 0;
1816 }
1817 if (fsize && *fsize) {
1818 pctx.num = *fsize;
1819 if (fix_problem(ctx, PR_2_FSIZE_ZERO, &pctx)) {
1820 *fsize = 0;
1821 inode_modified++;
1822 } else
1823 not_fixed++;
1824 pctx.num = 0;
1825 }
1826
1827 if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
1828 !ext2fs_has_feature_huge_file(fs->super) &&
1829 (inode.osd2.linux2.l_i_blocks_hi != 0)) {
1830 pctx.num = inode.osd2.linux2.l_i_blocks_hi;
1831 if (fix_problem(ctx, PR_2_BLOCKS_HI_ZERO, &pctx)) {
1832 inode.osd2.linux2.l_i_blocks_hi = 0;
1833 inode_modified++;
1834 }
1835 }
1836
1837 if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
1838 !ext2fs_has_feature_64bit(fs->super) &&
1839 inode.osd2.linux2.l_i_file_acl_high != 0) {
1840 pctx.num = inode.osd2.linux2.l_i_file_acl_high;
1841 if (fix_problem(ctx, PR_2_I_FILE_ACL_HI_ZERO, &pctx)) {
1842 inode.osd2.linux2.l_i_file_acl_high = 0;
1843 inode_modified++;
1844 } else
1845 not_fixed++;
1846 }
1847
1848 if (ext2fs_file_acl_block(fs, &inode) &&
1849 ((ext2fs_file_acl_block(fs, &inode) < fs->super->s_first_data_block) ||
1850 (ext2fs_file_acl_block(fs, &inode) >= ext2fs_blocks_count(fs->super)))) {
1851 if (fix_problem(ctx, PR_2_FILE_ACL_BAD, &pctx)) {
1852 ext2fs_file_acl_block_set(fs, &inode, 0);
1853 inode_modified++;
1854 } else
1855 not_fixed++;
1856 }
1857 if (inode.i_size_high && !ext2fs_has_feature_largedir(fs->super) &&
1858 LINUX_S_ISDIR(inode.i_mode)) {
1859 if (fix_problem(ctx, PR_2_DIR_SIZE_HIGH_ZERO, &pctx)) {
1860 inode.i_size_high = 0;
1861 inode_modified++;
1862 } else
1863 not_fixed++;
1864 }
1865
1866 if (inode_modified)
1867 e2fsck_write_inode(ctx, ino, &inode, "process_bad_inode");
1868 if (!not_fixed && ctx->inode_bad_map)
1869 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
1870 return 0;
1871 }
1872
1873 /*
1874 * allocate_dir_block --- this function allocates a new directory
1875 * block for a particular inode; this is done if a directory has
1876 * a "hole" in it, or if a directory has a illegal block number
1877 * that was zeroed out and now needs to be replaced.
1878 */
allocate_dir_block(e2fsck_t ctx,struct ext2_db_entry2 * db,char * buf EXT2FS_ATTR ((unused)),struct problem_context * pctx)1879 static int allocate_dir_block(e2fsck_t ctx,
1880 struct ext2_db_entry2 *db,
1881 char *buf EXT2FS_ATTR((unused)),
1882 struct problem_context *pctx)
1883 {
1884 ext2_filsys fs = ctx->fs;
1885 blk64_t blk = 0;
1886 char *block;
1887 struct ext2_inode inode;
1888
1889 if (fix_problem(ctx, PR_2_DIRECTORY_HOLE, pctx) == 0)
1890 return 1;
1891
1892 /*
1893 * Read the inode and block bitmaps in; we'll be messing with
1894 * them.
1895 */
1896 e2fsck_read_bitmaps(ctx);
1897
1898 /*
1899 * First, find a free block
1900 */
1901 e2fsck_read_inode(ctx, db->ino, &inode, "allocate_dir_block");
1902 pctx->errcode = ext2fs_map_cluster_block(fs, db->ino, &inode,
1903 db->blockcnt, &blk);
1904 if (pctx->errcode || blk == 0) {
1905 blk = ext2fs_find_inode_goal(fs, db->ino, &inode, db->blockcnt);
1906 pctx->errcode = ext2fs_new_block2(fs, blk,
1907 ctx->block_found_map, &blk);
1908 if (pctx->errcode) {
1909 pctx->str = "ext2fs_new_block";
1910 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
1911 return 1;
1912 }
1913 }
1914 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
1915 ext2fs_mark_block_bitmap2(fs->block_map, blk);
1916 ext2fs_mark_bb_dirty(fs);
1917
1918 /*
1919 * Now let's create the actual data block for the inode
1920 */
1921 if (db->blockcnt)
1922 pctx->errcode = ext2fs_new_dir_block(fs, 0, 0, &block);
1923 else
1924 pctx->errcode = ext2fs_new_dir_block(fs, db->ino,
1925 EXT2_ROOT_INO, &block);
1926
1927 if (pctx->errcode) {
1928 pctx->str = "ext2fs_new_dir_block";
1929 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
1930 return 1;
1931 }
1932
1933 pctx->errcode = ext2fs_write_dir_block4(fs, blk, block, 0, db->ino);
1934 ext2fs_free_mem(&block);
1935 if (pctx->errcode) {
1936 pctx->str = "ext2fs_write_dir_block";
1937 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
1938 return 1;
1939 }
1940
1941 /*
1942 * Update the inode block count
1943 */
1944 ext2fs_iblk_add_blocks(fs, &inode, 1);
1945 if (EXT2_I_SIZE(&inode) < ((__u64) db->blockcnt+1) * fs->blocksize) {
1946 pctx->errcode = ext2fs_inode_size_set(fs, &inode,
1947 (db->blockcnt+1) * fs->blocksize);
1948 if (pctx->errcode) {
1949 pctx->str = "ext2fs_inode_size_set";
1950 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
1951 return 1;
1952 }
1953 }
1954 e2fsck_write_inode(ctx, db->ino, &inode, "allocate_dir_block");
1955
1956 /*
1957 * Finally, update the block pointers for the inode
1958 */
1959 db->blk = blk;
1960 pctx->errcode = ext2fs_bmap2(fs, db->ino, &inode, 0, BMAP_SET,
1961 db->blockcnt, 0, &blk);
1962 if (pctx->errcode) {
1963 pctx->str = "ext2fs_block_iterate";
1964 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
1965 return 1;
1966 }
1967
1968 return 0;
1969 }
1970