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e2fsck: Suppress "orphan file is clean" message in preen mode
[thirdparty/e2fsprogs.git] / e2fsck / super.c
1 /*
2 * e2fsck.c - superblock checks
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
12 #include "config.h"
13 #ifdef HAVE_ERRNO_H
14 #include <errno.h>
15 #endif
16
17 #ifndef EXT2_SKIP_UUID
18 #include "uuid/uuid.h"
19 #endif
20 #include "e2fsck.h"
21 #include "problem.h"
22
23 #define MIN_CHECK 1
24 #define MAX_CHECK 2
25 #define LOG2_CHECK 4
26
27 static int check_super_value(e2fsck_t ctx, const char *descr,
28 unsigned long value, int flags,
29 unsigned long min_val, unsigned long max_val)
30 {
31 struct problem_context pctx;
32
33 if ((flags & MIN_CHECK && value < min_val) ||
34 (flags & MAX_CHECK && value > max_val) ||
35 (flags & LOG2_CHECK && (value & (value - 1)) != 0)) {
36 clear_problem_context(&pctx);
37 pctx.num = value;
38 pctx.str = descr;
39 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
40 ctx->flags |= E2F_FLAG_ABORT;
41 return 0;
42 }
43 return 1;
44 }
45
46 static int check_super_value64(e2fsck_t ctx, const char *descr,
47 __u64 value, int flags,
48 __u64 min_val, __u64 max_val)
49 {
50 struct problem_context pctx;
51
52 if ((flags & MIN_CHECK && value < min_val) ||
53 (flags & MAX_CHECK && value > max_val) ||
54 (flags & LOG2_CHECK && (value & (value - 1)) != 0)) {
55 clear_problem_context(&pctx);
56 pctx.num = value;
57 pctx.str = descr;
58 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
59 ctx->flags |= E2F_FLAG_ABORT;
60 return 0;
61 }
62 return 1;
63 }
64
65 /*
66 * helper function to release an inode
67 */
68 struct process_block_struct {
69 e2fsck_t ctx;
70 char *buf;
71 struct problem_context *pctx;
72 int truncating;
73 int truncate_offset;
74 e2_blkcnt_t truncate_block;
75 int truncated_blocks;
76 int abort;
77 errcode_t errcode;
78 blk64_t last_cluster;
79 struct ext2_inode_large *inode;
80 };
81
82 static int release_inode_block(ext2_filsys fs,
83 blk64_t *block_nr,
84 e2_blkcnt_t blockcnt,
85 blk64_t ref_blk EXT2FS_ATTR((unused)),
86 int ref_offset EXT2FS_ATTR((unused)),
87 void *priv_data)
88 {
89 struct process_block_struct *pb;
90 e2fsck_t ctx;
91 struct problem_context *pctx;
92 blk64_t blk = *block_nr;
93 blk64_t cluster = EXT2FS_B2C(fs, *block_nr);
94 int retval = 0;
95
96 pb = (struct process_block_struct *) priv_data;
97 ctx = pb->ctx;
98 pctx = pb->pctx;
99
100 pctx->blk = blk;
101 pctx->blkcount = blockcnt;
102
103 if (blk == 0)
104 return 0;
105
106 if (pb->last_cluster == cluster)
107 return 0;
108
109 pb->last_cluster = cluster;
110
111 if ((blk < fs->super->s_first_data_block) ||
112 (blk >= ext2fs_blocks_count(fs->super))) {
113 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM, pctx);
114 return_abort:
115 pb->abort = 1;
116 return BLOCK_ABORT;
117 }
118
119 if (!ext2fs_test_block_bitmap2(fs->block_map, blk)) {
120 fix_problem(ctx, PR_0_ORPHAN_ALREADY_CLEARED_BLOCK, pctx);
121 goto return_abort;
122 }
123
124 /*
125 * If we are deleting an orphan, then we leave the fields alone.
126 * If we are truncating an orphan, then update the inode fields
127 * and clean up any partial block data.
128 */
129 if (pb->truncating) {
130 /*
131 * We only remove indirect blocks if they are
132 * completely empty.
133 */
134 if (blockcnt < 0) {
135 int i, limit;
136 blk_t *bp;
137
138 pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
139 pb->buf);
140 if (pb->errcode)
141 goto return_abort;
142
143 limit = fs->blocksize >> 2;
144 for (i = 0, bp = (blk_t *) pb->buf;
145 i < limit; i++, bp++)
146 if (*bp)
147 return 0;
148 }
149 /*
150 * We don't remove direct blocks until we've reached
151 * the truncation block.
152 */
153 if (blockcnt >= 0 && blockcnt < pb->truncate_block)
154 return 0;
155 /*
156 * If part of the last block needs truncating, we do
157 * it here.
158 */
159 if ((blockcnt == pb->truncate_block) && pb->truncate_offset) {
160 pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
161 pb->buf);
162 if (pb->errcode)
163 goto return_abort;
164 memset(pb->buf + pb->truncate_offset, 0,
165 fs->blocksize - pb->truncate_offset);
166 pb->errcode = io_channel_write_blk64(fs->io, blk, 1,
167 pb->buf);
168 if (pb->errcode)
169 goto return_abort;
170 }
171 pb->truncated_blocks++;
172 *block_nr = 0;
173 retval |= BLOCK_CHANGED;
174 }
175
176 if (ctx->qctx)
177 quota_data_sub(ctx->qctx, pb->inode, 0, ctx->fs->blocksize);
178 ext2fs_block_alloc_stats2(fs, blk, -1);
179 ctx->free_blocks++;
180 return retval;
181 }
182
183 /*
184 * This function releases an inode. Returns 1 if an inconsistency was
185 * found. If the inode has a link count, then it is being truncated and
186 * not deleted.
187 */
188 static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
189 struct ext2_inode_large *inode, char *block_buf,
190 struct problem_context *pctx)
191 {
192 struct process_block_struct pb;
193 ext2_filsys fs = ctx->fs;
194 blk64_t blk;
195 errcode_t retval;
196 __u32 count;
197
198 if (!ext2fs_inode_has_valid_blocks2(fs, EXT2_INODE(inode)))
199 return 0;
200
201 pb.buf = block_buf + 3 * ctx->fs->blocksize;
202 pb.ctx = ctx;
203 pb.abort = 0;
204 pb.errcode = 0;
205 pb.pctx = pctx;
206 pb.last_cluster = 0;
207 pb.inode = inode;
208 if (inode->i_links_count) {
209 pb.truncating = 1;
210 pb.truncate_block = (e2_blkcnt_t)
211 ((EXT2_I_SIZE(inode) + fs->blocksize - 1) /
212 fs->blocksize);
213 pb.truncate_offset = inode->i_size % fs->blocksize;
214 } else {
215 pb.truncating = 0;
216 pb.truncate_block = 0;
217 pb.truncate_offset = 0;
218 }
219 pb.truncated_blocks = 0;
220 retval = ext2fs_block_iterate3(fs, ino, BLOCK_FLAG_DEPTH_TRAVERSE,
221 block_buf, release_inode_block, &pb);
222 if (retval) {
223 com_err("release_inode_blocks", retval,
224 _("while calling ext2fs_block_iterate for inode %u"),
225 ino);
226 return 1;
227 }
228 if (pb.abort)
229 return 1;
230
231 /* Refresh the inode since ext2fs_block_iterate may have changed it */
232 e2fsck_read_inode_full(ctx, ino, EXT2_INODE(inode), sizeof(*inode),
233 "release_inode_blocks");
234
235 if (pb.truncated_blocks)
236 ext2fs_iblk_sub_blocks(fs, EXT2_INODE(inode),
237 pb.truncated_blocks);
238
239 blk = ext2fs_file_acl_block(fs, EXT2_INODE(inode));
240 if (blk) {
241 retval = ext2fs_adjust_ea_refcount3(fs, blk, block_buf, -1,
242 &count, ino);
243 if (retval == EXT2_ET_BAD_EA_BLOCK_NUM) {
244 retval = 0;
245 count = 1;
246 }
247 if (retval) {
248 com_err("release_inode_blocks", retval,
249 _("while calling ext2fs_adjust_ea_refcount2 for inode %u"),
250 ino);
251 return 1;
252 }
253 if (count == 0) {
254 if (ctx->qctx)
255 quota_data_sub(ctx->qctx, inode, 0,
256 ctx->fs->blocksize);
257 ext2fs_block_alloc_stats2(fs, blk, -1);
258 ctx->free_blocks++;
259 }
260 ext2fs_file_acl_block_set(fs, EXT2_INODE(inode), 0);
261 }
262 return 0;
263 }
264
265 /* Load all quota data in preparation for orphan clearing. */
266 static errcode_t e2fsck_read_all_quotas(e2fsck_t ctx)
267 {
268 ext2_ino_t qf_ino;
269 enum quota_type qtype;
270 errcode_t retval = 0;
271
272 if (!ext2fs_has_feature_quota(ctx->fs->super))
273 return retval;
274
275 retval = quota_init_context(&ctx->qctx, ctx->fs, 0);
276 if (retval)
277 return retval;
278
279 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
280 qf_ino = *quota_sb_inump(ctx->fs->super, qtype);
281 if (qf_ino == 0)
282 continue;
283
284 retval = quota_read_all_dquots(ctx->qctx, qf_ino, qtype,
285 QREAD_USAGE | QREAD_LIMITS);
286 if (retval)
287 break;
288 }
289 if (retval)
290 quota_release_context(&ctx->qctx);
291 return retval;
292 }
293
294 /* Write all the quota info to disk. */
295 static errcode_t e2fsck_write_all_quotas(e2fsck_t ctx)
296 {
297 struct problem_context pctx;
298 enum quota_type qtype;
299
300 if (!ext2fs_has_feature_quota(ctx->fs->super))
301 return 0;
302
303 clear_problem_context(&pctx);
304 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
305 pctx.num = qtype;
306 pctx.errcode = quota_write_inode(ctx->qctx, 1 << qtype);
307 if (pctx.errcode) {
308 fix_problem(ctx, PR_6_WRITE_QUOTAS, &pctx);
309 break;
310 }
311 }
312
313 quota_release_context(&ctx->qctx);
314 return pctx.errcode;
315 }
316
317 static int release_orphan_inode(e2fsck_t ctx, ext2_ino_t *ino, char *block_buf)
318 {
319 ext2_filsys fs = ctx->fs;
320 struct problem_context pctx;
321 struct ext2_inode_large inode;
322 ext2_ino_t next_ino;
323
324 e2fsck_read_inode_full(ctx, *ino, EXT2_INODE(&inode),
325 sizeof(inode), "release_orphan_inode");
326 clear_problem_context(&pctx);
327 pctx.ino = *ino;
328 pctx.inode = EXT2_INODE(&inode);
329 pctx.str = inode.i_links_count ? _("Truncating") : _("Clearing");
330
331 fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx);
332
333 next_ino = inode.i_dtime;
334 if (next_ino &&
335 ((next_ino < EXT2_FIRST_INODE(fs->super)) ||
336 (next_ino > fs->super->s_inodes_count))) {
337 pctx.ino = next_ino;
338 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
339 return 1;
340 }
341
342 if (release_inode_blocks(ctx, *ino, &inode, block_buf, &pctx))
343 return 1;
344
345 if (!inode.i_links_count) {
346 if (ctx->qctx)
347 quota_data_inodes(ctx->qctx, &inode, *ino, -1);
348 ext2fs_inode_alloc_stats2(fs, *ino, -1,
349 LINUX_S_ISDIR(inode.i_mode));
350 ctx->free_inodes++;
351 inode.i_dtime = ctx->now;
352 } else {
353 inode.i_dtime = 0;
354 }
355 e2fsck_write_inode_full(ctx, *ino, EXT2_INODE(&inode),
356 sizeof(inode), "delete_file");
357 *ino = next_ino;
358 return 0;
359 }
360
361 struct process_orphan_block_data {
362 e2fsck_t ctx;
363 char *buf;
364 char *block_buf;
365 e2_blkcnt_t blocks;
366 int abort;
367 int clear;
368 errcode_t errcode;
369 ext2_ino_t ino;
370 __u32 generation;
371 };
372
373 static int process_orphan_block(ext2_filsys fs,
374 blk64_t *block_nr,
375 e2_blkcnt_t blockcnt,
376 blk64_t ref_blk EXT2FS_ATTR((unused)),
377 int ref_offset EXT2FS_ATTR((unused)),
378 void *priv_data)
379 {
380 struct process_orphan_block_data *pd;
381 e2fsck_t ctx;
382 struct problem_context pctx;
383 blk64_t blk = *block_nr;
384 struct ext4_orphan_block_tail *tail;
385 int j;
386 int inodes_per_ob;
387 __u32 *bdata;
388 ext2_ino_t ino;
389
390 pd = priv_data;
391 ctx = pd->ctx;
392 clear_problem_context(&pctx);
393 pctx.ino = fs->super->s_orphan_file_inum;
394 pctx.blk = blockcnt;
395
396 /* Orphan file must not have holes */
397 if (!blk) {
398 if (blockcnt == pd->blocks)
399 return BLOCK_ABORT;
400 fix_problem(ctx, PR_0_ORPHAN_FILE_HOLE, &pctx);
401 return_abort:
402 pd->abort = 1;
403 return BLOCK_ABORT;
404 }
405 inodes_per_ob = ext2fs_inodes_per_orphan_block(fs);
406 pd->errcode = io_channel_read_blk64(fs->io, blk, 1, pd->buf);
407 if (pd->errcode)
408 goto return_abort;
409 tail = ext2fs_orphan_block_tail(fs, pd->buf);
410 if (ext2fs_le32_to_cpu(tail->ob_magic) !=
411 EXT4_ORPHAN_BLOCK_MAGIC) {
412 fix_problem(ctx, PR_0_ORPHAN_FILE_BAD_MAGIC, &pctx);
413 goto return_abort;
414 }
415 if (!ext2fs_orphan_file_block_csum_verify(fs,
416 fs->super->s_orphan_file_inum, blk, pd->buf)) {
417 fix_problem(ctx, PR_0_ORPHAN_FILE_BAD_CHECKSUM, &pctx);
418 goto return_abort;
419 }
420 bdata = (__u32 *)pd->buf;
421 for (j = 0; j < inodes_per_ob; j++) {
422 if (!bdata[j])
423 continue;
424 ino = ext2fs_le32_to_cpu(bdata[j]);
425 if (release_orphan_inode(ctx, &ino, pd->block_buf))
426 goto return_abort;
427 }
428 return 0;
429 }
430
431 static int process_orphan_file(e2fsck_t ctx, char *block_buf)
432 {
433 ext2_filsys fs = ctx->fs;
434 char *orphan_buf;
435 struct process_orphan_block_data pd;
436 int ret = 0;
437 ext2_ino_t orphan_inum = fs->super->s_orphan_file_inum;
438 struct ext2_inode orphan_inode;
439 struct problem_context pctx;
440 errcode_t retval;
441
442 if (!ext2fs_has_feature_orphan_file(fs->super))
443 return 0;
444
445 clear_problem_context(&pctx);
446 pctx.ino = orphan_inum;
447
448 orphan_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
449 "orphan block buffer");
450 retval = ext2fs_read_inode(fs, orphan_inum, &orphan_inode);
451 if (retval < 0) {
452 com_err("process_orphan_file", retval,
453 _("while reading inode %d"), orphan_inum);
454 ret = 1;
455 goto out;
456 }
457 if (EXT2_I_SIZE(&orphan_inode) & (fs->blocksize - 1)) {
458 fix_problem(ctx, PR_0_ORPHAN_FILE_WRONG_SIZE, &pctx);
459 ret = 1;
460 goto out;
461 }
462 pd.buf = orphan_buf + 3 * fs->blocksize;
463 pd.block_buf = block_buf;
464 pd.blocks = EXT2_I_SIZE(&orphan_inode) / fs->blocksize;
465 pd.ctx = ctx;
466 pd.abort = 0;
467 pd.errcode = 0;
468 retval = ext2fs_block_iterate3(fs, orphan_inum,
469 BLOCK_FLAG_DATA_ONLY | BLOCK_FLAG_HOLE,
470 orphan_buf, process_orphan_block, &pd);
471 if (retval) {
472 com_err("process_orphan_block", retval,
473 _("while calling ext2fs_block_iterate for inode %d"),
474 orphan_inum);
475 ret = 1;
476 goto out;
477 }
478 if (pd.abort) {
479 if (pd.errcode) {
480 com_err("process_orphan_block", pd.errcode,
481 _("while reading blocks of inode %d"),
482 orphan_inum);
483 }
484 ret = 1;
485 }
486 out:
487 ext2fs_free_mem(&orphan_buf);
488 return ret;
489 }
490
491 /*
492 * This function releases all of the orphan inodes. It returns 1 if
493 * it hit some error, and 0 on success.
494 */
495 static int release_orphan_inodes(e2fsck_t ctx)
496 {
497 ext2_filsys fs = ctx->fs;
498 ext2_ino_t ino;
499 struct problem_context pctx;
500 char *block_buf;
501
502 if (fs->super->s_last_orphan == 0 &&
503 !ext2fs_has_feature_orphan_present(fs->super))
504 return 0;
505
506 clear_problem_context(&pctx);
507 ino = fs->super->s_last_orphan;
508 pctx.ino = ino;
509 pctx.errcode = e2fsck_read_all_quotas(ctx);
510 if (pctx.errcode) {
511 fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
512 return 1;
513 }
514
515 /*
516 * Win or lose, we won't be using the head of the orphan inode
517 * list again.
518 */
519 fs->super->s_last_orphan = 0;
520 ext2fs_mark_super_dirty(fs);
521
522 /*
523 * If the filesystem contains errors, don't process the orphan list
524 * or orphan file, since neither can be trusted; and we're going to
525 * be running a full e2fsck run anyway... We clear orphan file contents
526 * after filesystem is checked to avoid clearing someone else's data.
527 */
528 if (fs->super->s_state & EXT2_ERROR_FS) {
529 if (ctx->qctx)
530 quota_release_context(&ctx->qctx);
531 return 0;
532 }
533
534 if (ino && ((ino < EXT2_FIRST_INODE(fs->super)) ||
535 (ino > fs->super->s_inodes_count))) {
536 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
537 goto err_qctx;
538 }
539
540 block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
541 "block iterate buffer");
542 e2fsck_read_bitmaps(ctx);
543
544 /* First process orphan list */
545 while (ino) {
546 if (release_orphan_inode(ctx, &ino, block_buf))
547 goto err_buf;
548 }
549
550 /* Next process orphan file */
551 if (ext2fs_has_feature_orphan_present(fs->super) &&
552 !ext2fs_has_feature_orphan_file(fs->super))
553 goto err_buf;
554 if (process_orphan_file(ctx, block_buf))
555 goto err_buf;
556
557 ext2fs_free_mem(&block_buf);
558 pctx.errcode = e2fsck_write_all_quotas(ctx);
559 if (pctx.errcode)
560 goto err;
561 return 0;
562 err_buf:
563 ext2fs_free_mem(&block_buf);
564 err_qctx:
565 if (ctx->qctx)
566 quota_release_context(&ctx->qctx);
567 err:
568 return 1;
569 }
570
571 static int reinit_orphan_block(ext2_filsys fs,
572 blk64_t *block_nr,
573 e2_blkcnt_t blockcnt,
574 blk64_t ref_blk EXT2FS_ATTR((unused)),
575 int ref_offset EXT2FS_ATTR((unused)),
576 void *priv_data)
577 {
578 struct process_orphan_block_data *pd;
579 e2fsck_t ctx;
580 blk64_t blk = *block_nr;
581 struct problem_context pctx;
582
583 pd = priv_data;
584 ctx = pd->ctx;
585
586 /* Orphan file must not have holes */
587 if (!blk) {
588 if (blockcnt == pd->blocks)
589 return BLOCK_ABORT;
590
591 clear_problem_context(&pctx);
592 pctx.ino = fs->super->s_orphan_file_inum;
593 pctx.blk = blockcnt;
594 fix_problem(ctx, PR_6_ORPHAN_FILE_HOLE, &pctx);
595 return_abort:
596 pd->abort = 1;
597 return BLOCK_ABORT;
598 }
599
600 if (ext2fs_has_feature_metadata_csum(fs->super)) {
601 struct ext4_orphan_block_tail *tail;
602
603 tail = ext2fs_orphan_block_tail(fs, pd->buf);
604 /*
605 * Update checksum to match expected buffer contents with
606 * appropriate block number.
607 */
608 tail->ob_checksum = ext2fs_do_orphan_file_block_csum(fs,
609 pd->ino, pd->generation, blk, pd->buf);
610 }
611 if (!pd->clear) {
612 pd->errcode = io_channel_read_blk64(fs->io, blk, 1,
613 pd->block_buf);
614 /* Block is already cleanly initialized? */
615 if (!memcmp(pd->block_buf, pd->buf, fs->blocksize))
616 return 0;
617
618 clear_problem_context(&pctx);
619 pctx.ino = fs->super->s_orphan_file_inum;
620 pctx.blk = blockcnt;
621 if (!fix_problem(ctx, PR_6_ORPHAN_BLOCK_DIRTY, &pctx))
622 goto return_abort;
623 pd->clear = 1;
624 }
625 pd->errcode = io_channel_write_blk64(fs->io, blk, 1, pd->buf);
626 if (pd->errcode)
627 goto return_abort;
628 return 0;
629 }
630
631 /*
632 * Check and clear orphan file. We just return non-zero if we hit some
633 * inconsistency. Caller will truncate & recreate new orphan file.
634 */
635 int check_init_orphan_file(e2fsck_t ctx)
636 {
637 ext2_filsys fs = ctx->fs;
638 char *orphan_buf;
639 struct process_orphan_block_data pd;
640 struct ext4_orphan_block_tail *tail;
641 ext2_ino_t orphan_inum = fs->super->s_orphan_file_inum;
642 struct ext2_inode orphan_inode;
643 int ret = 0;
644 errcode_t retval;
645
646 orphan_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 5,
647 "orphan block buffer");
648 e2fsck_read_inode(ctx, orphan_inum, &orphan_inode, "orphan inode");
649 if (EXT2_I_SIZE(&orphan_inode) & (fs->blocksize - 1)) {
650 struct problem_context pctx;
651
652 clear_problem_context(&pctx);
653 pctx.ino = orphan_inum;
654 fix_problem(ctx, PR_6_ORPHAN_FILE_WRONG_SIZE, &pctx);
655 ret = 1;
656 goto out;
657 }
658 pd.buf = orphan_buf + 3 * fs->blocksize;
659 pd.block_buf = orphan_buf + 4 * fs->blocksize;
660 pd.blocks = EXT2_I_SIZE(&orphan_inode) / fs->blocksize;
661 pd.ctx = ctx;
662 pd.abort = 0;
663 pd.clear = 0;
664 pd.errcode = 0;
665 pd.ino = orphan_inum;
666 pd.generation = orphan_inode.i_generation;
667 /* Initialize buffer to write */
668 memset(pd.buf, 0, fs->blocksize);
669 tail = ext2fs_orphan_block_tail(fs, pd.buf);
670 tail->ob_magic = ext2fs_cpu_to_le32(EXT4_ORPHAN_BLOCK_MAGIC);
671
672 retval = ext2fs_block_iterate3(fs, orphan_inum,
673 BLOCK_FLAG_DATA_ONLY | BLOCK_FLAG_HOLE,
674 orphan_buf, reinit_orphan_block, &pd);
675 if (retval) {
676 com_err("reinit_orphan_block", retval,
677 _("while calling ext2fs_block_iterate for inode %d"),
678 orphan_inum);
679 ret = 1;
680 goto out;
681 }
682 if (pd.abort) {
683 if (pd.errcode) {
684 com_err("process_orphan_block", pd.errcode,
685 _("while reading blocks of inode %d"),
686 orphan_inum);
687 }
688 ret = 1;
689 }
690
691 /* We had to clear some blocks. Report it up. */
692 if (ret == 0 && pd.clear)
693 ret = 2;
694 out:
695 ext2fs_free_mem(&orphan_buf);
696 return ret;
697 }
698
699 /*
700 * Check the resize inode to make sure it is sane. We check both for
701 * the case where on-line resizing is not enabled (in which case the
702 * resize inode should be cleared) as well as the case where on-line
703 * resizing is enabled.
704 */
705 void check_resize_inode(e2fsck_t ctx)
706 {
707 ext2_filsys fs = ctx->fs;
708 struct ext2_inode inode;
709 struct problem_context pctx;
710 int i, gdt_off, ind_off;
711 dgrp_t j;
712 blk_t blk, pblk;
713 blk_t expect; /* for resize inode, which is 32-bit only */
714 __u32 *dind_buf = 0, *ind_buf;
715 errcode_t retval;
716
717 clear_problem_context(&pctx);
718
719 if (ext2fs_has_feature_resize_inode(fs->super) &&
720 ext2fs_has_feature_meta_bg(fs->super) &&
721 fix_problem(ctx, PR_0_DISABLE_RESIZE_INODE, &pctx)) {
722 ext2fs_clear_feature_resize_inode(fs->super);
723 fs->super->s_reserved_gdt_blocks = 0;
724 ext2fs_mark_super_dirty(fs);
725 }
726
727 /*
728 * If the resize inode feature isn't set, then
729 * s_reserved_gdt_blocks must be zero.
730 */
731 if (!ext2fs_has_feature_resize_inode(fs->super)) {
732 if (fs->super->s_reserved_gdt_blocks) {
733 pctx.num = fs->super->s_reserved_gdt_blocks;
734 if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS,
735 &pctx)) {
736 fs->super->s_reserved_gdt_blocks = 0;
737 ext2fs_mark_super_dirty(fs);
738 }
739 }
740 }
741
742 /* Read the resize inode */
743 pctx.ino = EXT2_RESIZE_INO;
744 retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
745 if (retval) {
746 if (ext2fs_has_feature_resize_inode(fs->super))
747 ctx->flags |= E2F_FLAG_RESIZE_INODE;
748 return;
749 }
750
751 /*
752 * If the resize inode feature isn't set, check to make sure
753 * the resize inode is cleared; then we're done.
754 */
755 if (!ext2fs_has_feature_resize_inode(fs->super)) {
756 for (i=0; i < EXT2_N_BLOCKS; i++) {
757 if (inode.i_block[i])
758 break;
759 }
760 if ((i < EXT2_N_BLOCKS) &&
761 fix_problem(ctx, PR_0_CLEAR_RESIZE_INODE, &pctx)) {
762 memset(&inode, 0, sizeof(inode));
763 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
764 "clear_resize");
765 }
766 return;
767 }
768
769 /*
770 * The resize inode feature is enabled; check to make sure the
771 * only block in use is the double indirect block
772 */
773 blk = inode.i_block[EXT2_DIND_BLOCK];
774 for (i=0; i < EXT2_N_BLOCKS; i++) {
775 if (i != EXT2_DIND_BLOCK && inode.i_block[i])
776 break;
777 }
778 if ((i < EXT2_N_BLOCKS) || !blk || !inode.i_links_count ||
779 !(inode.i_mode & LINUX_S_IFREG) ||
780 (blk < fs->super->s_first_data_block ||
781 blk >= ext2fs_blocks_count(fs->super))) {
782 resize_inode_invalid:
783 if (fix_problem(ctx, PR_0_RESIZE_INODE_INVALID, &pctx)) {
784 memset(&inode, 0, sizeof(inode));
785 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
786 "clear_resize");
787 ctx->flags |= E2F_FLAG_RESIZE_INODE;
788 }
789 if (!(ctx->options & E2F_OPT_READONLY)) {
790 fs->super->s_state &= ~EXT2_VALID_FS;
791 ext2fs_mark_super_dirty(fs);
792 }
793 goto cleanup;
794 }
795 dind_buf = (__u32 *) e2fsck_allocate_memory(ctx, fs->blocksize * 2,
796 "resize dind buffer");
797 ind_buf = (__u32 *) ((char *) dind_buf + fs->blocksize);
798
799 retval = ext2fs_read_ind_block(fs, blk, dind_buf);
800 if (retval)
801 goto resize_inode_invalid;
802
803 gdt_off = fs->desc_blocks;
804 pblk = fs->super->s_first_data_block + 1 + fs->desc_blocks;
805 if (fs->blocksize == 1024 && fs->super->s_first_data_block == 0)
806 pblk++; /* Deal with 1024 blocksize bigalloc fs */
807 for (i = 0; i < fs->super->s_reserved_gdt_blocks / 4;
808 i++, gdt_off++, pblk++) {
809 gdt_off %= fs->blocksize/4;
810 if (dind_buf[gdt_off] != pblk)
811 goto resize_inode_invalid;
812 retval = ext2fs_read_ind_block(fs, pblk, ind_buf);
813 if (retval)
814 goto resize_inode_invalid;
815 ind_off = 0;
816 for (j = 1; j < fs->group_desc_count; j++) {
817 if (!ext2fs_bg_has_super(fs, j))
818 continue;
819 expect = pblk + EXT2_GROUPS_TO_BLOCKS(fs->super, j);
820 if (ind_buf[ind_off] != expect)
821 goto resize_inode_invalid;
822 ind_off++;
823 }
824 }
825
826 cleanup:
827 if (dind_buf)
828 ext2fs_free_mem(&dind_buf);
829
830 }
831
832 /*
833 * This function checks the dirhash signed/unsigned hint if necessary.
834 */
835 static void e2fsck_fix_dirhash_hint(e2fsck_t ctx)
836 {
837 struct ext2_super_block *sb = ctx->fs->super;
838 struct problem_context pctx;
839 char c;
840
841 if ((ctx->options & E2F_OPT_READONLY) ||
842 !ext2fs_has_feature_dir_index(sb) ||
843 (sb->s_flags & (EXT2_FLAGS_SIGNED_HASH|EXT2_FLAGS_UNSIGNED_HASH)))
844 return;
845
846 c = (char) 255;
847
848 clear_problem_context(&pctx);
849 if (fix_problem(ctx, PR_0_DIRHASH_HINT, &pctx)) {
850 if (((int) c) == -1) {
851 sb->s_flags |= EXT2_FLAGS_SIGNED_HASH;
852 } else {
853 sb->s_flags |= EXT2_FLAGS_UNSIGNED_HASH;
854 }
855 ext2fs_mark_super_dirty(ctx->fs);
856 }
857 }
858
859
860 void check_super_block(e2fsck_t ctx)
861 {
862 ext2_filsys fs = ctx->fs;
863 blk64_t first_block, last_block;
864 struct ext2_super_block *sb = fs->super;
865 unsigned int ipg_max;
866 problem_t problem;
867 blk64_t blocks_per_group = fs->super->s_blocks_per_group;
868 __u32 bpg_max, cpg_max;
869 __u64 blks_max;
870 int inodes_per_block;
871 int inode_size;
872 int accept_time_fudge;
873 int broken_system_clock;
874 dgrp_t i;
875 blk64_t should_be;
876 struct problem_context pctx;
877 blk64_t free_blocks = 0;
878 ext2_ino_t free_inodes = 0;
879 int csum_flag, clear_test_fs_flag;
880
881 inodes_per_block = EXT2_INODES_PER_BLOCK(fs->super);
882 ipg_max = inodes_per_block * (blocks_per_group - 4);
883 if (ipg_max > EXT2_MAX_INODES_PER_GROUP(sb))
884 ipg_max = EXT2_MAX_INODES_PER_GROUP(sb);
885 cpg_max = 8 * EXT2_BLOCK_SIZE(sb);
886 if (cpg_max > EXT2_MAX_CLUSTERS_PER_GROUP(sb))
887 cpg_max = EXT2_MAX_CLUSTERS_PER_GROUP(sb);
888 bpg_max = 8 * EXT2_BLOCK_SIZE(sb) * EXT2FS_CLUSTER_RATIO(fs);
889 if (bpg_max > EXT2_MAX_BLOCKS_PER_GROUP(sb))
890 bpg_max = EXT2_MAX_BLOCKS_PER_GROUP(sb);
891
892 ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
893 sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap");
894 ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
895 sizeof(int) * fs->group_desc_count, "invalid_block_bitmap");
896 ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx,
897 sizeof(int) * fs->group_desc_count, "invalid_inode_table");
898
899 blks_max = (1ULL << 32) * EXT2_MAX_BLOCKS_PER_GROUP(fs->super);
900 if (ext2fs_has_feature_64bit(fs->super)) {
901 if (blks_max > ((1ULL << 48) - 1))
902 blks_max = (1ULL << 48) - 1;
903 } else {
904 if (blks_max > ((1ULL << 32) - 1))
905 blks_max = (1ULL << 32) - 1;
906 }
907
908 clear_problem_context(&pctx);
909
910 /*
911 * Verify the super block constants...
912 */
913 if (!check_super_value(ctx, "inodes_count", sb->s_inodes_count,
914 MIN_CHECK, 1, 0))
915 return;
916 if (!check_super_value64(ctx, "blocks_count", ext2fs_blocks_count(sb),
917 MIN_CHECK | MAX_CHECK, 1, blks_max))
918 return;
919 if (!check_super_value(ctx, "first_data_block", sb->s_first_data_block,
920 MAX_CHECK, 0, ext2fs_blocks_count(sb)))
921 return;
922 if (!check_super_value(ctx, "log_block_size", sb->s_log_block_size,
923 MIN_CHECK | MAX_CHECK, 0,
924 EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE))
925 return;
926 if (!check_super_value(ctx, "log_cluster_size",
927 sb->s_log_cluster_size,
928 MIN_CHECK | MAX_CHECK, sb->s_log_block_size,
929 (EXT2_MAX_CLUSTER_LOG_SIZE -
930 EXT2_MIN_CLUSTER_LOG_SIZE)))
931 return;
932 if (!check_super_value(ctx, "clusters_per_group",
933 sb->s_clusters_per_group,
934 MIN_CHECK | MAX_CHECK, 8, cpg_max))
935 return;
936 if (!check_super_value(ctx, "blocks_per_group", sb->s_blocks_per_group,
937 MIN_CHECK | MAX_CHECK, 8, bpg_max))
938 return;
939 if (!check_super_value(ctx, "inodes_per_group", sb->s_inodes_per_group,
940 MIN_CHECK | MAX_CHECK, inodes_per_block, ipg_max))
941 return;
942 if (!check_super_value(ctx, "r_blocks_count", ext2fs_r_blocks_count(sb),
943 MAX_CHECK, 0, ext2fs_blocks_count(sb) / 2))
944 return;
945 if (!check_super_value(ctx, "reserved_gdt_blocks",
946 sb->s_reserved_gdt_blocks, MAX_CHECK, 0,
947 fs->blocksize / sizeof(__u32)))
948 return;
949 if (!check_super_value(ctx, "desc_size",
950 sb->s_desc_size, MAX_CHECK | LOG2_CHECK, 0,
951 EXT2_MAX_DESC_SIZE))
952 return;
953
954 should_be = (__u64)sb->s_inodes_per_group * fs->group_desc_count;
955 if (should_be > ~0U) {
956 pctx.num = should_be;
957 fix_problem(ctx, PR_0_INODE_COUNT_BIG, &pctx);
958 ctx->flags |= E2F_FLAG_ABORT;
959 return;
960 }
961 if (sb->s_inodes_count != should_be) {
962 pctx.ino = sb->s_inodes_count;
963 pctx.ino2 = should_be;
964 if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) {
965 sb->s_inodes_count = should_be;
966 ext2fs_mark_super_dirty(fs);
967 } else {
968 pctx.num = sb->s_inodes_count;
969 pctx.str = "inodes_count";
970 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
971 ctx->flags |= E2F_FLAG_ABORT;
972 return;
973 }
974 }
975 if (sb->s_rev_level > EXT2_GOOD_OLD_REV &&
976 !check_super_value(ctx, "first_ino", sb->s_first_ino,
977 MIN_CHECK | MAX_CHECK,
978 EXT2_GOOD_OLD_FIRST_INO, sb->s_inodes_count))
979 return;
980 inode_size = EXT2_INODE_SIZE(sb);
981 if (!check_super_value(ctx, "inode_size",
982 inode_size, MIN_CHECK | MAX_CHECK | LOG2_CHECK,
983 EXT2_GOOD_OLD_INODE_SIZE, fs->blocksize))
984 return;
985 if (sb->s_blocks_per_group != (sb->s_clusters_per_group *
986 EXT2FS_CLUSTER_RATIO(fs))) {
987 pctx.num = sb->s_clusters_per_group * EXT2FS_CLUSTER_RATIO(fs);
988 pctx.str = "block_size";
989 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
990 ctx->flags |= E2F_FLAG_ABORT;
991 return;
992 }
993
994 if ((ctx->flags & E2F_FLAG_GOT_DEVSIZE) &&
995 (ctx->num_blocks < ext2fs_blocks_count(sb))) {
996 pctx.blk = ext2fs_blocks_count(sb);
997 pctx.blk2 = ctx->num_blocks;
998 if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) {
999 ctx->flags |= E2F_FLAG_ABORT;
1000 return;
1001 }
1002 }
1003
1004 should_be = (sb->s_log_block_size == 0 &&
1005 EXT2FS_CLUSTER_RATIO(fs) == 1) ? 1 : 0;
1006 if (sb->s_first_data_block != should_be) {
1007 pctx.blk = sb->s_first_data_block;
1008 pctx.blk2 = should_be;
1009 fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx);
1010 ctx->flags |= E2F_FLAG_ABORT;
1011 return;
1012 }
1013
1014 if (EXT2_INODE_SIZE(sb) > EXT2_GOOD_OLD_INODE_SIZE) {
1015 unsigned min =
1016 sizeof(((struct ext2_inode_large *) 0)->i_extra_isize) +
1017 sizeof(((struct ext2_inode_large *) 0)->i_checksum_hi);
1018 unsigned max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
1019 pctx.num = sb->s_min_extra_isize;
1020 if (sb->s_min_extra_isize &&
1021 (sb->s_min_extra_isize < min ||
1022 sb->s_min_extra_isize > max ||
1023 sb->s_min_extra_isize & 3) &&
1024 fix_problem(ctx, PR_0_BAD_MIN_EXTRA_ISIZE, &pctx)) {
1025 sb->s_min_extra_isize =
1026 (sizeof(struct ext2_inode_large) -
1027 EXT2_GOOD_OLD_INODE_SIZE);
1028 ext2fs_mark_super_dirty(fs);
1029 }
1030 pctx.num = sb->s_want_extra_isize;
1031 if (sb->s_want_extra_isize &&
1032 (sb->s_want_extra_isize < min ||
1033 sb->s_want_extra_isize > max ||
1034 sb->s_want_extra_isize & 3) &&
1035 fix_problem(ctx, PR_0_BAD_WANT_EXTRA_ISIZE, &pctx)) {
1036 sb->s_want_extra_isize =
1037 (sizeof(struct ext2_inode_large) -
1038 EXT2_GOOD_OLD_INODE_SIZE);
1039 ext2fs_mark_super_dirty(fs);
1040 }
1041 }
1042
1043 /* Are metadata_csum and uninit_bg both set? */
1044 if (ext2fs_has_feature_metadata_csum(fs->super) &&
1045 ext2fs_has_feature_gdt_csum(fs->super) &&
1046 fix_problem(ctx, PR_0_META_AND_GDT_CSUM_SET, &pctx)) {
1047 ext2fs_clear_feature_gdt_csum(fs->super);
1048 ext2fs_mark_super_dirty(fs);
1049 for (i = 0; i < fs->group_desc_count; i++)
1050 ext2fs_group_desc_csum_set(fs, i);
1051 }
1052
1053 /* We can't have ^metadata_csum,metadata_csum_seed */
1054 if (!ext2fs_has_feature_metadata_csum(fs->super) &&
1055 ext2fs_has_feature_csum_seed(fs->super) &&
1056 fix_problem(ctx, PR_0_CSUM_SEED_WITHOUT_META_CSUM, &pctx)) {
1057 ext2fs_clear_feature_csum_seed(fs->super);
1058 fs->super->s_checksum_seed = 0;
1059 ext2fs_mark_super_dirty(fs);
1060 }
1061
1062 /* Is 64bit set and extents unset? */
1063 if (ext2fs_has_feature_64bit(fs->super) &&
1064 !ext2fs_has_feature_extents(fs->super) &&
1065 fix_problem(ctx, PR_0_64BIT_WITHOUT_EXTENTS, &pctx)) {
1066 ext2fs_set_feature_extents(fs->super);
1067 ext2fs_mark_super_dirty(fs);
1068 }
1069
1070 /* Did user ask us to convert files to extents? */
1071 if (ctx->options & E2F_OPT_CONVERT_BMAP) {
1072 ext2fs_set_feature_extents(fs->super);
1073 ext2fs_mark_super_dirty(fs);
1074 }
1075
1076 if (ext2fs_has_feature_meta_bg(fs->super) &&
1077 (fs->super->s_first_meta_bg > fs->desc_blocks)) {
1078 pctx.group = fs->desc_blocks;
1079 pctx.num = fs->super->s_first_meta_bg;
1080 if (fix_problem(ctx, PR_0_FIRST_META_BG_TOO_BIG, &pctx)) {
1081 ext2fs_clear_feature_meta_bg(fs->super);
1082 fs->super->s_first_meta_bg = 0;
1083 ext2fs_mark_super_dirty(fs);
1084 }
1085 }
1086
1087 /*
1088 * Verify the group descriptors....
1089 */
1090 first_block = sb->s_first_data_block;
1091 last_block = ext2fs_blocks_count(sb)-1;
1092
1093 csum_flag = ext2fs_has_group_desc_csum(fs);
1094 for (i = 0; i < fs->group_desc_count; i++) {
1095 pctx.group = i;
1096
1097 if (!ext2fs_has_feature_flex_bg(fs->super)) {
1098 first_block = ext2fs_group_first_block2(fs, i);
1099 last_block = ext2fs_group_last_block2(fs, i);
1100 }
1101
1102 if ((ext2fs_block_bitmap_loc(fs, i) < first_block) ||
1103 (ext2fs_block_bitmap_loc(fs, i) > last_block)) {
1104 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
1105 if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx))
1106 ext2fs_block_bitmap_loc_set(fs, i, 0);
1107 }
1108 if (ext2fs_block_bitmap_loc(fs, i) == 0) {
1109 ctx->invalid_block_bitmap_flag[i]++;
1110 ctx->invalid_bitmaps++;
1111 }
1112 if ((ext2fs_inode_bitmap_loc(fs, i) < first_block) ||
1113 (ext2fs_inode_bitmap_loc(fs, i) > last_block)) {
1114 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
1115 if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx))
1116 ext2fs_inode_bitmap_loc_set(fs, i, 0);
1117 }
1118 if (ext2fs_inode_bitmap_loc(fs, i) == 0) {
1119 ctx->invalid_inode_bitmap_flag[i]++;
1120 ctx->invalid_bitmaps++;
1121 }
1122 if ((ext2fs_inode_table_loc(fs, i) < first_block) ||
1123 ((ext2fs_inode_table_loc(fs, i) +
1124 fs->inode_blocks_per_group - 1) > last_block)) {
1125 pctx.blk = ext2fs_inode_table_loc(fs, i);
1126 if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx))
1127 ext2fs_inode_table_loc_set(fs, i, 0);
1128 }
1129 if (ext2fs_inode_table_loc(fs, i) == 0) {
1130 ctx->invalid_inode_table_flag[i]++;
1131 ctx->invalid_bitmaps++;
1132 }
1133 free_blocks += ext2fs_bg_free_blocks_count(fs, i);
1134 free_inodes += ext2fs_bg_free_inodes_count(fs, i);
1135
1136 if ((ext2fs_bg_free_blocks_count(fs, i) > sb->s_blocks_per_group) ||
1137 (ext2fs_bg_free_inodes_count(fs, i) > sb->s_inodes_per_group) ||
1138 (ext2fs_bg_used_dirs_count(fs, i) > sb->s_inodes_per_group))
1139 ext2fs_unmark_valid(fs);
1140
1141 should_be = 0;
1142 if (!ext2fs_group_desc_csum_verify(fs, i)) {
1143 pctx.csum1 = ext2fs_bg_checksum(fs, i);
1144 pctx.csum2 = ext2fs_group_desc_csum(fs, i);
1145 if (fix_problem(ctx, PR_0_GDT_CSUM, &pctx)) {
1146 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
1147 ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
1148 ext2fs_bg_itable_unused_set(fs, i, 0);
1149 should_be = 1;
1150 }
1151 ext2fs_unmark_valid(fs);
1152 }
1153
1154 if (!csum_flag &&
1155 (ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT) ||
1156 ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT) ||
1157 ext2fs_bg_itable_unused(fs, i) != 0)) {
1158 if (fix_problem(ctx, PR_0_GDT_UNINIT, &pctx)) {
1159 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
1160 ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
1161 ext2fs_bg_itable_unused_set(fs, i, 0);
1162 should_be = 1;
1163 }
1164 ext2fs_unmark_valid(fs);
1165 }
1166
1167 if (i == fs->group_desc_count - 1 &&
1168 ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT)) {
1169 if (fix_problem(ctx, PR_0_BB_UNINIT_LAST, &pctx)) {
1170 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
1171 should_be = 1;
1172 }
1173 ext2fs_unmark_valid(fs);
1174 }
1175
1176 if (csum_flag &&
1177 (ext2fs_bg_itable_unused(fs, i) > ext2fs_bg_free_inodes_count(fs, i) ||
1178 ext2fs_bg_itable_unused(fs, i) > sb->s_inodes_per_group)) {
1179 pctx.blk = ext2fs_bg_itable_unused(fs, i);
1180 if (fix_problem(ctx, PR_0_GDT_ITABLE_UNUSED, &pctx)) {
1181 ext2fs_bg_itable_unused_set(fs, i, 0);
1182 should_be = 1;
1183 }
1184 ext2fs_unmark_valid(fs);
1185 }
1186
1187 if (should_be)
1188 ext2fs_group_desc_csum_set(fs, i);
1189 /* If the user aborts e2fsck by typing ^C, stop right away */
1190 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1191 return;
1192 }
1193
1194 ctx->free_blocks = EXT2FS_C2B(fs, free_blocks);
1195 ctx->free_inodes = free_inodes;
1196
1197 if ((ext2fs_free_blocks_count(sb) > ext2fs_blocks_count(sb)) ||
1198 (sb->s_free_inodes_count > sb->s_inodes_count))
1199 ext2fs_unmark_valid(fs);
1200
1201
1202 /*
1203 * If we have invalid bitmaps, set the error state of the
1204 * filesystem.
1205 */
1206 if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
1207 sb->s_state &= ~EXT2_VALID_FS;
1208 ext2fs_mark_super_dirty(fs);
1209 }
1210
1211 clear_problem_context(&pctx);
1212
1213 #ifndef EXT2_SKIP_UUID
1214 /*
1215 * If the UUID field isn't assigned, assign it.
1216 * Skip if checksums are enabled and the filesystem is mounted,
1217 * if the id changes under the kernel remounting rw may fail.
1218 */
1219 if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid) &&
1220 !ext2fs_has_feature_metadata_csum(ctx->fs->super) &&
1221 (!csum_flag || !(ctx->mount_flags & EXT2_MF_MOUNTED))) {
1222 if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
1223 uuid_generate(sb->s_uuid);
1224 ext2fs_init_csum_seed(fs);
1225 fs->flags |= EXT2_FLAG_DIRTY;
1226 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1227 }
1228 }
1229 #endif
1230
1231 /*
1232 * Check to see if we should disable the test_fs flag
1233 */
1234 profile_get_boolean(ctx->profile, "options",
1235 "clear_test_fs_flag", 0, 1,
1236 &clear_test_fs_flag);
1237 if (!(ctx->options & E2F_OPT_READONLY) &&
1238 clear_test_fs_flag &&
1239 (fs->super->s_flags & EXT2_FLAGS_TEST_FILESYS) &&
1240 (fs_proc_check("ext4") || check_for_modules("ext4"))) {
1241 if (fix_problem(ctx, PR_0_CLEAR_TESTFS_FLAG, &pctx)) {
1242 fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
1243 fs->flags |= EXT2_FLAG_DIRTY;
1244 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1245 }
1246 }
1247
1248 /*
1249 * For the Hurd, check to see if the filetype option is set,
1250 * since it doesn't support it.
1251 */
1252 if (!(ctx->options & E2F_OPT_READONLY) &&
1253 fs->super->s_creator_os == EXT2_OS_HURD &&
1254 ext2fs_has_feature_filetype(fs->super)) {
1255 if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
1256 ext2fs_clear_feature_filetype(fs->super);
1257 ext2fs_mark_super_dirty(fs);
1258 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1259 }
1260 }
1261
1262 /*
1263 * If we have any of the compatibility flags set, we need to have a
1264 * revision 1 filesystem. Most kernels will not check the flags on
1265 * a rev 0 filesystem and we may have corruption issues because of
1266 * the incompatible changes to the filesystem.
1267 */
1268 if (!(ctx->options & E2F_OPT_READONLY) &&
1269 fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
1270 (fs->super->s_feature_compat ||
1271 fs->super->s_feature_ro_compat ||
1272 fs->super->s_feature_incompat) &&
1273 fix_problem(ctx, PR_0_FS_REV_LEVEL, &pctx)) {
1274 ext2fs_update_dynamic_rev(fs);
1275 ext2fs_mark_super_dirty(fs);
1276 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1277 }
1278
1279 /*
1280 * Clean up any orphan inodes, if present.
1281 */
1282 if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
1283 fs->super->s_state &= ~EXT2_VALID_FS;
1284 ext2fs_mark_super_dirty(fs);
1285 }
1286
1287 /*
1288 * Unfortunately, due to Windows' unfortunate design decision
1289 * to configure the hardware clock to tick localtime, instead
1290 * of the more proper and less error-prone UTC time, many
1291 * users end up in the situation where the system clock is
1292 * incorrectly set at the time when e2fsck is run.
1293 *
1294 * Historically this was usually due to some distributions
1295 * having buggy init scripts and/or installers that didn't
1296 * correctly detect this case and take appropriate
1297 * countermeasures. However, it's still possible, despite the
1298 * best efforts of init script and installer authors to not be
1299 * able to detect this misconfiguration, usually due to a
1300 * buggy or misconfigured virtualization manager or the
1301 * installer not having access to a network time server during
1302 * the installation process. So by default, we allow the
1303 * superblock times to be fudged by up to 24 hours. This can
1304 * be disabled by setting options.accept_time_fudge to the
1305 * boolean value of false in e2fsck.conf. We also support
1306 * options.buggy_init_scripts for backwards compatibility.
1307 */
1308 profile_get_boolean(ctx->profile, "options", "accept_time_fudge",
1309 0, 1, &accept_time_fudge);
1310 profile_get_boolean(ctx->profile, "options", "buggy_init_scripts",
1311 0, accept_time_fudge, &accept_time_fudge);
1312 ctx->time_fudge = accept_time_fudge ? 86400 : 0;
1313
1314 profile_get_boolean(ctx->profile, "options", "broken_system_clock",
1315 0, 0, &broken_system_clock);
1316
1317 /*
1318 * Check to see if the superblock last mount time or last
1319 * write time is in the future.
1320 */
1321 if (((ctx->options & E2F_OPT_FORCE) || fs->super->s_checkinterval) &&
1322 !broken_system_clock && !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
1323 (fs->super->s_mtime > (__u32) ctx->now)) {
1324 pctx.num = fs->super->s_mtime;
1325 problem = PR_0_FUTURE_SB_LAST_MOUNT;
1326 if (fs->super->s_mtime <= (__u32) ctx->now + ctx->time_fudge)
1327 problem = PR_0_FUTURE_SB_LAST_MOUNT_FUDGED;
1328 if (fix_problem(ctx, problem, &pctx)) {
1329 fs->super->s_mtime = ctx->now;
1330 fs->flags |= EXT2_FLAG_DIRTY;
1331 }
1332 }
1333 if (((ctx->options & E2F_OPT_FORCE) || fs->super->s_checkinterval) &&
1334 !broken_system_clock && !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
1335 (fs->super->s_wtime > (__u32) ctx->now)) {
1336 pctx.num = fs->super->s_wtime;
1337 problem = PR_0_FUTURE_SB_LAST_WRITE;
1338 if (fs->super->s_wtime <= (__u32) ctx->now + ctx->time_fudge)
1339 problem = PR_0_FUTURE_SB_LAST_WRITE_FUDGED;
1340 if (fix_problem(ctx, problem, &pctx)) {
1341 fs->super->s_wtime = ctx->now;
1342 fs->flags |= EXT2_FLAG_DIRTY;
1343 }
1344 }
1345
1346 e2fsck_validate_quota_inodes(ctx);
1347
1348 /*
1349 * Move the ext3 journal file, if necessary.
1350 */
1351 e2fsck_move_ext3_journal(ctx);
1352
1353 /*
1354 * Fix journal hint, if necessary
1355 */
1356 e2fsck_fix_ext3_journal_hint(ctx);
1357
1358 /*
1359 * Add dirhash hint if necessary
1360 */
1361 e2fsck_fix_dirhash_hint(ctx);
1362
1363 /*
1364 * Hide quota inodes if necessary.
1365 */
1366 e2fsck_hide_quota(ctx);
1367
1368 return;
1369 }
1370
1371 /*
1372 * Check to see if we should backup the master sb to the backup super
1373 * blocks. Returns non-zero if the sb should be backed up.
1374 */
1375
1376 /*
1377 * A few flags are set on the fly by the kernel, but only in the
1378 * primary superblock. This is actually a bad thing, and we should
1379 * try to discourage it in the future. In particular, for the newer
1380 * ext4 files, especially EXT4_FEATURE_RO_COMPAT_DIR_NLINK and
1381 * EXT3_FEATURE_INCOMPAT_EXTENTS. So some of these may go away in the
1382 * future. EXT3_FEATURE_INCOMPAT_RECOVER may also get set when
1383 * copying the primary superblock during online resize.
1384 *
1385 * The kernel will set EXT2_FEATURE_COMPAT_EXT_ATTR, but
1386 * unfortunately, we shouldn't ignore it since if it's not set in the
1387 * backup, the extended attributes in the filesystem will be stripped
1388 * away.
1389 */
1390 #define FEATURE_RO_COMPAT_IGNORE (EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
1391 EXT4_FEATURE_RO_COMPAT_DIR_NLINK| \
1392 EXT4_FEATURE_RO_COMPAT_ORPHAN_PRESENT)
1393 #define FEATURE_INCOMPAT_IGNORE (EXT3_FEATURE_INCOMPAT_EXTENTS| \
1394 EXT3_FEATURE_INCOMPAT_RECOVER)
1395
1396 int check_backup_super_block(e2fsck_t ctx)
1397 {
1398 ext2_filsys fs = ctx->fs;
1399 errcode_t retval;
1400 dgrp_t g;
1401 blk64_t sb;
1402 int ret = 0;
1403 char buf[SUPERBLOCK_SIZE];
1404 struct ext2_super_block *backup_sb;
1405
1406 /*
1407 * If we are already writing out the backup blocks, then we
1408 * don't need to test. Also, if the filesystem is invalid, or
1409 * the check was aborted or cancelled, we also don't want to
1410 * do the backup. If the filesystem was opened read-only then
1411 * we can't do the backup.
1412 */
1413 if (((fs->flags & EXT2_FLAG_MASTER_SB_ONLY) == 0) ||
1414 !ext2fs_test_valid(fs) ||
1415 (fs->super->s_state & EXT2_ERROR_FS) ||
1416 (ctx->flags & (E2F_FLAG_ABORT | E2F_FLAG_CANCEL)) ||
1417 (ctx->options & E2F_OPT_READONLY))
1418 return 0;
1419
1420 for (g = 1; g < fs->group_desc_count; g++) {
1421 if (!ext2fs_bg_has_super(fs, g))
1422 continue;
1423
1424 sb = ext2fs_group_first_block2(fs, g);
1425
1426 retval = io_channel_read_blk(fs->io, sb, -SUPERBLOCK_SIZE,
1427 buf);
1428 if (retval)
1429 continue;
1430 backup_sb = (struct ext2_super_block *) buf;
1431 #ifdef WORDS_BIGENDIAN
1432 ext2fs_swap_super(backup_sb);
1433 #endif
1434 if ((backup_sb->s_magic != EXT2_SUPER_MAGIC) ||
1435 (backup_sb->s_rev_level > EXT2_LIB_CURRENT_REV) ||
1436 ((backup_sb->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) >
1437 EXT2_MAX_BLOCK_LOG_SIZE) ||
1438 (EXT2_INODE_SIZE(backup_sb) < EXT2_GOOD_OLD_INODE_SIZE))
1439 continue;
1440
1441 #define SUPER_INCOMPAT_DIFFERENT(x) \
1442 ((fs->super->x & ~FEATURE_INCOMPAT_IGNORE) != \
1443 (backup_sb->x & ~FEATURE_INCOMPAT_IGNORE))
1444 #define SUPER_RO_COMPAT_DIFFERENT(x) \
1445 ((fs->super->x & ~FEATURE_RO_COMPAT_IGNORE) != \
1446 (backup_sb->x & ~FEATURE_RO_COMPAT_IGNORE))
1447 #define SUPER_DIFFERENT(x) \
1448 (fs->super->x != backup_sb->x)
1449
1450 if (SUPER_DIFFERENT(s_feature_compat) ||
1451 SUPER_INCOMPAT_DIFFERENT(s_feature_incompat) ||
1452 SUPER_RO_COMPAT_DIFFERENT(s_feature_ro_compat) ||
1453 SUPER_DIFFERENT(s_blocks_count) ||
1454 SUPER_DIFFERENT(s_blocks_count_hi) ||
1455 SUPER_DIFFERENT(s_inodes_count) ||
1456 memcmp(fs->super->s_uuid, backup_sb->s_uuid,
1457 sizeof(fs->super->s_uuid)))
1458 ret = 1;
1459 break;
1460 }
1461 return ret;
1462 }
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