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AOSP: e2fsdroid: Don't skip unusable blocks in BaseFS.
[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_update_limits(ctx->qctx, qf_ino, qtype);
285 if (retval)
286 break;
287 }
288 if (retval)
289 quota_release_context(&ctx->qctx);
290 return retval;
291 }
292
293 /* Write all the quota info to disk. */
294 static errcode_t e2fsck_write_all_quotas(e2fsck_t ctx)
295 {
296 struct problem_context pctx;
297 enum quota_type qtype;
298
299 if (!ext2fs_has_feature_quota(ctx->fs->super))
300 return 0;
301
302 clear_problem_context(&pctx);
303 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
304 pctx.num = qtype;
305 pctx.errcode = quota_write_inode(ctx->qctx, 1 << qtype);
306 if (pctx.errcode) {
307 fix_problem(ctx, PR_6_WRITE_QUOTAS, &pctx);
308 break;
309 }
310 }
311
312 quota_release_context(&ctx->qctx);
313 return pctx.errcode;
314 }
315
316 /*
317 * This function releases all of the orphan inodes. It returns 1 if
318 * it hit some error, and 0 on success.
319 */
320 static int release_orphan_inodes(e2fsck_t ctx)
321 {
322 ext2_filsys fs = ctx->fs;
323 ext2_ino_t ino, next_ino;
324 struct ext2_inode_large inode;
325 struct problem_context pctx;
326 char *block_buf;
327
328 if ((ino = fs->super->s_last_orphan) == 0)
329 return 0;
330
331 clear_problem_context(&pctx);
332 pctx.errcode = e2fsck_read_all_quotas(ctx);
333 if (pctx.errcode) {
334 fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
335 return 1;
336 }
337
338 /*
339 * Win or lose, we won't be using the head of the orphan inode
340 * list again.
341 */
342 fs->super->s_last_orphan = 0;
343 ext2fs_mark_super_dirty(fs);
344
345 /*
346 * If the filesystem contains errors, don't run the orphan
347 * list, since the orphan list can't be trusted; and we're
348 * going to be running a full e2fsck run anyway...
349 */
350 if (fs->super->s_state & EXT2_ERROR_FS) {
351 if (ctx->qctx)
352 quota_release_context(&ctx->qctx);
353 return 0;
354 }
355
356 if ((ino < EXT2_FIRST_INODE(fs->super)) ||
357 (ino > fs->super->s_inodes_count)) {
358 clear_problem_context(&pctx);
359 pctx.ino = ino;
360 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
361 goto err_qctx;
362 }
363
364 block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
365 "block iterate buffer");
366 e2fsck_read_bitmaps(ctx);
367
368 while (ino) {
369 e2fsck_read_inode_full(ctx, ino, EXT2_INODE(&inode),
370 sizeof(inode), "release_orphan_inodes");
371 clear_problem_context(&pctx);
372 pctx.ino = ino;
373 pctx.inode = EXT2_INODE(&inode);
374 pctx.str = inode.i_links_count ? _("Truncating") :
375 _("Clearing");
376
377 fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx);
378
379 next_ino = inode.i_dtime;
380 if (next_ino &&
381 ((next_ino < EXT2_FIRST_INODE(fs->super)) ||
382 (next_ino > fs->super->s_inodes_count))) {
383 pctx.ino = next_ino;
384 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
385 goto err_buf;
386 }
387
388 if (release_inode_blocks(ctx, ino, &inode, block_buf, &pctx))
389 goto err_buf;
390
391 if (!inode.i_links_count) {
392 if (ctx->qctx)
393 quota_data_inodes(ctx->qctx, &inode, ino, -1);
394 ext2fs_inode_alloc_stats2(fs, ino, -1,
395 LINUX_S_ISDIR(inode.i_mode));
396 ctx->free_inodes++;
397 inode.i_dtime = ctx->now;
398 } else {
399 inode.i_dtime = 0;
400 }
401 e2fsck_write_inode_full(ctx, ino, EXT2_INODE(&inode),
402 sizeof(inode), "delete_file");
403 ino = next_ino;
404 }
405 ext2fs_free_mem(&block_buf);
406 pctx.errcode = e2fsck_write_all_quotas(ctx);
407 if (pctx.errcode)
408 goto err;
409 return 0;
410 err_buf:
411 ext2fs_free_mem(&block_buf);
412 err_qctx:
413 if (ctx->qctx)
414 quota_release_context(&ctx->qctx);
415 err:
416 return 1;
417 }
418
419 /*
420 * Check the resize inode to make sure it is sane. We check both for
421 * the case where on-line resizing is not enabled (in which case the
422 * resize inode should be cleared) as well as the case where on-line
423 * resizing is enabled.
424 */
425 void check_resize_inode(e2fsck_t ctx)
426 {
427 ext2_filsys fs = ctx->fs;
428 struct ext2_inode inode;
429 struct problem_context pctx;
430 int i, gdt_off, ind_off;
431 dgrp_t j;
432 blk_t blk, pblk;
433 blk_t expect; /* for resize inode, which is 32-bit only */
434 __u32 *dind_buf = 0, *ind_buf;
435 errcode_t retval;
436
437 clear_problem_context(&pctx);
438
439 if (ext2fs_has_feature_resize_inode(fs->super) &&
440 ext2fs_has_feature_meta_bg(fs->super) &&
441 fix_problem(ctx, PR_0_DISABLE_RESIZE_INODE, &pctx)) {
442 ext2fs_clear_feature_resize_inode(fs->super);
443 fs->super->s_reserved_gdt_blocks = 0;
444 ext2fs_mark_super_dirty(fs);
445 }
446
447 /*
448 * If the resize inode feature isn't set, then
449 * s_reserved_gdt_blocks must be zero.
450 */
451 if (!ext2fs_has_feature_resize_inode(fs->super)) {
452 if (fs->super->s_reserved_gdt_blocks) {
453 pctx.num = fs->super->s_reserved_gdt_blocks;
454 if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS,
455 &pctx)) {
456 fs->super->s_reserved_gdt_blocks = 0;
457 ext2fs_mark_super_dirty(fs);
458 }
459 }
460 }
461
462 /* Read the resize inode */
463 pctx.ino = EXT2_RESIZE_INO;
464 retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
465 if (retval) {
466 if (ext2fs_has_feature_resize_inode(fs->super))
467 ctx->flags |= E2F_FLAG_RESIZE_INODE;
468 return;
469 }
470
471 /*
472 * If the resize inode feature isn't set, check to make sure
473 * the resize inode is cleared; then we're done.
474 */
475 if (!ext2fs_has_feature_resize_inode(fs->super)) {
476 for (i=0; i < EXT2_N_BLOCKS; i++) {
477 if (inode.i_block[i])
478 break;
479 }
480 if ((i < EXT2_N_BLOCKS) &&
481 fix_problem(ctx, PR_0_CLEAR_RESIZE_INODE, &pctx)) {
482 memset(&inode, 0, sizeof(inode));
483 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
484 "clear_resize");
485 }
486 return;
487 }
488
489 /*
490 * The resize inode feature is enabled; check to make sure the
491 * only block in use is the double indirect block
492 */
493 blk = inode.i_block[EXT2_DIND_BLOCK];
494 for (i=0; i < EXT2_N_BLOCKS; i++) {
495 if (i != EXT2_DIND_BLOCK && inode.i_block[i])
496 break;
497 }
498 if ((i < EXT2_N_BLOCKS) || !blk || !inode.i_links_count ||
499 !(inode.i_mode & LINUX_S_IFREG) ||
500 (blk < fs->super->s_first_data_block ||
501 blk >= ext2fs_blocks_count(fs->super))) {
502 resize_inode_invalid:
503 if (fix_problem(ctx, PR_0_RESIZE_INODE_INVALID, &pctx)) {
504 memset(&inode, 0, sizeof(inode));
505 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
506 "clear_resize");
507 ctx->flags |= E2F_FLAG_RESIZE_INODE;
508 }
509 if (!(ctx->options & E2F_OPT_READONLY)) {
510 fs->super->s_state &= ~EXT2_VALID_FS;
511 ext2fs_mark_super_dirty(fs);
512 }
513 goto cleanup;
514 }
515 dind_buf = (__u32 *) e2fsck_allocate_memory(ctx, fs->blocksize * 2,
516 "resize dind buffer");
517 ind_buf = (__u32 *) ((char *) dind_buf + fs->blocksize);
518
519 retval = ext2fs_read_ind_block(fs, blk, dind_buf);
520 if (retval)
521 goto resize_inode_invalid;
522
523 gdt_off = fs->desc_blocks;
524 pblk = fs->super->s_first_data_block + 1 + fs->desc_blocks;
525 if (fs->blocksize == 1024 && fs->super->s_first_data_block == 0)
526 pblk++; /* Deal with 1024 blocksize bigalloc fs */
527 for (i = 0; i < fs->super->s_reserved_gdt_blocks / 4;
528 i++, gdt_off++, pblk++) {
529 gdt_off %= fs->blocksize/4;
530 if (dind_buf[gdt_off] != pblk)
531 goto resize_inode_invalid;
532 retval = ext2fs_read_ind_block(fs, pblk, ind_buf);
533 if (retval)
534 goto resize_inode_invalid;
535 ind_off = 0;
536 for (j = 1; j < fs->group_desc_count; j++) {
537 if (!ext2fs_bg_has_super(fs, j))
538 continue;
539 expect = pblk + EXT2_GROUPS_TO_BLOCKS(fs->super, j);
540 if (ind_buf[ind_off] != expect)
541 goto resize_inode_invalid;
542 ind_off++;
543 }
544 }
545
546 cleanup:
547 if (dind_buf)
548 ext2fs_free_mem(&dind_buf);
549
550 }
551
552 /*
553 * This function checks the dirhash signed/unsigned hint if necessary.
554 */
555 static void e2fsck_fix_dirhash_hint(e2fsck_t ctx)
556 {
557 struct ext2_super_block *sb = ctx->fs->super;
558 struct problem_context pctx;
559 char c;
560
561 if ((ctx->options & E2F_OPT_READONLY) ||
562 !ext2fs_has_feature_dir_index(sb) ||
563 (sb->s_flags & (EXT2_FLAGS_SIGNED_HASH|EXT2_FLAGS_UNSIGNED_HASH)))
564 return;
565
566 c = (char) 255;
567
568 clear_problem_context(&pctx);
569 if (fix_problem(ctx, PR_0_DIRHASH_HINT, &pctx)) {
570 if (((int) c) == -1) {
571 sb->s_flags |= EXT2_FLAGS_SIGNED_HASH;
572 } else {
573 sb->s_flags |= EXT2_FLAGS_UNSIGNED_HASH;
574 }
575 ext2fs_mark_super_dirty(ctx->fs);
576 }
577 }
578
579
580 void check_super_block(e2fsck_t ctx)
581 {
582 ext2_filsys fs = ctx->fs;
583 blk64_t first_block, last_block;
584 struct ext2_super_block *sb = fs->super;
585 unsigned int ipg_max;
586 problem_t problem;
587 blk64_t blocks_per_group = fs->super->s_blocks_per_group;
588 __u32 bpg_max, cpg_max;
589 __u64 blks_max;
590 int inodes_per_block;
591 int inode_size;
592 int accept_time_fudge;
593 int broken_system_clock;
594 dgrp_t i;
595 blk64_t should_be;
596 struct problem_context pctx;
597 blk64_t free_blocks = 0;
598 ext2_ino_t free_inodes = 0;
599 int csum_flag, clear_test_fs_flag;
600
601 inodes_per_block = EXT2_INODES_PER_BLOCK(fs->super);
602 ipg_max = inodes_per_block * (blocks_per_group - 4);
603 if (ipg_max > EXT2_MAX_INODES_PER_GROUP(sb))
604 ipg_max = EXT2_MAX_INODES_PER_GROUP(sb);
605 cpg_max = 8 * EXT2_BLOCK_SIZE(sb);
606 if (cpg_max > EXT2_MAX_CLUSTERS_PER_GROUP(sb))
607 cpg_max = EXT2_MAX_CLUSTERS_PER_GROUP(sb);
608 bpg_max = 8 * EXT2_BLOCK_SIZE(sb) * EXT2FS_CLUSTER_RATIO(fs);
609 if (bpg_max > EXT2_MAX_BLOCKS_PER_GROUP(sb))
610 bpg_max = EXT2_MAX_BLOCKS_PER_GROUP(sb);
611
612 ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
613 sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap");
614 ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
615 sizeof(int) * fs->group_desc_count, "invalid_block_bitmap");
616 ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx,
617 sizeof(int) * fs->group_desc_count, "invalid_inode_table");
618
619 blks_max = (1ULL << 32) * EXT2_MAX_BLOCKS_PER_GROUP(fs->super);
620 if (ext2fs_has_feature_64bit(fs->super)) {
621 if (blks_max > ((1ULL << 48) - 1))
622 blks_max = (1ULL << 48) - 1;
623 } else {
624 if (blks_max > ((1ULL << 32) - 1))
625 blks_max = (1ULL << 32) - 1;
626 }
627
628 clear_problem_context(&pctx);
629
630 /*
631 * Verify the super block constants...
632 */
633 if (!check_super_value(ctx, "inodes_count", sb->s_inodes_count,
634 MIN_CHECK, 1, 0))
635 return;
636 if (!check_super_value64(ctx, "blocks_count", ext2fs_blocks_count(sb),
637 MIN_CHECK | MAX_CHECK, 1, blks_max))
638 return;
639 if (!check_super_value(ctx, "first_data_block", sb->s_first_data_block,
640 MAX_CHECK, 0, ext2fs_blocks_count(sb)))
641 return;
642 if (!check_super_value(ctx, "log_block_size", sb->s_log_block_size,
643 MIN_CHECK | MAX_CHECK, 0,
644 EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE))
645 return;
646 if (!check_super_value(ctx, "log_cluster_size",
647 sb->s_log_cluster_size,
648 MIN_CHECK | MAX_CHECK, sb->s_log_block_size,
649 (EXT2_MAX_CLUSTER_LOG_SIZE -
650 EXT2_MIN_CLUSTER_LOG_SIZE)))
651 return;
652 if (!check_super_value(ctx, "clusters_per_group",
653 sb->s_clusters_per_group,
654 MIN_CHECK | MAX_CHECK, 8, cpg_max))
655 return;
656 if (!check_super_value(ctx, "blocks_per_group", sb->s_blocks_per_group,
657 MIN_CHECK | MAX_CHECK, 8, bpg_max))
658 return;
659 if (!check_super_value(ctx, "inodes_per_group", sb->s_inodes_per_group,
660 MIN_CHECK | MAX_CHECK, inodes_per_block, ipg_max))
661 return;
662 if (!check_super_value(ctx, "r_blocks_count", ext2fs_r_blocks_count(sb),
663 MAX_CHECK, 0, ext2fs_blocks_count(sb) / 2))
664 return;
665 if (!check_super_value(ctx, "reserved_gdt_blocks",
666 sb->s_reserved_gdt_blocks, MAX_CHECK, 0,
667 fs->blocksize / sizeof(__u32)))
668 return;
669 if (!check_super_value(ctx, "desc_size",
670 sb->s_desc_size, MAX_CHECK | LOG2_CHECK, 0,
671 EXT2_MAX_DESC_SIZE))
672 return;
673
674 should_be = (__u64)sb->s_inodes_per_group * fs->group_desc_count;
675 if (should_be > ~0U) {
676 pctx.num = should_be;
677 fix_problem(ctx, PR_0_INODE_COUNT_BIG, &pctx);
678 ctx->flags |= E2F_FLAG_ABORT;
679 return;
680 }
681 if (sb->s_inodes_count != should_be) {
682 pctx.ino = sb->s_inodes_count;
683 pctx.ino2 = should_be;
684 if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) {
685 sb->s_inodes_count = should_be;
686 ext2fs_mark_super_dirty(fs);
687 } else {
688 pctx.num = sb->s_inodes_count;
689 pctx.str = "inodes_count";
690 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
691 ctx->flags |= E2F_FLAG_ABORT;
692 return;
693 }
694 }
695 if (sb->s_rev_level > EXT2_GOOD_OLD_REV &&
696 !check_super_value(ctx, "first_ino", sb->s_first_ino,
697 MIN_CHECK | MAX_CHECK,
698 EXT2_GOOD_OLD_FIRST_INO, sb->s_inodes_count))
699 return;
700 inode_size = EXT2_INODE_SIZE(sb);
701 if (!check_super_value(ctx, "inode_size",
702 inode_size, MIN_CHECK | MAX_CHECK | LOG2_CHECK,
703 EXT2_GOOD_OLD_INODE_SIZE, fs->blocksize))
704 return;
705 if (sb->s_blocks_per_group != (sb->s_clusters_per_group *
706 EXT2FS_CLUSTER_RATIO(fs))) {
707 pctx.num = sb->s_clusters_per_group * EXT2FS_CLUSTER_RATIO(fs);
708 pctx.str = "block_size";
709 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
710 ctx->flags |= E2F_FLAG_ABORT;
711 return;
712 }
713
714 if ((ctx->flags & E2F_FLAG_GOT_DEVSIZE) &&
715 (ctx->num_blocks < ext2fs_blocks_count(sb))) {
716 pctx.blk = ext2fs_blocks_count(sb);
717 pctx.blk2 = ctx->num_blocks;
718 if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) {
719 ctx->flags |= E2F_FLAG_ABORT;
720 return;
721 }
722 }
723
724 should_be = (sb->s_log_block_size == 0 &&
725 EXT2FS_CLUSTER_RATIO(fs) == 1) ? 1 : 0;
726 if (sb->s_first_data_block != should_be) {
727 pctx.blk = sb->s_first_data_block;
728 pctx.blk2 = should_be;
729 fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx);
730 ctx->flags |= E2F_FLAG_ABORT;
731 return;
732 }
733
734 if (EXT2_INODE_SIZE(sb) > EXT2_GOOD_OLD_INODE_SIZE) {
735 unsigned min =
736 sizeof(((struct ext2_inode_large *) 0)->i_extra_isize) +
737 sizeof(((struct ext2_inode_large *) 0)->i_checksum_hi);
738 unsigned max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
739 pctx.num = sb->s_min_extra_isize;
740 if (sb->s_min_extra_isize &&
741 (sb->s_min_extra_isize < min ||
742 sb->s_min_extra_isize > max ||
743 sb->s_min_extra_isize & 3) &&
744 fix_problem(ctx, PR_0_BAD_MIN_EXTRA_ISIZE, &pctx)) {
745 sb->s_min_extra_isize =
746 (sizeof(struct ext2_inode_large) -
747 EXT2_GOOD_OLD_INODE_SIZE);
748 ext2fs_mark_super_dirty(fs);
749 }
750 pctx.num = sb->s_want_extra_isize;
751 if (sb->s_want_extra_isize &&
752 (sb->s_want_extra_isize < min ||
753 sb->s_want_extra_isize > max ||
754 sb->s_want_extra_isize & 3) &&
755 fix_problem(ctx, PR_0_BAD_WANT_EXTRA_ISIZE, &pctx)) {
756 sb->s_want_extra_isize =
757 (sizeof(struct ext2_inode_large) -
758 EXT2_GOOD_OLD_INODE_SIZE);
759 ext2fs_mark_super_dirty(fs);
760 }
761 }
762
763 /* Are metadata_csum and uninit_bg both set? */
764 if (ext2fs_has_feature_metadata_csum(fs->super) &&
765 ext2fs_has_feature_gdt_csum(fs->super) &&
766 fix_problem(ctx, PR_0_META_AND_GDT_CSUM_SET, &pctx)) {
767 ext2fs_clear_feature_gdt_csum(fs->super);
768 ext2fs_mark_super_dirty(fs);
769 for (i = 0; i < fs->group_desc_count; i++)
770 ext2fs_group_desc_csum_set(fs, i);
771 }
772
773 /* We can't have ^metadata_csum,metadata_csum_seed */
774 if (!ext2fs_has_feature_metadata_csum(fs->super) &&
775 ext2fs_has_feature_csum_seed(fs->super) &&
776 fix_problem(ctx, PR_0_CSUM_SEED_WITHOUT_META_CSUM, &pctx)) {
777 ext2fs_clear_feature_csum_seed(fs->super);
778 fs->super->s_checksum_seed = 0;
779 ext2fs_mark_super_dirty(fs);
780 }
781
782 /* Is 64bit set and extents unset? */
783 if (ext2fs_has_feature_64bit(fs->super) &&
784 !ext2fs_has_feature_extents(fs->super) &&
785 fix_problem(ctx, PR_0_64BIT_WITHOUT_EXTENTS, &pctx)) {
786 ext2fs_set_feature_extents(fs->super);
787 ext2fs_mark_super_dirty(fs);
788 }
789
790 /* Did user ask us to convert files to extents? */
791 if (ctx->options & E2F_OPT_CONVERT_BMAP) {
792 ext2fs_set_feature_extents(fs->super);
793 ext2fs_mark_super_dirty(fs);
794 }
795
796 if (ext2fs_has_feature_meta_bg(fs->super) &&
797 (fs->super->s_first_meta_bg > fs->desc_blocks)) {
798 pctx.group = fs->desc_blocks;
799 pctx.num = fs->super->s_first_meta_bg;
800 if (fix_problem(ctx, PR_0_FIRST_META_BG_TOO_BIG, &pctx)) {
801 ext2fs_clear_feature_meta_bg(fs->super);
802 fs->super->s_first_meta_bg = 0;
803 ext2fs_mark_super_dirty(fs);
804 }
805 }
806
807 /*
808 * Verify the group descriptors....
809 */
810 first_block = sb->s_first_data_block;
811 last_block = ext2fs_blocks_count(sb)-1;
812
813 csum_flag = ext2fs_has_group_desc_csum(fs);
814 for (i = 0; i < fs->group_desc_count; i++) {
815 pctx.group = i;
816
817 if (!ext2fs_has_feature_flex_bg(fs->super)) {
818 first_block = ext2fs_group_first_block2(fs, i);
819 last_block = ext2fs_group_last_block2(fs, i);
820 }
821
822 if ((ext2fs_block_bitmap_loc(fs, i) < first_block) ||
823 (ext2fs_block_bitmap_loc(fs, i) > last_block)) {
824 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
825 if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx))
826 ext2fs_block_bitmap_loc_set(fs, i, 0);
827 }
828 if (ext2fs_block_bitmap_loc(fs, i) == 0) {
829 ctx->invalid_block_bitmap_flag[i]++;
830 ctx->invalid_bitmaps++;
831 }
832 if ((ext2fs_inode_bitmap_loc(fs, i) < first_block) ||
833 (ext2fs_inode_bitmap_loc(fs, i) > last_block)) {
834 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
835 if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx))
836 ext2fs_inode_bitmap_loc_set(fs, i, 0);
837 }
838 if (ext2fs_inode_bitmap_loc(fs, i) == 0) {
839 ctx->invalid_inode_bitmap_flag[i]++;
840 ctx->invalid_bitmaps++;
841 }
842 if ((ext2fs_inode_table_loc(fs, i) < first_block) ||
843 ((ext2fs_inode_table_loc(fs, i) +
844 fs->inode_blocks_per_group - 1) > last_block)) {
845 pctx.blk = ext2fs_inode_table_loc(fs, i);
846 if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx))
847 ext2fs_inode_table_loc_set(fs, i, 0);
848 }
849 if (ext2fs_inode_table_loc(fs, i) == 0) {
850 ctx->invalid_inode_table_flag[i]++;
851 ctx->invalid_bitmaps++;
852 }
853 free_blocks += ext2fs_bg_free_blocks_count(fs, i);
854 free_inodes += ext2fs_bg_free_inodes_count(fs, i);
855
856 if ((ext2fs_bg_free_blocks_count(fs, i) > sb->s_blocks_per_group) ||
857 (ext2fs_bg_free_inodes_count(fs, i) > sb->s_inodes_per_group) ||
858 (ext2fs_bg_used_dirs_count(fs, i) > sb->s_inodes_per_group))
859 ext2fs_unmark_valid(fs);
860
861 should_be = 0;
862 if (!ext2fs_group_desc_csum_verify(fs, i)) {
863 pctx.csum1 = ext2fs_bg_checksum(fs, i);
864 pctx.csum2 = ext2fs_group_desc_csum(fs, i);
865 if (fix_problem(ctx, PR_0_GDT_CSUM, &pctx)) {
866 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
867 ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
868 ext2fs_bg_itable_unused_set(fs, i, 0);
869 should_be = 1;
870 }
871 ext2fs_unmark_valid(fs);
872 }
873
874 if (!csum_flag &&
875 (ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT) ||
876 ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT) ||
877 ext2fs_bg_itable_unused(fs, i) != 0)) {
878 if (fix_problem(ctx, PR_0_GDT_UNINIT, &pctx)) {
879 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
880 ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
881 ext2fs_bg_itable_unused_set(fs, i, 0);
882 should_be = 1;
883 }
884 ext2fs_unmark_valid(fs);
885 }
886
887 if (i == fs->group_desc_count - 1 &&
888 ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT)) {
889 if (fix_problem(ctx, PR_0_BB_UNINIT_LAST, &pctx)) {
890 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
891 should_be = 1;
892 }
893 ext2fs_unmark_valid(fs);
894 }
895
896 if (csum_flag &&
897 (ext2fs_bg_itable_unused(fs, i) > ext2fs_bg_free_inodes_count(fs, i) ||
898 ext2fs_bg_itable_unused(fs, i) > sb->s_inodes_per_group)) {
899 pctx.blk = ext2fs_bg_itable_unused(fs, i);
900 if (fix_problem(ctx, PR_0_GDT_ITABLE_UNUSED, &pctx)) {
901 ext2fs_bg_itable_unused_set(fs, i, 0);
902 should_be = 1;
903 }
904 ext2fs_unmark_valid(fs);
905 }
906
907 if (should_be)
908 ext2fs_group_desc_csum_set(fs, i);
909 /* If the user aborts e2fsck by typing ^C, stop right away */
910 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
911 return;
912 }
913
914 ctx->free_blocks = EXT2FS_C2B(fs, free_blocks);
915 ctx->free_inodes = free_inodes;
916
917 if ((ext2fs_free_blocks_count(sb) > ext2fs_blocks_count(sb)) ||
918 (sb->s_free_inodes_count > sb->s_inodes_count))
919 ext2fs_unmark_valid(fs);
920
921
922 /*
923 * If we have invalid bitmaps, set the error state of the
924 * filesystem.
925 */
926 if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
927 sb->s_state &= ~EXT2_VALID_FS;
928 ext2fs_mark_super_dirty(fs);
929 }
930
931 clear_problem_context(&pctx);
932
933 #ifndef EXT2_SKIP_UUID
934 /*
935 * If the UUID field isn't assigned, assign it.
936 * Skip if checksums are enabled and the filesystem is mounted,
937 * if the id changes under the kernel remounting rw may fail.
938 */
939 if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid) &&
940 !ext2fs_has_feature_metadata_csum(ctx->fs->super) &&
941 (!csum_flag || !(ctx->mount_flags & EXT2_MF_MOUNTED))) {
942 if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
943 uuid_generate(sb->s_uuid);
944 ext2fs_init_csum_seed(fs);
945 fs->flags |= EXT2_FLAG_DIRTY;
946 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
947 }
948 }
949 #endif
950
951 /*
952 * Check to see if we should disable the test_fs flag
953 */
954 profile_get_boolean(ctx->profile, "options",
955 "clear_test_fs_flag", 0, 1,
956 &clear_test_fs_flag);
957 if (!(ctx->options & E2F_OPT_READONLY) &&
958 clear_test_fs_flag &&
959 (fs->super->s_flags & EXT2_FLAGS_TEST_FILESYS) &&
960 (fs_proc_check("ext4") || check_for_modules("ext4"))) {
961 if (fix_problem(ctx, PR_0_CLEAR_TESTFS_FLAG, &pctx)) {
962 fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
963 fs->flags |= EXT2_FLAG_DIRTY;
964 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
965 }
966 }
967
968 /*
969 * For the Hurd, check to see if the filetype option is set,
970 * since it doesn't support it.
971 */
972 if (!(ctx->options & E2F_OPT_READONLY) &&
973 fs->super->s_creator_os == EXT2_OS_HURD &&
974 ext2fs_has_feature_filetype(fs->super)) {
975 if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
976 ext2fs_clear_feature_filetype(fs->super);
977 ext2fs_mark_super_dirty(fs);
978 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
979 }
980 }
981
982 /*
983 * If we have any of the compatibility flags set, we need to have a
984 * revision 1 filesystem. Most kernels will not check the flags on
985 * a rev 0 filesystem and we may have corruption issues because of
986 * the incompatible changes to the filesystem.
987 */
988 if (!(ctx->options & E2F_OPT_READONLY) &&
989 fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
990 (fs->super->s_feature_compat ||
991 fs->super->s_feature_ro_compat ||
992 fs->super->s_feature_incompat) &&
993 fix_problem(ctx, PR_0_FS_REV_LEVEL, &pctx)) {
994 ext2fs_update_dynamic_rev(fs);
995 ext2fs_mark_super_dirty(fs);
996 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
997 }
998
999 /*
1000 * Clean up any orphan inodes, if present.
1001 */
1002 if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
1003 fs->super->s_state &= ~EXT2_VALID_FS;
1004 ext2fs_mark_super_dirty(fs);
1005 }
1006
1007 /*
1008 * Unfortunately, due to Windows' unfortunate design decision
1009 * to configure the hardware clock to tick localtime, instead
1010 * of the more proper and less error-prone UTC time, many
1011 * users end up in the situation where the system clock is
1012 * incorrectly set at the time when e2fsck is run.
1013 *
1014 * Historically this was usually due to some distributions
1015 * having buggy init scripts and/or installers that didn't
1016 * correctly detect this case and take appropriate
1017 * countermeasures. However, it's still possible, despite the
1018 * best efforts of init script and installer authors to not be
1019 * able to detect this misconfiguration, usually due to a
1020 * buggy or misconfigured virtualization manager or the
1021 * installer not having access to a network time server during
1022 * the installation process. So by default, we allow the
1023 * superblock times to be fudged by up to 24 hours. This can
1024 * be disabled by setting options.accept_time_fudge to the
1025 * boolean value of false in e2fsck.conf. We also support
1026 * options.buggy_init_scripts for backwards compatibility.
1027 */
1028 profile_get_boolean(ctx->profile, "options", "accept_time_fudge",
1029 0, 1, &accept_time_fudge);
1030 profile_get_boolean(ctx->profile, "options", "buggy_init_scripts",
1031 0, accept_time_fudge, &accept_time_fudge);
1032 ctx->time_fudge = accept_time_fudge ? 86400 : 0;
1033
1034 profile_get_boolean(ctx->profile, "options", "broken_system_clock",
1035 0, 0, &broken_system_clock);
1036
1037 /*
1038 * Check to see if the superblock last mount time or last
1039 * write time is in the future.
1040 */
1041 if (!broken_system_clock && fs->super->s_checkinterval &&
1042 !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
1043 fs->super->s_mtime > (__u32) ctx->now) {
1044 pctx.num = fs->super->s_mtime;
1045 problem = PR_0_FUTURE_SB_LAST_MOUNT;
1046 if (fs->super->s_mtime <= (__u32) ctx->now + ctx->time_fudge)
1047 problem = PR_0_FUTURE_SB_LAST_MOUNT_FUDGED;
1048 if (fix_problem(ctx, problem, &pctx)) {
1049 fs->super->s_mtime = ctx->now;
1050 fs->flags |= EXT2_FLAG_DIRTY;
1051 }
1052 }
1053 if (!broken_system_clock && fs->super->s_checkinterval &&
1054 !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
1055 fs->super->s_wtime > (__u32) ctx->now) {
1056 pctx.num = fs->super->s_wtime;
1057 problem = PR_0_FUTURE_SB_LAST_WRITE;
1058 if (fs->super->s_wtime <= (__u32) ctx->now + ctx->time_fudge)
1059 problem = PR_0_FUTURE_SB_LAST_WRITE_FUDGED;
1060 if (fix_problem(ctx, problem, &pctx)) {
1061 fs->super->s_wtime = ctx->now;
1062 fs->flags |= EXT2_FLAG_DIRTY;
1063 }
1064 }
1065
1066 e2fsck_validate_quota_inodes(ctx);
1067
1068 /*
1069 * Move the ext3 journal file, if necessary.
1070 */
1071 e2fsck_move_ext3_journal(ctx);
1072
1073 /*
1074 * Fix journal hint, if necessary
1075 */
1076 e2fsck_fix_ext3_journal_hint(ctx);
1077
1078 /*
1079 * Add dirhash hint if necessary
1080 */
1081 e2fsck_fix_dirhash_hint(ctx);
1082
1083 /*
1084 * Hide quota inodes if necessary.
1085 */
1086 e2fsck_hide_quota(ctx);
1087
1088 return;
1089 }
1090
1091 /*
1092 * Check to see if we should backup the master sb to the backup super
1093 * blocks. Returns non-zero if the sb should be backed up.
1094 */
1095
1096 /*
1097 * A few flags are set on the fly by the kernel, but only in the
1098 * primary superblock. This is actually a bad thing, and we should
1099 * try to discourage it in the future. In particular, for the newer
1100 * ext4 files, especially EXT4_FEATURE_RO_COMPAT_DIR_NLINK and
1101 * EXT3_FEATURE_INCOMPAT_EXTENTS. So some of these may go away in the
1102 * future. EXT3_FEATURE_INCOMPAT_RECOVER may also get set when
1103 * copying the primary superblock during online resize.
1104 *
1105 * The kernel will set EXT2_FEATURE_COMPAT_EXT_ATTR, but
1106 * unfortunately, we shouldn't ignore it since if it's not set in the
1107 * backup, the extended attributes in the filesystem will be stripped
1108 * away.
1109 */
1110 #define FEATURE_RO_COMPAT_IGNORE (EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
1111 EXT4_FEATURE_RO_COMPAT_DIR_NLINK)
1112 #define FEATURE_INCOMPAT_IGNORE (EXT3_FEATURE_INCOMPAT_EXTENTS| \
1113 EXT3_FEATURE_INCOMPAT_RECOVER)
1114
1115 int check_backup_super_block(e2fsck_t ctx)
1116 {
1117 ext2_filsys fs = ctx->fs;
1118 errcode_t retval;
1119 dgrp_t g;
1120 blk64_t sb;
1121 int ret = 0;
1122 char buf[SUPERBLOCK_SIZE];
1123 struct ext2_super_block *backup_sb;
1124
1125 /*
1126 * If we are already writing out the backup blocks, then we
1127 * don't need to test. Also, if the filesystem is invalid, or
1128 * the check was aborted or cancelled, we also don't want to
1129 * do the backup. If the filesystem was opened read-only then
1130 * we can't do the backup.
1131 */
1132 if (((fs->flags & EXT2_FLAG_MASTER_SB_ONLY) == 0) ||
1133 !ext2fs_test_valid(fs) ||
1134 (fs->super->s_state & EXT2_ERROR_FS) ||
1135 (ctx->flags & (E2F_FLAG_ABORT | E2F_FLAG_CANCEL)) ||
1136 (ctx->options & E2F_OPT_READONLY))
1137 return 0;
1138
1139 for (g = 1; g < fs->group_desc_count; g++) {
1140 if (!ext2fs_bg_has_super(fs, g))
1141 continue;
1142
1143 sb = ext2fs_group_first_block2(fs, g);
1144
1145 retval = io_channel_read_blk(fs->io, sb, -SUPERBLOCK_SIZE,
1146 buf);
1147 if (retval)
1148 continue;
1149 backup_sb = (struct ext2_super_block *) buf;
1150 #ifdef WORDS_BIGENDIAN
1151 ext2fs_swap_super(backup_sb);
1152 #endif
1153 if ((backup_sb->s_magic != EXT2_SUPER_MAGIC) ||
1154 (backup_sb->s_rev_level > EXT2_LIB_CURRENT_REV) ||
1155 ((backup_sb->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) >
1156 EXT2_MAX_BLOCK_LOG_SIZE) ||
1157 (EXT2_INODE_SIZE(backup_sb) < EXT2_GOOD_OLD_INODE_SIZE))
1158 continue;
1159
1160 #define SUPER_INCOMPAT_DIFFERENT(x) \
1161 ((fs->super->x & ~FEATURE_INCOMPAT_IGNORE) != \
1162 (backup_sb->x & ~FEATURE_INCOMPAT_IGNORE))
1163 #define SUPER_RO_COMPAT_DIFFERENT(x) \
1164 ((fs->super->x & ~FEATURE_RO_COMPAT_IGNORE) != \
1165 (backup_sb->x & ~FEATURE_RO_COMPAT_IGNORE))
1166 #define SUPER_DIFFERENT(x) \
1167 (fs->super->x != backup_sb->x)
1168
1169 if (SUPER_DIFFERENT(s_feature_compat) ||
1170 SUPER_INCOMPAT_DIFFERENT(s_feature_incompat) ||
1171 SUPER_RO_COMPAT_DIFFERENT(s_feature_ro_compat) ||
1172 SUPER_DIFFERENT(s_blocks_count) ||
1173 SUPER_DIFFERENT(s_blocks_count_hi) ||
1174 SUPER_DIFFERENT(s_inodes_count) ||
1175 memcmp(fs->super->s_uuid, backup_sb->s_uuid,
1176 sizeof(fs->super->s_uuid)))
1177 ret = 1;
1178 break;
1179 }
1180 return ret;
1181 }
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