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-rw-r--r--e2fsprogs/e2fsck/super.c713
1 files changed, 713 insertions, 0 deletions
diff --git a/e2fsprogs/e2fsck/super.c b/e2fsprogs/e2fsck/super.c
new file mode 100644
index 000000000..294cd80e4
--- /dev/null
+++ b/e2fsprogs/e2fsck/super.c
@@ -0,0 +1,713 @@
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#ifdef HAVE_ERRNO_H
13#include <errno.h>
14#endif
15
16#ifndef EXT2_SKIP_UUID
17#include "uuid/uuid.h"
18#endif
19#include "e2fsck.h"
20#include "problem.h"
21
22#define MIN_CHECK 1
23#define MAX_CHECK 2
24
25static void check_super_value(e2fsck_t ctx, const char *descr,
26 unsigned long value, int flags,
27 unsigned long min_val, unsigned long max_val)
28{
29 struct problem_context pctx;
30
31 if (((flags & MIN_CHECK) && (value < min_val)) ||
32 ((flags & MAX_CHECK) && (value > max_val))) {
33 clear_problem_context(&pctx);
34 pctx.num = value;
35 pctx.str = descr;
36 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
37 ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
38 }
39}
40
41/*
42 * This routine may get stubbed out in special compilations of the
43 * e2fsck code..
44 */
45#ifndef EXT2_SPECIAL_DEVICE_SIZE
46errcode_t e2fsck_get_device_size(e2fsck_t ctx)
47{
48 return (ext2fs_get_device_size(ctx->filesystem_name,
49 EXT2_BLOCK_SIZE(ctx->fs->super),
50 &ctx->num_blocks));
51}
52#endif
53
54/*
55 * helper function to release an inode
56 */
57struct process_block_struct {
58 e2fsck_t ctx;
59 char *buf;
60 struct problem_context *pctx;
61 int truncating;
62 int truncate_offset;
63 e2_blkcnt_t truncate_block;
64 int truncated_blocks;
65 int abort;
66 errcode_t errcode;
67};
68
69static int release_inode_block(ext2_filsys fs,
70 blk_t *block_nr,
71 e2_blkcnt_t blockcnt,
72 blk_t ref_blk EXT2FS_ATTR((unused)),
73 int ref_offset EXT2FS_ATTR((unused)),
74 void *priv_data)
75{
76 struct process_block_struct *pb;
77 e2fsck_t ctx;
78 struct problem_context *pctx;
79 blk_t blk = *block_nr;
80 int retval = 0;
81
82 pb = (struct process_block_struct *) priv_data;
83 ctx = pb->ctx;
84 pctx = pb->pctx;
85
86 pctx->blk = blk;
87 pctx->blkcount = blockcnt;
88
89 if (HOLE_BLKADDR(blk))
90 return 0;
91
92 if ((blk < fs->super->s_first_data_block) ||
93 (blk >= fs->super->s_blocks_count)) {
94 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM, pctx);
95 return_abort:
96 pb->abort = 1;
97 return BLOCK_ABORT;
98 }
99
100 if (!ext2fs_test_block_bitmap(fs->block_map, blk)) {
101 fix_problem(ctx, PR_0_ORPHAN_ALREADY_CLEARED_BLOCK, pctx);
102 goto return_abort;
103 }
104
105 /*
106 * If we are deleting an orphan, then we leave the fields alone.
107 * If we are truncating an orphan, then update the inode fields
108 * and clean up any partial block data.
109 */
110 if (pb->truncating) {
111 /*
112 * We only remove indirect blocks if they are
113 * completely empty.
114 */
115 if (blockcnt < 0) {
116 int i, limit;
117 blk_t *bp;
118
119 pb->errcode = io_channel_read_blk(fs->io, blk, 1,
120 pb->buf);
121 if (pb->errcode)
122 goto return_abort;
123
124 limit = fs->blocksize >> 2;
125 for (i = 0, bp = (blk_t *) pb->buf;
126 i < limit; i++, bp++)
127 if (*bp)
128 return 0;
129 }
130 /*
131 * We don't remove direct blocks until we've reached
132 * the truncation block.
133 */
134 if (blockcnt >= 0 && blockcnt < pb->truncate_block)
135 return 0;
136 /*
137 * If part of the last block needs truncating, we do
138 * it here.
139 */
140 if ((blockcnt == pb->truncate_block) && pb->truncate_offset) {
141 pb->errcode = io_channel_read_blk(fs->io, blk, 1,
142 pb->buf);
143 if (pb->errcode)
144 goto return_abort;
145 memset(pb->buf + pb->truncate_offset, 0,
146 fs->blocksize - pb->truncate_offset);
147 pb->errcode = io_channel_write_blk(fs->io, blk, 1,
148 pb->buf);
149 if (pb->errcode)
150 goto return_abort;
151 }
152 pb->truncated_blocks++;
153 *block_nr = 0;
154 retval |= BLOCK_CHANGED;
155 }
156
157 ext2fs_block_alloc_stats(fs, blk, -1);
158 return retval;
159}
160
161/*
162 * This function releases an inode. Returns 1 if an inconsistency was
163 * found. If the inode has a link count, then it is being truncated and
164 * not deleted.
165 */
166static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
167 struct ext2_inode *inode, char *block_buf,
168 struct problem_context *pctx)
169{
170 struct process_block_struct pb;
171 ext2_filsys fs = ctx->fs;
172 errcode_t retval;
173 __u32 count;
174
175 if (!ext2fs_inode_has_valid_blocks(inode))
176 return 0;
177
178 pb.buf = block_buf + 3 * ctx->fs->blocksize;
179 pb.ctx = ctx;
180 pb.abort = 0;
181 pb.errcode = 0;
182 pb.pctx = pctx;
183 if (inode->i_links_count) {
184 pb.truncating = 1;
185 pb.truncate_block = (e2_blkcnt_t)
186 ((((long long)inode->i_size_high << 32) +
187 inode->i_size + fs->blocksize - 1) /
188 fs->blocksize);
189 pb.truncate_offset = inode->i_size % fs->blocksize;
190 } else {
191 pb.truncating = 0;
192 pb.truncate_block = 0;
193 pb.truncate_offset = 0;
194 }
195 pb.truncated_blocks = 0;
196 retval = ext2fs_block_iterate2(fs, ino, BLOCK_FLAG_DEPTH_TRAVERSE,
197 block_buf, release_inode_block, &pb);
198 if (retval) {
199 com_err("release_inode_blocks", retval,
200 _("while calling ext2fs_block_iterate for inode %d"),
201 ino);
202 return 1;
203 }
204 if (pb.abort)
205 return 1;
206
207 /* Refresh the inode since ext2fs_block_iterate may have changed it */
208 e2fsck_read_inode(ctx, ino, inode, "release_inode_blocks");
209
210 if (pb.truncated_blocks)
211 inode->i_blocks -= pb.truncated_blocks *
212 (fs->blocksize / 512);
213
214 if (inode->i_file_acl) {
215 retval = ext2fs_adjust_ea_refcount(fs, inode->i_file_acl,
216 block_buf, -1, &count);
217 if (retval == EXT2_ET_BAD_EA_BLOCK_NUM) {
218 retval = 0;
219 count = 1;
220 }
221 if (retval) {
222 com_err("release_inode_blocks", retval,
223 _("while calling ext2fs_adjust_ea_refocunt for inode %d"),
224 ino);
225 return 1;
226 }
227 if (count == 0)
228 ext2fs_block_alloc_stats(fs, inode->i_file_acl, -1);
229 inode->i_file_acl = 0;
230 }
231 return 0;
232}
233
234/*
235 * This function releases all of the orphan inodes. It returns 1 if
236 * it hit some error, and 0 on success.
237 */
238static int release_orphan_inodes(e2fsck_t ctx)
239{
240 ext2_filsys fs = ctx->fs;
241 ext2_ino_t ino, next_ino;
242 struct ext2_inode inode;
243 struct problem_context pctx;
244 char *block_buf;
245
246 if ((ino = fs->super->s_last_orphan) == 0)
247 return 0;
248
249 /*
250 * Win or lose, we won't be using the head of the orphan inode
251 * list again.
252 */
253 fs->super->s_last_orphan = 0;
254 ext2fs_mark_super_dirty(fs);
255
256 /*
257 * If the filesystem contains errors, don't run the orphan
258 * list, since the orphan list can't be trusted; and we're
259 * going to be running a full e2fsck run anyway...
260 */
261 if (fs->super->s_state & EXT2_ERROR_FS)
262 return 0;
263
264 if ((ino < EXT2_FIRST_INODE(fs->super)) ||
265 (ino > fs->super->s_inodes_count)) {
266 clear_problem_context(&pctx);
267 pctx.ino = ino;
268 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
269 return 1;
270 }
271
272 block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
273 "block iterate buffer");
274 e2fsck_read_bitmaps(ctx);
275
276 while (ino) {
277 e2fsck_read_inode(ctx, ino, &inode, "release_orphan_inodes");
278 clear_problem_context(&pctx);
279 pctx.ino = ino;
280 pctx.inode = &inode;
281 pctx.str = inode.i_links_count ? _("Truncating") :
282 _("Clearing");
283
284 fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx);
285
286 next_ino = inode.i_dtime;
287 if (next_ino &&
288 ((next_ino < EXT2_FIRST_INODE(fs->super)) ||
289 (next_ino > fs->super->s_inodes_count))) {
290 pctx.ino = next_ino;
291 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
292 goto return_abort;
293 }
294
295 if (release_inode_blocks(ctx, ino, &inode, block_buf, &pctx))
296 goto return_abort;
297
298 if (!inode.i_links_count) {
299 ext2fs_inode_alloc_stats2(fs, ino, -1,
300 LINUX_S_ISDIR(inode.i_mode));
301 inode.i_dtime = time(0);
302 } else {
303 inode.i_dtime = 0;
304 }
305 e2fsck_write_inode(ctx, ino, &inode, "delete_file");
306 ino = next_ino;
307 }
308 ext2fs_free_mem(&block_buf);
309 return 0;
310return_abort:
311 ext2fs_free_mem(&block_buf);
312 return 1;
313}
314
315/*
316 * Check the resize inode to make sure it is sane. We check both for
317 * the case where on-line resizing is not enabled (in which case the
318 * resize inode should be cleared) as well as the case where on-line
319 * resizing is enabled.
320 */
321void check_resize_inode(e2fsck_t ctx)
322{
323 ext2_filsys fs = ctx->fs;
324 struct ext2_inode inode;
325 struct problem_context pctx;
326 int i, j, gdt_off, ind_off;
327 blk_t blk, pblk, expect;
328 __u32 *dind_buf = 0, *ind_buf;
329 errcode_t retval;
330
331 clear_problem_context(&pctx);
332
333 /*
334 * If the resize inode feature isn't set, then
335 * s_reserved_gdt_blocks must be zero.
336 */
337 if (!(fs->super->s_feature_compat &
338 EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
339 if (fs->super->s_reserved_gdt_blocks) {
340 pctx.num = fs->super->s_reserved_gdt_blocks;
341 if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS,
342 &pctx)) {
343 fs->super->s_reserved_gdt_blocks = 0;
344 ext2fs_mark_super_dirty(fs);
345 }
346 }
347 }
348
349 /* Read the resizde inode */
350 pctx.ino = EXT2_RESIZE_INO;
351 retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
352 if (retval) {
353 if (fs->super->s_feature_compat &
354 EXT2_FEATURE_COMPAT_RESIZE_INODE)
355 ctx->flags |= E2F_FLAG_RESIZE_INODE;
356 return;
357 }
358
359 /*
360 * If the resize inode feature isn't set, check to make sure
361 * the resize inode is cleared; then we're done.
362 */
363 if (!(fs->super->s_feature_compat &
364 EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
365 for (i=0; i < EXT2_N_BLOCKS; i++) {
366 if (inode.i_block[i])
367 break;
368 }
369 if ((i < EXT2_N_BLOCKS) &&
370 fix_problem(ctx, PR_0_CLEAR_RESIZE_INODE, &pctx)) {
371 memset(&inode, 0, sizeof(inode));
372 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
373 "clear_resize");
374 }
375 return;
376 }
377
378 /*
379 * The resize inode feature is enabled; check to make sure the
380 * only block in use is the double indirect block
381 */
382 blk = inode.i_block[EXT2_DIND_BLOCK];
383 for (i=0; i < EXT2_N_BLOCKS; i++) {
384 if (i != EXT2_DIND_BLOCK && inode.i_block[i])
385 break;
386 }
387 if ((i < EXT2_N_BLOCKS) || !blk || !inode.i_links_count ||
388 !(inode.i_mode & LINUX_S_IFREG) ||
389 (blk < fs->super->s_first_data_block ||
390 blk >= fs->super->s_blocks_count)) {
391 resize_inode_invalid:
392 if (fix_problem(ctx, PR_0_RESIZE_INODE_INVALID, &pctx)) {
393 memset(&inode, 0, sizeof(inode));
394 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
395 "clear_resize");
396 ctx->flags |= E2F_FLAG_RESIZE_INODE;
397 }
398 if (!(ctx->options & E2F_OPT_READONLY)) {
399 fs->super->s_state &= ~EXT2_VALID_FS;
400 ext2fs_mark_super_dirty(fs);
401 }
402 goto cleanup;
403 }
404 dind_buf = (__u32 *) e2fsck_allocate_memory(ctx, fs->blocksize * 2,
405 "resize dind buffer");
406 ind_buf = (__u32 *) ((char *) dind_buf + fs->blocksize);
407
408 retval = ext2fs_read_ind_block(fs, blk, dind_buf);
409 if (retval)
410 goto resize_inode_invalid;
411
412 gdt_off = fs->desc_blocks;
413 pblk = fs->super->s_first_data_block + 1 + fs->desc_blocks;
414 for (i = 0; i < fs->super->s_reserved_gdt_blocks / 4;
415 i++, gdt_off++, pblk++) {
416 gdt_off %= fs->blocksize/4;
417 if (dind_buf[gdt_off] != pblk)
418 goto resize_inode_invalid;
419 retval = ext2fs_read_ind_block(fs, pblk, ind_buf);
420 if (retval)
421 goto resize_inode_invalid;
422 ind_off = 0;
423 for (j = 1; j < fs->group_desc_count; j++) {
424 if (!ext2fs_bg_has_super(fs, j))
425 continue;
426 expect = pblk + (j * fs->super->s_blocks_per_group);
427 if (ind_buf[ind_off] != expect)
428 goto resize_inode_invalid;
429 ind_off++;
430 }
431 }
432
433cleanup:
434 if (dind_buf)
435 ext2fs_free_mem(&dind_buf);
436
437 }
438
439void check_super_block(e2fsck_t ctx)
440{
441 ext2_filsys fs = ctx->fs;
442 blk_t first_block, last_block;
443 struct ext2_super_block *sb = fs->super;
444 struct ext2_group_desc *gd;
445 blk_t blocks_per_group = fs->super->s_blocks_per_group;
446 blk_t bpg_max;
447 int inodes_per_block;
448 int ipg_max;
449 int inode_size;
450 dgrp_t i;
451 blk_t should_be;
452 struct problem_context pctx;
453 __u32 free_blocks = 0, free_inodes = 0;
454
455 inodes_per_block = EXT2_INODES_PER_BLOCK(fs->super);
456 ipg_max = inodes_per_block * (blocks_per_group - 4);
457 if (ipg_max > EXT2_MAX_INODES_PER_GROUP(sb))
458 ipg_max = EXT2_MAX_INODES_PER_GROUP(sb);
459 bpg_max = 8 * EXT2_BLOCK_SIZE(sb);
460 if (bpg_max > EXT2_MAX_BLOCKS_PER_GROUP(sb))
461 bpg_max = EXT2_MAX_BLOCKS_PER_GROUP(sb);
462
463 ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
464 sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap");
465 ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
466 sizeof(int) * fs->group_desc_count, "invalid_block_bitmap");
467 ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx,
468 sizeof(int) * fs->group_desc_count, "invalid_inode_table");
469
470 clear_problem_context(&pctx);
471
472 /*
473 * Verify the super block constants...
474 */
475 check_super_value(ctx, "inodes_count", sb->s_inodes_count,
476 MIN_CHECK, 1, 0);
477 check_super_value(ctx, "blocks_count", sb->s_blocks_count,
478 MIN_CHECK, 1, 0);
479 check_super_value(ctx, "first_data_block", sb->s_first_data_block,
480 MAX_CHECK, 0, sb->s_blocks_count);
481 check_super_value(ctx, "log_block_size", sb->s_log_block_size,
482 MIN_CHECK | MAX_CHECK, 0,
483 EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE);
484 check_super_value(ctx, "log_frag_size", sb->s_log_frag_size,
485 MIN_CHECK | MAX_CHECK, 0, sb->s_log_block_size);
486 check_super_value(ctx, "frags_per_group", sb->s_frags_per_group,
487 MIN_CHECK | MAX_CHECK, sb->s_blocks_per_group,
488 bpg_max);
489 check_super_value(ctx, "blocks_per_group", sb->s_blocks_per_group,
490 MIN_CHECK | MAX_CHECK, 8, bpg_max);
491 check_super_value(ctx, "inodes_per_group", sb->s_inodes_per_group,
492 MIN_CHECK | MAX_CHECK, inodes_per_block, ipg_max);
493 check_super_value(ctx, "r_blocks_count", sb->s_r_blocks_count,
494 MAX_CHECK, 0, sb->s_blocks_count / 2);
495 check_super_value(ctx, "reserved_gdt_blocks",
496 sb->s_reserved_gdt_blocks, MAX_CHECK, 0,
497 fs->blocksize/4);
498 inode_size = EXT2_INODE_SIZE(sb);
499 check_super_value(ctx, "inode_size",
500 inode_size, MIN_CHECK | MAX_CHECK,
501 EXT2_GOOD_OLD_INODE_SIZE, fs->blocksize);
502 if (inode_size & (inode_size - 1)) {
503 pctx.num = inode_size;
504 pctx.str = "inode_size";
505 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
506 ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
507 return;
508 }
509
510 if (!ctx->num_blocks) {
511 pctx.errcode = e2fsck_get_device_size(ctx);
512 if (pctx.errcode && pctx.errcode != EXT2_ET_UNIMPLEMENTED) {
513 fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
514 ctx->flags |= E2F_FLAG_ABORT;
515 return;
516 }
517 if ((pctx.errcode != EXT2_ET_UNIMPLEMENTED) &&
518 (ctx->num_blocks < sb->s_blocks_count)) {
519 pctx.blk = sb->s_blocks_count;
520 pctx.blk2 = ctx->num_blocks;
521 if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) {
522 ctx->flags |= E2F_FLAG_ABORT;
523 return;
524 }
525 }
526 }
527
528 if (sb->s_log_block_size != (__u32) sb->s_log_frag_size) {
529 pctx.blk = EXT2_BLOCK_SIZE(sb);
530 pctx.blk2 = EXT2_FRAG_SIZE(sb);
531 fix_problem(ctx, PR_0_NO_FRAGMENTS, &pctx);
532 ctx->flags |= E2F_FLAG_ABORT;
533 return;
534 }
535
536 should_be = sb->s_frags_per_group >>
537 (sb->s_log_block_size - sb->s_log_frag_size);
538 if (sb->s_blocks_per_group != should_be) {
539 pctx.blk = sb->s_blocks_per_group;
540 pctx.blk2 = should_be;
541 fix_problem(ctx, PR_0_BLOCKS_PER_GROUP, &pctx);
542 ctx->flags |= E2F_FLAG_ABORT;
543 return;
544 }
545
546 should_be = (sb->s_log_block_size == 0) ? 1 : 0;
547 if (sb->s_first_data_block != should_be) {
548 pctx.blk = sb->s_first_data_block;
549 pctx.blk2 = should_be;
550 fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx);
551 ctx->flags |= E2F_FLAG_ABORT;
552 return;
553 }
554
555 should_be = sb->s_inodes_per_group * fs->group_desc_count;
556 if (sb->s_inodes_count != should_be) {
557 pctx.ino = sb->s_inodes_count;
558 pctx.ino2 = should_be;
559 if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) {
560 sb->s_inodes_count = should_be;
561 ext2fs_mark_super_dirty(fs);
562 }
563 }
564
565 /*
566 * Verify the group descriptors....
567 */
568 first_block = sb->s_first_data_block;
569 last_block = first_block + blocks_per_group;
570
571 for (i = 0, gd=fs->group_desc; i < fs->group_desc_count; i++, gd++) {
572 pctx.group = i;
573
574 if (i == fs->group_desc_count - 1)
575 last_block = sb->s_blocks_count;
576 if ((gd->bg_block_bitmap < first_block) ||
577 (gd->bg_block_bitmap >= last_block)) {
578 pctx.blk = gd->bg_block_bitmap;
579 if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx))
580 gd->bg_block_bitmap = 0;
581 }
582 if (gd->bg_block_bitmap == 0) {
583 ctx->invalid_block_bitmap_flag[i]++;
584 ctx->invalid_bitmaps++;
585 }
586 if ((gd->bg_inode_bitmap < first_block) ||
587 (gd->bg_inode_bitmap >= last_block)) {
588 pctx.blk = gd->bg_inode_bitmap;
589 if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx))
590 gd->bg_inode_bitmap = 0;
591 }
592 if (gd->bg_inode_bitmap == 0) {
593 ctx->invalid_inode_bitmap_flag[i]++;
594 ctx->invalid_bitmaps++;
595 }
596 if ((gd->bg_inode_table < first_block) ||
597 ((gd->bg_inode_table +
598 fs->inode_blocks_per_group - 1) >= last_block)) {
599 pctx.blk = gd->bg_inode_table;
600 if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx))
601 gd->bg_inode_table = 0;
602 }
603 if (gd->bg_inode_table == 0) {
604 ctx->invalid_inode_table_flag[i]++;
605 ctx->invalid_bitmaps++;
606 }
607 free_blocks += gd->bg_free_blocks_count;
608 free_inodes += gd->bg_free_inodes_count;
609 first_block += sb->s_blocks_per_group;
610 last_block += sb->s_blocks_per_group;
611
612 if ((gd->bg_free_blocks_count > sb->s_blocks_per_group) ||
613 (gd->bg_free_inodes_count > sb->s_inodes_per_group) ||
614 (gd->bg_used_dirs_count > sb->s_inodes_per_group))
615 ext2fs_unmark_valid(fs);
616
617 }
618
619 /*
620 * Update the global counts from the block group counts. This
621 * is needed for an experimental patch which eliminates
622 * locking the entire filesystem when allocating blocks or
623 * inodes; if the filesystem is not unmounted cleanly, the
624 * global counts may not be accurate.
625 */
626 if ((free_blocks != sb->s_free_blocks_count) ||
627 (free_inodes != sb->s_free_inodes_count)) {
628 if (ctx->options & E2F_OPT_READONLY)
629 ext2fs_unmark_valid(fs);
630 else {
631 sb->s_free_blocks_count = free_blocks;
632 sb->s_free_inodes_count = free_inodes;
633 ext2fs_mark_super_dirty(fs);
634 }
635 }
636
637 if ((sb->s_free_blocks_count > sb->s_blocks_count) ||
638 (sb->s_free_inodes_count > sb->s_inodes_count))
639 ext2fs_unmark_valid(fs);
640
641
642 /*
643 * If we have invalid bitmaps, set the error state of the
644 * filesystem.
645 */
646 if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
647 sb->s_state &= ~EXT2_VALID_FS;
648 ext2fs_mark_super_dirty(fs);
649 }
650
651 clear_problem_context(&pctx);
652
653#ifndef EXT2_SKIP_UUID
654 /*
655 * If the UUID field isn't assigned, assign it.
656 */
657 if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid)) {
658 if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
659 uuid_generate(sb->s_uuid);
660 ext2fs_mark_super_dirty(fs);
661 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
662 }
663 }
664#endif
665
666 /*
667 * For the Hurd, check to see if the filetype option is set,
668 * since it doesn't support it.
669 */
670 if (!(ctx->options & E2F_OPT_READONLY) &&
671 fs->super->s_creator_os == EXT2_OS_HURD &&
672 (fs->super->s_feature_incompat &
673 EXT2_FEATURE_INCOMPAT_FILETYPE)) {
674 if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
675 fs->super->s_feature_incompat &=
676 ~EXT2_FEATURE_INCOMPAT_FILETYPE;
677 ext2fs_mark_super_dirty(fs);
678
679 }
680 }
681
682 /*
683 * If we have any of the compatibility flags set, we need to have a
684 * revision 1 filesystem. Most kernels will not check the flags on
685 * a rev 0 filesystem and we may have corruption issues because of
686 * the incompatible changes to the filesystem.
687 */
688 if (!(ctx->options & E2F_OPT_READONLY) &&
689 fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
690 (fs->super->s_feature_compat ||
691 fs->super->s_feature_ro_compat ||
692 fs->super->s_feature_incompat) &&
693 fix_problem(ctx, PR_0_FS_REV_LEVEL, &pctx)) {
694 ext2fs_update_dynamic_rev(fs);
695 ext2fs_mark_super_dirty(fs);
696 }
697
698 check_resize_inode(ctx);
699
700 /*
701 * Clean up any orphan inodes, if present.
702 */
703 if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
704 fs->super->s_state &= ~EXT2_VALID_FS;
705 ext2fs_mark_super_dirty(fs);
706 }
707
708 /*
709 * Move the ext3 journal file, if necessary.
710 */
711 e2fsck_move_ext3_journal(ctx);
712 return;
713}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-15 02:50:14 +0000