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Commit | Line | Data |
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1b6bf175 TT |
1 | /* |
2 | * e2fsck.c - superblock checks | |
efc6f628 | 3 | * |
1b6bf175 TT |
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 | ||
1b6bf175 TT |
12 | #ifdef HAVE_ERRNO_H |
13 | #include <errno.h> | |
14 | #endif | |
1b6bf175 | 15 | |
54be2ccc | 16 | #ifndef EXT2_SKIP_UUID |
1b6bf175 | 17 | #include "uuid/uuid.h" |
54be2ccc | 18 | #endif |
1b6bf175 TT |
19 | #include "e2fsck.h" |
20 | #include "problem.h" | |
1b6bf175 TT |
21 | |
22 | #define MIN_CHECK 1 | |
23 | #define MAX_CHECK 2 | |
24 | ||
25 | static void check_super_value(e2fsck_t ctx, const char *descr, | |
26 | unsigned long value, int flags, | |
7f813ba3 | 27 | unsigned long min_val, unsigned long max_val) |
1b6bf175 TT |
28 | { |
29 | struct problem_context pctx; | |
30 | ||
7f813ba3 TT |
31 | if (((flags & MIN_CHECK) && (value < min_val)) || |
32 | ((flags & MAX_CHECK) && (value > max_val))) { | |
1b6bf175 TT |
33 | clear_problem_context(&pctx); |
34 | pctx.num = value; | |
35 | pctx.str = descr; | |
36 | fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx); | |
08b21301 | 37 | ctx->flags |= E2F_FLAG_ABORT; /* never get here! */ |
1b6bf175 TT |
38 | } |
39 | } | |
40 | ||
80bfaa3e TT |
41 | /* |
42 | * helper function to release an inode | |
43 | */ | |
44 | struct process_block_struct { | |
8394902e TT |
45 | e2fsck_t ctx; |
46 | char *buf; | |
80bfaa3e | 47 | struct problem_context *pctx; |
8394902e TT |
48 | int truncating; |
49 | int truncate_offset; | |
54434927 | 50 | e2_blkcnt_t truncate_block; |
8394902e TT |
51 | int truncated_blocks; |
52 | int abort; | |
53 | errcode_t errcode; | |
80bfaa3e TT |
54 | }; |
55 | ||
56 | static int release_inode_block(ext2_filsys fs, | |
57 | blk_t *block_nr, | |
54434927 TT |
58 | e2_blkcnt_t blockcnt, |
59 | blk_t ref_blk EXT2FS_ATTR((unused)), | |
60 | int ref_offset EXT2FS_ATTR((unused)), | |
80bfaa3e TT |
61 | void *priv_data) |
62 | { | |
63 | struct process_block_struct *pb; | |
8394902e TT |
64 | e2fsck_t ctx; |
65 | struct problem_context *pctx; | |
66 | blk_t blk = *block_nr; | |
67 | int retval = 0; | |
80bfaa3e TT |
68 | |
69 | pb = (struct process_block_struct *) priv_data; | |
70 | ctx = pb->ctx; | |
71 | pctx = pb->pctx; | |
72 | ||
73 | pctx->blk = blk; | |
74 | pctx->blkcount = blockcnt; | |
75 | ||
76 | if (HOLE_BLKADDR(blk)) | |
77 | return 0; | |
78 | ||
79 | if ((blk < fs->super->s_first_data_block) || | |
80 | (blk >= fs->super->s_blocks_count)) { | |
81 | fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM, pctx); | |
53ef44c4 | 82 | return_abort: |
80bfaa3e TT |
83 | pb->abort = 1; |
84 | return BLOCK_ABORT; | |
85 | } | |
86 | ||
87 | if (!ext2fs_test_block_bitmap(fs->block_map, blk)) { | |
88 | fix_problem(ctx, PR_0_ORPHAN_ALREADY_CLEARED_BLOCK, pctx); | |
53ef44c4 | 89 | goto return_abort; |
8394902e TT |
90 | } |
91 | ||
92 | /* | |
93 | * If we are deleting an orphan, then we leave the fields alone. | |
94 | * If we are truncating an orphan, then update the inode fields | |
95 | * and clean up any partial block data. | |
96 | */ | |
97 | if (pb->truncating) { | |
98 | /* | |
99 | * We only remove indirect blocks if they are | |
100 | * completely empty. | |
101 | */ | |
102 | if (blockcnt < 0) { | |
103 | int i, limit; | |
53ef44c4 | 104 | blk_t *bp; |
efc6f628 | 105 | |
8394902e TT |
106 | pb->errcode = io_channel_read_blk(fs->io, blk, 1, |
107 | pb->buf); | |
108 | if (pb->errcode) | |
53ef44c4 | 109 | goto return_abort; |
8394902e TT |
110 | |
111 | limit = fs->blocksize >> 2; | |
53ef44c4 TT |
112 | for (i = 0, bp = (blk_t *) pb->buf; |
113 | i < limit; i++, bp++) | |
114 | if (*bp) | |
8394902e TT |
115 | return 0; |
116 | } | |
117 | /* | |
118 | * We don't remove direct blocks until we've reached | |
119 | * the truncation block. | |
120 | */ | |
121 | if (blockcnt >= 0 && blockcnt < pb->truncate_block) | |
122 | return 0; | |
123 | /* | |
124 | * If part of the last block needs truncating, we do | |
125 | * it here. | |
126 | */ | |
127 | if ((blockcnt == pb->truncate_block) && pb->truncate_offset) { | |
128 | pb->errcode = io_channel_read_blk(fs->io, blk, 1, | |
129 | pb->buf); | |
130 | if (pb->errcode) | |
53ef44c4 | 131 | goto return_abort; |
8394902e TT |
132 | memset(pb->buf + pb->truncate_offset, 0, |
133 | fs->blocksize - pb->truncate_offset); | |
134 | pb->errcode = io_channel_write_blk(fs->io, blk, 1, | |
135 | pb->buf); | |
136 | if (pb->errcode) | |
53ef44c4 | 137 | goto return_abort; |
8394902e TT |
138 | } |
139 | pb->truncated_blocks++; | |
140 | *block_nr = 0; | |
141 | retval |= BLOCK_CHANGED; | |
80bfaa3e | 142 | } |
efc6f628 | 143 | |
0684a4f3 | 144 | ext2fs_block_alloc_stats(fs, blk, -1); |
8394902e | 145 | return retval; |
80bfaa3e | 146 | } |
efc6f628 | 147 | |
80bfaa3e TT |
148 | /* |
149 | * This function releases an inode. Returns 1 if an inconsistency was | |
8394902e TT |
150 | * found. If the inode has a link count, then it is being truncated and |
151 | * not deleted. | |
80bfaa3e | 152 | */ |
86c627ec | 153 | static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino, |
721edd0e | 154 | struct ext2_inode *inode, char *block_buf, |
80bfaa3e TT |
155 | struct problem_context *pctx) |
156 | { | |
0684a4f3 | 157 | struct process_block_struct pb; |
8394902e | 158 | ext2_filsys fs = ctx->fs; |
80bfaa3e | 159 | errcode_t retval; |
0684a4f3 | 160 | __u32 count; |
80bfaa3e | 161 | |
42475e28 TT |
162 | if (!ext2fs_inode_has_valid_blocks(inode)) |
163 | return 0; | |
164 | ||
8394902e | 165 | pb.buf = block_buf + 3 * ctx->fs->blocksize; |
80bfaa3e TT |
166 | pb.ctx = ctx; |
167 | pb.abort = 0; | |
8394902e | 168 | pb.errcode = 0; |
80bfaa3e | 169 | pb.pctx = pctx; |
8394902e TT |
170 | if (inode->i_links_count) { |
171 | pb.truncating = 1; | |
54434927 | 172 | pb.truncate_block = (e2_blkcnt_t) |
8394902e TT |
173 | ((((long long)inode->i_size_high << 32) + |
174 | inode->i_size + fs->blocksize - 1) / | |
175 | fs->blocksize); | |
176 | pb.truncate_offset = inode->i_size % fs->blocksize; | |
177 | } else { | |
178 | pb.truncating = 0; | |
179 | pb.truncate_block = 0; | |
180 | pb.truncate_offset = 0; | |
181 | } | |
182 | pb.truncated_blocks = 0; | |
efc6f628 | 183 | retval = ext2fs_block_iterate2(fs, ino, BLOCK_FLAG_DEPTH_TRAVERSE, |
8394902e | 184 | block_buf, release_inode_block, &pb); |
80bfaa3e | 185 | if (retval) { |
8394902e | 186 | com_err("release_inode_blocks", retval, |
80bfaa3e TT |
187 | _("while calling ext2fs_block_iterate for inode %d"), |
188 | ino); | |
189 | return 1; | |
190 | } | |
191 | if (pb.abort) | |
192 | return 1; | |
193 | ||
8394902e TT |
194 | /* Refresh the inode since ext2fs_block_iterate may have changed it */ |
195 | e2fsck_read_inode(ctx, ino, inode, "release_inode_blocks"); | |
196 | ||
197 | if (pb.truncated_blocks) | |
1ca1059f | 198 | ext2fs_iblk_sub_blocks(fs, inode, pb.truncated_blocks); |
8394902e | 199 | |
0684a4f3 TT |
200 | if (inode->i_file_acl) { |
201 | retval = ext2fs_adjust_ea_refcount(fs, inode->i_file_acl, | |
202 | block_buf, -1, &count); | |
203 | if (retval == EXT2_ET_BAD_EA_BLOCK_NUM) { | |
204 | retval = 0; | |
205 | count = 1; | |
206 | } | |
207 | if (retval) { | |
208 | com_err("release_inode_blocks", retval, | |
a3e025c7 | 209 | _("while calling ext2fs_adjust_ea_refcount for inode %d"), |
0684a4f3 TT |
210 | ino); |
211 | return 1; | |
212 | } | |
213 | if (count == 0) | |
214 | ext2fs_block_alloc_stats(fs, inode->i_file_acl, -1); | |
215 | inode->i_file_acl = 0; | |
216 | } | |
80bfaa3e TT |
217 | return 0; |
218 | } | |
219 | ||
220 | /* | |
221 | * This function releases all of the orphan inodes. It returns 1 if | |
222 | * it hit some error, and 0 on success. | |
223 | */ | |
224 | static int release_orphan_inodes(e2fsck_t ctx) | |
225 | { | |
226 | ext2_filsys fs = ctx->fs; | |
86c627ec | 227 | ext2_ino_t ino, next_ino; |
80bfaa3e TT |
228 | struct ext2_inode inode; |
229 | struct problem_context pctx; | |
230 | char *block_buf; | |
231 | ||
232 | if ((ino = fs->super->s_last_orphan) == 0) | |
233 | return 0; | |
234 | ||
25c63ba0 TT |
235 | /* |
236 | * Win or lose, we won't be using the head of the orphan inode | |
237 | * list again. | |
238 | */ | |
239 | fs->super->s_last_orphan = 0; | |
240 | ext2fs_mark_super_dirty(fs); | |
eb4ab510 TT |
241 | |
242 | /* | |
243 | * If the filesystem contains errors, don't run the orphan | |
244 | * list, since the orphan list can't be trusted; and we're | |
245 | * going to be running a full e2fsck run anyway... | |
246 | */ | |
247 | if (fs->super->s_state & EXT2_ERROR_FS) | |
248 | return 0; | |
efc6f628 | 249 | |
80bfaa3e TT |
250 | if ((ino < EXT2_FIRST_INODE(fs->super)) || |
251 | (ino > fs->super->s_inodes_count)) { | |
252 | clear_problem_context(&pctx); | |
53ef44c4 | 253 | pctx.ino = ino; |
80bfaa3e TT |
254 | fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx); |
255 | return 1; | |
256 | } | |
257 | ||
8394902e | 258 | block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4, |
9b565759 | 259 | "block iterate buffer"); |
80bfaa3e | 260 | e2fsck_read_bitmaps(ctx); |
efc6f628 | 261 | |
80bfaa3e | 262 | while (ino) { |
8394902e | 263 | e2fsck_read_inode(ctx, ino, &inode, "release_orphan_inodes"); |
80bfaa3e | 264 | clear_problem_context(&pctx); |
ecf1b776 | 265 | pctx.ino = ino; |
80bfaa3e | 266 | pctx.inode = &inode; |
f0b8c87d TT |
267 | pctx.str = inode.i_links_count ? _("Truncating") : |
268 | _("Clearing"); | |
80bfaa3e | 269 | |
8394902e | 270 | fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx); |
ecf1b776 | 271 | |
80bfaa3e TT |
272 | next_ino = inode.i_dtime; |
273 | if (next_ino && | |
99a2cc96 TT |
274 | ((next_ino < EXT2_FIRST_INODE(fs->super)) || |
275 | (next_ino > fs->super->s_inodes_count))) { | |
276 | pctx.ino = next_ino; | |
80bfaa3e | 277 | fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx); |
53ef44c4 | 278 | goto return_abort; |
80bfaa3e TT |
279 | } |
280 | ||
8394902e | 281 | if (release_inode_blocks(ctx, ino, &inode, block_buf, &pctx)) |
53ef44c4 | 282 | goto return_abort; |
ecf1b776 | 283 | |
8394902e | 284 | if (!inode.i_links_count) { |
0684a4f3 TT |
285 | ext2fs_inode_alloc_stats2(fs, ino, -1, |
286 | LINUX_S_ISDIR(inode.i_mode)); | |
1f3ad14a | 287 | inode.i_dtime = ctx->now; |
eb16f861 ST |
288 | } else { |
289 | inode.i_dtime = 0; | |
8394902e TT |
290 | } |
291 | e2fsck_write_inode(ctx, ino, &inode, "delete_file"); | |
80bfaa3e TT |
292 | ino = next_ino; |
293 | } | |
c4e3d3f3 | 294 | ext2fs_free_mem(&block_buf); |
80bfaa3e | 295 | return 0; |
53ef44c4 | 296 | return_abort: |
c4e3d3f3 | 297 | ext2fs_free_mem(&block_buf); |
80bfaa3e TT |
298 | return 1; |
299 | } | |
300 | ||
c3ffaf83 TT |
301 | /* |
302 | * Check the resize inode to make sure it is sane. We check both for | |
303 | * the case where on-line resizing is not enabled (in which case the | |
304 | * resize inode should be cleared) as well as the case where on-line | |
305 | * resizing is enabled. | |
306 | */ | |
69d0edfd | 307 | void check_resize_inode(e2fsck_t ctx) |
c3ffaf83 TT |
308 | { |
309 | ext2_filsys fs = ctx->fs; | |
310 | struct ext2_inode inode; | |
311 | struct problem_context pctx; | |
642935c0 TT |
312 | int i, gdt_off, ind_off; |
313 | dgrp_t j; | |
c3ffaf83 TT |
314 | blk_t blk, pblk, expect; |
315 | __u32 *dind_buf = 0, *ind_buf; | |
316 | errcode_t retval; | |
317 | ||
318 | clear_problem_context(&pctx); | |
c3ffaf83 | 319 | |
efc6f628 TT |
320 | /* |
321 | * If the resize inode feature isn't set, then | |
ea774315 | 322 | * s_reserved_gdt_blocks must be zero. |
c3ffaf83 | 323 | */ |
efc6f628 | 324 | if (!(fs->super->s_feature_compat & |
c3ffaf83 TT |
325 | EXT2_FEATURE_COMPAT_RESIZE_INODE)) { |
326 | if (fs->super->s_reserved_gdt_blocks) { | |
327 | pctx.num = fs->super->s_reserved_gdt_blocks; | |
328 | if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS, | |
329 | &pctx)) { | |
330 | fs->super->s_reserved_gdt_blocks = 0; | |
331 | ext2fs_mark_super_dirty(fs); | |
332 | } | |
333 | } | |
ea774315 TT |
334 | } |
335 | ||
1f3ad14a | 336 | /* Read the resize inode */ |
ea774315 TT |
337 | pctx.ino = EXT2_RESIZE_INO; |
338 | retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode); | |
339 | if (retval) { | |
efc6f628 | 340 | if (fs->super->s_feature_compat & |
ea774315 TT |
341 | EXT2_FEATURE_COMPAT_RESIZE_INODE) |
342 | ctx->flags |= E2F_FLAG_RESIZE_INODE; | |
343 | return; | |
344 | } | |
345 | ||
efc6f628 TT |
346 | /* |
347 | * If the resize inode feature isn't set, check to make sure | |
ea774315 TT |
348 | * the resize inode is cleared; then we're done. |
349 | */ | |
efc6f628 | 350 | if (!(fs->super->s_feature_compat & |
ea774315 | 351 | EXT2_FEATURE_COMPAT_RESIZE_INODE)) { |
c3ffaf83 TT |
352 | for (i=0; i < EXT2_N_BLOCKS; i++) { |
353 | if (inode.i_block[i]) | |
354 | break; | |
355 | } | |
356 | if ((i < EXT2_N_BLOCKS) && | |
357 | fix_problem(ctx, PR_0_CLEAR_RESIZE_INODE, &pctx)) { | |
358 | memset(&inode, 0, sizeof(inode)); | |
359 | e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode, | |
360 | "clear_resize"); | |
361 | } | |
362 | return; | |
363 | } | |
ea774315 | 364 | |
efc6f628 | 365 | /* |
c3ffaf83 TT |
366 | * The resize inode feature is enabled; check to make sure the |
367 | * only block in use is the double indirect block | |
368 | */ | |
369 | blk = inode.i_block[EXT2_DIND_BLOCK]; | |
370 | for (i=0; i < EXT2_N_BLOCKS; i++) { | |
371 | if (i != EXT2_DIND_BLOCK && inode.i_block[i]) | |
372 | break; | |
373 | } | |
d4dc0a9e TT |
374 | if ((i < EXT2_N_BLOCKS) || !blk || !inode.i_links_count || |
375 | !(inode.i_mode & LINUX_S_IFREG) || | |
c3ffaf83 TT |
376 | (blk < fs->super->s_first_data_block || |
377 | blk >= fs->super->s_blocks_count)) { | |
378 | resize_inode_invalid: | |
379 | if (fix_problem(ctx, PR_0_RESIZE_INODE_INVALID, &pctx)) { | |
380 | memset(&inode, 0, sizeof(inode)); | |
381 | e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode, | |
382 | "clear_resize"); | |
383 | ctx->flags |= E2F_FLAG_RESIZE_INODE; | |
384 | } | |
385 | if (!(ctx->options & E2F_OPT_READONLY)) { | |
386 | fs->super->s_state &= ~EXT2_VALID_FS; | |
387 | ext2fs_mark_super_dirty(fs); | |
388 | } | |
389 | goto cleanup; | |
390 | } | |
391 | dind_buf = (__u32 *) e2fsck_allocate_memory(ctx, fs->blocksize * 2, | |
392 | "resize dind buffer"); | |
393 | ind_buf = (__u32 *) ((char *) dind_buf + fs->blocksize); | |
394 | ||
dc8ce346 | 395 | retval = ext2fs_read_ind_block(fs, blk, dind_buf); |
c3ffaf83 TT |
396 | if (retval) |
397 | goto resize_inode_invalid; | |
398 | ||
399 | gdt_off = fs->desc_blocks; | |
400 | pblk = fs->super->s_first_data_block + 1 + fs->desc_blocks; | |
efc6f628 | 401 | for (i = 0; i < fs->super->s_reserved_gdt_blocks / 4; |
c3ffaf83 TT |
402 | i++, gdt_off++, pblk++) { |
403 | gdt_off %= fs->blocksize/4; | |
404 | if (dind_buf[gdt_off] != pblk) | |
405 | goto resize_inode_invalid; | |
dc8ce346 | 406 | retval = ext2fs_read_ind_block(fs, pblk, ind_buf); |
efc6f628 | 407 | if (retval) |
c3ffaf83 TT |
408 | goto resize_inode_invalid; |
409 | ind_off = 0; | |
410 | for (j = 1; j < fs->group_desc_count; j++) { | |
411 | if (!ext2fs_bg_has_super(fs, j)) | |
412 | continue; | |
413 | expect = pblk + (j * fs->super->s_blocks_per_group); | |
414 | if (ind_buf[ind_off] != expect) | |
415 | goto resize_inode_invalid; | |
416 | ind_off++; | |
417 | } | |
418 | } | |
419 | ||
420 | cleanup: | |
421 | if (dind_buf) | |
422 | ext2fs_free_mem(&dind_buf); | |
423 | ||
424 | } | |
80bfaa3e | 425 | |
f77704e4 TT |
426 | /* |
427 | * This function checks the dirhash signed/unsigned hint if necessary. | |
428 | */ | |
642935c0 | 429 | static void e2fsck_fix_dirhash_hint(e2fsck_t ctx) |
f77704e4 TT |
430 | { |
431 | struct ext2_super_block *sb = ctx->fs->super; | |
432 | struct problem_context pctx; | |
f77704e4 TT |
433 | char c; |
434 | ||
435 | if ((ctx->options & E2F_OPT_READONLY) || | |
436 | !(sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) || | |
437 | (sb->s_flags & (EXT2_FLAGS_SIGNED_HASH|EXT2_FLAGS_UNSIGNED_HASH))) | |
438 | return; | |
439 | ||
440 | c = (char) 255; | |
441 | ||
442 | clear_problem_context(&pctx); | |
443 | if (fix_problem(ctx, PR_0_DIRHASH_HINT, &pctx)) { | |
444 | if (((int) c) == -1) { | |
445 | sb->s_flags |= EXT2_FLAGS_SIGNED_HASH; | |
446 | } else { | |
447 | sb->s_flags |= EXT2_FLAGS_UNSIGNED_HASH; | |
448 | } | |
449 | ext2fs_mark_super_dirty(ctx->fs); | |
450 | } | |
451 | } | |
452 | ||
453 | ||
1b6bf175 TT |
454 | void check_super_block(e2fsck_t ctx) |
455 | { | |
456 | ext2_filsys fs = ctx->fs; | |
457 | blk_t first_block, last_block; | |
5dd8f963 | 458 | struct ext2_super_block *sb = fs->super; |
550a4afa | 459 | struct ext2_group_desc *gd; |
26ea4899 | 460 | problem_t problem; |
1b6bf175 | 461 | blk_t blocks_per_group = fs->super->s_blocks_per_group; |
b21bf267 | 462 | blk_t bpg_max; |
78cf0547 | 463 | int inodes_per_block; |
b21bf267 | 464 | int ipg_max; |
89db86d3 | 465 | int inode_size; |
60702c26 | 466 | int buggy_init_scripts; |
7f813ba3 | 467 | dgrp_t i; |
1b6bf175 TT |
468 | blk_t should_be; |
469 | struct problem_context pctx; | |
5d38ef1d VC |
470 | blk_t free_blocks = 0; |
471 | ino_t free_inodes = 0; | |
80875db5 | 472 | int csum_flag, clear_test_fs_flag; |
b21bf267 AD |
473 | |
474 | inodes_per_block = EXT2_INODES_PER_BLOCK(fs->super); | |
475 | ipg_max = inodes_per_block * (blocks_per_group - 4); | |
476 | if (ipg_max > EXT2_MAX_INODES_PER_GROUP(sb)) | |
477 | ipg_max = EXT2_MAX_INODES_PER_GROUP(sb); | |
478 | bpg_max = 8 * EXT2_BLOCK_SIZE(sb); | |
479 | if (bpg_max > EXT2_MAX_BLOCKS_PER_GROUP(sb)) | |
480 | bpg_max = EXT2_MAX_BLOCKS_PER_GROUP(sb); | |
1b6bf175 | 481 | |
54dc7ca2 | 482 | ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx, |
f8188fff | 483 | sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap"); |
54dc7ca2 | 484 | ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx, |
f8188fff | 485 | sizeof(int) * fs->group_desc_count, "invalid_block_bitmap"); |
54dc7ca2 | 486 | ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx, |
f8188fff | 487 | sizeof(int) * fs->group_desc_count, "invalid_inode_table"); |
b21bf267 | 488 | |
1b6bf175 TT |
489 | clear_problem_context(&pctx); |
490 | ||
491 | /* | |
492 | * Verify the super block constants... | |
493 | */ | |
5dd8f963 | 494 | check_super_value(ctx, "inodes_count", sb->s_inodes_count, |
1b6bf175 | 495 | MIN_CHECK, 1, 0); |
5dd8f963 | 496 | check_super_value(ctx, "blocks_count", sb->s_blocks_count, |
1b6bf175 | 497 | MIN_CHECK, 1, 0); |
5dd8f963 TT |
498 | check_super_value(ctx, "first_data_block", sb->s_first_data_block, |
499 | MAX_CHECK, 0, sb->s_blocks_count); | |
5dd8f963 | 500 | check_super_value(ctx, "log_block_size", sb->s_log_block_size, |
31e29a12 TT |
501 | MIN_CHECK | MAX_CHECK, 0, |
502 | EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE); | |
932a489c AD |
503 | check_super_value(ctx, "log_frag_size", sb->s_log_frag_size, |
504 | MIN_CHECK | MAX_CHECK, 0, sb->s_log_block_size); | |
5dd8f963 | 505 | check_super_value(ctx, "frags_per_group", sb->s_frags_per_group, |
ef059870 | 506 | MIN_CHECK | MAX_CHECK, sb->s_blocks_per_group, |
b21bf267 | 507 | bpg_max); |
5dd8f963 | 508 | check_super_value(ctx, "blocks_per_group", sb->s_blocks_per_group, |
b21bf267 | 509 | MIN_CHECK | MAX_CHECK, 8, bpg_max); |
5dd8f963 | 510 | check_super_value(ctx, "inodes_per_group", sb->s_inodes_per_group, |
b21bf267 | 511 | MIN_CHECK | MAX_CHECK, inodes_per_block, ipg_max); |
5dd8f963 | 512 | check_super_value(ctx, "r_blocks_count", sb->s_r_blocks_count, |
22ba4c1d | 513 | MAX_CHECK, 0, sb->s_blocks_count / 2); |
efc6f628 | 514 | check_super_value(ctx, "reserved_gdt_blocks", |
c3ffaf83 TT |
515 | sb->s_reserved_gdt_blocks, MAX_CHECK, 0, |
516 | fs->blocksize/4); | |
1f790a7c TT |
517 | if (sb->s_rev_level > EXT2_GOOD_OLD_REV) |
518 | check_super_value(ctx, "first_ino", sb->s_first_ino, | |
519 | MIN_CHECK | MAX_CHECK, | |
520 | EXT2_GOOD_OLD_FIRST_INO, sb->s_inodes_count); | |
89db86d3 TT |
521 | inode_size = EXT2_INODE_SIZE(sb); |
522 | check_super_value(ctx, "inode_size", | |
523 | inode_size, MIN_CHECK | MAX_CHECK, | |
524 | EXT2_GOOD_OLD_INODE_SIZE, fs->blocksize); | |
525 | if (inode_size & (inode_size - 1)) { | |
526 | pctx.num = inode_size; | |
527 | pctx.str = "inode_size"; | |
528 | fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx); | |
529 | ctx->flags |= E2F_FLAG_ABORT; /* never get here! */ | |
530 | return; | |
531 | } | |
efc6f628 | 532 | |
d2af1bdd TT |
533 | if ((ctx->flags & E2F_FLAG_GOT_DEVSIZE) && |
534 | (ctx->num_blocks < sb->s_blocks_count)) { | |
535 | pctx.blk = sb->s_blocks_count; | |
536 | pctx.blk2 = ctx->num_blocks; | |
537 | if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) { | |
08b21301 TT |
538 | ctx->flags |= E2F_FLAG_ABORT; |
539 | return; | |
540 | } | |
1b6bf175 TT |
541 | } |
542 | ||
54434927 | 543 | if (sb->s_log_block_size != (__u32) sb->s_log_frag_size) { |
5dd8f963 TT |
544 | pctx.blk = EXT2_BLOCK_SIZE(sb); |
545 | pctx.blk2 = EXT2_FRAG_SIZE(sb); | |
1b6bf175 | 546 | fix_problem(ctx, PR_0_NO_FRAGMENTS, &pctx); |
08b21301 TT |
547 | ctx->flags |= E2F_FLAG_ABORT; |
548 | return; | |
1b6bf175 TT |
549 | } |
550 | ||
5dd8f963 | 551 | should_be = sb->s_frags_per_group >> |
efc6f628 | 552 | (sb->s_log_block_size - sb->s_log_frag_size); |
5dd8f963 TT |
553 | if (sb->s_blocks_per_group != should_be) { |
554 | pctx.blk = sb->s_blocks_per_group; | |
1b6bf175 TT |
555 | pctx.blk2 = should_be; |
556 | fix_problem(ctx, PR_0_BLOCKS_PER_GROUP, &pctx); | |
08b21301 TT |
557 | ctx->flags |= E2F_FLAG_ABORT; |
558 | return; | |
1b6bf175 TT |
559 | } |
560 | ||
5dd8f963 TT |
561 | should_be = (sb->s_log_block_size == 0) ? 1 : 0; |
562 | if (sb->s_first_data_block != should_be) { | |
563 | pctx.blk = sb->s_first_data_block; | |
1b6bf175 TT |
564 | pctx.blk2 = should_be; |
565 | fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx); | |
08b21301 TT |
566 | ctx->flags |= E2F_FLAG_ABORT; |
567 | return; | |
1b6bf175 TT |
568 | } |
569 | ||
5dd8f963 TT |
570 | should_be = sb->s_inodes_per_group * fs->group_desc_count; |
571 | if (sb->s_inodes_count != should_be) { | |
572 | pctx.ino = sb->s_inodes_count; | |
d4b0ce03 TT |
573 | pctx.ino2 = should_be; |
574 | if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) { | |
5dd8f963 | 575 | sb->s_inodes_count = should_be; |
d4b0ce03 TT |
576 | ext2fs_mark_super_dirty(fs); |
577 | } | |
578 | } | |
579 | ||
1b6bf175 TT |
580 | /* |
581 | * Verify the group descriptors.... | |
582 | */ | |
88b34b1f JS |
583 | first_block = sb->s_first_data_block; |
584 | last_block = sb->s_blocks_count-1; | |
1b6bf175 | 585 | |
49a7360b JS |
586 | csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super, |
587 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM); | |
550a4afa | 588 | for (i = 0, gd=fs->group_desc; i < fs->group_desc_count; i++, gd++) { |
1b6bf175 | 589 | pctx.group = i; |
abf23439 | 590 | |
88b34b1f JS |
591 | if (!EXT2_HAS_INCOMPAT_FEATURE(fs->super, |
592 | EXT4_FEATURE_INCOMPAT_FLEX_BG)) { | |
593 | first_block = ext2fs_group_first_block(fs, i); | |
594 | last_block = ext2fs_group_last_block(fs, i); | |
595 | } | |
bb1a46a4 | 596 | |
550a4afa | 597 | if ((gd->bg_block_bitmap < first_block) || |
bb1a46a4 | 598 | (gd->bg_block_bitmap > last_block)) { |
550a4afa | 599 | pctx.blk = gd->bg_block_bitmap; |
24bfb443 | 600 | if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx)) |
550a4afa | 601 | gd->bg_block_bitmap = 0; |
24bfb443 | 602 | } |
550a4afa | 603 | if (gd->bg_block_bitmap == 0) { |
24bfb443 TT |
604 | ctx->invalid_block_bitmap_flag[i]++; |
605 | ctx->invalid_bitmaps++; | |
1b6bf175 | 606 | } |
550a4afa | 607 | if ((gd->bg_inode_bitmap < first_block) || |
bb1a46a4 | 608 | (gd->bg_inode_bitmap > last_block)) { |
550a4afa | 609 | pctx.blk = gd->bg_inode_bitmap; |
24bfb443 | 610 | if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx)) |
550a4afa | 611 | gd->bg_inode_bitmap = 0; |
24bfb443 | 612 | } |
550a4afa | 613 | if (gd->bg_inode_bitmap == 0) { |
24bfb443 TT |
614 | ctx->invalid_inode_bitmap_flag[i]++; |
615 | ctx->invalid_bitmaps++; | |
1b6bf175 | 616 | } |
550a4afa TT |
617 | if ((gd->bg_inode_table < first_block) || |
618 | ((gd->bg_inode_table + | |
bb1a46a4 | 619 | fs->inode_blocks_per_group - 1) > last_block)) { |
550a4afa | 620 | pctx.blk = gd->bg_inode_table; |
24bfb443 | 621 | if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx)) |
550a4afa | 622 | gd->bg_inode_table = 0; |
24bfb443 | 623 | } |
550a4afa | 624 | if (gd->bg_inode_table == 0) { |
24bfb443 TT |
625 | ctx->invalid_inode_table_flag[i]++; |
626 | ctx->invalid_bitmaps++; | |
1b6bf175 | 627 | } |
550a4afa TT |
628 | free_blocks += gd->bg_free_blocks_count; |
629 | free_inodes += gd->bg_free_inodes_count; | |
550a4afa TT |
630 | |
631 | if ((gd->bg_free_blocks_count > sb->s_blocks_per_group) || | |
632 | (gd->bg_free_inodes_count > sb->s_inodes_per_group) || | |
633 | (gd->bg_used_dirs_count > sb->s_inodes_per_group)) | |
634 | ext2fs_unmark_valid(fs); | |
635 | ||
0d5439c8 | 636 | should_be = 0; |
49a7360b JS |
637 | if (!ext2fs_group_desc_csum_verify(fs, i)) { |
638 | if (fix_problem(ctx, PR_0_GDT_CSUM, &pctx)) { | |
639 | gd->bg_flags &= ~(EXT2_BG_BLOCK_UNINIT | | |
640 | EXT2_BG_INODE_UNINIT); | |
641 | gd->bg_itable_unused = 0; | |
0d5439c8 | 642 | should_be = 1; |
49a7360b JS |
643 | } |
644 | ext2fs_unmark_valid(fs); | |
645 | } | |
646 | ||
16b851cd | 647 | if (!csum_flag && |
49a7360b JS |
648 | (gd->bg_flags &(EXT2_BG_BLOCK_UNINIT|EXT2_BG_INODE_UNINIT)|| |
649 | gd->bg_itable_unused != 0)){ | |
650 | if (fix_problem(ctx, PR_0_GDT_UNINIT, &pctx)) { | |
651 | gd->bg_flags &= ~(EXT2_BG_BLOCK_UNINIT | | |
652 | EXT2_BG_INODE_UNINIT); | |
653 | gd->bg_itable_unused = 0; | |
0d5439c8 | 654 | should_be = 1; |
49a7360b JS |
655 | } |
656 | ext2fs_unmark_valid(fs); | |
657 | } | |
0d5439c8 AD |
658 | |
659 | if (i == fs->group_desc_count - 1 && | |
660 | gd->bg_flags & EXT2_BG_BLOCK_UNINIT) { | |
661 | if (fix_problem(ctx, PR_0_BB_UNINIT_LAST, &pctx)) { | |
662 | gd->bg_flags &= ~EXT2_BG_BLOCK_UNINIT; | |
663 | should_be = 1; | |
664 | } | |
665 | ext2fs_unmark_valid(fs); | |
666 | } | |
667 | ||
49a7360b JS |
668 | if (gd->bg_flags & EXT2_BG_BLOCK_UNINIT && |
669 | !(gd->bg_flags & EXT2_BG_INODE_UNINIT)) { | |
0d5439c8 | 670 | if (fix_problem(ctx, PR_0_BB_UNINIT_IB_INIT, &pctx)) { |
49a7360b | 671 | gd->bg_flags &= ~EXT2_BG_BLOCK_UNINIT; |
0d5439c8 AD |
672 | should_be = 1; |
673 | } | |
49a7360b JS |
674 | ext2fs_unmark_valid(fs); |
675 | } | |
0d5439c8 | 676 | |
49a7360b JS |
677 | if (csum_flag && |
678 | (gd->bg_itable_unused > gd->bg_free_inodes_count || | |
679 | gd->bg_itable_unused > sb->s_inodes_per_group)) { | |
680 | pctx.blk = gd->bg_itable_unused; | |
0d5439c8 | 681 | if (fix_problem(ctx, PR_0_GDT_ITABLE_UNUSED, &pctx)) { |
49a7360b | 682 | gd->bg_itable_unused = 0; |
0d5439c8 AD |
683 | should_be = 1; |
684 | } | |
49a7360b JS |
685 | ext2fs_unmark_valid(fs); |
686 | } | |
0d5439c8 AD |
687 | |
688 | if (should_be) | |
689 | ext2fs_group_desc_csum_set(fs, i); | |
1b6bf175 | 690 | } |
550a4afa TT |
691 | |
692 | /* | |
693 | * Update the global counts from the block group counts. This | |
694 | * is needed for an experimental patch which eliminates | |
695 | * locking the entire filesystem when allocating blocks or | |
696 | * inodes; if the filesystem is not unmounted cleanly, the | |
697 | * global counts may not be accurate. | |
698 | */ | |
699 | if ((free_blocks != sb->s_free_blocks_count) || | |
700 | (free_inodes != sb->s_free_inodes_count)) { | |
701 | if (ctx->options & E2F_OPT_READONLY) | |
702 | ext2fs_unmark_valid(fs); | |
703 | else { | |
704 | sb->s_free_blocks_count = free_blocks; | |
705 | sb->s_free_inodes_count = free_inodes; | |
706 | ext2fs_mark_super_dirty(fs); | |
707 | } | |
708 | } | |
efc6f628 | 709 | |
550a4afa TT |
710 | if ((sb->s_free_blocks_count > sb->s_blocks_count) || |
711 | (sb->s_free_inodes_count > sb->s_inodes_count)) | |
712 | ext2fs_unmark_valid(fs); | |
713 | ||
714 | ||
1b6bf175 TT |
715 | /* |
716 | * If we have invalid bitmaps, set the error state of the | |
717 | * filesystem. | |
718 | */ | |
719 | if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) { | |
550a4afa | 720 | sb->s_state &= ~EXT2_VALID_FS; |
1b6bf175 TT |
721 | ext2fs_mark_super_dirty(fs); |
722 | } | |
723 | ||
4ea0a110 | 724 | clear_problem_context(&pctx); |
efc6f628 | 725 | |
54be2ccc | 726 | #ifndef EXT2_SKIP_UUID |
1b6bf175 TT |
727 | /* |
728 | * If the UUID field isn't assigned, assign it. | |
729 | */ | |
5dd8f963 | 730 | if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid)) { |
1b6bf175 | 731 | if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) { |
5dd8f963 | 732 | uuid_generate(sb->s_uuid); |
1b6bf175 | 733 | ext2fs_mark_super_dirty(fs); |
299d7424 | 734 | fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
1b6bf175 TT |
735 | } |
736 | } | |
54be2ccc | 737 | #endif |
2a77a784 | 738 | |
80875db5 TT |
739 | /* |
740 | * Check to see if we should disable the test_fs flag | |
741 | */ | |
742 | profile_get_boolean(ctx->profile, "options", | |
743 | "clear_test_fs_flag", 0, 1, | |
744 | &clear_test_fs_flag); | |
745 | if (!(ctx->options & E2F_OPT_READONLY) && | |
746 | clear_test_fs_flag && | |
747 | (fs->super->s_flags & EXT2_FLAGS_TEST_FILESYS) && | |
748 | (fs_proc_check("ext4") || check_for_modules("ext4"))) { | |
749 | if (fix_problem(ctx, PR_0_CLEAR_TESTFS_FLAG, &pctx)) { | |
750 | fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS; | |
751 | ext2fs_mark_super_dirty(fs); | |
752 | fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; | |
753 | } | |
754 | } | |
755 | ||
4ea0a110 TT |
756 | /* |
757 | * For the Hurd, check to see if the filetype option is set, | |
758 | * since it doesn't support it. | |
759 | */ | |
80bfaa3e TT |
760 | if (!(ctx->options & E2F_OPT_READONLY) && |
761 | fs->super->s_creator_os == EXT2_OS_HURD && | |
4ea0a110 TT |
762 | (fs->super->s_feature_incompat & |
763 | EXT2_FEATURE_INCOMPAT_FILETYPE)) { | |
764 | if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) { | |
765 | fs->super->s_feature_incompat &= | |
766 | ~EXT2_FEATURE_INCOMPAT_FILETYPE; | |
767 | ext2fs_mark_super_dirty(fs); | |
0cfce7f7 | 768 | fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
4ea0a110 TT |
769 | } |
770 | } | |
80bfaa3e | 771 | |
7b59f1ef TT |
772 | /* |
773 | * If we have any of the compatibility flags set, we need to have a | |
774 | * revision 1 filesystem. Most kernels will not check the flags on | |
775 | * a rev 0 filesystem and we may have corruption issues because of | |
776 | * the incompatible changes to the filesystem. | |
777 | */ | |
778 | if (!(ctx->options & E2F_OPT_READONLY) && | |
779 | fs->super->s_rev_level == EXT2_GOOD_OLD_REV && | |
780 | (fs->super->s_feature_compat || | |
781 | fs->super->s_feature_ro_compat || | |
782 | fs->super->s_feature_incompat) && | |
783 | fix_problem(ctx, PR_0_FS_REV_LEVEL, &pctx)) { | |
a917d1cc | 784 | ext2fs_update_dynamic_rev(fs); |
7b59f1ef | 785 | ext2fs_mark_super_dirty(fs); |
0cfce7f7 | 786 | fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
7b59f1ef TT |
787 | } |
788 | ||
80bfaa3e TT |
789 | /* |
790 | * Clean up any orphan inodes, if present. | |
791 | */ | |
792 | if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) { | |
793 | fs->super->s_state &= ~EXT2_VALID_FS; | |
7b59f1ef | 794 | ext2fs_mark_super_dirty(fs); |
80bfaa3e TT |
795 | } |
796 | ||
60702c26 TT |
797 | /* |
798 | * Some buggy distributions (such as Ubuntu) have init scripts | |
799 | * and/or installers which fail to correctly set the system | |
800 | * clock before running e2fsck and/or formatting the | |
801 | * filesystem initially. Normally this happens because the | |
802 | * hardware clock is ticking localtime, instead of the more | |
803 | * proper and less error-prone UTC time. So while the kernel | |
804 | * is booting, the system time (which in Linux systems always | |
805 | * ticks in UTC time) is set from the hardware clock, but | |
806 | * since the hardware clock is ticking localtime, the system | |
807 | * time is incorrect. Unfortunately, some buggy distributions | |
808 | * do not correct this before running e2fsck. If this option | |
809 | * is set to a boolean value of true, we attempt to work | |
810 | * around this situation by allowing the superblock last write | |
811 | * time, last mount time, and last check time to be in the | |
812 | * future by up to 24 hours. | |
813 | */ | |
814 | profile_get_boolean(ctx->profile, "options", "buggy_init_scripts", | |
815 | 0, 0, &buggy_init_scripts); | |
816 | ctx->time_fudge = buggy_init_scripts ? 86400 : 0; | |
817 | ||
efc6f628 | 818 | /* |
8dceb924 TT |
819 | * Check to see if the superblock last mount time or last |
820 | * write time is in the future. | |
821 | */ | |
26ea4899 | 822 | if (fs->super->s_mtime > (__u32) ctx->now) { |
8dceb924 | 823 | pctx.num = fs->super->s_mtime; |
26ea4899 TT |
824 | problem = PR_0_FUTURE_SB_LAST_MOUNT; |
825 | if (fs->super->s_mtime <= (__u32) ctx->now + ctx->time_fudge) | |
826 | problem = PR_0_FUTURE_SB_LAST_MOUNT_FUDGED; | |
827 | if (fix_problem(ctx, problem, &pctx)) { | |
8dceb924 TT |
828 | fs->super->s_mtime = ctx->now; |
829 | ext2fs_mark_super_dirty(fs); | |
830 | } | |
831 | } | |
26ea4899 | 832 | if (fs->super->s_wtime > (__u32) ctx->now) { |
8dceb924 | 833 | pctx.num = fs->super->s_wtime; |
fe26a55a | 834 | problem = PR_0_FUTURE_SB_LAST_WRITE; |
26ea4899 TT |
835 | if (fs->super->s_wtime <= (__u32) ctx->now + ctx->time_fudge) |
836 | problem = PR_0_FUTURE_SB_LAST_MOUNT_FUDGED; | |
837 | if (fix_problem(ctx, problem, &pctx)) { | |
8dceb924 TT |
838 | fs->super->s_wtime = ctx->now; |
839 | ext2fs_mark_super_dirty(fs); | |
840 | } | |
841 | } | |
842 | ||
773fd8a1 TT |
843 | /* |
844 | * Move the ext3 journal file, if necessary. | |
845 | */ | |
846 | e2fsck_move_ext3_journal(ctx); | |
b1c52b26 TT |
847 | |
848 | /* | |
849 | * Fix journal hint, if necessary | |
850 | */ | |
851 | e2fsck_fix_ext3_journal_hint(ctx); | |
852 | ||
f77704e4 TT |
853 | /* |
854 | * Add dirhash hint if necessary | |
855 | */ | |
856 | e2fsck_fix_dirhash_hint(ctx); | |
857 | ||
1b6bf175 TT |
858 | return; |
859 | } | |
0c37f456 TT |
860 | |
861 | /* | |
862 | * Check to see if we should backup the master sb to the backup super | |
a8cde73a | 863 | * blocks. Returns non-zero if the sb should be backed up. |
0c37f456 | 864 | */ |
a8cde73a TT |
865 | |
866 | /* | |
867 | * A few flags are set on the fly by the kernel, but only in the | |
868 | * primary superblock. This is actually a bad thing, and we should | |
869 | * try to discourage it in the future. In particular, for the newer | |
870 | * ext4 files, especially EXT4_FEATURE_RO_COMPAT_DIR_NLINK and | |
871 | * EXT3_FEATURE_INCOMPAT_EXTENTS. So some of these may go away in the | |
d9ff474b ES |
872 | * future. EXT3_FEATURE_INCOMPAT_RECOVER may also get set when |
873 | * copying the primary superblock during online resize. | |
a8cde73a TT |
874 | * |
875 | * The kernel will set EXT2_FEATURE_COMPAT_EXT_ATTR, but | |
876 | * unfortunately, we shouldn't ignore it since if it's not set in the | |
877 | * backup, the extended attributes in the filesystem will be stripped | |
878 | * away. | |
879 | */ | |
880 | #define FEATURE_RO_COMPAT_IGNORE (EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \ | |
881 | EXT4_FEATURE_RO_COMPAT_DIR_NLINK) | |
d9ff474b ES |
882 | #define FEATURE_INCOMPAT_IGNORE (EXT3_FEATURE_INCOMPAT_EXTENTS| \ |
883 | EXT3_FEATURE_INCOMPAT_RECOVER) | |
a8cde73a | 884 | |
0c37f456 TT |
885 | int check_backup_super_block(e2fsck_t ctx) |
886 | { | |
887 | ext2_filsys fs = ctx->fs; | |
0c37f456 TT |
888 | errcode_t retval; |
889 | dgrp_t g; | |
890 | blk_t sb; | |
891 | int ret = 0; | |
982dd30c TT |
892 | char buf[SUPERBLOCK_SIZE]; |
893 | struct ext2_super_block *backup_sb; | |
0c37f456 TT |
894 | |
895 | /* | |
896 | * If we are already writing out the backup blocks, then we | |
897 | * don't need to test. Also, if the filesystem is invalid, or | |
898 | * the check was aborted or cancelled, we also don't want to | |
899 | * do the backup. If the filesystem was opened read-only then | |
900 | * we can't do the backup. | |
901 | */ | |
902 | if (((fs->flags & EXT2_FLAG_MASTER_SB_ONLY) == 0) || | |
903 | !ext2fs_test_valid(fs) || | |
904 | (fs->super->s_state & EXT2_ERROR_FS) || | |
905 | (ctx->flags & (E2F_FLAG_ABORT | E2F_FLAG_CANCEL)) || | |
906 | (ctx->options & E2F_OPT_READONLY)) | |
907 | return 0; | |
908 | ||
909 | for (g = 1; g < fs->group_desc_count; g++) { | |
910 | if (!ext2fs_bg_has_super(fs, g)) | |
911 | continue; | |
912 | ||
913 | sb = fs->super->s_first_data_block + | |
914 | (g * fs->super->s_blocks_per_group); | |
915 | ||
982dd30c TT |
916 | retval = io_channel_read_blk(fs->io, sb, -SUPERBLOCK_SIZE, |
917 | buf); | |
918 | if (retval) | |
919 | continue; | |
920 | backup_sb = (struct ext2_super_block *) buf; | |
921 | #ifdef WORDS_BIGENDIAN | |
922 | ext2fs_swap_super(backup_sb); | |
923 | #endif | |
924 | if ((backup_sb->s_magic != EXT2_SUPER_MAGIC) || | |
925 | (backup_sb->s_rev_level > EXT2_LIB_CURRENT_REV) || | |
926 | ((backup_sb->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) > | |
927 | EXT2_MAX_BLOCK_LOG_SIZE) || | |
928 | (EXT2_INODE_SIZE(backup_sb) < EXT2_GOOD_OLD_INODE_SIZE)) | |
0c37f456 | 929 | continue; |
0c37f456 | 930 | |
a8cde73a | 931 | #define SUPER_INCOMPAT_DIFFERENT(x) \ |
982dd30c TT |
932 | ((fs->super->x & ~FEATURE_INCOMPAT_IGNORE) != \ |
933 | (backup_sb->x & ~FEATURE_INCOMPAT_IGNORE)) | |
a8cde73a | 934 | #define SUPER_RO_COMPAT_DIFFERENT(x) \ |
982dd30c TT |
935 | ((fs->super->x & ~FEATURE_RO_COMPAT_IGNORE) != \ |
936 | (backup_sb->x & ~FEATURE_RO_COMPAT_IGNORE)) | |
a8cde73a | 937 | #define SUPER_DIFFERENT(x) \ |
982dd30c | 938 | (fs->super->x != backup_sb->x) |
a8cde73a | 939 | |
0c37f456 | 940 | if (SUPER_DIFFERENT(s_feature_compat) || |
a8cde73a TT |
941 | SUPER_INCOMPAT_DIFFERENT(s_feature_incompat) || |
942 | SUPER_RO_COMPAT_DIFFERENT(s_feature_ro_compat) || | |
0c37f456 TT |
943 | SUPER_DIFFERENT(s_blocks_count) || |
944 | SUPER_DIFFERENT(s_inodes_count) || | |
982dd30c | 945 | memcmp(fs->super->s_uuid, backup_sb->s_uuid, |
0c37f456 TT |
946 | sizeof(fs->super->s_uuid))) |
947 | ret = 1; | |
0c37f456 TT |
948 | break; |
949 | } | |
950 | return ret; | |
951 | } |