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1 /*
2  * pass1.c -- pass #1 of e2fsck: sequential scan of the inode table
3  *
4  * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
5  *
6  * %Begin-Header%
7  * This file may be redistributed under the terms of the GNU Public
8  * License.
9  * %End-Header%
10  *
11  * Pass 1 of e2fsck iterates over all the inodes in the filesystems,
12  * and applies the following tests to each inode:
13  *
14  * 	- The mode field of the inode must be legal.
15  * 	- The size and block count fields of the inode are correct.
16  * 	- A data block must not be used by another inode
17  *
18  * Pass 1 also gathers the collects the following information:
19  *
20  * 	- A bitmap of which inodes are in use.		(inode_used_map)
21  * 	- A bitmap of which inodes are directories.	(inode_dir_map)
22  * 	- A bitmap of which inodes are regular files.	(inode_reg_map)
23  * 	- A bitmap of which inodes have bad fields.	(inode_bad_map)
24  * 	- A bitmap of which inodes are in bad blocks.	(inode_bb_map)
25  * 	- A bitmap of which inodes are imagic inodes.	(inode_imagic_map)
26  * 	- A bitmap of which blocks are in use.		(block_found_map)
27  * 	- A bitmap of which blocks are in use by two inodes	(block_dup_map)
28  * 	- The data blocks of the directory inodes.	(dir_map)
29  * 	- Ref counts for ea_inodes.			(ea_inode_refs)
30  *
31  * Pass 1 is designed to stash away enough information so that the
32  * other passes should not need to read in the inode information
33  * during the normal course of a filesystem check.  (Although if an
34  * inconsistency is detected, other passes may need to read in an
35  * inode to fix it.)
36  *
37  * Note that pass 1B will be invoked if there are any duplicate blocks
38  * found.
39  */
40 
41 #define _GNU_SOURCE 1 /* get strnlen() */
42 #include "config.h"
43 #include <string.h>
44 #include <time.h>
45 #ifdef HAVE_ERRNO_H
46 #include <errno.h>
47 #endif
48 
49 #include "e2fsck.h"
50 #include <ext2fs/ext2_ext_attr.h>
51 
52 #include "problem.h"
53 
54 #ifdef NO_INLINE_FUNCS
55 #define _INLINE_
56 #else
57 #define _INLINE_ inline
58 #endif
59 
60 #undef DEBUG
61 
62 struct ea_quota {
63 	blk64_t blocks;
64 	__u64 inodes;
65 };
66 
67 static int process_block(ext2_filsys fs, blk64_t	*blocknr,
68 			 e2_blkcnt_t blockcnt, blk64_t ref_blk,
69 			 int ref_offset, void *priv_data);
70 static int process_bad_block(ext2_filsys fs, blk64_t *block_nr,
71 			     e2_blkcnt_t blockcnt, blk64_t ref_blk,
72 			     int ref_offset, void *priv_data);
73 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
74 			 char *block_buf,
75 			 const struct ea_quota *ea_ibody_quota);
76 static void mark_table_blocks(e2fsck_t ctx);
77 static void alloc_bb_map(e2fsck_t ctx);
78 static void alloc_imagic_map(e2fsck_t ctx);
79 static void mark_inode_bad(e2fsck_t ctx, ino_t ino);
80 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino);
81 static void handle_fs_bad_blocks(e2fsck_t ctx);
82 static void process_inodes(e2fsck_t ctx, char *block_buf);
83 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b);
84 static errcode_t scan_callback(ext2_filsys fs, ext2_inode_scan scan,
85 				  dgrp_t group, void * priv_data);
86 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
87 				    char *block_buf, int adjust_sign);
88 /* static char *describe_illegal_block(ext2_filsys fs, blk64_t block); */
89 
90 struct process_block_struct {
91 	ext2_ino_t	ino;
92 	unsigned	is_dir:1, is_reg:1, clear:1, suppress:1,
93 				fragmented:1, compressed:1, bbcheck:1,
94 				inode_modified:1;
95 	blk64_t		num_blocks;
96 	blk64_t		max_blocks;
97 	blk64_t		last_block;
98 	e2_blkcnt_t	last_init_lblock;
99 	e2_blkcnt_t	last_db_block;
100 	int		num_illegal_blocks;
101 	blk64_t		previous_block;
102 	struct ext2_inode *inode;
103 	struct problem_context *pctx;
104 	ext2fs_block_bitmap fs_meta_blocks;
105 	e2fsck_t	ctx;
106 	blk64_t		next_lblock;
107 	struct extent_tree_info	eti;
108 };
109 
110 struct process_inode_block {
111 	ext2_ino_t ino;
112 	struct ea_quota ea_ibody_quota;
113 	struct ext2_inode_large inode;
114 };
115 
116 struct scan_callback_struct {
117 	e2fsck_t	ctx;
118 	char		*block_buf;
119 };
120 
121 /*
122  * For the inodes to process list.
123  */
124 static struct process_inode_block *inodes_to_process;
125 static int process_inode_count;
126 
127 static __u64 ext2_max_sizes[EXT2_MAX_BLOCK_LOG_SIZE -
128 			    EXT2_MIN_BLOCK_LOG_SIZE + 1];
129 
130 /*
131  * Free all memory allocated by pass1 in preparation for restarting
132  * things.
133  */
unwind_pass1(ext2_filsys fs EXT2FS_ATTR ((unused)))134 static void unwind_pass1(ext2_filsys fs EXT2FS_ATTR((unused)))
135 {
136 	ext2fs_free_mem(&inodes_to_process);
137 	inodes_to_process = 0;
138 }
139 
140 /*
141  * Check to make sure a device inode is real.  Returns 1 if the device
142  * checks out, 0 if not.
143  *
144  * Note: this routine is now also used to check FIFO's and Sockets,
145  * since they have the same requirement; the i_block fields should be
146  * zero.
147  */
e2fsck_pass1_check_device_inode(ext2_filsys fs EXT2FS_ATTR ((unused)),struct ext2_inode * inode)148 int e2fsck_pass1_check_device_inode(ext2_filsys fs EXT2FS_ATTR((unused)),
149 				    struct ext2_inode *inode)
150 {
151 	int	i;
152 
153 	/*
154 	 * If the index or extents flag is set, then this is a bogus
155 	 * device/fifo/socket
156 	 */
157 	if (inode->i_flags & (EXT2_INDEX_FL | EXT4_EXTENTS_FL))
158 		return 0;
159 
160 	/*
161 	 * We should be able to do the test below all the time, but
162 	 * because the kernel doesn't forcibly clear the device
163 	 * inode's additional i_block fields, there are some rare
164 	 * occasions when a legitimate device inode will have non-zero
165 	 * additional i_block fields.  So for now, we only complain
166 	 * when the immutable flag is set, which should never happen
167 	 * for devices.  (And that's when the problem is caused, since
168 	 * you can't set or clear immutable flags for devices.)  Once
169 	 * the kernel has been fixed we can change this...
170 	 */
171 	if (inode->i_flags & (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)) {
172 		for (i=4; i < EXT2_N_BLOCKS; i++)
173 			if (inode->i_block[i])
174 				return 0;
175 	}
176 	return 1;
177 }
178 
179 /*
180  * Check to make sure a symlink inode is real.  Returns 1 if the symlink
181  * checks out, 0 if not.
182  */
e2fsck_pass1_check_symlink(ext2_filsys fs,ext2_ino_t ino,struct ext2_inode * inode,char * buf)183 int e2fsck_pass1_check_symlink(ext2_filsys fs, ext2_ino_t ino,
184 			       struct ext2_inode *inode, char *buf)
185 {
186 	unsigned int buflen;
187 	unsigned int len;
188 
189 	if ((inode->i_size_high || inode->i_size == 0) ||
190 	    (inode->i_flags & EXT2_INDEX_FL))
191 		return 0;
192 
193 	if (inode->i_flags & EXT4_INLINE_DATA_FL) {
194 		size_t inline_size;
195 
196 		if (inode->i_flags & EXT4_EXTENTS_FL)
197 			return 0;
198 		if (ext2fs_inline_data_size(fs, ino, &inline_size))
199 			return 0;
200 		if (inode->i_size != inline_size)
201 			return 0;
202 
203 		return 1;
204 	}
205 
206 	if (ext2fs_is_fast_symlink(inode)) {
207 		if (inode->i_flags & EXT4_EXTENTS_FL)
208 			return 0;
209 		buf = (char *)inode->i_block;
210 		buflen = sizeof(inode->i_block);
211 	} else {
212 		ext2_extent_handle_t	handle;
213 		struct ext2_extent_info	info;
214 		struct ext2fs_extent	extent;
215 		blk64_t blk;
216 		int i;
217 
218 		if (inode->i_flags & EXT4_EXTENTS_FL) {
219 			if (ext2fs_extent_open2(fs, ino, inode, &handle))
220 				return 0;
221 			if (ext2fs_extent_get_info(handle, &info) ||
222 			    (info.num_entries != 1) ||
223 			    (info.max_depth != 0)) {
224 				ext2fs_extent_free(handle);
225 				return 0;
226 			}
227 			if (ext2fs_extent_get(handle, EXT2_EXTENT_ROOT,
228 					      &extent) ||
229 			    (extent.e_lblk != 0) ||
230 			    (extent.e_len != 1)) {
231 				ext2fs_extent_free(handle);
232 				return 0;
233 			}
234 			blk = extent.e_pblk;
235 			ext2fs_extent_free(handle);
236 		} else {
237 			blk = inode->i_block[0];
238 
239 			for (i = 1; i < EXT2_N_BLOCKS; i++)
240 				if (inode->i_block[i])
241 					return 0;
242 		}
243 
244 		if (blk < fs->super->s_first_data_block ||
245 		    blk >= ext2fs_blocks_count(fs->super))
246 			return 0;
247 
248 		if (io_channel_read_blk64(fs->io, blk, 1, buf))
249 			return 0;
250 
251 		buflen = fs->blocksize;
252 	}
253 
254 	if (inode->i_flags & EXT4_ENCRYPT_FL)
255 		len = ext2fs_le16_to_cpu(*(__u16 *)buf) + 2;
256 	else
257 		len = strnlen(buf, buflen);
258 
259 	if (len >= buflen)
260 		return 0;
261 
262 	if (len != inode->i_size)
263 		return 0;
264 	return 1;
265 }
266 
267 /*
268  * If the extents or inlinedata flags are set on the inode, offer to clear 'em.
269  */
270 #define BAD_SPECIAL_FLAGS (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)
check_extents_inlinedata(e2fsck_t ctx,struct problem_context * pctx)271 static void check_extents_inlinedata(e2fsck_t ctx,
272 				     struct problem_context *pctx)
273 {
274 	if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
275 		return;
276 
277 	if (!fix_problem(ctx, PR_1_SPECIAL_EXTENTS_IDATA, pctx))
278 		return;
279 
280 	pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
281 	e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
282 }
283 #undef BAD_SPECIAL_FLAGS
284 
285 /*
286  * If the immutable (or append-only) flag is set on the inode, offer
287  * to clear it.
288  */
289 #define BAD_SPECIAL_FLAGS (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)
check_immutable(e2fsck_t ctx,struct problem_context * pctx)290 static void check_immutable(e2fsck_t ctx, struct problem_context *pctx)
291 {
292 	if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
293 		return;
294 
295 	if (!fix_problem(ctx, PR_1_SET_IMMUTABLE, pctx))
296 		return;
297 
298 	pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
299 	e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
300 }
301 
302 /*
303  * If device, fifo or socket, check size is zero -- if not offer to
304  * clear it
305  */
check_size(e2fsck_t ctx,struct problem_context * pctx)306 static void check_size(e2fsck_t ctx, struct problem_context *pctx)
307 {
308 	struct ext2_inode *inode = pctx->inode;
309 
310 	if (EXT2_I_SIZE(inode) == 0)
311 		return;
312 
313 	if (!fix_problem(ctx, PR_1_SET_NONZSIZE, pctx))
314 		return;
315 
316 	ext2fs_inode_size_set(ctx->fs, inode, 0);
317 	e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
318 }
319 
320 /*
321  * For a given size, calculate how many blocks would be charged towards quota.
322  */
size_to_quota_blocks(ext2_filsys fs,size_t size)323 static blk64_t size_to_quota_blocks(ext2_filsys fs, size_t size)
324 {
325 	blk64_t clusters;
326 
327 	clusters = DIV_ROUND_UP(size, fs->blocksize << fs->cluster_ratio_bits);
328 	return EXT2FS_C2B(fs, clusters);
329 }
330 
331 /*
332  * Check validity of EA inode. Return 0 if EA inode is valid, otherwise return
333  * the problem code.
334  */
check_large_ea_inode(e2fsck_t ctx,struct ext2_ext_attr_entry * entry,struct problem_context * pctx,blk64_t * quota_blocks)335 static problem_t check_large_ea_inode(e2fsck_t ctx,
336 				      struct ext2_ext_attr_entry *entry,
337 				      struct problem_context *pctx,
338 				      blk64_t *quota_blocks)
339 {
340 	struct ext2_inode inode;
341 	__u32 hash;
342 	errcode_t retval;
343 
344 	/* Check if inode is within valid range */
345 	if ((entry->e_value_inum < EXT2_FIRST_INODE(ctx->fs->super)) ||
346 	    (entry->e_value_inum > ctx->fs->super->s_inodes_count)) {
347 		pctx->num = entry->e_value_inum;
348 		return PR_1_ATTR_VALUE_EA_INODE;
349 	}
350 
351 	e2fsck_read_inode(ctx, entry->e_value_inum, &inode, "pass1");
352 
353 	retval = ext2fs_ext_attr_hash_entry2(ctx->fs, entry, NULL, &hash);
354 	if (retval) {
355 		com_err("check_large_ea_inode", retval,
356 			_("while hashing entry with e_value_inum = %u"),
357 			entry->e_value_inum);
358 		fatal_error(ctx, 0);
359 	}
360 
361 	if (hash == entry->e_hash) {
362 		*quota_blocks = size_to_quota_blocks(ctx->fs,
363 						     entry->e_value_size);
364 	} else {
365 		/* This might be an old Lustre-style ea_inode reference. */
366 		if (inode.i_mtime == pctx->ino &&
367 		    inode.i_generation == pctx->inode->i_generation) {
368 			*quota_blocks = 0;
369 		} else {
370 			/* If target inode is also missing EA_INODE flag,
371 			 * this is likely to be a bad reference.
372 			 */
373 			if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
374 				pctx->num = entry->e_value_inum;
375 				return PR_1_ATTR_VALUE_EA_INODE;
376 			} else {
377 				pctx->num = entry->e_hash;
378 				return PR_1_ATTR_HASH;
379 			}
380 		}
381 	}
382 
383 	if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
384 		pctx->num = entry->e_value_inum;
385 		if (fix_problem(ctx, PR_1_ATTR_SET_EA_INODE_FL, pctx)) {
386 			inode.i_flags |= EXT4_EA_INODE_FL;
387 			ext2fs_write_inode(ctx->fs, entry->e_value_inum,
388 					   &inode);
389 		} else {
390 			return PR_1_ATTR_NO_EA_INODE_FL;
391 		}
392 	}
393 	return 0;
394 }
395 
inc_ea_inode_refs(e2fsck_t ctx,struct problem_context * pctx,struct ext2_ext_attr_entry * first,void * end)396 static void inc_ea_inode_refs(e2fsck_t ctx, struct problem_context *pctx,
397 			      struct ext2_ext_attr_entry *first, void *end)
398 {
399 	struct ext2_ext_attr_entry *entry;
400 
401 	for (entry = first;
402 	     (void *)entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry);
403 	     entry = EXT2_EXT_ATTR_NEXT(entry)) {
404 		if (!entry->e_value_inum)
405 			continue;
406 		if (!ctx->ea_inode_refs) {
407 			pctx->errcode = ea_refcount_create(0,
408 							   &ctx->ea_inode_refs);
409 			if (pctx->errcode) {
410 				pctx->num = 4;
411 				fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
412 				ctx->flags |= E2F_FLAG_ABORT;
413 				return;
414 			}
415 		}
416 		ea_refcount_increment(ctx->ea_inode_refs, entry->e_value_inum,
417 				      0);
418 	}
419 }
420 
check_ea_in_inode(e2fsck_t ctx,struct problem_context * pctx,struct ea_quota * ea_ibody_quota)421 static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx,
422 			      struct ea_quota *ea_ibody_quota)
423 {
424 	struct ext2_super_block *sb = ctx->fs->super;
425 	struct ext2_inode_large *inode;
426 	struct ext2_ext_attr_entry *entry;
427 	char *start, *header, *end;
428 	unsigned int storage_size, remain;
429 	problem_t problem = 0;
430 	region_t region = 0;
431 
432 	ea_ibody_quota->blocks = 0;
433 	ea_ibody_quota->inodes = 0;
434 
435 	inode = (struct ext2_inode_large *) pctx->inode;
436 	storage_size = EXT2_INODE_SIZE(ctx->fs->super) - EXT2_GOOD_OLD_INODE_SIZE -
437 		inode->i_extra_isize;
438 	header = ((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
439 		 inode->i_extra_isize;
440 	end = header + storage_size;
441 	start = header + sizeof(__u32);
442 	entry = (struct ext2_ext_attr_entry *) start;
443 
444 	/* scan all entry's headers first */
445 
446 	/* take finish entry 0UL into account */
447 	remain = storage_size - sizeof(__u32);
448 
449 	region = region_create(0, storage_size);
450 	if (!region) {
451 		fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
452 		problem = 0;
453 		ctx->flags |= E2F_FLAG_ABORT;
454 		return;
455 	}
456 	if (region_allocate(region, 0, sizeof(__u32))) {
457 		problem = PR_1_INODE_EA_ALLOC_COLLISION;
458 		goto fix;
459 	}
460 
461 	while (remain >= sizeof(struct ext2_ext_attr_entry) &&
462 	       !EXT2_EXT_IS_LAST_ENTRY(entry)) {
463 		__u32 hash;
464 
465 		if (region_allocate(region, (char *)entry - (char *)header,
466 				    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
467 			problem = PR_1_INODE_EA_ALLOC_COLLISION;
468 			goto fix;
469 		}
470 
471 		/* header eats this space */
472 		remain -= sizeof(struct ext2_ext_attr_entry);
473 
474 		/* is attribute name valid? */
475 		if (EXT2_EXT_ATTR_SIZE(entry->e_name_len) > remain) {
476 			pctx->num = entry->e_name_len;
477 			problem = PR_1_ATTR_NAME_LEN;
478 			goto fix;
479 		}
480 
481 		/* attribute len eats this space */
482 		remain -= EXT2_EXT_ATTR_SIZE(entry->e_name_len);
483 
484 		if (entry->e_value_inum == 0) {
485 			/* check value size */
486 			if (entry->e_value_size > remain) {
487 				pctx->num = entry->e_value_size;
488 				problem = PR_1_ATTR_VALUE_SIZE;
489 				goto fix;
490 			}
491 
492 			if (entry->e_value_size &&
493 			    region_allocate(region,
494 					    sizeof(__u32) + entry->e_value_offs,
495 					    EXT2_EXT_ATTR_SIZE(
496 						entry->e_value_size))) {
497 				problem = PR_1_INODE_EA_ALLOC_COLLISION;
498 				goto fix;
499 			}
500 
501 			hash = ext2fs_ext_attr_hash_entry(entry,
502 							  start + entry->e_value_offs);
503 
504 			/* e_hash may be 0 in older inode's ea */
505 			if (entry->e_hash != 0 && entry->e_hash != hash) {
506 				pctx->num = entry->e_hash;
507 				problem = PR_1_ATTR_HASH;
508 				goto fix;
509 			}
510 		} else {
511 			blk64_t quota_blocks;
512 
513 			problem = check_large_ea_inode(ctx, entry, pctx,
514 						       &quota_blocks);
515 			if (problem != 0)
516 				goto fix;
517 
518 			ea_ibody_quota->blocks += quota_blocks;
519 			ea_ibody_quota->inodes++;
520 		}
521 
522 		/* If EA value is stored in external inode then it does not
523 		 * consume space here */
524 		if (entry->e_value_inum == 0)
525 			remain -= entry->e_value_size;
526 
527 		entry = EXT2_EXT_ATTR_NEXT(entry);
528 	}
529 
530 	if (region_allocate(region, (char *)entry - (char *)header,
531 			    sizeof(__u32))) {
532 		problem = PR_1_INODE_EA_ALLOC_COLLISION;
533 		goto fix;
534 	}
535 fix:
536 	if (region)
537 		region_free(region);
538 	/*
539 	 * it seems like a corruption. it's very unlikely we could repair
540 	 * EA(s) in automatic fashion -bzzz
541 	 */
542 	if (problem == 0 || !fix_problem(ctx, problem, pctx)) {
543 		inc_ea_inode_refs(ctx, pctx,
544 				  (struct ext2_ext_attr_entry *)start, end);
545 		return;
546 	}
547 
548 	/* simply remove all possible EA(s) */
549 	*((__u32 *)header) = 0UL;
550 	e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
551 				EXT2_INODE_SIZE(sb), "pass1");
552 	ea_ibody_quota->blocks = 0;
553 	ea_ibody_quota->inodes = 0;
554 }
555 
check_inode_extra_negative_epoch(__u32 xtime,__u32 extra)556 static int check_inode_extra_negative_epoch(__u32 xtime, __u32 extra) {
557 	return (xtime & (1U << 31)) != 0 &&
558 		(extra & EXT4_EPOCH_MASK) == EXT4_EPOCH_MASK;
559 }
560 
561 #define CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, xtime) \
562 	check_inode_extra_negative_epoch(inode->i_##xtime, \
563 					 inode->i_##xtime##_extra)
564 
565 /* When today's date is earlier than 2242, we assume that atimes,
566  * ctimes, crtimes, and mtimes with years in the range 2310..2378 are
567  * actually pre-1970 dates mis-encoded.
568  */
569 #define EXT4_EXTRA_NEGATIVE_DATE_CUTOFF 2 * (1LL << 32)
570 
check_inode_extra_space(e2fsck_t ctx,struct problem_context * pctx,struct ea_quota * ea_ibody_quota)571 static void check_inode_extra_space(e2fsck_t ctx, struct problem_context *pctx,
572 				    struct ea_quota *ea_ibody_quota)
573 {
574 	struct ext2_super_block *sb = ctx->fs->super;
575 	struct ext2_inode_large *inode;
576 	__u32 *eamagic;
577 	int min, max;
578 
579 	ea_ibody_quota->blocks = 0;
580 	ea_ibody_quota->inodes = 0;
581 
582 	inode = (struct ext2_inode_large *) pctx->inode;
583 	if (EXT2_INODE_SIZE(sb) == EXT2_GOOD_OLD_INODE_SIZE) {
584 		/* this isn't large inode. so, nothing to check */
585 		return;
586 	}
587 
588 #if 0
589 	printf("inode #%u, i_extra_size %d\n", pctx->ino,
590 			inode->i_extra_isize);
591 #endif
592 	/* i_extra_isize must cover i_extra_isize + i_checksum_hi at least */
593 	min = sizeof(inode->i_extra_isize) + sizeof(inode->i_checksum_hi);
594 	max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
595 	/*
596 	 * For now we will allow i_extra_isize to be 0, but really
597 	 * implementations should never allow i_extra_isize to be 0
598 	 */
599 	if (inode->i_extra_isize &&
600 	    (inode->i_extra_isize < min || inode->i_extra_isize > max ||
601 	     inode->i_extra_isize & 3)) {
602 		if (!fix_problem(ctx, PR_1_EXTRA_ISIZE, pctx))
603 			return;
604 		if (inode->i_extra_isize < min || inode->i_extra_isize > max)
605 			inode->i_extra_isize = sb->s_want_extra_isize;
606 		else
607 			inode->i_extra_isize = (inode->i_extra_isize + 3) & ~3;
608 		e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
609 					EXT2_INODE_SIZE(sb), "pass1");
610 	}
611 
612 	/* check if there is no place for an EA header */
613 	if (inode->i_extra_isize >= max - sizeof(__u32))
614 		return;
615 
616 	eamagic = (__u32 *) (((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
617 			inode->i_extra_isize);
618 	if (*eamagic == EXT2_EXT_ATTR_MAGIC) {
619 		/* it seems inode has an extended attribute(s) in body */
620 		check_ea_in_inode(ctx, pctx, ea_ibody_quota);
621 	}
622 
623 	/*
624 	 * If the inode's extended atime (ctime, crtime, mtime) is stored in
625 	 * the old, invalid format, repair it.
626 	 */
627 	if (((sizeof(time_t) <= 4) ||
628 	     (((sizeof(time_t) > 4) &&
629 	       ctx->now < EXT4_EXTRA_NEGATIVE_DATE_CUTOFF))) &&
630 	    (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime) ||
631 	     CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime) ||
632 	     CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime) ||
633 	     CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))) {
634 
635 		if (!fix_problem(ctx, PR_1_EA_TIME_OUT_OF_RANGE, pctx))
636 			return;
637 
638 		if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime))
639 			inode->i_atime_extra &= ~EXT4_EPOCH_MASK;
640 		if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime))
641 			inode->i_ctime_extra &= ~EXT4_EPOCH_MASK;
642 		if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime))
643 			inode->i_crtime_extra &= ~EXT4_EPOCH_MASK;
644 		if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))
645 			inode->i_mtime_extra &= ~EXT4_EPOCH_MASK;
646 		e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
647 					EXT2_INODE_SIZE(sb), "pass1");
648 	}
649 
650 }
651 
652 /*
653  * Check to see if the inode might really be a directory, despite i_mode
654  *
655  * This is a lot of complexity for something for which I'm not really
656  * convinced happens frequently in the wild.  If for any reason this
657  * causes any problems, take this code out.
658  * [tytso:20070331.0827EDT]
659  */
check_is_really_dir(e2fsck_t ctx,struct problem_context * pctx,char * buf)660 static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
661 				char *buf)
662 {
663 	struct ext2_inode *inode = pctx->inode;
664 	struct ext2_dir_entry 	*dirent;
665 	errcode_t		retval;
666 	blk64_t			blk;
667 	unsigned int		i, rec_len, not_device = 0;
668 	int			extent_fs;
669 	int			inlinedata_fs;
670 
671 	/*
672 	 * If the mode looks OK, we believe it.  If the first block in
673 	 * the i_block array is 0, this cannot be a directory. If the
674 	 * inode is extent-mapped, it is still the case that the latter
675 	 * cannot be 0 - the magic number in the extent header would make
676 	 * it nonzero.
677 	 */
678 	if (LINUX_S_ISDIR(inode->i_mode) || LINUX_S_ISREG(inode->i_mode) ||
679 	    LINUX_S_ISLNK(inode->i_mode) || inode->i_block[0] == 0)
680 		return;
681 
682 	/*
683 	 * Check the block numbers in the i_block array for validity:
684 	 * zero blocks are skipped (but the first one cannot be zero -
685 	 * see above), other blocks are checked against the first and
686 	 * max data blocks (from the the superblock) and against the
687 	 * block bitmap. Any invalid block found means this cannot be
688 	 * a directory.
689 	 *
690 	 * If there are non-zero blocks past the fourth entry, then
691 	 * this cannot be a device file: we remember that for the next
692 	 * check.
693 	 *
694 	 * For extent mapped files, we don't do any sanity checking:
695 	 * just try to get the phys block of logical block 0 and run
696 	 * with it.
697 	 *
698 	 * For inline data files, we just try to get the size of inline
699 	 * data.  If it's true, we will treat it as a directory.
700 	 */
701 
702 	extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
703 	inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
704 	if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL)) {
705 		size_t size;
706 		__u32 dotdot;
707 		unsigned int rec_len2;
708 		struct ext2_dir_entry de;
709 
710 		if (ext2fs_inline_data_size(ctx->fs, pctx->ino, &size))
711 			return;
712 		/*
713 		 * If the size isn't a multiple of 4, it's probably not a
714 		 * directory??
715 		 */
716 		if (size & 3)
717 			return;
718 		/*
719 		 * If the first 10 bytes don't look like a directory entry,
720 		 * it's probably not a directory.
721 		 */
722 		memcpy(&dotdot, inode->i_block, sizeof(dotdot));
723 		memcpy(&de, ((char *)inode->i_block) + EXT4_INLINE_DATA_DOTDOT_SIZE,
724 		       EXT2_DIR_REC_LEN(0));
725 		dotdot = ext2fs_le32_to_cpu(dotdot);
726 		de.inode = ext2fs_le32_to_cpu(de.inode);
727 		de.rec_len = ext2fs_le16_to_cpu(de.rec_len);
728 		ext2fs_get_rec_len(ctx->fs, &de, &rec_len2);
729 		if (dotdot >= ctx->fs->super->s_inodes_count ||
730 		    (dotdot < EXT2_FIRST_INO(ctx->fs->super) &&
731 		     dotdot != EXT2_ROOT_INO) ||
732 		    de.inode >= ctx->fs->super->s_inodes_count ||
733 		    (de.inode < EXT2_FIRST_INO(ctx->fs->super) &&
734 		     de.inode != 0) ||
735 		    rec_len2 > EXT4_MIN_INLINE_DATA_SIZE -
736 			      EXT4_INLINE_DATA_DOTDOT_SIZE)
737 			return;
738 		/* device files never have a "system.data" entry */
739 		goto isdir;
740 	} else if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) {
741 		/* extent mapped */
742 		if  (ext2fs_bmap2(ctx->fs, pctx->ino, inode, 0, 0, 0, 0,
743 				 &blk))
744 			return;
745 		/* device files are never extent mapped */
746 		not_device++;
747 	} else {
748 		for (i=0; i < EXT2_N_BLOCKS; i++) {
749 			blk = inode->i_block[i];
750 			if (!blk)
751 				continue;
752 			if (i >= 4)
753 				not_device++;
754 
755 			if (blk < ctx->fs->super->s_first_data_block ||
756 			    blk >= ext2fs_blocks_count(ctx->fs->super) ||
757 			    ext2fs_fast_test_block_bitmap2(ctx->block_found_map,
758 							   blk))
759 				return;	/* Invalid block, can't be dir */
760 		}
761 		blk = inode->i_block[0];
762 	}
763 
764 	/*
765 	 * If the mode says this is a device file and the i_links_count field
766 	 * is sane and we have not ruled it out as a device file previously,
767 	 * we declare it a device file, not a directory.
768 	 */
769 	if ((LINUX_S_ISCHR(inode->i_mode) || LINUX_S_ISBLK(inode->i_mode)) &&
770 	    (inode->i_links_count == 1) && !not_device)
771 		return;
772 
773 	/* read the first block */
774 	ehandler_operation(_("reading directory block"));
775 	retval = ext2fs_read_dir_block4(ctx->fs, blk, buf, 0, pctx->ino);
776 	ehandler_operation(0);
777 	if (retval)
778 		return;
779 
780 	dirent = (struct ext2_dir_entry *) buf;
781 	retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
782 	if (retval)
783 		return;
784 	if ((ext2fs_dirent_name_len(dirent) != 1) ||
785 	    (dirent->name[0] != '.') ||
786 	    (dirent->inode != pctx->ino) ||
787 	    (rec_len < 12) ||
788 	    (rec_len % 4) ||
789 	    (rec_len >= ctx->fs->blocksize - 12))
790 		return;
791 
792 	dirent = (struct ext2_dir_entry *) (buf + rec_len);
793 	retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
794 	if (retval)
795 		return;
796 	if ((ext2fs_dirent_name_len(dirent) != 2) ||
797 	    (dirent->name[0] != '.') ||
798 	    (dirent->name[1] != '.') ||
799 	    (rec_len < 12) ||
800 	    (rec_len % 4))
801 		return;
802 
803 isdir:
804 	if (fix_problem(ctx, PR_1_TREAT_AS_DIRECTORY, pctx)) {
805 		inode->i_mode = (inode->i_mode & 07777) | LINUX_S_IFDIR;
806 		e2fsck_write_inode_full(ctx, pctx->ino, inode,
807 					EXT2_INODE_SIZE(ctx->fs->super),
808 					"check_is_really_dir");
809 	}
810 }
811 
e2fsck_setup_icount(e2fsck_t ctx,const char * icount_name,int flags,ext2_icount_t hint,ext2_icount_t * ret)812 extern errcode_t e2fsck_setup_icount(e2fsck_t ctx, const char *icount_name,
813 				     int flags, ext2_icount_t hint,
814 				     ext2_icount_t *ret)
815 {
816 	unsigned int		threshold;
817 	unsigned int		save_type;
818 	ext2_ino_t		num_dirs;
819 	errcode_t		retval;
820 	char			*tdb_dir;
821 	int			enable;
822 
823 	*ret = 0;
824 
825 	profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0,
826 			   &tdb_dir);
827 	profile_get_uint(ctx->profile, "scratch_files",
828 			 "numdirs_threshold", 0, 0, &threshold);
829 	profile_get_boolean(ctx->profile, "scratch_files",
830 			    "icount", 0, 1, &enable);
831 
832 	retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs);
833 	if (retval)
834 		num_dirs = 1024;	/* Guess */
835 
836 	if (enable && tdb_dir && !access(tdb_dir, W_OK) &&
837 	    (!threshold || num_dirs > threshold)) {
838 		retval = ext2fs_create_icount_tdb(ctx->fs, tdb_dir,
839 						  flags, ret);
840 		if (retval == 0)
841 			return 0;
842 	}
843 	e2fsck_set_bitmap_type(ctx->fs, EXT2FS_BMAP64_RBTREE, icount_name,
844 			       &save_type);
845 	if (ctx->options & E2F_OPT_ICOUNT_FULLMAP)
846 		flags |= EXT2_ICOUNT_OPT_FULLMAP;
847 	retval = ext2fs_create_icount2(ctx->fs, flags, 0, hint, ret);
848 	ctx->fs->default_bitmap_type = save_type;
849 	return retval;
850 }
851 
recheck_bad_inode_checksum(ext2_filsys fs,ext2_ino_t ino,e2fsck_t ctx,struct problem_context * pctx)852 static errcode_t recheck_bad_inode_checksum(ext2_filsys fs, ext2_ino_t ino,
853 					    e2fsck_t ctx,
854 					    struct problem_context *pctx)
855 {
856 	errcode_t retval;
857 	struct ext2_inode_large inode;
858 
859 	/*
860 	 * Reread inode.  If we don't see checksum error, then this inode
861 	 * has been fixed elsewhere.
862 	 */
863 	ctx->stashed_ino = 0;
864 	retval = ext2fs_read_inode_full(fs, ino, (struct ext2_inode *)&inode,
865 					sizeof(inode));
866 	if (retval && retval != EXT2_ET_INODE_CSUM_INVALID)
867 		return retval;
868 	if (!retval)
869 		return 0;
870 
871 	/*
872 	 * Checksum still doesn't match.  That implies that the inode passes
873 	 * all the sanity checks, so maybe the checksum is simply corrupt.
874 	 * See if the user will go for fixing that.
875 	 */
876 	if (!fix_problem(ctx, PR_1_INODE_ONLY_CSUM_INVALID, pctx))
877 		return 0;
878 
879 	retval = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)&inode,
880 					 sizeof(inode));
881 	return retval;
882 }
883 
reserve_block_for_root_repair(e2fsck_t ctx)884 static void reserve_block_for_root_repair(e2fsck_t ctx)
885 {
886 	blk64_t		blk = 0;
887 	errcode_t	err;
888 	ext2_filsys	fs = ctx->fs;
889 
890 	ctx->root_repair_block = 0;
891 	if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO))
892 		return;
893 
894 	err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
895 	if (err)
896 		return;
897 	ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
898 	ctx->root_repair_block = blk;
899 }
900 
reserve_block_for_lnf_repair(e2fsck_t ctx)901 static void reserve_block_for_lnf_repair(e2fsck_t ctx)
902 {
903 	blk64_t		blk = 0;
904 	errcode_t	err;
905 	ext2_filsys	fs = ctx->fs;
906 	static const char name[] = "lost+found";
907 	ext2_ino_t	ino;
908 
909 	ctx->lnf_repair_block = 0;
910 	if (!ext2fs_lookup(fs, EXT2_ROOT_INO, name, sizeof(name)-1, 0, &ino))
911 		return;
912 
913 	err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
914 	if (err)
915 		return;
916 	ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
917 	ctx->lnf_repair_block = blk;
918 }
919 
get_inline_data_ea_size(ext2_filsys fs,ext2_ino_t ino,size_t * sz)920 static errcode_t get_inline_data_ea_size(ext2_filsys fs, ext2_ino_t ino,
921 					 size_t *sz)
922 {
923 	void *p;
924 	struct ext2_xattr_handle *handle;
925 	errcode_t retval;
926 
927 	retval = ext2fs_xattrs_open(fs, ino, &handle);
928 	if (retval)
929 		return retval;
930 
931 	retval = ext2fs_xattrs_read(handle);
932 	if (retval)
933 		goto err;
934 
935 	retval = ext2fs_xattr_get(handle, "system.data", &p, sz);
936 	if (retval)
937 		goto err;
938 	ext2fs_free_mem(&p);
939 err:
940 	(void) ext2fs_xattrs_close(&handle);
941 	return retval;
942 }
943 
finish_processing_inode(e2fsck_t ctx,ext2_ino_t ino,struct problem_context * pctx,int failed_csum)944 static void finish_processing_inode(e2fsck_t ctx, ext2_ino_t ino,
945 				    struct problem_context *pctx,
946 				    int failed_csum)
947 {
948 	if (!failed_csum)
949 		return;
950 
951 	/*
952 	 * If the inode failed the checksum and the user didn't
953 	 * clear the inode, test the checksum again -- if it still
954 	 * fails, ask the user if the checksum should be corrected.
955 	 */
956 	pctx->errcode = recheck_bad_inode_checksum(ctx->fs, ino, ctx, pctx);
957 	if (pctx->errcode)
958 		ctx->flags |= E2F_FLAG_ABORT;
959 }
960 #define FINISH_INODE_LOOP(ctx, ino, pctx, failed_csum) \
961 	do { \
962 		finish_processing_inode((ctx), (ino), (pctx), (failed_csum)); \
963 		if ((ctx)->flags & E2F_FLAG_ABORT) \
964 			return; \
965 	} while (0)
966 
could_be_block_map(ext2_filsys fs,struct ext2_inode * inode)967 static int could_be_block_map(ext2_filsys fs, struct ext2_inode *inode)
968 {
969 	__u32 x;
970 	int i;
971 
972 	for (i = 0; i < EXT2_N_BLOCKS; i++) {
973 		x = inode->i_block[i];
974 #ifdef WORDS_BIGENDIAN
975 		x = ext2fs_swab32(x);
976 #endif
977 		if (x >= ext2fs_blocks_count(fs->super))
978 			return 0;
979 	}
980 
981 	return 1;
982 }
983 
984 /*
985  * Figure out what to do with an inode that has both extents and inline data
986  * inode flags set.  Returns -1 if we decide to erase the inode, 0 otherwise.
987  */
fix_inline_data_extents_file(e2fsck_t ctx,ext2_ino_t ino,struct ext2_inode * inode,int inode_size,struct problem_context * pctx)988 static int fix_inline_data_extents_file(e2fsck_t ctx,
989 					ext2_ino_t ino,
990 					struct ext2_inode *inode,
991 					int inode_size,
992 					struct problem_context *pctx)
993 {
994 	size_t max_inline_ea_size;
995 	ext2_filsys fs = ctx->fs;
996 	int dirty = 0;
997 
998 	/* Both feature flags not set?  Just run the regular checks */
999 	if (!ext2fs_has_feature_extents(fs->super) &&
1000 	    !ext2fs_has_feature_inline_data(fs->super))
1001 		return 0;
1002 
1003 	/* Clear both flags if it's a special file */
1004 	if (LINUX_S_ISCHR(inode->i_mode) ||
1005 	    LINUX_S_ISBLK(inode->i_mode) ||
1006 	    LINUX_S_ISFIFO(inode->i_mode) ||
1007 	    LINUX_S_ISSOCK(inode->i_mode)) {
1008 		check_extents_inlinedata(ctx, pctx);
1009 		return 0;
1010 	}
1011 
1012 	/* If it looks like an extent tree, try to clear inlinedata */
1013 	if (ext2fs_extent_header_verify(inode->i_block,
1014 				 sizeof(inode->i_block)) == 0 &&
1015 	    fix_problem(ctx, PR_1_CLEAR_INLINE_DATA_FOR_EXTENT, pctx)) {
1016 		inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1017 		dirty = 1;
1018 		goto out;
1019 	}
1020 
1021 	/* If it looks short enough to be inline data, try to clear extents */
1022 	if (inode_size > EXT2_GOOD_OLD_INODE_SIZE)
1023 		max_inline_ea_size = inode_size -
1024 				     (EXT2_GOOD_OLD_INODE_SIZE +
1025 				      ((struct ext2_inode_large *)inode)->i_extra_isize);
1026 	else
1027 		max_inline_ea_size = 0;
1028 	if (EXT2_I_SIZE(inode) <
1029 	    EXT4_MIN_INLINE_DATA_SIZE + max_inline_ea_size &&
1030 	    fix_problem(ctx, PR_1_CLEAR_EXTENT_FOR_INLINE_DATA, pctx)) {
1031 		inode->i_flags &= ~EXT4_EXTENTS_FL;
1032 		dirty = 1;
1033 		goto out;
1034 	}
1035 
1036 	/*
1037 	 * Too big for inline data, but no evidence of extent tree -
1038 	 * maybe it's a block map file?  If the mappings all look valid?
1039 	 */
1040 	if (could_be_block_map(fs, inode) &&
1041 	    fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_FLAGS, pctx)) {
1042 #ifdef WORDS_BIGENDIAN
1043 		int i;
1044 
1045 		for (i = 0; i < EXT2_N_BLOCKS; i++)
1046 			inode->i_block[i] = ext2fs_swab32(inode->i_block[i]);
1047 #endif
1048 
1049 		inode->i_flags &= ~(EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL);
1050 		dirty = 1;
1051 		goto out;
1052 	}
1053 
1054 	/* Oh well, just clear the busted inode. */
1055 	if (fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_INODE, pctx)) {
1056 		e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1057 		return -1;
1058 	}
1059 
1060 out:
1061 	if (dirty)
1062 		e2fsck_write_inode(ctx, ino, inode, "pass1");
1063 
1064 	return 0;
1065 }
1066 
pass1_readahead(e2fsck_t ctx,dgrp_t * group,ext2_ino_t * next_ino)1067 static void pass1_readahead(e2fsck_t ctx, dgrp_t *group, ext2_ino_t *next_ino)
1068 {
1069 	ext2_ino_t inodes_in_group = 0, inodes_per_block, inodes_per_buffer;
1070 	dgrp_t start = *group, grp;
1071 	blk64_t blocks_to_read = 0;
1072 	errcode_t err = EXT2_ET_INVALID_ARGUMENT;
1073 
1074 	if (ctx->readahead_kb == 0)
1075 		goto out;
1076 
1077 	/* Keep iterating groups until we have enough to readahead */
1078 	inodes_per_block = EXT2_INODES_PER_BLOCK(ctx->fs->super);
1079 	for (grp = start; grp < ctx->fs->group_desc_count; grp++) {
1080 		if (ext2fs_bg_flags_test(ctx->fs, grp, EXT2_BG_INODE_UNINIT))
1081 			continue;
1082 		inodes_in_group = ctx->fs->super->s_inodes_per_group -
1083 					ext2fs_bg_itable_unused(ctx->fs, grp);
1084 		blocks_to_read += (inodes_in_group + inodes_per_block - 1) /
1085 					inodes_per_block;
1086 		if (blocks_to_read * ctx->fs->blocksize >
1087 		    ctx->readahead_kb * 1024)
1088 			break;
1089 	}
1090 
1091 	err = e2fsck_readahead(ctx->fs, E2FSCK_READA_ITABLE, start,
1092 			       grp - start + 1);
1093 	if (err == EAGAIN) {
1094 		ctx->readahead_kb /= 2;
1095 		err = 0;
1096 	}
1097 
1098 out:
1099 	if (err) {
1100 		/* Error; disable itable readahead */
1101 		*group = ctx->fs->group_desc_count;
1102 		*next_ino = ctx->fs->super->s_inodes_count;
1103 	} else {
1104 		/*
1105 		 * Don't do more readahead until we've reached the first inode
1106 		 * of the last inode scan buffer block for the last group.
1107 		 */
1108 		*group = grp + 1;
1109 		inodes_per_buffer = (ctx->inode_buffer_blocks ?
1110 				     ctx->inode_buffer_blocks :
1111 				     EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS) *
1112 				    ctx->fs->blocksize /
1113 				    EXT2_INODE_SIZE(ctx->fs->super);
1114 		inodes_in_group--;
1115 		*next_ino = inodes_in_group -
1116 			    (inodes_in_group % inodes_per_buffer) + 1 +
1117 			    (grp * ctx->fs->super->s_inodes_per_group);
1118 	}
1119 }
1120 
1121 /*
1122  * Check if the passed ino is one of the used superblock quota inodes.
1123  *
1124  * Before the quota inodes were journaled, older superblock quota inodes
1125  * were just regular files in the filesystem and not reserved inodes.  This
1126  * checks if the passed ino is one of the s_*_quota_inum superblock fields,
1127  * which may not always be the same as the EXT4_*_QUOTA_INO fields.
1128  */
quota_inum_is_super(struct ext2_super_block * sb,ext2_ino_t ino)1129 static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
1130 {
1131 	enum quota_type qtype;
1132 
1133 	for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1134 		if (*quota_sb_inump(sb, qtype) == ino)
1135 			return 1;
1136 
1137 	return 0;
1138 }
1139 
1140 /*
1141  * Check if the passed ino is one of the reserved quota inodes.
1142  * This checks if the inode number is one of the reserved EXT4_*_QUOTA_INO
1143  * inodes.  These inodes may or may not be in use by the quota feature.
1144  */
quota_inum_is_reserved(ext2_filsys fs,ext2_ino_t ino)1145 static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
1146 {
1147 	enum quota_type qtype;
1148 
1149 	for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1150 		if (quota_type2inum(qtype, fs->super) == ino)
1151 			return 1;
1152 
1153 	return 0;
1154 }
1155 
e2fsck_pass1(e2fsck_t ctx)1156 void e2fsck_pass1(e2fsck_t ctx)
1157 {
1158 	int	i;
1159 	__u64	max_sizes;
1160 	ext2_filsys fs = ctx->fs;
1161 	ext2_ino_t	ino = 0;
1162 	struct ext2_inode *inode = NULL;
1163 	ext2_inode_scan	scan = NULL;
1164 	char		*block_buf = NULL;
1165 #ifdef RESOURCE_TRACK
1166 	struct resource_track	rtrack;
1167 #endif
1168 	unsigned char	frag, fsize;
1169 	struct		problem_context pctx;
1170 	struct		scan_callback_struct scan_struct;
1171 	struct ext2_super_block *sb = ctx->fs->super;
1172 	const char	*old_op;
1173 	int		imagic_fs, extent_fs, inlinedata_fs;
1174 	int		low_dtime_check = 1;
1175 	unsigned int	inode_size = EXT2_INODE_SIZE(fs->super);
1176 	unsigned int	bufsize;
1177 	int		failed_csum = 0;
1178 	ext2_ino_t	ino_threshold = 0;
1179 	dgrp_t		ra_group = 0;
1180 	struct ea_quota	ea_ibody_quota;
1181 
1182 	init_resource_track(&rtrack, ctx->fs->io);
1183 	clear_problem_context(&pctx);
1184 
1185 	/* If we can do readahead, figure out how many groups to pull in. */
1186 	if (!e2fsck_can_readahead(ctx->fs))
1187 		ctx->readahead_kb = 0;
1188 	else if (ctx->readahead_kb == ~0ULL)
1189 		ctx->readahead_kb = e2fsck_guess_readahead(ctx->fs);
1190 	pass1_readahead(ctx, &ra_group, &ino_threshold);
1191 
1192 	if (!(ctx->options & E2F_OPT_PREEN))
1193 		fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1194 
1195 	if (ext2fs_has_feature_dir_index(fs->super) &&
1196 	    !(ctx->options & E2F_OPT_NO)) {
1197 		if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50))
1198 			ctx->dirs_to_hash = 0;
1199 	}
1200 
1201 #ifdef MTRACE
1202 	mtrace_print("Pass 1");
1203 #endif
1204 
1205 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
1206 
1207 	for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
1208 		max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
1209 		max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
1210 		max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
1211 		max_sizes = (max_sizes * (1UL << i));
1212 		ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
1213 	}
1214 #undef EXT2_BPP
1215 
1216 	imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1217 	extent_fs = ext2fs_has_feature_extents(sb);
1218 	inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1219 
1220 	/*
1221 	 * Allocate bitmaps structures
1222 	 */
1223 	pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1224 						    EXT2FS_BMAP64_RBTREE,
1225 						    "inode_used_map",
1226 						    &ctx->inode_used_map);
1227 	if (pctx.errcode) {
1228 		pctx.num = 1;
1229 		fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1230 		ctx->flags |= E2F_FLAG_ABORT;
1231 		return;
1232 	}
1233 	pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1234 			_("directory inode map"),
1235 			EXT2FS_BMAP64_AUTODIR,
1236 			"inode_dir_map", &ctx->inode_dir_map);
1237 	if (pctx.errcode) {
1238 		pctx.num = 2;
1239 		fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1240 		ctx->flags |= E2F_FLAG_ABORT;
1241 		return;
1242 	}
1243 	pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1244 			_("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1245 			"inode_reg_map", &ctx->inode_reg_map);
1246 	if (pctx.errcode) {
1247 		pctx.num = 6;
1248 		fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1249 		ctx->flags |= E2F_FLAG_ABORT;
1250 		return;
1251 	}
1252 	pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1253 			_("in-use block map"), EXT2FS_BMAP64_RBTREE,
1254 			"block_found_map", &ctx->block_found_map);
1255 	if (pctx.errcode) {
1256 		pctx.num = 1;
1257 		fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1258 		ctx->flags |= E2F_FLAG_ABORT;
1259 		return;
1260 	}
1261 	pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1262 			_("metadata block map"), EXT2FS_BMAP64_RBTREE,
1263 			"block_metadata_map", &ctx->block_metadata_map);
1264 	if (pctx.errcode) {
1265 		pctx.num = 1;
1266 		fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1267 		ctx->flags |= E2F_FLAG_ABORT;
1268 		return;
1269 	}
1270 	pctx.errcode = e2fsck_setup_icount(ctx, "inode_link_info", 0, NULL,
1271 					   &ctx->inode_link_info);
1272 	if (pctx.errcode) {
1273 		fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1274 		ctx->flags |= E2F_FLAG_ABORT;
1275 		return;
1276 	}
1277 	bufsize = inode_size;
1278 	if (bufsize < sizeof(struct ext2_inode_large))
1279 		bufsize = sizeof(struct ext2_inode_large);
1280 	inode = (struct ext2_inode *)
1281 		e2fsck_allocate_memory(ctx, bufsize, "scratch inode");
1282 
1283 	inodes_to_process = (struct process_inode_block *)
1284 		e2fsck_allocate_memory(ctx,
1285 				       (ctx->process_inode_size *
1286 					sizeof(struct process_inode_block)),
1287 				       "array of inodes to process");
1288 	process_inode_count = 0;
1289 
1290 	pctx.errcode = ext2fs_init_dblist(fs, 0);
1291 	if (pctx.errcode) {
1292 		fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1293 		ctx->flags |= E2F_FLAG_ABORT;
1294 		goto endit;
1295 	}
1296 
1297 	/*
1298 	 * If the last orphan field is set, clear it, since the pass1
1299 	 * processing will automatically find and clear the orphans.
1300 	 * In the future, we may want to try using the last_orphan
1301 	 * linked list ourselves, but for now, we clear it so that the
1302 	 * ext3 mount code won't get confused.
1303 	 */
1304 	if (!(ctx->options & E2F_OPT_READONLY)) {
1305 		if (fs->super->s_last_orphan) {
1306 			fs->super->s_last_orphan = 0;
1307 			ext2fs_mark_super_dirty(fs);
1308 		}
1309 	}
1310 
1311 	mark_table_blocks(ctx);
1312 	pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1313 						&ctx->block_found_map);
1314 	if (pctx.errcode) {
1315 		fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1316 		ctx->flags |= E2F_FLAG_ABORT;
1317 		goto endit;
1318 	}
1319 	block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1320 						    "block interate buffer");
1321 	if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1322 		e2fsck_use_inode_shortcuts(ctx, 1);
1323 	e2fsck_intercept_block_allocations(ctx);
1324 	old_op = ehandler_operation(_("opening inode scan"));
1325 	pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1326 					      &scan);
1327 	ehandler_operation(old_op);
1328 	if (pctx.errcode) {
1329 		fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1330 		ctx->flags |= E2F_FLAG_ABORT;
1331 		goto endit;
1332 	}
1333 	ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1334 				      EXT2_SF_WARN_GARBAGE_INODES, 0);
1335 	ctx->stashed_inode = inode;
1336 	scan_struct.ctx = ctx;
1337 	scan_struct.block_buf = block_buf;
1338 	ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1339 	if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1340 					      ctx->fs->group_desc_count)))
1341 		goto endit;
1342 	if ((fs->super->s_wtime < fs->super->s_inodes_count) ||
1343 	    (fs->super->s_mtime < fs->super->s_inodes_count) ||
1344 	    (fs->super->s_mkfs_time &&
1345 	     fs->super->s_mkfs_time < fs->super->s_inodes_count))
1346 		low_dtime_check = 0;
1347 
1348 	if (ext2fs_has_feature_mmp(fs->super) &&
1349 	    fs->super->s_mmp_block > fs->super->s_first_data_block &&
1350 	    fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1351 		ext2fs_mark_block_bitmap2(ctx->block_found_map,
1352 					  fs->super->s_mmp_block);
1353 
1354 	/* Set up ctx->lost_and_found if possible */
1355 	(void) e2fsck_get_lost_and_found(ctx, 0);
1356 
1357 	while (1) {
1358 		if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1359 			if (e2fsck_mmp_update(fs))
1360 				fatal_error(ctx, 0);
1361 		}
1362 		old_op = ehandler_operation(_("getting next inode from scan"));
1363 		pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1364 							  inode, inode_size);
1365 		if (ino > ino_threshold)
1366 			pass1_readahead(ctx, &ra_group, &ino_threshold);
1367 		ehandler_operation(old_op);
1368 		if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1369 			goto endit;
1370 		if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1371 			/*
1372 			 * If badblocks says badblocks is bad, offer to clear
1373 			 * the list, update the in-core bb list, and restart
1374 			 * the inode scan.
1375 			 */
1376 			if (ino == EXT2_BAD_INO &&
1377 			    fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1378 					&pctx)) {
1379 				errcode_t err;
1380 
1381 				e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1382 				ext2fs_badblocks_list_free(ctx->fs->badblocks);
1383 				ctx->fs->badblocks = NULL;
1384 				err = ext2fs_read_bb_inode(ctx->fs,
1385 							&ctx->fs->badblocks);
1386 				if (err) {
1387 					fix_problem(ctx, PR_1_ISCAN_ERROR,
1388 						    &pctx);
1389 					ctx->flags |= E2F_FLAG_ABORT;
1390 					goto endit;
1391 				}
1392 				err = ext2fs_inode_scan_goto_blockgroup(scan,
1393 									0);
1394 				if (err) {
1395 					fix_problem(ctx, PR_1_ISCAN_ERROR,
1396 						    &pctx);
1397 					ctx->flags |= E2F_FLAG_ABORT;
1398 					goto endit;
1399 				}
1400 				continue;
1401 			}
1402 			if (!ctx->inode_bb_map)
1403 				alloc_bb_map(ctx);
1404 			ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1405 			ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1406 			continue;
1407 		}
1408 		if (pctx.errcode &&
1409 		    pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1410 		    pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1411 			fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1412 			ctx->flags |= E2F_FLAG_ABORT;
1413 			goto endit;
1414 		}
1415 		if (!ino)
1416 			break;
1417 		pctx.ino = ino;
1418 		pctx.inode = inode;
1419 		ctx->stashed_ino = ino;
1420 
1421 		/* Clear trashed inode? */
1422 		if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1423 		    inode->i_links_count > 0 &&
1424 		    fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1425 			pctx.errcode = 0;
1426 			e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1427 		}
1428 		failed_csum = pctx.errcode != 0;
1429 
1430 		/*
1431 		 * Check for inodes who might have been part of the
1432 		 * orphaned list linked list.  They should have gotten
1433 		 * dealt with by now, unless the list had somehow been
1434 		 * corrupted.
1435 		 *
1436 		 * FIXME: In the future, inodes which are still in use
1437 		 * (and which are therefore) pending truncation should
1438 		 * be handled specially.  Right now we just clear the
1439 		 * dtime field, and the normal e2fsck handling of
1440 		 * inodes where i_size and the inode blocks are
1441 		 * inconsistent is to fix i_size, instead of releasing
1442 		 * the extra blocks.  This won't catch the inodes that
1443 		 * was at the end of the orphan list, but it's better
1444 		 * than nothing.  The right answer is that there
1445 		 * shouldn't be any bugs in the orphan list handling.  :-)
1446 		 */
1447 		if (inode->i_dtime && low_dtime_check &&
1448 		    inode->i_dtime < ctx->fs->super->s_inodes_count) {
1449 			if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1450 				inode->i_dtime = inode->i_links_count ?
1451 					0 : ctx->now;
1452 				e2fsck_write_inode(ctx, ino, inode,
1453 						   "pass1");
1454 				failed_csum = 0;
1455 			}
1456 		}
1457 
1458 		if (inode->i_links_count) {
1459 			pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1460 					   ino, inode->i_links_count);
1461 			if (pctx.errcode) {
1462 				pctx.num = inode->i_links_count;
1463 				fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1464 				ctx->flags |= E2F_FLAG_ABORT;
1465 				goto endit;
1466 			}
1467 		} else if ((ino >= EXT2_FIRST_INODE(fs->super)) &&
1468 			   !quota_inum_is_reserved(fs, ino)) {
1469 			if (!inode->i_dtime && inode->i_mode) {
1470 				if (fix_problem(ctx,
1471 					    PR_1_ZERO_DTIME, &pctx)) {
1472 					inode->i_dtime = ctx->now;
1473 					e2fsck_write_inode(ctx, ino, inode,
1474 							   "pass1");
1475 					failed_csum = 0;
1476 				}
1477 			}
1478 			FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1479 			continue;
1480 		}
1481 
1482 		/* Conflicting inlinedata/extents inode flags? */
1483 		if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1484 		    (inode->i_flags & EXT4_EXTENTS_FL)) {
1485 			int res = fix_inline_data_extents_file(ctx, ino, inode,
1486 							       inode_size,
1487 							       &pctx);
1488 			if (res < 0) {
1489 				/* skip FINISH_INODE_LOOP */
1490 				continue;
1491 			}
1492 		}
1493 
1494 		/* Test for incorrect inline_data flags settings. */
1495 		if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1496 		    (ino >= EXT2_FIRST_INODE(fs->super))) {
1497 			size_t size = 0;
1498 
1499 			pctx.errcode = ext2fs_inline_data_size(fs, ino, &size);
1500 			if (!pctx.errcode && size &&
1501 			    fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1502 				ext2fs_set_feature_inline_data(sb);
1503 				ext2fs_mark_super_dirty(fs);
1504 				inlinedata_fs = 1;
1505 			} else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1506 				e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1507 				/* skip FINISH_INODE_LOOP */
1508 				continue;
1509 			}
1510 		}
1511 
1512 		/* Test for inline data flag but no attr */
1513 		if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1514 		    (ino >= EXT2_FIRST_INODE(fs->super))) {
1515 			size_t size = 0;
1516 			errcode_t err;
1517 			int flags;
1518 
1519 			flags = fs->flags;
1520 			if (failed_csum)
1521 				fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1522 			err = get_inline_data_ea_size(fs, ino, &size);
1523 			fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1524 				    (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1525 
1526 			switch (err) {
1527 			case 0:
1528 				/* Everything is awesome... */
1529 				break;
1530 			case EXT2_ET_BAD_EA_BLOCK_NUM:
1531 			case EXT2_ET_BAD_EA_HASH:
1532 			case EXT2_ET_BAD_EA_HEADER:
1533 			case EXT2_ET_EA_BAD_NAME_LEN:
1534 			case EXT2_ET_EA_BAD_VALUE_SIZE:
1535 			case EXT2_ET_EA_KEY_NOT_FOUND:
1536 			case EXT2_ET_EA_NO_SPACE:
1537 			case EXT2_ET_MISSING_EA_FEATURE:
1538 			case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1539 			case EXT2_ET_INLINE_DATA_NO_BLOCK:
1540 			case EXT2_ET_INLINE_DATA_NO_SPACE:
1541 			case EXT2_ET_NO_INLINE_DATA:
1542 			case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1543 			case EXT2_ET_EA_BAD_VALUE_OFFSET:
1544 			case EXT2_ET_EA_INODE_CORRUPTED:
1545 				/* broken EA or no system.data EA; truncate */
1546 				if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1547 						&pctx)) {
1548 					err = ext2fs_inode_size_set(fs, inode, 0);
1549 					if (err) {
1550 						pctx.errcode = err;
1551 						ctx->flags |= E2F_FLAG_ABORT;
1552 						goto endit;
1553 					}
1554 					inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1555 					memset(&inode->i_block, 0,
1556 					       sizeof(inode->i_block));
1557 					e2fsck_write_inode(ctx, ino, inode,
1558 							   "pass1");
1559 					failed_csum = 0;
1560 				}
1561 				break;
1562 			default:
1563 				/* Some other kind of non-xattr error? */
1564 				pctx.errcode = err;
1565 				ctx->flags |= E2F_FLAG_ABORT;
1566 				goto endit;
1567 			}
1568 		}
1569 
1570 		/*
1571 		 * Test for incorrect extent flag settings.
1572 		 *
1573 		 * On big-endian machines we must be careful:
1574 		 * When the inode is read, the i_block array is not swapped
1575 		 * if the extent flag is set.  Therefore if we are testing
1576 		 * for or fixing a wrongly-set flag, we must potentially
1577 		 * (un)swap before testing, or after fixing.
1578 		 */
1579 
1580 		/*
1581 		 * In this case the extents flag was set when read, so
1582 		 * extent_header_verify is ok.  If the inode is cleared,
1583 		 * no need to swap... so no extra swapping here.
1584 		 */
1585 		if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1586 		    (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1587 		     (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1588 			if ((ext2fs_extent_header_verify(inode->i_block,
1589 						 sizeof(inode->i_block)) == 0) &&
1590 			    fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1591 				ext2fs_set_feature_extents(sb);
1592 				ext2fs_mark_super_dirty(fs);
1593 				extent_fs = 1;
1594 			} else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1595 			clear_inode:
1596 				e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1597 				if (ino == EXT2_BAD_INO)
1598 					ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1599 								 ino);
1600 				/* skip FINISH_INODE_LOOP */
1601 				continue;
1602 			}
1603 		}
1604 
1605 		/*
1606 		 * For big-endian machines:
1607 		 * If the inode didn't have the extents flag set when it
1608 		 * was read, then the i_blocks array was swapped.  To test
1609 		 * as an extents header, we must swap it back first.
1610 		 * IF we then set the extents flag, the entire i_block
1611 		 * array must be un/re-swapped to make it proper extents data.
1612 		 */
1613 		if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1614 		    (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1615 		     (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1616 		    (LINUX_S_ISREG(inode->i_mode) ||
1617 		     LINUX_S_ISDIR(inode->i_mode))) {
1618 			void *ehp;
1619 #ifdef WORDS_BIGENDIAN
1620 			__u32 tmp_block[EXT2_N_BLOCKS];
1621 
1622 			for (i = 0; i < EXT2_N_BLOCKS; i++)
1623 				tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1624 			ehp = tmp_block;
1625 #else
1626 			ehp = inode->i_block;
1627 #endif
1628 			if ((ext2fs_extent_header_verify(ehp,
1629 					 sizeof(inode->i_block)) == 0) &&
1630 			    (fix_problem(ctx, PR_1_UNSET_EXTENT_FL, &pctx))) {
1631 				inode->i_flags |= EXT4_EXTENTS_FL;
1632 #ifdef WORDS_BIGENDIAN
1633 				memcpy(inode->i_block, tmp_block,
1634 				       sizeof(inode->i_block));
1635 #endif
1636 				e2fsck_write_inode(ctx, ino, inode, "pass1");
1637 				failed_csum = 0;
1638 			}
1639 		}
1640 
1641 		if (ino == EXT2_BAD_INO) {
1642 			struct process_block_struct pb;
1643 
1644 			if ((failed_csum || inode->i_mode || inode->i_uid ||
1645 			     inode->i_gid || inode->i_links_count ||
1646 			     (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1647 			     inode->i_file_acl) &&
1648 			    fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1649 				memset(inode, 0, sizeof(struct ext2_inode));
1650 				e2fsck_write_inode(ctx, ino, inode,
1651 						   "clear bad inode");
1652 				failed_csum = 0;
1653 			}
1654 
1655 			pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1656 							  &pb.fs_meta_blocks);
1657 			if (pctx.errcode) {
1658 				pctx.num = 4;
1659 				fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1660 				ctx->flags |= E2F_FLAG_ABORT;
1661 				goto endit;
1662 			}
1663 			pb.ino = EXT2_BAD_INO;
1664 			pb.num_blocks = pb.last_block = 0;
1665 			pb.last_db_block = -1;
1666 			pb.num_illegal_blocks = 0;
1667 			pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1668 			pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1669 			pb.inode = inode;
1670 			pb.pctx = &pctx;
1671 			pb.ctx = ctx;
1672 			pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1673 				     block_buf, process_bad_block, &pb);
1674 			ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1675 			if (pctx.errcode) {
1676 				fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1677 				ctx->flags |= E2F_FLAG_ABORT;
1678 				goto endit;
1679 			}
1680 			if (pb.bbcheck)
1681 				if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1682 				ctx->flags |= E2F_FLAG_ABORT;
1683 				goto endit;
1684 			}
1685 			ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1686 			clear_problem_context(&pctx);
1687 			FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1688 			continue;
1689 		} else if (ino == EXT2_ROOT_INO) {
1690 			/*
1691 			 * Make sure the root inode is a directory; if
1692 			 * not, offer to clear it.  It will be
1693 			 * regenerated in pass #3.
1694 			 */
1695 			if (!LINUX_S_ISDIR(inode->i_mode)) {
1696 				if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1697 					goto clear_inode;
1698 			}
1699 			/*
1700 			 * If dtime is set, offer to clear it.  mke2fs
1701 			 * version 0.2b created filesystems with the
1702 			 * dtime field set for the root and lost+found
1703 			 * directories.  We won't worry about
1704 			 * /lost+found, since that can be regenerated
1705 			 * easily.  But we will fix the root directory
1706 			 * as a special case.
1707 			 */
1708 			if (inode->i_dtime && inode->i_links_count) {
1709 				if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1710 					inode->i_dtime = 0;
1711 					e2fsck_write_inode(ctx, ino, inode,
1712 							   "pass1");
1713 					failed_csum = 0;
1714 				}
1715 			}
1716 		} else if (ino == EXT2_JOURNAL_INO) {
1717 			ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1718 			if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1719 				if (!LINUX_S_ISREG(inode->i_mode) &&
1720 				    fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1721 						&pctx)) {
1722 					inode->i_mode = LINUX_S_IFREG;
1723 					e2fsck_write_inode(ctx, ino, inode,
1724 							   "pass1");
1725 					failed_csum = 0;
1726 				}
1727 				check_blocks(ctx, &pctx, block_buf, NULL);
1728 				FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1729 				continue;
1730 			}
1731 			if ((inode->i_links_count ||
1732 			     inode->i_blocks || inode->i_block[0]) &&
1733 			    fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1734 					&pctx)) {
1735 				memset(inode, 0, inode_size);
1736 				ext2fs_icount_store(ctx->inode_link_info,
1737 						    ino, 0);
1738 				e2fsck_write_inode_full(ctx, ino, inode,
1739 							inode_size, "pass1");
1740 				failed_csum = 0;
1741 			}
1742 		} else if (quota_inum_is_reserved(fs, ino)) {
1743 			ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1744 			if (ext2fs_has_feature_quota(fs->super) &&
1745 			    quota_inum_is_super(fs->super, ino)) {
1746 				if (!LINUX_S_ISREG(inode->i_mode) &&
1747 				    fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1748 							&pctx)) {
1749 					inode->i_mode = LINUX_S_IFREG;
1750 					e2fsck_write_inode(ctx, ino, inode,
1751 							"pass1");
1752 					failed_csum = 0;
1753 				}
1754 				check_blocks(ctx, &pctx, block_buf, NULL);
1755 				FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1756 				continue;
1757 			}
1758 			if ((inode->i_links_count ||
1759 			     inode->i_blocks || inode->i_block[0]) &&
1760 			    fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1761 					&pctx)) {
1762 				memset(inode, 0, inode_size);
1763 				ext2fs_icount_store(ctx->inode_link_info,
1764 						    ino, 0);
1765 				e2fsck_write_inode_full(ctx, ino, inode,
1766 							inode_size, "pass1");
1767 				failed_csum = 0;
1768 			}
1769 		} else if (ino < EXT2_FIRST_INODE(fs->super)) {
1770 			problem_t problem = 0;
1771 
1772 			ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1773 			if (ino == EXT2_BOOT_LOADER_INO) {
1774 				if (LINUX_S_ISDIR(inode->i_mode))
1775 					problem = PR_1_RESERVED_BAD_MODE;
1776 			} else if (ino == EXT2_RESIZE_INO) {
1777 				if (inode->i_mode &&
1778 				    !LINUX_S_ISREG(inode->i_mode))
1779 					problem = PR_1_RESERVED_BAD_MODE;
1780 			} else {
1781 				if (inode->i_mode != 0)
1782 					problem = PR_1_RESERVED_BAD_MODE;
1783 			}
1784 			if (problem) {
1785 				if (fix_problem(ctx, problem, &pctx)) {
1786 					inode->i_mode = 0;
1787 					e2fsck_write_inode(ctx, ino, inode,
1788 							   "pass1");
1789 					failed_csum = 0;
1790 				}
1791 			}
1792 			check_blocks(ctx, &pctx, block_buf, NULL);
1793 			FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1794 			continue;
1795 		}
1796 
1797 		if (!inode->i_links_count) {
1798 			FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1799 			continue;
1800 		}
1801 		/*
1802 		 * n.b.  0.3c ext2fs code didn't clear i_links_count for
1803 		 * deleted files.  Oops.
1804 		 *
1805 		 * Since all new ext2 implementations get this right,
1806 		 * we now assume that the case of non-zero
1807 		 * i_links_count and non-zero dtime means that we
1808 		 * should keep the file, not delete it.
1809 		 *
1810 		 */
1811 		if (inode->i_dtime) {
1812 			if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
1813 				inode->i_dtime = 0;
1814 				e2fsck_write_inode(ctx, ino, inode, "pass1");
1815 				failed_csum = 0;
1816 			}
1817 		}
1818 
1819 		ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1820 		switch (fs->super->s_creator_os) {
1821 		    case EXT2_OS_HURD:
1822 			frag = inode->osd2.hurd2.h_i_frag;
1823 			fsize = inode->osd2.hurd2.h_i_fsize;
1824 			break;
1825 		    default:
1826 			frag = fsize = 0;
1827 		}
1828 
1829 		if (inode->i_faddr || frag || fsize ||
1830 		    (!ext2fs_has_feature_largedir(fs->super) &&
1831 		    (LINUX_S_ISDIR(inode->i_mode) && inode->i_size_high)))
1832 			mark_inode_bad(ctx, ino);
1833 		if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1834 		    !ext2fs_has_feature_64bit(fs->super) &&
1835 		    inode->osd2.linux2.l_i_file_acl_high != 0)
1836 			mark_inode_bad(ctx, ino);
1837 		if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1838 		    !ext2fs_has_feature_huge_file(fs->super) &&
1839 		    (inode->osd2.linux2.l_i_blocks_hi != 0))
1840 			mark_inode_bad(ctx, ino);
1841 		if (inode->i_flags & EXT2_IMAGIC_FL) {
1842 			if (imagic_fs) {
1843 				if (!ctx->inode_imagic_map)
1844 					alloc_imagic_map(ctx);
1845 				ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
1846 							 ino);
1847 			} else {
1848 				if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
1849 					inode->i_flags &= ~EXT2_IMAGIC_FL;
1850 					e2fsck_write_inode(ctx, ino,
1851 							   inode, "pass1");
1852 					failed_csum = 0;
1853 				}
1854 			}
1855 		}
1856 
1857 		check_inode_extra_space(ctx, &pctx, &ea_ibody_quota);
1858 		check_is_really_dir(ctx, &pctx, block_buf);
1859 
1860 		/*
1861 		 * ext2fs_inode_has_valid_blocks2 does not actually look
1862 		 * at i_block[] values, so not endian-sensitive here.
1863 		 */
1864 		if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
1865 		    LINUX_S_ISLNK(inode->i_mode) &&
1866 		    !ext2fs_inode_has_valid_blocks2(fs, inode) &&
1867 		    fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
1868 			inode->i_flags &= ~EXT4_EXTENTS_FL;
1869 			e2fsck_write_inode(ctx, ino, inode, "pass1");
1870 			failed_csum = 0;
1871 		}
1872 
1873 		if (LINUX_S_ISDIR(inode->i_mode)) {
1874 			ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
1875 			e2fsck_add_dir_info(ctx, ino, 0);
1876 			ctx->fs_directory_count++;
1877 			if (inode->i_flags & EXT4_ENCRYPT_FL)
1878 				add_encrypted_dir(ctx, ino);
1879 		} else if (LINUX_S_ISREG (inode->i_mode)) {
1880 			ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
1881 			ctx->fs_regular_count++;
1882 		} else if (LINUX_S_ISCHR (inode->i_mode) &&
1883 			   e2fsck_pass1_check_device_inode(fs, inode)) {
1884 			check_extents_inlinedata(ctx, &pctx);
1885 			check_immutable(ctx, &pctx);
1886 			check_size(ctx, &pctx);
1887 			ctx->fs_chardev_count++;
1888 		} else if (LINUX_S_ISBLK (inode->i_mode) &&
1889 			   e2fsck_pass1_check_device_inode(fs, inode)) {
1890 			check_extents_inlinedata(ctx, &pctx);
1891 			check_immutable(ctx, &pctx);
1892 			check_size(ctx, &pctx);
1893 			ctx->fs_blockdev_count++;
1894 		} else if (LINUX_S_ISLNK (inode->i_mode) &&
1895 			   e2fsck_pass1_check_symlink(fs, ino, inode,
1896 						      block_buf)) {
1897 			check_immutable(ctx, &pctx);
1898 			ctx->fs_symlinks_count++;
1899 			if (inode->i_flags & EXT4_INLINE_DATA_FL) {
1900 				FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1901 				continue;
1902 			} else if (ext2fs_is_fast_symlink(inode)) {
1903 				ctx->fs_fast_symlinks_count++;
1904 				check_blocks(ctx, &pctx, block_buf,
1905 					     &ea_ibody_quota);
1906 				FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1907 				continue;
1908 			}
1909 		}
1910 		else if (LINUX_S_ISFIFO (inode->i_mode) &&
1911 			 e2fsck_pass1_check_device_inode(fs, inode)) {
1912 			check_extents_inlinedata(ctx, &pctx);
1913 			check_immutable(ctx, &pctx);
1914 			check_size(ctx, &pctx);
1915 			ctx->fs_fifo_count++;
1916 		} else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
1917 			   e2fsck_pass1_check_device_inode(fs, inode)) {
1918 			check_extents_inlinedata(ctx, &pctx);
1919 			check_immutable(ctx, &pctx);
1920 			check_size(ctx, &pctx);
1921 			ctx->fs_sockets_count++;
1922 		} else
1923 			mark_inode_bad(ctx, ino);
1924 		if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1925 		    !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
1926 			if (inode->i_block[EXT2_IND_BLOCK])
1927 				ctx->fs_ind_count++;
1928 			if (inode->i_block[EXT2_DIND_BLOCK])
1929 				ctx->fs_dind_count++;
1930 			if (inode->i_block[EXT2_TIND_BLOCK])
1931 				ctx->fs_tind_count++;
1932 		}
1933 		if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1934 		    !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
1935 		    (inode->i_block[EXT2_IND_BLOCK] ||
1936 		     inode->i_block[EXT2_DIND_BLOCK] ||
1937 		     inode->i_block[EXT2_TIND_BLOCK] ||
1938 		     ext2fs_file_acl_block(fs, inode))) {
1939 			struct process_inode_block *itp;
1940 
1941 			itp = &inodes_to_process[process_inode_count];
1942 			itp->ino = ino;
1943 			itp->ea_ibody_quota = ea_ibody_quota;
1944 			if (inode_size < sizeof(struct ext2_inode_large))
1945 				memcpy(&itp->inode, inode, inode_size);
1946 			else
1947 				memcpy(&itp->inode, inode, sizeof(itp->inode));
1948 			process_inode_count++;
1949 		} else
1950 			check_blocks(ctx, &pctx, block_buf, &ea_ibody_quota);
1951 
1952 		FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1953 
1954 		if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1955 			goto endit;
1956 
1957 		if (process_inode_count >= ctx->process_inode_size) {
1958 			process_inodes(ctx, block_buf);
1959 
1960 			if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1961 				goto endit;
1962 		}
1963 	}
1964 	process_inodes(ctx, block_buf);
1965 	ext2fs_close_inode_scan(scan);
1966 	scan = NULL;
1967 
1968 	reserve_block_for_root_repair(ctx);
1969 	reserve_block_for_lnf_repair(ctx);
1970 
1971 	/*
1972 	 * If any extended attribute blocks' reference counts need to
1973 	 * be adjusted, either up (ctx->refcount_extra), or down
1974 	 * (ctx->refcount), then fix them.
1975 	 */
1976 	if (ctx->refcount) {
1977 		adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
1978 		ea_refcount_free(ctx->refcount);
1979 		ctx->refcount = 0;
1980 	}
1981 	if (ctx->refcount_extra) {
1982 		adjust_extattr_refcount(ctx, ctx->refcount_extra,
1983 					block_buf, +1);
1984 		ea_refcount_free(ctx->refcount_extra);
1985 		ctx->refcount_extra = 0;
1986 	}
1987 
1988 	if (ctx->ea_block_quota_blocks) {
1989 		ea_refcount_free(ctx->ea_block_quota_blocks);
1990 		ctx->ea_block_quota_blocks = 0;
1991 	}
1992 
1993 	if (ctx->ea_block_quota_inodes) {
1994 		ea_refcount_free(ctx->ea_block_quota_inodes);
1995 		ctx->ea_block_quota_inodes = 0;
1996 	}
1997 
1998 	if (ctx->invalid_bitmaps)
1999 		handle_fs_bad_blocks(ctx);
2000 
2001 	/* We don't need the block_ea_map any more */
2002 	if (ctx->block_ea_map) {
2003 		ext2fs_free_block_bitmap(ctx->block_ea_map);
2004 		ctx->block_ea_map = 0;
2005 	}
2006 
2007 	if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
2008 		clear_problem_context(&pctx);
2009 		pctx.errcode = ext2fs_create_resize_inode(fs);
2010 		if (pctx.errcode) {
2011 			if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
2012 					 &pctx)) {
2013 				ctx->flags |= E2F_FLAG_ABORT;
2014 				goto endit;
2015 			}
2016 			pctx.errcode = 0;
2017 		}
2018 		if (!pctx.errcode) {
2019 			e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
2020 					  "recreate inode");
2021 			inode->i_mtime = ctx->now;
2022 			e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
2023 					   "recreate inode");
2024 		}
2025 		ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
2026 	}
2027 
2028 	if (ctx->flags & E2F_FLAG_RESTART) {
2029 		/*
2030 		 * Only the master copy of the superblock and block
2031 		 * group descriptors are going to be written during a
2032 		 * restart, so set the superblock to be used to be the
2033 		 * master superblock.
2034 		 */
2035 		ctx->use_superblock = 0;
2036 		unwind_pass1(fs);
2037 		goto endit;
2038 	}
2039 
2040 	if (ctx->block_dup_map) {
2041 		if (ctx->options & E2F_OPT_PREEN) {
2042 			clear_problem_context(&pctx);
2043 			fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
2044 		}
2045 		e2fsck_pass1_dupblocks(ctx, block_buf);
2046 	}
2047 	ctx->flags |= E2F_FLAG_ALLOC_OK;
2048 	ext2fs_free_mem(&inodes_to_process);
2049 endit:
2050 	e2fsck_use_inode_shortcuts(ctx, 0);
2051 
2052 	if (scan)
2053 		ext2fs_close_inode_scan(scan);
2054 	if (block_buf)
2055 		ext2fs_free_mem(&block_buf);
2056 	if (inode)
2057 		ext2fs_free_mem(&inode);
2058 
2059 	/*
2060 	 * The l+f inode may have been cleared, so zap it now and
2061 	 * later passes will recalculate it if necessary
2062 	 */
2063 	ctx->lost_and_found = 0;
2064 
2065 	if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
2066 		print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
2067 	else
2068 		ctx->invalid_bitmaps++;
2069 }
2070 #undef FINISH_INODE_LOOP
2071 
2072 /*
2073  * When the inode_scan routines call this callback at the end of the
2074  * glock group, call process_inodes.
2075  */
scan_callback(ext2_filsys fs,ext2_inode_scan scan EXT2FS_ATTR ((unused)),dgrp_t group,void * priv_data)2076 static errcode_t scan_callback(ext2_filsys fs,
2077 			       ext2_inode_scan scan EXT2FS_ATTR((unused)),
2078 			       dgrp_t group, void * priv_data)
2079 {
2080 	struct scan_callback_struct *scan_struct;
2081 	e2fsck_t ctx;
2082 
2083 	scan_struct = (struct scan_callback_struct *) priv_data;
2084 	ctx = scan_struct->ctx;
2085 
2086 	process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf);
2087 
2088 	if (ctx->progress)
2089 		if ((ctx->progress)(ctx, 1, group+1,
2090 				    ctx->fs->group_desc_count))
2091 			return EXT2_ET_CANCEL_REQUESTED;
2092 
2093 	return 0;
2094 }
2095 
2096 /*
2097  * Process the inodes in the "inodes to process" list.
2098  */
process_inodes(e2fsck_t ctx,char * block_buf)2099 static void process_inodes(e2fsck_t ctx, char *block_buf)
2100 {
2101 	int			i;
2102 	struct ext2_inode	*old_stashed_inode;
2103 	ext2_ino_t		old_stashed_ino;
2104 	const char		*old_operation;
2105 	char			buf[80];
2106 	struct problem_context	pctx;
2107 
2108 #if 0
2109 	printf("begin process_inodes: ");
2110 #endif
2111 	if (process_inode_count == 0)
2112 		return;
2113 	old_operation = ehandler_operation(0);
2114 	old_stashed_inode = ctx->stashed_inode;
2115 	old_stashed_ino = ctx->stashed_ino;
2116 	qsort(inodes_to_process, process_inode_count,
2117 		      sizeof(struct process_inode_block), process_inode_cmp);
2118 	clear_problem_context(&pctx);
2119 	for (i=0; i < process_inode_count; i++) {
2120 		pctx.inode = ctx->stashed_inode =
2121 			(struct ext2_inode *) &inodes_to_process[i].inode;
2122 		pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
2123 
2124 #if 0
2125 		printf("%u ", pctx.ino);
2126 #endif
2127 		sprintf(buf, _("reading indirect blocks of inode %u"),
2128 			pctx.ino);
2129 		ehandler_operation(buf);
2130 		check_blocks(ctx, &pctx, block_buf,
2131 			     &inodes_to_process[i].ea_ibody_quota);
2132 		if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2133 			break;
2134 	}
2135 	ctx->stashed_inode = old_stashed_inode;
2136 	ctx->stashed_ino = old_stashed_ino;
2137 	process_inode_count = 0;
2138 #if 0
2139 	printf("end process inodes\n");
2140 #endif
2141 	ehandler_operation(old_operation);
2142 }
2143 
process_inode_cmp(const void * a,const void * b)2144 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
2145 {
2146 	const struct process_inode_block *ib_a =
2147 		(const struct process_inode_block *) a;
2148 	const struct process_inode_block *ib_b =
2149 		(const struct process_inode_block *) b;
2150 	int	ret;
2151 
2152 	ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
2153 	       ib_b->inode.i_block[EXT2_IND_BLOCK]);
2154 	if (ret == 0)
2155 		/*
2156 		 * We only call process_inodes() for non-extent
2157 		 * inodes, so it's OK to pass NULL to
2158 		 * ext2fs_file_acl_block() here.
2159 		 */
2160 		ret = ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_a->inode)) -
2161 			ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_b->inode));
2162 	if (ret == 0)
2163 		ret = ib_a->ino - ib_b->ino;
2164 	return ret;
2165 }
2166 
2167 /*
2168  * Mark an inode as being bad in some what
2169  */
mark_inode_bad(e2fsck_t ctx,ino_t ino)2170 static void mark_inode_bad(e2fsck_t ctx, ino_t ino)
2171 {
2172 	struct		problem_context pctx;
2173 
2174 	if (!ctx->inode_bad_map) {
2175 		clear_problem_context(&pctx);
2176 
2177 		pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2178 				_("bad inode map"), EXT2FS_BMAP64_RBTREE,
2179 				"inode_bad_map", &ctx->inode_bad_map);
2180 		if (pctx.errcode) {
2181 			pctx.num = 3;
2182 			fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2183 			/* Should never get here */
2184 			ctx->flags |= E2F_FLAG_ABORT;
2185 			return;
2186 		}
2187 	}
2188 	ext2fs_mark_inode_bitmap2(ctx->inode_bad_map, ino);
2189 }
2190 
add_encrypted_dir(e2fsck_t ctx,ino_t ino)2191 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino)
2192 {
2193 	struct		problem_context pctx;
2194 
2195 	if (!ctx->encrypted_dirs) {
2196 		pctx.errcode = ext2fs_u32_list_create(&ctx->encrypted_dirs, 0);
2197 		if (pctx.errcode)
2198 			goto error;
2199 	}
2200 	pctx.errcode = ext2fs_u32_list_add(ctx->encrypted_dirs, ino);
2201 	if (pctx.errcode == 0)
2202 		return;
2203 error:
2204 	fix_problem(ctx, PR_1_ALLOCATE_ENCRYPTED_DIRLIST, &pctx);
2205 	/* Should never get here */
2206 	ctx->flags |= E2F_FLAG_ABORT;
2207 }
2208 
2209 /*
2210  * This procedure will allocate the inode "bb" (badblock) map table
2211  */
alloc_bb_map(e2fsck_t ctx)2212 static void alloc_bb_map(e2fsck_t ctx)
2213 {
2214 	struct		problem_context pctx;
2215 
2216 	clear_problem_context(&pctx);
2217 	pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2218 			_("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2219 			"inode_bb_map", &ctx->inode_bb_map);
2220 	if (pctx.errcode) {
2221 		pctx.num = 4;
2222 		fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2223 		/* Should never get here */
2224 		ctx->flags |= E2F_FLAG_ABORT;
2225 		return;
2226 	}
2227 }
2228 
2229 /*
2230  * This procedure will allocate the inode imagic table
2231  */
alloc_imagic_map(e2fsck_t ctx)2232 static void alloc_imagic_map(e2fsck_t ctx)
2233 {
2234 	struct		problem_context pctx;
2235 
2236 	clear_problem_context(&pctx);
2237 	pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2238 			_("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2239 			"inode_imagic_map", &ctx->inode_imagic_map);
2240 	if (pctx.errcode) {
2241 		pctx.num = 5;
2242 		fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2243 		/* Should never get here */
2244 		ctx->flags |= E2F_FLAG_ABORT;
2245 		return;
2246 	}
2247 }
2248 
2249 /*
2250  * Marks a block as in use, setting the dup_map if it's been set
2251  * already.  Called by process_block and process_bad_block.
2252  *
2253  * WARNING: Assumes checks have already been done to make sure block
2254  * is valid.  This is true in both process_block and process_bad_block.
2255  */
mark_block_used(e2fsck_t ctx,blk64_t block)2256 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2257 {
2258 	struct		problem_context pctx;
2259 
2260 	clear_problem_context(&pctx);
2261 
2262 	if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2263 		if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2264 		    !(ctx->options & E2F_OPT_UNSHARE_BLOCKS)) {
2265 			return;
2266 		}
2267 		if (!ctx->block_dup_map) {
2268 			pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2269 					_("multiply claimed block map"),
2270 					EXT2FS_BMAP64_RBTREE, "block_dup_map",
2271 					&ctx->block_dup_map);
2272 			if (pctx.errcode) {
2273 				pctx.num = 3;
2274 				fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2275 					    &pctx);
2276 				/* Should never get here */
2277 				ctx->flags |= E2F_FLAG_ABORT;
2278 				return;
2279 			}
2280 		}
2281 		ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2282 	} else {
2283 		ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
2284 	}
2285 }
2286 
2287 /*
2288  * When cluster size is greater than one block, it is caller's responsibility
2289  * to make sure block parameter starts at a cluster boundary.
2290  */
mark_blocks_used(e2fsck_t ctx,blk64_t block,unsigned int num)2291 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
2292 				      unsigned int num)
2293 {
2294 	if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
2295 		ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
2296 	else {
2297 		unsigned int i;
2298 
2299 		for (i = 0; i < num; i += EXT2FS_CLUSTER_RATIO(ctx->fs))
2300 			mark_block_used(ctx, block + i);
2301 	}
2302 }
2303 
2304 /*
2305  * Adjust the extended attribute block's reference counts at the end
2306  * of pass 1, either by subtracting out references for EA blocks that
2307  * are still referenced in ctx->refcount, or by adding references for
2308  * EA blocks that had extra references as accounted for in
2309  * ctx->refcount_extra.
2310  */
adjust_extattr_refcount(e2fsck_t ctx,ext2_refcount_t refcount,char * block_buf,int adjust_sign)2311 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
2312 				    char *block_buf, int adjust_sign)
2313 {
2314 	struct ext2_ext_attr_header 	*header;
2315 	struct problem_context		pctx;
2316 	ext2_filsys			fs = ctx->fs;
2317 	blk64_t				blk;
2318 	__u32				should_be;
2319 	ea_value_t			count;
2320 
2321 	clear_problem_context(&pctx);
2322 
2323 	ea_refcount_intr_begin(refcount);
2324 	while (1) {
2325 		if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
2326 			break;
2327 		pctx.blk = blk;
2328 		pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
2329 						     pctx.ino);
2330 		if (pctx.errcode) {
2331 			fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2332 			return;
2333 		}
2334 		header = (struct ext2_ext_attr_header *) block_buf;
2335 		pctx.blkcount = header->h_refcount;
2336 		should_be = header->h_refcount + adjust_sign * (int)count;
2337 		pctx.num = should_be;
2338 		if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
2339 			header->h_refcount = should_be;
2340 			pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
2341 							     block_buf,
2342 							     pctx.ino);
2343 			if (pctx.errcode) {
2344 				fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
2345 					    &pctx);
2346 				continue;
2347 			}
2348 		}
2349 	}
2350 }
2351 
2352 /*
2353  * Handle processing the extended attribute blocks
2354  */
check_ext_attr(e2fsck_t ctx,struct problem_context * pctx,char * block_buf,struct ea_quota * ea_block_quota)2355 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
2356 			   char *block_buf, struct ea_quota *ea_block_quota)
2357 {
2358 	ext2_filsys fs = ctx->fs;
2359 	ext2_ino_t	ino = pctx->ino;
2360 	struct ext2_inode *inode = pctx->inode;
2361 	blk64_t		blk;
2362 	char *		end;
2363 	struct ext2_ext_attr_header *header;
2364 	struct ext2_ext_attr_entry *first, *entry;
2365 	blk64_t		quota_blocks = EXT2FS_C2B(fs, 1);
2366 	__u64		quota_inodes = 0;
2367 	region_t	region = 0;
2368 	int		failed_csum = 0;
2369 
2370 	ea_block_quota->blocks = 0;
2371 	ea_block_quota->inodes = 0;
2372 
2373 	blk = ext2fs_file_acl_block(fs, inode);
2374 	if (blk == 0)
2375 		return 0;
2376 
2377 	/*
2378 	 * If the Extended attribute flag isn't set, then a non-zero
2379 	 * file acl means that the inode is corrupted.
2380 	 *
2381 	 * Or if the extended attribute block is an invalid block,
2382 	 * then the inode is also corrupted.
2383 	 */
2384 	if (!ext2fs_has_feature_xattr(fs->super) ||
2385 	    (blk < fs->super->s_first_data_block) ||
2386 	    (blk >= ext2fs_blocks_count(fs->super))) {
2387 		mark_inode_bad(ctx, ino);
2388 		return 0;
2389 	}
2390 
2391 	/* If ea bitmap hasn't been allocated, create it */
2392 	if (!ctx->block_ea_map) {
2393 		pctx->errcode = e2fsck_allocate_block_bitmap(fs,
2394 					_("ext attr block map"),
2395 					EXT2FS_BMAP64_RBTREE, "block_ea_map",
2396 					&ctx->block_ea_map);
2397 		if (pctx->errcode) {
2398 			pctx->num = 2;
2399 			fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
2400 			ctx->flags |= E2F_FLAG_ABORT;
2401 			return 0;
2402 		}
2403 	}
2404 
2405 	/* Create the EA refcount structure if necessary */
2406 	if (!ctx->refcount) {
2407 		pctx->errcode = ea_refcount_create(0, &ctx->refcount);
2408 		if (pctx->errcode) {
2409 			pctx->num = 1;
2410 			fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2411 			ctx->flags |= E2F_FLAG_ABORT;
2412 			return 0;
2413 		}
2414 	}
2415 
2416 #if 0
2417 	/* Debugging text */
2418 	printf("Inode %u has EA block %u\n", ino, blk);
2419 #endif
2420 
2421 	/* Have we seen this EA block before? */
2422 	if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
2423 		ea_block_quota->blocks = EXT2FS_C2B(fs, 1);
2424 		ea_block_quota->inodes = 0;
2425 
2426 		if (ctx->ea_block_quota_blocks) {
2427 			ea_refcount_fetch(ctx->ea_block_quota_blocks, blk,
2428 					  &quota_blocks);
2429 			if (quota_blocks)
2430 				ea_block_quota->blocks = quota_blocks;
2431 		}
2432 
2433 		if (ctx->ea_block_quota_inodes)
2434 			ea_refcount_fetch(ctx->ea_block_quota_inodes, blk,
2435 					  &ea_block_quota->inodes);
2436 
2437 		if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
2438 			return 1;
2439 		/* Ooops, this EA was referenced more than it stated */
2440 		if (!ctx->refcount_extra) {
2441 			pctx->errcode = ea_refcount_create(0,
2442 					   &ctx->refcount_extra);
2443 			if (pctx->errcode) {
2444 				pctx->num = 2;
2445 				fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2446 				ctx->flags |= E2F_FLAG_ABORT;
2447 				return 0;
2448 			}
2449 		}
2450 		ea_refcount_increment(ctx->refcount_extra, blk, 0);
2451 		return 1;
2452 	}
2453 
2454 	/*
2455 	 * OK, we haven't seen this EA block yet.  So we need to
2456 	 * validate it
2457 	 */
2458 	pctx->blk = blk;
2459 	pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
2460 	if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
2461 		pctx->errcode = 0;
2462 		failed_csum = 1;
2463 	} else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
2464 		pctx->errcode = 0;
2465 
2466 	if (pctx->errcode &&
2467 	    fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
2468 		pctx->errcode = 0;
2469 		goto clear_extattr;
2470 	}
2471 	header = (struct ext2_ext_attr_header *) block_buf;
2472 	pctx->blk = ext2fs_file_acl_block(fs, inode);
2473 	if (((ctx->ext_attr_ver == 1) &&
2474 	     (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
2475 	    ((ctx->ext_attr_ver == 2) &&
2476 	     (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
2477 		if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
2478 			goto clear_extattr;
2479 	}
2480 
2481 	if (header->h_blocks != 1) {
2482 		if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
2483 			goto clear_extattr;
2484 	}
2485 
2486 	if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
2487 		goto clear_extattr;
2488 
2489 	region = region_create(0, fs->blocksize);
2490 	if (!region) {
2491 		fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
2492 		ctx->flags |= E2F_FLAG_ABORT;
2493 		return 0;
2494 	}
2495 	if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
2496 		if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2497 			goto clear_extattr;
2498 	}
2499 
2500 	first = (struct ext2_ext_attr_entry *)(header+1);
2501 	end = block_buf + fs->blocksize;
2502 	entry = first;
2503 	while ((char *)entry < end && *(__u32 *)entry) {
2504 		__u32 hash;
2505 
2506 		if (region_allocate(region, (char *)entry - (char *)header,
2507 			           EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
2508 			if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2509 				goto clear_extattr;
2510 			break;
2511 		}
2512 		if ((ctx->ext_attr_ver == 1 &&
2513 		     (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
2514 		    (ctx->ext_attr_ver == 2 &&
2515 		     entry->e_name_index == 0)) {
2516 			if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
2517 				goto clear_extattr;
2518 			break;
2519 		}
2520 		if (entry->e_value_inum == 0) {
2521 			if (entry->e_value_offs + entry->e_value_size >
2522 			    fs->blocksize) {
2523 				if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2524 					goto clear_extattr;
2525 				break;
2526 			}
2527 			if (entry->e_value_size &&
2528 			    region_allocate(region, entry->e_value_offs,
2529 					    EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
2530 				if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION,
2531 						pctx))
2532 					goto clear_extattr;
2533 			}
2534 
2535 			hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
2536 							  entry->e_value_offs);
2537 
2538 			if (entry->e_hash != hash) {
2539 				pctx->num = entry->e_hash;
2540 				if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
2541 					goto clear_extattr;
2542 				entry->e_hash = hash;
2543 			}
2544 		} else {
2545 			problem_t problem;
2546 			blk64_t entry_quota_blocks;
2547 
2548 			problem = check_large_ea_inode(ctx, entry, pctx,
2549 						       &entry_quota_blocks);
2550 			if (problem && fix_problem(ctx, problem, pctx))
2551 				goto clear_extattr;
2552 
2553 			quota_blocks += entry_quota_blocks;
2554 			quota_inodes++;
2555 		}
2556 
2557 		entry = EXT2_EXT_ATTR_NEXT(entry);
2558 	}
2559 	if (region_allocate(region, (char *)entry - (char *)header, 4)) {
2560 		if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2561 			goto clear_extattr;
2562 	}
2563 	region_free(region);
2564 
2565 	/*
2566 	 * We only get here if there was no other errors that were fixed.
2567 	 * If there was a checksum fail, ask to correct it.
2568 	 */
2569 	if (failed_csum &&
2570 	    fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
2571 		pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
2572 						       pctx->ino);
2573 		if (pctx->errcode)
2574 			return 0;
2575 	}
2576 
2577 	if (quota_blocks != EXT2FS_C2B(fs, 1U)) {
2578 		if (!ctx->ea_block_quota_blocks) {
2579 			pctx->errcode = ea_refcount_create(0,
2580 						&ctx->ea_block_quota_blocks);
2581 			if (pctx->errcode) {
2582 				pctx->num = 3;
2583 				goto refcount_fail;
2584 			}
2585 		}
2586 		ea_refcount_store(ctx->ea_block_quota_blocks, blk,
2587 				  quota_blocks);
2588 	}
2589 
2590 	if (quota_inodes) {
2591 		if (!ctx->ea_block_quota_inodes) {
2592 			pctx->errcode = ea_refcount_create(0,
2593 						&ctx->ea_block_quota_inodes);
2594 			if (pctx->errcode) {
2595 				pctx->num = 4;
2596 refcount_fail:
2597 				fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2598 				ctx->flags |= E2F_FLAG_ABORT;
2599 				return 0;
2600 			}
2601 		}
2602 
2603 		ea_refcount_store(ctx->ea_block_quota_inodes, blk,
2604 				  quota_inodes);
2605 	}
2606 	ea_block_quota->blocks = quota_blocks;
2607 	ea_block_quota->inodes = quota_inodes;
2608 
2609 	inc_ea_inode_refs(ctx, pctx, first, end);
2610 	ea_refcount_store(ctx->refcount, blk, header->h_refcount - 1);
2611 	mark_block_used(ctx, blk);
2612 	ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
2613 	return 1;
2614 
2615 clear_extattr:
2616 	if (region)
2617 		region_free(region);
2618 	ext2fs_file_acl_block_set(fs, inode, 0);
2619 	e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
2620 	return 0;
2621 }
2622 
2623 /* Returns 1 if bad htree, 0 if OK */
handle_htree(e2fsck_t ctx,struct problem_context * pctx,ext2_ino_t ino,struct ext2_inode * inode,char * block_buf)2624 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
2625 			ext2_ino_t ino, struct ext2_inode *inode,
2626 			char *block_buf)
2627 {
2628 	struct ext2_dx_root_info	*root;
2629 	ext2_filsys			fs = ctx->fs;
2630 	errcode_t			retval;
2631 	blk64_t				blk;
2632 
2633 	if ((!LINUX_S_ISDIR(inode->i_mode) &&
2634 	     fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
2635 	    (!ext2fs_has_feature_dir_index(fs->super) &&
2636 	     fix_problem(ctx, PR_1_HTREE_SET, pctx)))
2637 		return 1;
2638 
2639 	pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
2640 
2641 	if ((pctx->errcode) ||
2642 	    (blk == 0) ||
2643 	    (blk < fs->super->s_first_data_block) ||
2644 	    (blk >= ext2fs_blocks_count(fs->super))) {
2645 		if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2646 			return 1;
2647 		else
2648 			return 0;
2649 	}
2650 
2651 	retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
2652 	if (retval && fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2653 		return 1;
2654 
2655 	/* XXX should check that beginning matches a directory */
2656 	root = (struct ext2_dx_root_info *) (block_buf + 24);
2657 
2658 	if ((root->reserved_zero || root->info_length < 8) &&
2659 	    fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2660 		return 1;
2661 
2662 	pctx->num = root->hash_version;
2663 	if ((root->hash_version != EXT2_HASH_LEGACY) &&
2664 	    (root->hash_version != EXT2_HASH_HALF_MD4) &&
2665 	    (root->hash_version != EXT2_HASH_TEA) &&
2666 	    fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
2667 		return 1;
2668 
2669 	if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
2670 	    fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
2671 		return 1;
2672 
2673 	pctx->num = root->indirect_levels;
2674 	if ((root->indirect_levels > ext2_dir_htree_level(fs)) &&
2675 	    fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2676 		return 1;
2677 
2678 	return 0;
2679 }
2680 
e2fsck_clear_inode(e2fsck_t ctx,ext2_ino_t ino,struct ext2_inode * inode,int restart_flag,const char * source)2681 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
2682 			struct ext2_inode *inode, int restart_flag,
2683 			const char *source)
2684 {
2685 	inode->i_flags = 0;
2686 	inode->i_links_count = 0;
2687 	ext2fs_icount_store(ctx->inode_link_info, ino, 0);
2688 	inode->i_dtime = ctx->now;
2689 
2690 	/*
2691 	 * If a special inode has such rotten block mappings that we
2692 	 * want to clear the whole inode, be sure to actually zap
2693 	 * the block maps because i_links_count isn't checked for
2694 	 * special inodes, and we'll end up right back here the next
2695 	 * time we run fsck.
2696 	 */
2697 	if (ino < EXT2_FIRST_INODE(ctx->fs->super))
2698 		memset(inode->i_block, 0, sizeof(inode->i_block));
2699 
2700 	ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
2701 	ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
2702 	if (ctx->inode_reg_map)
2703 		ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
2704 	if (ctx->inode_bad_map)
2705 		ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
2706 
2707 	/*
2708 	 * If the inode was partially accounted for before processing
2709 	 * was aborted, we need to restart the pass 1 scan.
2710 	 */
2711 	ctx->flags |= restart_flag;
2712 
2713 	if (ino == EXT2_BAD_INO)
2714 		memset(inode, 0, sizeof(struct ext2_inode));
2715 
2716 	e2fsck_write_inode(ctx, ino, inode, source);
2717 }
2718 
2719 /*
2720  * Use the multiple-blocks reclamation code to fix alignment problems in
2721  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
2722  * physical cluster, and we want the block offsets within that cluster to
2723  * line up.
2724  */
has_unaligned_cluster_map(e2fsck_t ctx,blk64_t last_pblk,blk64_t last_lblk,blk64_t pblk,blk64_t lblk)2725 static int has_unaligned_cluster_map(e2fsck_t ctx,
2726 				     blk64_t last_pblk, blk64_t last_lblk,
2727 				     blk64_t pblk, blk64_t lblk)
2728 {
2729 	blk64_t cluster_mask;
2730 
2731 	if (!ctx->fs->cluster_ratio_bits)
2732 		return 0;
2733 	cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
2734 
2735 	/*
2736 	 * If the block in the logical cluster doesn't align with the block in
2737 	 * the physical cluster...
2738 	 */
2739 	if ((lblk & cluster_mask) != (pblk & cluster_mask))
2740 		return 1;
2741 
2742 	/*
2743 	 * If we cross a physical cluster boundary within a logical cluster...
2744 	 */
2745 	if (last_pblk && (lblk & cluster_mask) != 0 &&
2746 	    EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
2747 	    EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
2748 		return 1;
2749 
2750 	return 0;
2751 }
2752 
scan_extent_node(e2fsck_t ctx,struct problem_context * pctx,struct process_block_struct * pb,blk64_t start_block,blk64_t end_block,blk64_t eof_block,ext2_extent_handle_t ehandle,int try_repairs)2753 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
2754 			     struct process_block_struct *pb,
2755 			     blk64_t start_block, blk64_t end_block,
2756 			     blk64_t eof_block,
2757 			     ext2_extent_handle_t ehandle,
2758 			     int try_repairs)
2759 {
2760 	struct ext2fs_extent	extent;
2761 	blk64_t			blk, last_lblk;
2762 	unsigned int		i, n;
2763 	int			is_dir, is_leaf;
2764 	problem_t		problem;
2765 	struct ext2_extent_info	info;
2766 	int			failed_csum = 0;
2767 
2768 	if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
2769 		failed_csum = 1;
2770 
2771 	pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
2772 	if (pctx->errcode)
2773 		return;
2774 	if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
2775 	    !pb->eti.force_rebuild) {
2776 		struct extent_tree_level *etl;
2777 
2778 		etl = pb->eti.ext_info + info.curr_level;
2779 		etl->num_extents += info.num_entries;
2780 		etl->max_extents += info.max_entries;
2781 		/*
2782 		 * Implementation wart: Splitting extent blocks when appending
2783 		 * will leave the old block with one free entry.  Therefore
2784 		 * unless the node is totally full, pretend that a non-root
2785 		 * extent block can hold one fewer entry than it actually does,
2786 		 * so that we don't repeatedly rebuild the extent tree.
2787 		 */
2788 		if (info.curr_level && info.num_entries < info.max_entries)
2789 			etl->max_extents--;
2790 	}
2791 
2792 	pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
2793 					  &extent);
2794 	while ((pctx->errcode == 0 ||
2795 		pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
2796 	       info.num_entries-- > 0) {
2797 		is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
2798 		is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
2799 		last_lblk = extent.e_lblk + extent.e_len - 1;
2800 
2801 		problem = 0;
2802 		pctx->blk = extent.e_pblk;
2803 		pctx->blk2 = extent.e_lblk;
2804 		pctx->num = extent.e_len;
2805 		pctx->blkcount = extent.e_lblk + extent.e_len;
2806 
2807 		if (extent.e_pblk == 0 ||
2808 		    extent.e_pblk < ctx->fs->super->s_first_data_block ||
2809 		    extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
2810 			problem = PR_1_EXTENT_BAD_START_BLK;
2811 		else if (extent.e_lblk < start_block)
2812 			problem = PR_1_OUT_OF_ORDER_EXTENTS;
2813 		else if ((end_block && last_lblk > end_block) &&
2814 			 (!(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT &&
2815 				last_lblk > eof_block)))
2816 			problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
2817 		else if (is_leaf && extent.e_len == 0)
2818 			problem = PR_1_EXTENT_LENGTH_ZERO;
2819 		else if (is_leaf &&
2820 			 (extent.e_pblk + extent.e_len) >
2821 			 ext2fs_blocks_count(ctx->fs->super))
2822 			problem = PR_1_EXTENT_ENDS_BEYOND;
2823 		else if (is_leaf && is_dir &&
2824 			 ((extent.e_lblk + extent.e_len) >
2825 			  (1U << (21 - ctx->fs->super->s_log_block_size))))
2826 			problem = PR_1_TOOBIG_DIR;
2827 
2828 		if (is_leaf && problem == 0 && extent.e_len > 0) {
2829 #if 0
2830 			printf("extent_region(ino=%u, expect=%llu, "
2831 			       "lblk=%llu, len=%u)\n",
2832 			       pb->ino, pb->next_lblock,
2833 			       extent.e_lblk, extent.e_len);
2834 #endif
2835 			if (extent.e_lblk < pb->next_lblock)
2836 				problem = PR_1_EXTENT_COLLISION;
2837 			else if (extent.e_lblk + extent.e_len > pb->next_lblock)
2838 				pb->next_lblock = extent.e_lblk + extent.e_len;
2839 		}
2840 
2841 		/*
2842 		 * Uninitialized blocks in a directory?  Clear the flag and
2843 		 * we'll interpret the blocks later.
2844 		 */
2845 		if (try_repairs && is_dir && problem == 0 &&
2846 		    (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
2847 		    fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
2848 			extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
2849 			pb->inode_modified = 1;
2850 			pctx->errcode = ext2fs_extent_replace(ehandle, 0,
2851 							      &extent);
2852 			if (pctx->errcode)
2853 				return;
2854 			failed_csum = 0;
2855 		}
2856 
2857 		if (try_repairs && problem) {
2858 report_problem:
2859 			if (fix_problem(ctx, problem, pctx)) {
2860 				if (ctx->invalid_bitmaps) {
2861 					/*
2862 					 * If fsck knows the bitmaps are bad,
2863 					 * skip to the next extent and
2864 					 * try to clear this extent again
2865 					 * after fixing the bitmaps, by
2866 					 * restarting fsck.
2867 					 */
2868 					pctx->errcode = ext2fs_extent_get(
2869 							  ehandle,
2870 							  EXT2_EXTENT_NEXT_SIB,
2871 							  &extent);
2872 					ctx->flags |= E2F_FLAG_RESTART_LATER;
2873 					if (pctx->errcode ==
2874 						    EXT2_ET_NO_CURRENT_NODE) {
2875 						pctx->errcode = 0;
2876 						break;
2877 					}
2878 					continue;
2879 				}
2880 				e2fsck_read_bitmaps(ctx);
2881 				pb->inode_modified = 1;
2882 				pctx->errcode =
2883 					ext2fs_extent_delete(ehandle, 0);
2884 				if (pctx->errcode) {
2885 					pctx->str = "ext2fs_extent_delete";
2886 					return;
2887 				}
2888 				pctx->errcode = ext2fs_extent_fix_parents(ehandle);
2889 				if (pctx->errcode &&
2890 				    pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
2891 					pctx->str = "ext2fs_extent_fix_parents";
2892 					return;
2893 				}
2894 				pctx->errcode = ext2fs_extent_get(ehandle,
2895 								  EXT2_EXTENT_CURRENT,
2896 								  &extent);
2897 				if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
2898 					pctx->errcode = 0;
2899 					break;
2900 				}
2901 				failed_csum = 0;
2902 				continue;
2903 			}
2904 			goto next;
2905 		}
2906 
2907 		if (!is_leaf) {
2908 			blk64_t lblk = extent.e_lblk;
2909 			int next_try_repairs = 1;
2910 
2911 			blk = extent.e_pblk;
2912 
2913 			/*
2914 			 * If this lower extent block collides with critical
2915 			 * metadata, don't try to repair the damage.  Pass 1b
2916 			 * will reallocate the block; then we can try again.
2917 			 */
2918 			if (pb->ino != EXT2_RESIZE_INO &&
2919 			    extent.e_pblk < ctx->fs->super->s_blocks_count &&
2920 			    ext2fs_test_block_bitmap2(ctx->block_metadata_map,
2921 						      extent.e_pblk)) {
2922 				next_try_repairs = 0;
2923 				pctx->blk = blk;
2924 				fix_problem(ctx,
2925 					    PR_1_CRITICAL_METADATA_COLLISION,
2926 					    pctx);
2927 				if ((ctx->options & E2F_OPT_NO) == 0)
2928 					ctx->flags |= E2F_FLAG_RESTART_LATER;
2929 			}
2930 			pctx->errcode = ext2fs_extent_get(ehandle,
2931 						  EXT2_EXTENT_DOWN, &extent);
2932 			if (pctx->errcode &&
2933 			    pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
2934 				pctx->str = "EXT2_EXTENT_DOWN";
2935 				problem = PR_1_EXTENT_HEADER_INVALID;
2936 				if (!next_try_repairs)
2937 					return;
2938 				if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
2939 					goto report_problem;
2940 				return;
2941 			}
2942 			/* The next extent should match this index's logical start */
2943 			if (extent.e_lblk != lblk) {
2944 				struct ext2_extent_info e_info;
2945 
2946 				ext2fs_extent_get_info(ehandle, &e_info);
2947 				pctx->blk = lblk;
2948 				pctx->blk2 = extent.e_lblk;
2949 				pctx->num = e_info.curr_level - 1;
2950 				problem = PR_1_EXTENT_INDEX_START_INVALID;
2951 				if (fix_problem(ctx, problem, pctx)) {
2952 					pb->inode_modified = 1;
2953 					pctx->errcode =
2954 						ext2fs_extent_fix_parents(ehandle);
2955 					if (pctx->errcode) {
2956 						pctx->str = "ext2fs_extent_fix_parents";
2957 						return;
2958 					}
2959 				}
2960 			}
2961 			scan_extent_node(ctx, pctx, pb, extent.e_lblk,
2962 					 last_lblk, eof_block, ehandle,
2963 					 next_try_repairs);
2964 			if (pctx->errcode)
2965 				return;
2966 			pctx->errcode = ext2fs_extent_get(ehandle,
2967 						  EXT2_EXTENT_UP, &extent);
2968 			if (pctx->errcode) {
2969 				pctx->str = "EXT2_EXTENT_UP";
2970 				return;
2971 			}
2972 			mark_block_used(ctx, blk);
2973 			pb->num_blocks++;
2974 			goto next;
2975 		}
2976 
2977 		if ((pb->previous_block != 0) &&
2978 		    (pb->previous_block+1 != extent.e_pblk)) {
2979 			if (ctx->options & E2F_OPT_FRAGCHECK) {
2980 				char type = '?';
2981 
2982 				if (pb->is_dir)
2983 					type = 'd';
2984 				else if (pb->is_reg)
2985 					type = 'f';
2986 
2987 				printf(("%6lu(%c): expecting %6lu "
2988 					"actual extent "
2989 					"phys %6lu log %lu len %lu\n"),
2990 				       (unsigned long) pctx->ino, type,
2991 				       (unsigned long) pb->previous_block+1,
2992 				       (unsigned long) extent.e_pblk,
2993 				       (unsigned long) extent.e_lblk,
2994 				       (unsigned long) extent.e_len);
2995 			}
2996 			pb->fragmented = 1;
2997 		}
2998 		/*
2999 		 * If we notice a gap in the logical block mappings of an
3000 		 * extent-mapped directory, offer to close the hole by
3001 		 * moving the logical block down, otherwise we'll go mad in
3002 		 * pass 3 allocating empty directory blocks to fill the hole.
3003 		 */
3004 		if (try_repairs && is_dir &&
3005 		    pb->last_block + 1 < extent.e_lblk) {
3006 			blk64_t new_lblk;
3007 
3008 			new_lblk = pb->last_block + 1;
3009 			if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
3010 				new_lblk = ((new_lblk +
3011 					     EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
3012 					    ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
3013 					   (extent.e_pblk &
3014 					    EXT2FS_CLUSTER_MASK(ctx->fs));
3015 			pctx->blk = extent.e_lblk;
3016 			pctx->blk2 = new_lblk;
3017 			if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
3018 				extent.e_lblk = new_lblk;
3019 				pb->inode_modified = 1;
3020 				pctx->errcode = ext2fs_extent_replace(ehandle,
3021 								0, &extent);
3022 				if (pctx->errcode) {
3023 					pctx->errcode = 0;
3024 					goto alloc_later;
3025 				}
3026 				pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3027 				if (pctx->errcode)
3028 					goto failed_add_dir_block;
3029 				pctx->errcode = ext2fs_extent_goto(ehandle,
3030 								extent.e_lblk);
3031 				if (pctx->errcode)
3032 					goto failed_add_dir_block;
3033 				last_lblk = extent.e_lblk + extent.e_len - 1;
3034 				failed_csum = 0;
3035 			}
3036 		}
3037 alloc_later:
3038 		if (is_dir) {
3039 			while (++pb->last_db_block <
3040 			       (e2_blkcnt_t) extent.e_lblk) {
3041 				pctx->errcode = ext2fs_add_dir_block2(
3042 							ctx->fs->dblist,
3043 							pb->ino, 0,
3044 							pb->last_db_block);
3045 				if (pctx->errcode) {
3046 					pctx->blk = 0;
3047 					pctx->num = pb->last_db_block;
3048 					goto failed_add_dir_block;
3049 				}
3050 			}
3051 
3052 			for (i = 0; i < extent.e_len; i++) {
3053 				pctx->errcode = ext2fs_add_dir_block2(
3054 							ctx->fs->dblist,
3055 							pctx->ino,
3056 							extent.e_pblk + i,
3057 							extent.e_lblk + i);
3058 				if (pctx->errcode) {
3059 					pctx->blk = extent.e_pblk + i;
3060 					pctx->num = extent.e_lblk + i;
3061 				failed_add_dir_block:
3062 					fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3063 					/* Should never get here */
3064 					ctx->flags |= E2F_FLAG_ABORT;
3065 					return;
3066 				}
3067 			}
3068 			if (extent.e_len > 0)
3069 				pb->last_db_block = extent.e_lblk + extent.e_len - 1;
3070 		}
3071 		if (has_unaligned_cluster_map(ctx, pb->previous_block,
3072 					      pb->last_block,
3073 					      extent.e_pblk,
3074 					      extent.e_lblk)) {
3075 			for (i = 0; i < extent.e_len; i++) {
3076 				pctx->blk = extent.e_lblk + i;
3077 				pctx->blk2 = extent.e_pblk + i;
3078 				fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3079 				mark_block_used(ctx, extent.e_pblk + i);
3080 				mark_block_used(ctx, extent.e_pblk + i);
3081 			}
3082 		}
3083 
3084 		/*
3085 		 * Check whether first cluster got marked in previous iteration.
3086 		 */
3087 		if (ctx->fs->cluster_ratio_bits &&
3088 		    pb->previous_block &&
3089 		    (EXT2FS_B2C(ctx->fs, extent.e_pblk) ==
3090 		     EXT2FS_B2C(ctx->fs, pb->previous_block)))
3091 			/* Set blk to the beginning of next cluster. */
3092 			blk = EXT2FS_C2B(
3093 				ctx->fs,
3094 				EXT2FS_B2C(ctx->fs, extent.e_pblk) + 1);
3095 		else
3096 			/* Set blk to the beginning of current cluster. */
3097 			blk = EXT2FS_C2B(ctx->fs,
3098 					 EXT2FS_B2C(ctx->fs, extent.e_pblk));
3099 
3100 		if (blk < extent.e_pblk + extent.e_len) {
3101 			mark_blocks_used(ctx, blk,
3102 					 extent.e_pblk + extent.e_len - blk);
3103 			n = DIV_ROUND_UP(extent.e_pblk + extent.e_len - blk,
3104 					 EXT2FS_CLUSTER_RATIO(ctx->fs));
3105 			pb->num_blocks += n;
3106 		}
3107 		pb->last_block = extent.e_lblk + extent.e_len - 1;
3108 		pb->previous_block = extent.e_pblk + extent.e_len - 1;
3109 		start_block = pb->last_block = last_lblk;
3110 		if (is_leaf && !is_dir &&
3111 		    !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
3112 			pb->last_init_lblock = last_lblk;
3113 	next:
3114 		pctx->errcode = ext2fs_extent_get(ehandle,
3115 						  EXT2_EXTENT_NEXT_SIB,
3116 						  &extent);
3117 	}
3118 
3119 	/* Failed csum but passes checks?  Ask to fix checksum. */
3120 	if (failed_csum &&
3121 	    fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
3122 		pb->inode_modified = 1;
3123 		pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
3124 		if (pctx->errcode)
3125 			return;
3126 	}
3127 
3128 	if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
3129 		pctx->errcode = 0;
3130 }
3131 
check_blocks_extents(e2fsck_t ctx,struct problem_context * pctx,struct process_block_struct * pb)3132 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
3133 				 struct process_block_struct *pb)
3134 {
3135 	struct ext2_extent_info info;
3136 	struct ext2_inode	*inode = pctx->inode;
3137 	ext2_extent_handle_t	ehandle;
3138 	ext2_filsys		fs = ctx->fs;
3139 	ext2_ino_t		ino = pctx->ino;
3140 	errcode_t		retval;
3141 	blk64_t                 eof_lblk;
3142 	struct ext3_extent_header	*eh;
3143 
3144 	/* Check for a proper extent header... */
3145 	eh = (struct ext3_extent_header *) &inode->i_block[0];
3146 	retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
3147 	if (retval) {
3148 		if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
3149 			e2fsck_clear_inode(ctx, ino, inode, 0,
3150 					   "check_blocks_extents");
3151 		pctx->errcode = 0;
3152 		return;
3153 	}
3154 
3155 	/* ...since this function doesn't fail if i_block is zeroed. */
3156 	pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
3157 	if (pctx->errcode) {
3158 		if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
3159 			e2fsck_clear_inode(ctx, ino, inode, 0,
3160 					   "check_blocks_extents");
3161 		pctx->errcode = 0;
3162 		return;
3163 	}
3164 
3165 	retval = ext2fs_extent_get_info(ehandle, &info);
3166 	if (retval == 0) {
3167 		int max_depth = info.max_depth;
3168 
3169 		if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
3170 			max_depth = MAX_EXTENT_DEPTH_COUNT-1;
3171 		ctx->extent_depth_count[max_depth]++;
3172 	}
3173 
3174 	/* Check maximum extent depth */
3175 	pctx->blk = info.max_depth;
3176 	pctx->blk2 = ext2fs_max_extent_depth(ehandle);
3177 	if (pctx->blk2 < pctx->blk &&
3178 	    fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
3179 		pb->eti.force_rebuild = 1;
3180 
3181 	/* Can we collect extent tree level stats? */
3182 	pctx->blk = MAX_EXTENT_DEPTH_COUNT;
3183 	if (pctx->blk2 > pctx->blk)
3184 		fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
3185 	memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
3186 	pb->eti.ino = pb->ino;
3187 
3188 	pb->next_lblock = 0;
3189 
3190 	eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
3191 		EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
3192 	scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
3193 	if (pctx->errcode &&
3194 	    fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
3195 		pb->num_blocks = 0;
3196 		inode->i_blocks = 0;
3197 		e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3198 				   "check_blocks_extents");
3199 		pctx->errcode = 0;
3200 	}
3201 	ext2fs_extent_free(ehandle);
3202 
3203 	/* Rebuild unless it's a dir and we're rehashing it */
3204 	if (LINUX_S_ISDIR(inode->i_mode) &&
3205 	    e2fsck_dir_will_be_rehashed(ctx, ino))
3206 		return;
3207 
3208 	if (ctx->options & E2F_OPT_CONVERT_BMAP)
3209 		e2fsck_rebuild_extents_later(ctx, ino);
3210 	else
3211 		e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
3212 }
3213 
3214 /*
3215  * In fact we don't need to check blocks for an inode with inline data
3216  * because this inode doesn't have any blocks.  In this function all
3217  * we need to do is add this inode into dblist when it is a directory.
3218  */
check_blocks_inline_data(e2fsck_t ctx,struct problem_context * pctx,struct process_block_struct * pb)3219 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
3220 				     struct process_block_struct *pb)
3221 {
3222 	int	flags;
3223 	size_t	inline_data_size = 0;
3224 
3225 	if (!pb->is_dir) {
3226 		pctx->errcode = 0;
3227 		return;
3228 	}
3229 
3230 	/* Process the dirents in i_block[] as the "first" block. */
3231 	pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
3232 	if (pctx->errcode)
3233 		goto err;
3234 
3235 	/* Process the dirents in the EA as a "second" block. */
3236 	flags = ctx->fs->flags;
3237 	ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3238 	pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
3239 						&inline_data_size);
3240 	ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3241 			 (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3242 	if (pctx->errcode) {
3243 		pctx->errcode = 0;
3244 		return;
3245 	}
3246 
3247 	if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
3248 		return;
3249 
3250 	pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
3251 	if (pctx->errcode)
3252 		goto err;
3253 
3254 	return;
3255 err:
3256 	pctx->blk = 0;
3257 	pctx->num = 0;
3258 	fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3259 	ctx->flags |= E2F_FLAG_ABORT;
3260 }
3261 
3262 /*
3263  * This subroutine is called on each inode to account for all of the
3264  * blocks used by that inode.
3265  */
check_blocks(e2fsck_t ctx,struct problem_context * pctx,char * block_buf,const struct ea_quota * ea_ibody_quota)3266 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
3267 			 char *block_buf, const struct ea_quota *ea_ibody_quota)
3268 {
3269 	ext2_filsys fs = ctx->fs;
3270 	struct process_block_struct pb;
3271 	ext2_ino_t	ino = pctx->ino;
3272 	struct ext2_inode *inode = pctx->inode;
3273 	unsigned	bad_size = 0;
3274 	int		dirty_inode = 0;
3275 	int		extent_fs;
3276 	int		inlinedata_fs;
3277 	__u64		size;
3278 	struct ea_quota	ea_block_quota;
3279 
3280 	pb.ino = ino;
3281 	pb.num_blocks = EXT2FS_B2C(ctx->fs,
3282 				   ea_ibody_quota ? ea_ibody_quota->blocks : 0);
3283 	pb.last_block = ~0;
3284 	pb.last_init_lblock = -1;
3285 	pb.last_db_block = -1;
3286 	pb.num_illegal_blocks = 0;
3287 	pb.suppress = 0; pb.clear = 0;
3288 	pb.fragmented = 0;
3289 	pb.compressed = 0;
3290 	pb.previous_block = 0;
3291 	pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
3292 	pb.is_reg = LINUX_S_ISREG(inode->i_mode);
3293 	pb.max_blocks = 1U << (31 - fs->super->s_log_block_size);
3294 	pb.inode = inode;
3295 	pb.pctx = pctx;
3296 	pb.ctx = ctx;
3297 	pb.inode_modified = 0;
3298 	pb.eti.force_rebuild = 0;
3299 	pctx->ino = ino;
3300 	pctx->errcode = 0;
3301 
3302 	extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
3303 	inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
3304 
3305 	if (check_ext_attr(ctx, pctx, block_buf, &ea_block_quota)) {
3306 		if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3307 			goto out;
3308 		pb.num_blocks += EXT2FS_B2C(ctx->fs, ea_block_quota.blocks);
3309 	}
3310 
3311 	if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
3312 		check_blocks_inline_data(ctx, pctx, &pb);
3313 	else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
3314 		if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
3315 			check_blocks_extents(ctx, pctx, &pb);
3316 		else {
3317 			int flags;
3318 			/*
3319 			 * If we've modified the inode, write it out before
3320 			 * iterate() tries to use it.
3321 			 */
3322 			if (dirty_inode) {
3323 				e2fsck_write_inode(ctx, ino, inode,
3324 						   "check_blocks");
3325 				dirty_inode = 0;
3326 			}
3327 			flags = fs->flags;
3328 			fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3329 			pctx->errcode = ext2fs_block_iterate3(fs, ino,
3330 						pb.is_dir ? BLOCK_FLAG_HOLE : 0,
3331 						block_buf, process_block, &pb);
3332 			/*
3333 			 * We do not have uninitialized extents in non extent
3334 			 * files.
3335 			 */
3336 			pb.last_init_lblock = pb.last_block;
3337 			/*
3338 			 * If iterate() changed a block mapping, we have to
3339 			 * re-read the inode.  If we decide to clear the
3340 			 * inode after clearing some stuff, we'll re-write the
3341 			 * bad mappings into the inode!
3342 			 */
3343 			if (pb.inode_modified)
3344 				e2fsck_read_inode(ctx, ino, inode,
3345 						  "check_blocks");
3346 			fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3347 				    (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3348 
3349 			if (ctx->options & E2F_OPT_CONVERT_BMAP) {
3350 #ifdef DEBUG
3351 				printf("bmap rebuild ino=%d\n", ino);
3352 #endif
3353 				if (!LINUX_S_ISDIR(inode->i_mode) ||
3354 				    !e2fsck_dir_will_be_rehashed(ctx, ino))
3355 					e2fsck_rebuild_extents_later(ctx, ino);
3356 			}
3357 		}
3358 	}
3359 	end_problem_latch(ctx, PR_LATCH_BLOCK);
3360 	end_problem_latch(ctx, PR_LATCH_TOOBIG);
3361 	if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3362 		goto out;
3363 	if (pctx->errcode)
3364 		fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
3365 
3366 	if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
3367 		if (LINUX_S_ISDIR(inode->i_mode))
3368 			ctx->fs_fragmented_dir++;
3369 		else
3370 			ctx->fs_fragmented++;
3371 	}
3372 
3373 	if (pb.clear) {
3374 		e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3375 				   "check_blocks");
3376 		return;
3377 	}
3378 
3379 	if (inode->i_flags & EXT2_INDEX_FL) {
3380 		if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
3381 			inode->i_flags &= ~EXT2_INDEX_FL;
3382 			dirty_inode++;
3383 		} else {
3384 			e2fsck_add_dx_dir(ctx, ino, pb.last_block+1);
3385 		}
3386 	}
3387 
3388 	if (!pb.num_blocks && pb.is_dir &&
3389 	    !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
3390 		if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
3391 			e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
3392 			ctx->fs_directory_count--;
3393 			return;
3394 		}
3395 	}
3396 
3397 	if (ino != quota_type2inum(PRJQUOTA, fs->super) &&
3398 	    (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) &&
3399 	    !(inode->i_flags & EXT4_EA_INODE_FL)) {
3400 		quota_data_add(ctx->qctx, (struct ext2_inode_large *) inode,
3401 			       ino,
3402 			       pb.num_blocks * EXT2_CLUSTER_SIZE(fs->super));
3403 		quota_data_inodes(ctx->qctx, (struct ext2_inode_large *) inode,
3404 				  ino, (ea_ibody_quota ?
3405 					ea_ibody_quota->inodes : 0) +
3406 						ea_block_quota.inodes + 1);
3407 	}
3408 
3409 	if (!ext2fs_has_feature_huge_file(fs->super) ||
3410 	    !(inode->i_flags & EXT4_HUGE_FILE_FL))
3411 		pb.num_blocks *= (fs->blocksize / 512);
3412 	pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
3413 #if 0
3414 	printf("inode %u, i_size = %u, last_block = %llu, i_blocks=%llu, num_blocks = %llu\n",
3415 	       ino, inode->i_size, pb.last_block, ext2fs_inode_i_blocks(fs, inode),
3416 	       pb.num_blocks);
3417 #endif
3418 	if (pb.is_dir) {
3419 		unsigned nblock = inode->i_size >> EXT2_BLOCK_SIZE_BITS(fs->super);
3420 		if (inode->i_flags & EXT4_INLINE_DATA_FL) {
3421 			int flags;
3422 			size_t sz = 0;
3423 			errcode_t err;
3424 
3425 			flags = ctx->fs->flags;
3426 			ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3427 			err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
3428 						      &sz);
3429 			ctx->fs->flags = (flags &
3430 					  EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3431 					 (ctx->fs->flags &
3432 					  ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3433 			if (err || sz != inode->i_size) {
3434 				bad_size = 7;
3435 				pctx->num = sz;
3436 			}
3437 		} else if (inode->i_size & (fs->blocksize - 1))
3438 			bad_size = 5;
3439 		else if (nblock > (pb.last_block + 1))
3440 			bad_size = 1;
3441 		else if (nblock < (pb.last_block + 1)) {
3442 			if (((pb.last_block + 1) - nblock) >
3443 			    fs->super->s_prealloc_dir_blocks)
3444 				bad_size = 2;
3445 		}
3446 	} else {
3447 		size = EXT2_I_SIZE(inode);
3448 		if ((pb.last_init_lblock >= 0) &&
3449 		    /* Do not allow initialized allocated blocks past i_size*/
3450 		    (size < (__u64)pb.last_init_lblock * fs->blocksize) &&
3451 		    !(inode->i_flags & EXT4_VERITY_FL))
3452 			bad_size = 3;
3453 		else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3454 			 size > ext2_max_sizes[fs->super->s_log_block_size])
3455 			/* too big for a direct/indirect-mapped file */
3456 			bad_size = 4;
3457 		else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3458 			 size >
3459 			 ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
3460 			/* too big for an extent-based file - 32bit ee_block */
3461 			bad_size = 6;
3462 	}
3463 	/* i_size for symlinks is checked elsewhere */
3464 	if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
3465 		/* Did inline_data set pctx->num earlier? */
3466 		if (bad_size != 7)
3467 			pctx->num = (pb.last_block + 1) * fs->blocksize;
3468 		pctx->group = bad_size;
3469 		if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
3470 			if (LINUX_S_ISDIR(inode->i_mode))
3471 				pctx->num &= 0xFFFFFFFFULL;
3472 			ext2fs_inode_size_set(fs, inode, pctx->num);
3473 			if (EXT2_I_SIZE(inode) == 0 &&
3474 			    (inode->i_flags & EXT4_INLINE_DATA_FL)) {
3475 				memset(inode->i_block, 0,
3476 				       sizeof(inode->i_block));
3477 				inode->i_flags &= ~EXT4_INLINE_DATA_FL;
3478 			}
3479 			dirty_inode++;
3480 		}
3481 		pctx->num = 0;
3482 	}
3483 	if (LINUX_S_ISREG(inode->i_mode) &&
3484 	    ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3485 		ctx->large_files++;
3486 	if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
3487 	    ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
3488 	     (ext2fs_has_feature_huge_file(fs->super) &&
3489 	      (inode->i_flags & EXT4_HUGE_FILE_FL) &&
3490 	      (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
3491 		pctx->num = pb.num_blocks;
3492 		if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
3493 			inode->i_blocks = pb.num_blocks;
3494 			inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
3495 			dirty_inode++;
3496 		}
3497 		pctx->num = 0;
3498 	}
3499 
3500 	/*
3501 	 * The kernel gets mad if we ask it to allocate bigalloc clusters to
3502 	 * a block mapped file, so rebuild it as an extent file.  We can skip
3503 	 * symlinks because they're never rewritten.
3504 	 */
3505 	if (ext2fs_has_feature_bigalloc(fs->super) &&
3506 	    (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
3507 	    ext2fs_inode_data_blocks2(fs, inode) > 0 &&
3508 	    (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
3509 	    !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
3510 	    fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
3511 		pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
3512 		if (pctx->errcode)
3513 			goto out;
3514 	}
3515 
3516 	if (ctx->dirs_to_hash && pb.is_dir &&
3517 	    !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
3518 	    !(inode->i_flags & EXT2_INDEX_FL) &&
3519 	    ((inode->i_size / fs->blocksize) >= 3))
3520 		e2fsck_rehash_dir_later(ctx, ino);
3521 
3522 out:
3523 	if (dirty_inode)
3524 		e2fsck_write_inode(ctx, ino, inode, "check_blocks");
3525 }
3526 
3527 #if 0
3528 /*
3529  * Helper function called by process block when an illegal block is
3530  * found.  It returns a description about why the block is illegal
3531  */
3532 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
3533 {
3534 	blk64_t	super;
3535 	int	i;
3536 	static char	problem[80];
3537 
3538 	super = fs->super->s_first_data_block;
3539 	strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
3540 	if (block < super) {
3541 		sprintf(problem, "< FIRSTBLOCK (%u)", super);
3542 		return(problem);
3543 	} else if (block >= ext2fs_blocks_count(fs->super)) {
3544 		sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
3545 		return(problem);
3546 	}
3547 	for (i = 0; i < fs->group_desc_count; i++) {
3548 		if (block == super) {
3549 			sprintf(problem, "is the superblock in group %d", i);
3550 			break;
3551 		}
3552 		if (block > super &&
3553 		    block <= (super + fs->desc_blocks)) {
3554 			sprintf(problem, "is in the group descriptors "
3555 				"of group %d", i);
3556 			break;
3557 		}
3558 		if (block == ext2fs_block_bitmap_loc(fs, i)) {
3559 			sprintf(problem, "is the block bitmap of group %d", i);
3560 			break;
3561 		}
3562 		if (block == ext2fs_inode_bitmap_loc(fs, i)) {
3563 			sprintf(problem, "is the inode bitmap of group %d", i);
3564 			break;
3565 		}
3566 		if (block >= ext2fs_inode_table_loc(fs, i) &&
3567 		    (block < ext2fs_inode_table_loc(fs, i)
3568 		     + fs->inode_blocks_per_group)) {
3569 			sprintf(problem, "is in the inode table of group %d",
3570 				i);
3571 			break;
3572 		}
3573 		super += fs->super->s_blocks_per_group;
3574 	}
3575 	return(problem);
3576 }
3577 #endif
3578 
3579 /*
3580  * This is a helper function for check_blocks().
3581  */
process_block(ext2_filsys fs,blk64_t * block_nr,e2_blkcnt_t blockcnt,blk64_t ref_block EXT2FS_ATTR ((unused)),int ref_offset EXT2FS_ATTR ((unused)),void * priv_data)3582 static int process_block(ext2_filsys fs,
3583 		  blk64_t	*block_nr,
3584 		  e2_blkcnt_t blockcnt,
3585 		  blk64_t ref_block EXT2FS_ATTR((unused)),
3586 		  int ref_offset EXT2FS_ATTR((unused)),
3587 		  void *priv_data)
3588 {
3589 	struct process_block_struct *p;
3590 	struct problem_context *pctx;
3591 	blk64_t	blk = *block_nr;
3592 	int	ret_code = 0;
3593 	problem_t	problem = 0;
3594 	e2fsck_t	ctx;
3595 
3596 	p = (struct process_block_struct *) priv_data;
3597 	pctx = p->pctx;
3598 	ctx = p->ctx;
3599 
3600 	/*
3601 	 * For a directory, add logical block zero for processing even if it's
3602 	 * not mapped or we'll be perennially stuck with broken "." and ".."
3603 	 * entries.
3604 	 */
3605 	if (p->is_dir && blockcnt == 0 && blk == 0) {
3606 		pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
3607 		if (pctx->errcode) {
3608 			pctx->blk = blk;
3609 			pctx->num = blockcnt;
3610 			goto failed_add_dir_block;
3611 		}
3612 		p->last_db_block++;
3613 	}
3614 
3615 	if (blk == 0)
3616 		return 0;
3617 
3618 #if 0
3619 	printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
3620 	       blockcnt);
3621 #endif
3622 
3623 	/*
3624 	 * Simplistic fragmentation check.  We merely require that the
3625 	 * file be contiguous.  (Which can never be true for really
3626 	 * big files that are greater than a block group.)
3627 	 */
3628 	if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
3629 		if (p->previous_block+1 != blk) {
3630 			if (ctx->options & E2F_OPT_FRAGCHECK) {
3631 				char type = '?';
3632 
3633 				if (p->is_dir)
3634 					type = 'd';
3635 				else if (p->is_reg)
3636 					type = 'f';
3637 
3638 				printf(_("%6lu(%c): expecting %6lu "
3639 					 "got phys %6lu (blkcnt %lld)\n"),
3640 				       (unsigned long) pctx->ino, type,
3641 				       (unsigned long) p->previous_block+1,
3642 				       (unsigned long) blk,
3643 				       blockcnt);
3644 			}
3645 			p->fragmented = 1;
3646 		}
3647 	}
3648 
3649 	if (p->is_dir && blockcnt > (1 << (21 - fs->super->s_log_block_size)))
3650 		problem = PR_1_TOOBIG_DIR;
3651 	if (p->is_reg && p->num_blocks+1 >= p->max_blocks)
3652 		problem = PR_1_TOOBIG_REG;
3653 	if (!p->is_dir && !p->is_reg && blockcnt > 0)
3654 		problem = PR_1_TOOBIG_SYMLINK;
3655 
3656 	if (blk < fs->super->s_first_data_block ||
3657 	    blk >= ext2fs_blocks_count(fs->super))
3658 		problem = PR_1_ILLEGAL_BLOCK_NUM;
3659 
3660 	/*
3661 	 * If this IND/DIND/TIND block is squatting atop some critical metadata
3662 	 * (group descriptors, superblock, bitmap, inode table), any write to
3663 	 * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
3664 	 * fix that and restart fsck.
3665 	 */
3666 	if (blockcnt < 0 &&
3667 	    p->ino != EXT2_RESIZE_INO &&
3668 	    blk < ctx->fs->super->s_blocks_count &&
3669 	    ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
3670 		pctx->blk = blk;
3671 		fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
3672 		if ((ctx->options & E2F_OPT_NO) == 0)
3673 			ctx->flags |= E2F_FLAG_RESTART_LATER;
3674 	}
3675 
3676 	if (problem) {
3677 		p->num_illegal_blocks++;
3678 		/*
3679 		 * A bit of subterfuge here -- we're trying to fix a block
3680 		 * mapping, but the IND/DIND/TIND block could have collided
3681 		 * with some critical metadata.  So, fix the in-core mapping so
3682 		 * iterate won't go insane, but return 0 instead of
3683 		 * BLOCK_CHANGED so that it won't write the remapping out to
3684 		 * our multiply linked block.
3685 		 *
3686 		 * Even if we previously determined that an *IND block
3687 		 * conflicts with critical metadata, we must still try to
3688 		 * iterate the *IND block as if it is an *IND block to find and
3689 		 * mark the blocks it points to.  Better to be overly cautious
3690 		 * with the used_blocks map so that we don't move the *IND
3691 		 * block to a block that's really in use!
3692 		 */
3693 		if (p->ino != EXT2_RESIZE_INO &&
3694 		    ref_block != 0 &&
3695 		    ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3696 					      ref_block)) {
3697 			*block_nr = 0;
3698 			return 0;
3699 		}
3700 		if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
3701 			if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
3702 				p->clear = 1;
3703 				return BLOCK_ABORT;
3704 			}
3705 			if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
3706 				p->suppress = 1;
3707 				set_latch_flags(PR_LATCH_BLOCK,
3708 						PRL_SUPPRESS, 0);
3709 			}
3710 		}
3711 		pctx->blk = blk;
3712 		pctx->blkcount = blockcnt;
3713 		if (fix_problem(ctx, problem, pctx)) {
3714 			blk = *block_nr = 0;
3715 			ret_code = BLOCK_CHANGED;
3716 			p->inode_modified = 1;
3717 			/*
3718 			 * If the directory block is too big and is beyond the
3719 			 * end of the FS, don't bother trying to add it for
3720 			 * processing -- the kernel would never have created a
3721 			 * directory this large, and we risk an ENOMEM abort.
3722 			 * In any case, the toobig handler for extent-based
3723 			 * directories also doesn't feed toobig blocks to
3724 			 * pass 2.
3725 			 */
3726 			if (problem == PR_1_TOOBIG_DIR)
3727 				return ret_code;
3728 			goto mark_dir;
3729 		} else
3730 			return 0;
3731 	}
3732 
3733 	if (p->ino == EXT2_RESIZE_INO) {
3734 		/*
3735 		 * The resize inode has already be sanity checked
3736 		 * during pass #0 (the superblock checks).  All we
3737 		 * have to do is mark the double indirect block as
3738 		 * being in use; all of the other blocks are handled
3739 		 * by mark_table_blocks()).
3740 		 */
3741 		if (blockcnt == BLOCK_COUNT_DIND)
3742 			mark_block_used(ctx, blk);
3743 		p->num_blocks++;
3744 	} else if (!(ctx->fs->cluster_ratio_bits &&
3745 		     p->previous_block &&
3746 		     (EXT2FS_B2C(ctx->fs, blk) ==
3747 		      EXT2FS_B2C(ctx->fs, p->previous_block)) &&
3748 		     (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
3749 		     ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
3750 		mark_block_used(ctx, blk);
3751 		p->num_blocks++;
3752 	} else if (has_unaligned_cluster_map(ctx, p->previous_block,
3753 					     p->last_block, blk, blockcnt)) {
3754 		pctx->blk = blockcnt;
3755 		pctx->blk2 = blk;
3756 		fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3757 		mark_block_used(ctx, blk);
3758 		mark_block_used(ctx, blk);
3759 	}
3760 	if (blockcnt >= 0)
3761 		p->last_block = blockcnt;
3762 	p->previous_block = blk;
3763 mark_dir:
3764 	if (p->is_dir && (blockcnt >= 0)) {
3765 		while (++p->last_db_block < blockcnt) {
3766 			pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
3767 							      p->ino, 0,
3768 							      p->last_db_block);
3769 			if (pctx->errcode) {
3770 				pctx->blk = 0;
3771 				pctx->num = p->last_db_block;
3772 				goto failed_add_dir_block;
3773 			}
3774 		}
3775 		pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
3776 						      blk, blockcnt);
3777 		if (pctx->errcode) {
3778 			pctx->blk = blk;
3779 			pctx->num = blockcnt;
3780 		failed_add_dir_block:
3781 			fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3782 			/* Should never get here */
3783 			ctx->flags |= E2F_FLAG_ABORT;
3784 			return BLOCK_ABORT;
3785 		}
3786 	}
3787 	return ret_code;
3788 }
3789 
process_bad_block(ext2_filsys fs,blk64_t * block_nr,e2_blkcnt_t blockcnt,blk64_t ref_block EXT2FS_ATTR ((unused)),int ref_offset EXT2FS_ATTR ((unused)),void * priv_data)3790 static int process_bad_block(ext2_filsys fs,
3791 		      blk64_t *block_nr,
3792 		      e2_blkcnt_t blockcnt,
3793 		      blk64_t ref_block EXT2FS_ATTR((unused)),
3794 		      int ref_offset EXT2FS_ATTR((unused)),
3795 		      void *priv_data)
3796 {
3797 	struct process_block_struct *p;
3798 	blk64_t		blk = *block_nr;
3799 	blk64_t		first_block;
3800 	dgrp_t		i;
3801 	struct problem_context *pctx;
3802 	e2fsck_t	ctx;
3803 
3804 	if (!blk)
3805 		return 0;
3806 
3807 	p = (struct process_block_struct *) priv_data;
3808 	ctx = p->ctx;
3809 	pctx = p->pctx;
3810 
3811 	pctx->ino = EXT2_BAD_INO;
3812 	pctx->blk = blk;
3813 	pctx->blkcount = blockcnt;
3814 
3815 	if ((blk < fs->super->s_first_data_block) ||
3816 	    (blk >= ext2fs_blocks_count(fs->super))) {
3817 		if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
3818 			*block_nr = 0;
3819 			return BLOCK_CHANGED;
3820 		} else
3821 			return 0;
3822 	}
3823 
3824 	if (blockcnt < 0) {
3825 		if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
3826 			p->bbcheck = 1;
3827 			if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
3828 				*block_nr = 0;
3829 				return BLOCK_CHANGED;
3830 			}
3831 		} else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3832 						    blk)) {
3833 			p->bbcheck = 1;
3834 			if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
3835 					pctx)) {
3836 				*block_nr = 0;
3837 				return BLOCK_CHANGED;
3838 			}
3839 			if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3840 				return BLOCK_ABORT;
3841 		} else
3842 			mark_block_used(ctx, blk);
3843 		return 0;
3844 	}
3845 #if 0
3846 	printf ("DEBUG: Marking %u as bad.\n", blk);
3847 #endif
3848 	ctx->fs_badblocks_count++;
3849 	/*
3850 	 * If the block is not used, then mark it as used and return.
3851 	 * If it is already marked as found, this must mean that
3852 	 * there's an overlap between the filesystem table blocks
3853 	 * (bitmaps and inode table) and the bad block list.
3854 	 */
3855 	if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
3856 		ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
3857 		return 0;
3858 	}
3859 	/*
3860 	 * Try to find the where the filesystem block was used...
3861 	 */
3862 	first_block = fs->super->s_first_data_block;
3863 
3864 	for (i = 0; i < fs->group_desc_count; i++ ) {
3865 		pctx->group = i;
3866 		pctx->blk = blk;
3867 		if (!ext2fs_bg_has_super(fs, i))
3868 			goto skip_super;
3869 		if (blk == first_block) {
3870 			if (i == 0) {
3871 				if (fix_problem(ctx,
3872 						PR_1_BAD_PRIMARY_SUPERBLOCK,
3873 						pctx)) {
3874 					*block_nr = 0;
3875 					return BLOCK_CHANGED;
3876 				}
3877 				return 0;
3878 			}
3879 			fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
3880 			return 0;
3881 		}
3882 		if ((blk > first_block) &&
3883 		    (blk <= first_block + fs->desc_blocks)) {
3884 			if (i == 0) {
3885 				pctx->blk = *block_nr;
3886 				if (fix_problem(ctx,
3887 			PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
3888 					*block_nr = 0;
3889 					return BLOCK_CHANGED;
3890 				}
3891 				return 0;
3892 			}
3893 			fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
3894 			return 0;
3895 		}
3896 	skip_super:
3897 		if (blk == ext2fs_block_bitmap_loc(fs, i)) {
3898 			if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
3899 				ctx->invalid_block_bitmap_flag[i]++;
3900 				ctx->invalid_bitmaps++;
3901 			}
3902 			return 0;
3903 		}
3904 		if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
3905 			if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
3906 				ctx->invalid_inode_bitmap_flag[i]++;
3907 				ctx->invalid_bitmaps++;
3908 			}
3909 			return 0;
3910 		}
3911 		if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
3912 		    (blk < (ext2fs_inode_table_loc(fs, i) +
3913 			    fs->inode_blocks_per_group))) {
3914 			/*
3915 			 * If there are bad blocks in the inode table,
3916 			 * the inode scan code will try to do
3917 			 * something reasonable automatically.
3918 			 */
3919 			return 0;
3920 		}
3921 		first_block += fs->super->s_blocks_per_group;
3922 	}
3923 	/*
3924 	 * If we've gotten to this point, then the only
3925 	 * possibility is that the bad block inode meta data
3926 	 * is using a bad block.
3927 	 */
3928 	if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
3929 	    (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
3930 	    (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
3931 		p->bbcheck = 1;
3932 		if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
3933 			*block_nr = 0;
3934 			return BLOCK_CHANGED;
3935 		}
3936 		if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3937 			return BLOCK_ABORT;
3938 		return 0;
3939 	}
3940 
3941 	pctx->group = -1;
3942 
3943 	/* Warn user that the block wasn't claimed */
3944 	fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
3945 
3946 	return 0;
3947 }
3948 
new_table_block(e2fsck_t ctx,blk64_t first_block,dgrp_t group,const char * name,int num,blk64_t * new_block)3949 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
3950 			    const char *name, int num, blk64_t *new_block)
3951 {
3952 	ext2_filsys fs = ctx->fs;
3953 	dgrp_t		last_grp;
3954 	blk64_t		old_block = *new_block;
3955 	blk64_t		last_block;
3956 	dgrp_t		flexbg;
3957 	unsigned	flexbg_size;
3958 	int		i, is_flexbg;
3959 	char		*buf;
3960 	struct problem_context	pctx;
3961 
3962 	clear_problem_context(&pctx);
3963 
3964 	pctx.group = group;
3965 	pctx.blk = old_block;
3966 	pctx.str = name;
3967 
3968 	/*
3969 	 * For flex_bg filesystems, first try to allocate the metadata
3970 	 * within the flex_bg, and if that fails then try finding the
3971 	 * space anywhere in the filesystem.
3972 	 */
3973 	is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
3974 	if (is_flexbg) {
3975 		flexbg_size = 1 << fs->super->s_log_groups_per_flex;
3976 		flexbg = group / flexbg_size;
3977 		first_block = ext2fs_group_first_block2(fs,
3978 							flexbg_size * flexbg);
3979 		last_grp = group | (flexbg_size - 1);
3980 		if (last_grp >= fs->group_desc_count)
3981 			last_grp = fs->group_desc_count - 1;
3982 		last_block = ext2fs_group_last_block2(fs, last_grp);
3983 	} else
3984 		last_block = ext2fs_group_last_block2(fs, group);
3985 	pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
3986 					       num, ctx->block_found_map,
3987 					       new_block);
3988 	if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
3989 		pctx.errcode = ext2fs_get_free_blocks2(fs,
3990 				fs->super->s_first_data_block,
3991 				ext2fs_blocks_count(fs->super),
3992 				num, ctx->block_found_map, new_block);
3993 	if (pctx.errcode) {
3994 		pctx.num = num;
3995 		fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
3996 		ext2fs_unmark_valid(fs);
3997 		ctx->flags |= E2F_FLAG_ABORT;
3998 		return;
3999 	}
4000 	pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
4001 	if (pctx.errcode) {
4002 		fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
4003 		ext2fs_unmark_valid(fs);
4004 		ctx->flags |= E2F_FLAG_ABORT;
4005 		return;
4006 	}
4007 	ext2fs_mark_super_dirty(fs);
4008 	fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
4009 	pctx.blk2 = *new_block;
4010 	fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
4011 			  PR_1_RELOC_TO), &pctx);
4012 	pctx.blk2 = 0;
4013 	for (i = 0; i < num; i++) {
4014 		pctx.blk = i;
4015 		ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
4016 		if (old_block) {
4017 			pctx.errcode = io_channel_read_blk64(fs->io,
4018 				   old_block + i, 1, buf);
4019 			if (pctx.errcode)
4020 				fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
4021 			pctx.blk = (*new_block) + i;
4022 			pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
4023 							      1, buf);
4024 		} else {
4025 			pctx.blk = (*new_block) + i;
4026 			pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
4027 							   NULL, NULL);
4028 		}
4029 
4030 		if (pctx.errcode)
4031 			fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
4032 	}
4033 	ext2fs_free_mem(&buf);
4034 }
4035 
4036 /*
4037  * This routine gets called at the end of pass 1 if bad blocks are
4038  * detected in the superblock, group descriptors, inode_bitmaps, or
4039  * block bitmaps.  At this point, all of the blocks have been mapped
4040  * out, so we can try to allocate new block(s) to replace the bad
4041  * blocks.
4042  */
handle_fs_bad_blocks(e2fsck_t ctx)4043 static void handle_fs_bad_blocks(e2fsck_t ctx)
4044 {
4045 	ext2_filsys fs = ctx->fs;
4046 	dgrp_t		i;
4047 	blk64_t		first_block;
4048 	blk64_t		new_blk;
4049 
4050 	for (i = 0; i < fs->group_desc_count; i++) {
4051 		first_block = ext2fs_group_first_block2(fs, i);
4052 
4053 		if (ctx->invalid_block_bitmap_flag[i]) {
4054 			new_blk = ext2fs_block_bitmap_loc(fs, i);
4055 			new_table_block(ctx, first_block, i, _("block bitmap"),
4056 					1, &new_blk);
4057 			ext2fs_block_bitmap_loc_set(fs, i, new_blk);
4058 		}
4059 		if (ctx->invalid_inode_bitmap_flag[i]) {
4060 			new_blk = ext2fs_inode_bitmap_loc(fs, i);
4061 			new_table_block(ctx, first_block, i, _("inode bitmap"),
4062 					1, &new_blk);
4063 			ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
4064 		}
4065 		if (ctx->invalid_inode_table_flag[i]) {
4066 			new_blk = ext2fs_inode_table_loc(fs, i);
4067 			new_table_block(ctx, first_block, i, _("inode table"),
4068 					fs->inode_blocks_per_group,
4069 					&new_blk);
4070 			ext2fs_inode_table_loc_set(fs, i, new_blk);
4071 			ctx->flags |= E2F_FLAG_RESTART;
4072 		}
4073 	}
4074 	ctx->invalid_bitmaps = 0;
4075 }
4076 
4077 /*
4078  * This routine marks all blocks which are used by the superblock,
4079  * group descriptors, inode bitmaps, and block bitmaps.
4080  */
mark_table_blocks(e2fsck_t ctx)4081 static void mark_table_blocks(e2fsck_t ctx)
4082 {
4083 	ext2_filsys fs = ctx->fs;
4084 	blk64_t	b;
4085 	dgrp_t	i;
4086 	unsigned int	j;
4087 	struct problem_context pctx;
4088 
4089 	clear_problem_context(&pctx);
4090 
4091 	for (i = 0; i < fs->group_desc_count; i++) {
4092 		pctx.group = i;
4093 
4094 		ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
4095 		ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
4096 
4097 		/*
4098 		 * Mark the blocks used for the inode table
4099 		 */
4100 		if (ext2fs_inode_table_loc(fs, i)) {
4101 			for (j = 0, b = ext2fs_inode_table_loc(fs, i);
4102 			     j < fs->inode_blocks_per_group;
4103 			     j++, b++) {
4104 				if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4105 							     b)) {
4106 					pctx.blk = b;
4107 					if (!ctx->invalid_inode_table_flag[i] &&
4108 					    fix_problem(ctx,
4109 						PR_1_ITABLE_CONFLICT, &pctx)) {
4110 						ctx->invalid_inode_table_flag[i]++;
4111 						ctx->invalid_bitmaps++;
4112 					}
4113 				} else {
4114 				    ext2fs_mark_block_bitmap2(
4115 						ctx->block_found_map, b);
4116 				    ext2fs_mark_block_bitmap2(
4117 						ctx->block_metadata_map, b);
4118 			    	}
4119 			}
4120 		}
4121 
4122 		/*
4123 		 * Mark block used for the block bitmap
4124 		 */
4125 		if (ext2fs_block_bitmap_loc(fs, i)) {
4126 			if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4127 				     ext2fs_block_bitmap_loc(fs, i))) {
4128 				pctx.blk = ext2fs_block_bitmap_loc(fs, i);
4129 				if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
4130 					ctx->invalid_block_bitmap_flag[i]++;
4131 					ctx->invalid_bitmaps++;
4132 				}
4133 			} else {
4134 			    ext2fs_mark_block_bitmap2(ctx->block_found_map,
4135 				     ext2fs_block_bitmap_loc(fs, i));
4136 			    ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4137 				     ext2fs_block_bitmap_loc(fs, i));
4138 			}
4139 		}
4140 		/*
4141 		 * Mark block used for the inode bitmap
4142 		 */
4143 		if (ext2fs_inode_bitmap_loc(fs, i)) {
4144 			if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4145 				     ext2fs_inode_bitmap_loc(fs, i))) {
4146 				pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
4147 				if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
4148 					ctx->invalid_inode_bitmap_flag[i]++;
4149 					ctx->invalid_bitmaps++;
4150 				}
4151 			} else {
4152 			    ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4153 				     ext2fs_inode_bitmap_loc(fs, i));
4154 			    ext2fs_mark_block_bitmap2(ctx->block_found_map,
4155 				     ext2fs_inode_bitmap_loc(fs, i));
4156 			}
4157 		}
4158 	}
4159 }
4160 
4161 /*
4162  * These subroutines short circuits ext2fs_get_blocks and
4163  * ext2fs_check_directory; we use them since we already have the inode
4164  * structure, so there's no point in letting the ext2fs library read
4165  * the inode again.
4166  */
pass1_get_blocks(ext2_filsys fs,ext2_ino_t ino,blk_t * blocks)4167 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
4168 				  blk_t *blocks)
4169 {
4170 	e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4171 	int	i;
4172 
4173 	if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4174 		return EXT2_ET_CALLBACK_NOTHANDLED;
4175 
4176 	for (i=0; i < EXT2_N_BLOCKS; i++)
4177 		blocks[i] = ctx->stashed_inode->i_block[i];
4178 	return 0;
4179 }
4180 
pass1_read_inode(ext2_filsys fs,ext2_ino_t ino,struct ext2_inode * inode)4181 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
4182 				  struct ext2_inode *inode)
4183 {
4184 	e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4185 
4186 	if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4187 		return EXT2_ET_CALLBACK_NOTHANDLED;
4188 	*inode = *ctx->stashed_inode;
4189 	return 0;
4190 }
4191 
pass1_write_inode(ext2_filsys fs,ext2_ino_t ino,struct ext2_inode * inode)4192 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
4193 			    struct ext2_inode *inode)
4194 {
4195 	e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4196 
4197 	if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
4198 		(inode != ctx->stashed_inode))
4199 		*ctx->stashed_inode = *inode;
4200 	return EXT2_ET_CALLBACK_NOTHANDLED;
4201 }
4202 
pass1_check_directory(ext2_filsys fs,ext2_ino_t ino)4203 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
4204 {
4205 	e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4206 
4207 	if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4208 		return EXT2_ET_CALLBACK_NOTHANDLED;
4209 
4210 	if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
4211 		return EXT2_ET_NO_DIRECTORY;
4212 	return 0;
4213 }
4214 
e2fsck_get_alloc_block(ext2_filsys fs,blk64_t goal,blk64_t * ret)4215 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
4216 					blk64_t *ret)
4217 {
4218 	e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4219 	errcode_t	retval;
4220 	blk64_t		new_block;
4221 
4222 	if (ctx->block_found_map) {
4223 		retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
4224 					   &new_block);
4225 		if (retval)
4226 			return retval;
4227 		if (fs->block_map) {
4228 			ext2fs_mark_block_bitmap2(fs->block_map, new_block);
4229 			ext2fs_mark_bb_dirty(fs);
4230 		}
4231 	} else {
4232 		if (!fs->block_map) {
4233 			retval = ext2fs_read_block_bitmap(fs);
4234 			if (retval)
4235 				return retval;
4236 		}
4237 
4238 		retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
4239 		if (retval)
4240 			return retval;
4241 	}
4242 
4243 	*ret = new_block;
4244 	return (0);
4245 }
4246 
e2fsck_new_range(ext2_filsys fs,int flags,blk64_t goal,blk64_t len,blk64_t * pblk,blk64_t * plen)4247 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
4248 				  blk64_t len, blk64_t *pblk, blk64_t *plen)
4249 {
4250 	e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4251 	errcode_t	retval;
4252 
4253 	if (ctx->block_found_map)
4254 		return ext2fs_new_range(fs, flags, goal, len,
4255 					ctx->block_found_map, pblk, plen);
4256 
4257 	if (!fs->block_map) {
4258 		retval = ext2fs_read_block_bitmap(fs);
4259 		if (retval)
4260 			return retval;
4261 	}
4262 
4263 	return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
4264 				pblk, plen);
4265 }
4266 
e2fsck_block_alloc_stats(ext2_filsys fs,blk64_t blk,int inuse)4267 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
4268 {
4269 	e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4270 
4271 	/* Never free a critical metadata block */
4272 	if (ctx->block_found_map &&
4273 	    ctx->block_metadata_map &&
4274 	    inuse < 0 &&
4275 	    ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
4276 		return;
4277 
4278 	if (ctx->block_found_map) {
4279 		if (inuse > 0)
4280 			ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4281 		else
4282 			ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
4283 	}
4284 }
4285 
e2fsck_block_alloc_stats_range(ext2_filsys fs,blk64_t blk,blk_t num,int inuse)4286 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
4287 					   blk_t num, int inuse)
4288 {
4289 	e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4290 
4291 	/* Never free a critical metadata block */
4292 	if (ctx->block_found_map &&
4293 	    ctx->block_metadata_map &&
4294 	    inuse < 0 &&
4295 	    ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
4296 		return;
4297 
4298 	if (ctx->block_found_map) {
4299 		if (inuse > 0)
4300 			ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
4301 							blk, num);
4302 		else
4303 			ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
4304 							blk, num);
4305 	}
4306 }
4307 
e2fsck_use_inode_shortcuts(e2fsck_t ctx,int use_shortcuts)4308 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
4309 {
4310 	ext2_filsys fs = ctx->fs;
4311 
4312 	if (use_shortcuts) {
4313 		fs->get_blocks = pass1_get_blocks;
4314 		fs->check_directory = pass1_check_directory;
4315 		fs->read_inode = pass1_read_inode;
4316 		fs->write_inode = pass1_write_inode;
4317 		ctx->stashed_ino = 0;
4318 	} else {
4319 		fs->get_blocks = 0;
4320 		fs->check_directory = 0;
4321 		fs->read_inode = 0;
4322 		fs->write_inode = 0;
4323 	}
4324 }
4325 
e2fsck_intercept_block_allocations(e2fsck_t ctx)4326 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
4327 {
4328 	ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
4329 	ext2fs_set_block_alloc_stats_callback(ctx->fs,
4330 						e2fsck_block_alloc_stats, 0);
4331 	ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
4332 	ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
4333 					e2fsck_block_alloc_stats_range, NULL);
4334 }
4335