[thirdparty/e2fsprogs.git] / e2fsck / super.c

/*
 * e2fsck.c - superblock checks
 * 
 * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
 *
 * %Begin-Header%
 * This file may be redistributed under the terms of the GNU Public
 * License.
 * %End-Header%
 */

#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif

#ifndef EXT2_SKIP_UUID
#include "uuid/uuid.h"
#endif
#include "e2fsck.h"
#include "problem.h"

#define MIN_CHECK 1
#define MAX_CHECK 2

static void check_super_value(e2fsck_t ctx, const char *descr,
			      unsigned long value, int flags,
			      unsigned long min_val, unsigned long max_val)
{
	struct		problem_context pctx;

	if (((flags & MIN_CHECK) && (value < min_val)) ||
	    ((flags & MAX_CHECK) && (value > max_val))) {
		clear_problem_context(&pctx);
		pctx.num = value;
		pctx.str = descr;
		fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
		ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
	}
}

/*
 * This routine may get stubbed out in special compilations of the
 * e2fsck code..
 */
#ifndef EXT2_SPECIAL_DEVICE_SIZE
errcode_t e2fsck_get_device_size(e2fsck_t ctx)
{
	return (ext2fs_get_device_size(ctx->filesystem_name,
				       EXT2_BLOCK_SIZE(ctx->fs->super),
				       &ctx->num_blocks));
}
#endif

/*
 * helper function to release an inode
 */
struct process_block_struct {
	ino_t	ino;
	e2fsck_t ctx;
	struct problem_context *pctx;
	int	abort;
};

static int release_inode_block(ext2_filsys fs,
			       blk_t	*block_nr,
			       int blockcnt,
			       void *priv_data)
{
	struct process_block_struct *pb;
	e2fsck_t ctx;
	struct problem_context *pctx;
	blk_t	blk = *block_nr;

	pb = (struct process_block_struct *) priv_data;
	ctx = pb->ctx;
	pctx = pb->pctx;

	pctx->blk = blk;
	pctx->blkcount = blockcnt;

	if (HOLE_BLKADDR(blk))
		return 0;

	if ((blk < fs->super->s_first_data_block) ||
	    (blk >= fs->super->s_blocks_count)) {
		fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM, pctx);
		pb->abort = 1;
		return BLOCK_ABORT;
	}

	if (!ext2fs_test_block_bitmap(fs->block_map, blk)) {
		fix_problem(ctx, PR_0_ORPHAN_ALREADY_CLEARED_BLOCK, pctx);
		pb->abort = 1;
		return BLOCK_ABORT;
	}
	
	ext2fs_unmark_block_bitmap(fs->block_map, blk);
	fs->group_desc[ext2fs_group_of_blk(fs, blk)].bg_free_blocks_count++;
	fs->super->s_free_blocks_count++;
	
	return 0;
}
		
/*
 * This function releases an inode.  Returns 1 if an inconsistency was
 * found.
 */
static int release_inode_blocks(e2fsck_t ctx, ino_t ino, char* block_buf,
				struct problem_context *pctx)
{
	ext2_filsys fs = ctx->fs;
	errcode_t			retval;
	struct process_block_struct 	pb;

	pb.ino = ino;
	pb.ctx = ctx;
	pb.abort = 0;
	pb.pctx = pctx;
	retval = ext2fs_block_iterate(fs, ino, 0, block_buf,
				      release_inode_block, &pb);
	if (retval) {
		com_err("delete_file", retval,
			_("while calling ext2fs_block_iterate for inode %d"),
			ino);
		return 1;
	}
	if (pb.abort)
		return 1;

	ext2fs_mark_bb_dirty(fs);
	return 0;
}

/*
 * This function releases all of the orphan inodes.  It returns 1 if
 * it hit some error, and 0 on success.
 */
static int release_orphan_inodes(e2fsck_t ctx)
{
	ext2_filsys fs = ctx->fs;
	int group;
	ino_t	ino, next_ino;
	struct ext2_inode inode;
	struct problem_context pctx;
	char *block_buf;

	if ((ino = fs->super->s_last_orphan) == 0)
		return 0;

	/*
	 * Win or lose, we won't be using the head of the orphan inode
	 * list again.
	 */
	fs->super->s_last_orphan = 0;
	ext2fs_mark_super_dirty(fs);
	
	if ((ino < EXT2_FIRST_INODE(fs->super)) ||
	    (ino > fs->super->s_inodes_count)) {
		clear_problem_context(&pctx);
		pctx.ino;
		fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
		return 1;
	}

	block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
						    "block interate buffer");
	e2fsck_read_bitmaps(ctx);
	
	while (ino) {
		e2fsck_read_inode(ctx, ino, &inode, "delete_file");
		clear_problem_context(&pctx);
		pctx.ino = ino;
		pctx.inode = &inode;

		fix_problem(ctx, PR_0_CLEAR_ORPHAN_INODE, &pctx);

		if (inode.i_links_count) {
			fix_problem(ctx, PR_0_ORPHAN_INODE_INUSE, &pctx);
			goto abort;
		}
		next_ino = inode.i_dtime;
		if (next_ino &&
		    ((ino < EXT2_FIRST_INODE(fs->super)) ||
		     (ino > fs->super->s_inodes_count))) {
			fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
			goto abort;
		}

		if (release_inode_blocks(ctx, ino, block_buf, &pctx))
			goto abort;
		
		inode.i_dtime = time(0);
		e2fsck_write_inode(ctx, ino, &inode, "delete_file");

		ext2fs_unmark_inode_bitmap(fs->inode_map, ino);
		ext2fs_mark_ib_dirty(fs);
		group = ext2fs_group_of_ino(fs, ino);
		fs->group_desc[group].bg_free_inodes_count++;
		fs->super->s_free_inodes_count++;
		if (LINUX_S_ISDIR(inode.i_mode))
			fs->group_desc[group].bg_used_dirs_count--;
		
		ino = next_ino;
	}
	return 0;
abort:
	ext2fs_free_mem((void **) &block_buf);
	return 1;
}


void check_super_block(e2fsck_t ctx)
{
	ext2_filsys fs = ctx->fs;
	blk_t	first_block, last_block;
	struct ext2fs_sb *s = (struct ext2fs_sb *) fs->super;
	blk_t	blocks_per_group = fs->super->s_blocks_per_group;
	int	inodes_per_block;
	dgrp_t	i;
	blk_t	should_be;
	struct problem_context	pctx;
	
	inodes_per_block = (EXT2_INODE_SIZE(fs->super) + 
			    EXT2_BLOCK_SIZE(fs->super) - 1) /
				    EXT2_BLOCK_SIZE(fs->super);

	ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
		 sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap");
	ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
		 sizeof(int) * fs->group_desc_count, "invalid_block_bitmap");
	ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx,
		sizeof(int) * fs->group_desc_count, "invalid_inode_table");
		
	clear_problem_context(&pctx);

	/*
	 * Verify the super block constants...
	 */
	check_super_value(ctx, "inodes_count", s->s_inodes_count,
			  MIN_CHECK, 1, 0);
	check_super_value(ctx, "blocks_count", s->s_blocks_count,
			  MIN_CHECK, 1, 0);
	check_super_value(ctx, "first_data_block", s->s_first_data_block,
			  MAX_CHECK, 0, s->s_blocks_count);
	check_super_value(ctx, "log_frag_size", s->s_log_frag_size,
			  MAX_CHECK, 0, 2);
	check_super_value(ctx, "log_block_size", s->s_log_block_size,
			  MIN_CHECK | MAX_CHECK, s->s_log_frag_size,
			  2);
	check_super_value(ctx, "frags_per_group", s->s_frags_per_group,
			  MIN_CHECK | MAX_CHECK, 1, 8 * EXT2_BLOCK_SIZE(s));
	check_super_value(ctx, "blocks_per_group", s->s_blocks_per_group,
			  MIN_CHECK | MAX_CHECK, 1, 8 * EXT2_BLOCK_SIZE(s));
	check_super_value(ctx, "inodes_per_group", s->s_inodes_per_group,
			  MIN_CHECK | MAX_CHECK, 1,
			  inodes_per_block * blocks_per_group);
	check_super_value(ctx, "r_blocks_count", s->s_r_blocks_count,
			  MAX_CHECK, 0, s->s_blocks_count);

	if (!ctx->num_blocks) {
		pctx.errcode = e2fsck_get_device_size(ctx);
		if (pctx.errcode && pctx.errcode != EXT2_ET_UNIMPLEMENTED) {
			fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
			ctx->flags |= E2F_FLAG_ABORT;
			return;
		}
		if ((pctx.errcode != EXT2_ET_UNIMPLEMENTED) &&
		    (ctx->num_blocks < s->s_blocks_count)) {
			pctx.blk = s->s_blocks_count;
			pctx.blk2 = ctx->num_blocks;
			if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) {
				ctx->flags |= E2F_FLAG_ABORT;
				return;
			}
		}
	}

	if (s->s_log_block_size != s->s_log_frag_size) {
		pctx.blk = EXT2_BLOCK_SIZE(s);
		pctx.blk2 = EXT2_FRAG_SIZE(s);
		fix_problem(ctx, PR_0_NO_FRAGMENTS, &pctx);
		ctx->flags |= E2F_FLAG_ABORT;
		return;
	}

	should_be = s->s_frags_per_group >>
		(s->s_log_block_size - s->s_log_frag_size);		
	if (s->s_blocks_per_group != should_be) {
		pctx.blk = s->s_blocks_per_group;
		pctx.blk2 = should_be;
		fix_problem(ctx, PR_0_BLOCKS_PER_GROUP, &pctx);
		ctx->flags |= E2F_FLAG_ABORT;
		return;
	}

	should_be = (s->s_log_block_size == 0) ? 1 : 0;
	if (s->s_first_data_block != should_be) {
		pctx.blk = s->s_first_data_block;
		pctx.blk2 = should_be;
		fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx);
		ctx->flags |= E2F_FLAG_ABORT;
		return;
	}

	should_be = s->s_inodes_per_group * fs->group_desc_count;
	if (s->s_inodes_count != should_be) {
		pctx.ino = s->s_inodes_count;
		pctx.ino2 = should_be;
		if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) {
			s->s_inodes_count = should_be;
			ext2fs_mark_super_dirty(fs);
		}
	}

	/*
	 * Verify the group descriptors....
	 */
	first_block =  fs->super->s_first_data_block;
	last_block = first_block + blocks_per_group;

	for (i = 0; i < fs->group_desc_count; i++) {
		pctx.group = i;
		
		if (i == fs->group_desc_count - 1)
			last_block = fs->super->s_blocks_count;
		if ((fs->group_desc[i].bg_block_bitmap < first_block) ||
		    (fs->group_desc[i].bg_block_bitmap >= last_block)) {
			pctx.blk = fs->group_desc[i].bg_block_bitmap;
			if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx)) {
				fs->group_desc[i].bg_block_bitmap = 0;
				ctx->invalid_block_bitmap_flag[i]++;
				ctx->invalid_bitmaps++;
			}
		}
		if ((fs->group_desc[i].bg_inode_bitmap < first_block) ||
		    (fs->group_desc[i].bg_inode_bitmap >= last_block)) {
			pctx.blk = fs->group_desc[i].bg_inode_bitmap;
			if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx)) {
				fs->group_desc[i].bg_inode_bitmap = 0;
				ctx->invalid_inode_bitmap_flag[i]++;
				ctx->invalid_bitmaps++;
			}
		}
		if ((fs->group_desc[i].bg_inode_table < first_block) ||
		    ((fs->group_desc[i].bg_inode_table +
		      fs->inode_blocks_per_group - 1) >= last_block)) {
			pctx.blk = fs->group_desc[i].bg_inode_table;
			if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx)) {
				fs->group_desc[i].bg_inode_table = 0;
				ctx->invalid_inode_table_flag[i]++;
				ctx->invalid_bitmaps++;
			}
		}
		first_block += fs->super->s_blocks_per_group;
		last_block += fs->super->s_blocks_per_group;
	}
	/*
	 * If we have invalid bitmaps, set the error state of the
	 * filesystem.
	 */
	if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
		fs->super->s_state &= ~EXT2_VALID_FS;
		ext2fs_mark_super_dirty(fs);
	}

	clear_problem_context(&pctx);
	
#ifndef EXT2_SKIP_UUID
	/*
	 * If the UUID field isn't assigned, assign it.
	 */
	if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(s->s_uuid)) {
		if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
			uuid_generate(s->s_uuid);
			ext2fs_mark_super_dirty(fs);
		}
	}
#endif
	
	/*
	 * For the Hurd, check to see if the filetype option is set,
	 * since it doesn't support it.
	 */
	if (!(ctx->options & E2F_OPT_READONLY) &&
	    fs->super->s_creator_os == EXT2_OS_HURD &&
	    (fs->super->s_feature_incompat &
	     EXT2_FEATURE_INCOMPAT_FILETYPE)) {
		if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
			fs->super->s_feature_incompat &=
				~EXT2_FEATURE_INCOMPAT_FILETYPE;
			ext2fs_mark_super_dirty(fs);

		}
	}

	/*
	 * Clean up any orphan inodes, if present.
	 */
	if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
		fs->super->s_state &= ~EXT2_VALID_FS;
		ext2fs_mark_super_dirty(ctx->fs);
	}

	return;
}
Commit	Line	Data
1b6bf175 TT	1	/*
	2	* e2fsck.c - superblock checks
	3	*
	4	* Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
	5	*
	6	* %Begin-Header%
	7	* This file may be redistributed under the terms of the GNU Public
	8	* License.
	9	* %End-Header%
	10	*/
	11
1b6bf175 TT	12	#ifdef HAVE_ERRNO_H
	13	#include <errno.h>
	14	#endif
1b6bf175	15
54be2ccc	16	#ifndef EXT2_SKIP_UUID
1b6bf175	17	#include "uuid/uuid.h"
54be2ccc	18	#endif
1b6bf175 TT	19	#include "e2fsck.h"
1b6bf175 TT	20	#include "problem.h"
1b6bf175 TT	21
	22	#define MIN_CHECK 1
	23	#define MAX_CHECK 2
	24
	25	static void check_super_value(e2fsck_t ctx, const char *descr,
	26	unsigned long value, int flags,
7f813ba3	27	unsigned long min_val, unsigned long max_val)
1b6bf175 TT	28	{
	29	struct problem_context pctx;
	30
7f813ba3 TT	31	if (((flags & MIN_CHECK) && (value < min_val)) \|\|
7f813ba3 TT	32	((flags & MAX_CHECK) && (value > max_val))) {
1b6bf175 TT	33	clear_problem_context(&pctx);
	34	pctx.num = value;
	35	pctx.str = descr;
	36	fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
08b21301	37	ctx->flags \|= E2F_FLAG_ABORT; /* never get here! */
1b6bf175 TT	38	}
	39	}
	40
4313932c TT	41	/*
	42	* This routine may get stubbed out in special compilations of the
	43	* e2fsck code..
	44	*/
	45	#ifndef EXT2_SPECIAL_DEVICE_SIZE
	46	errcode_t e2fsck_get_device_size(e2fsck_t ctx)
	47	{
	48	return (ext2fs_get_device_size(ctx->filesystem_name,
	49	EXT2_BLOCK_SIZE(ctx->fs->super),
	50	&ctx->num_blocks));
	51	}
4313932c TT	52	#endif
4313932c TT	53
80bfaa3e TT	54	/*
	55	* helper function to release an inode
	56	*/
	57	struct process_block_struct {
	58	ino_t ino;
	59	e2fsck_t ctx;
	60	struct problem_context *pctx;
	61	int abort;
	62	};
	63
	64	static int release_inode_block(ext2_filsys fs,
	65	blk_t *block_nr,
	66	int blockcnt,
	67	void *priv_data)
	68	{
	69	struct process_block_struct *pb;
	70	e2fsck_t ctx;
	71	struct problem_context *pctx;
	72	blk_t blk = *block_nr;
	73
	74	pb = (struct process_block_struct *) priv_data;
	75	ctx = pb->ctx;
	76	pctx = pb->pctx;
	77
	78	pctx->blk = blk;
	79	pctx->blkcount = blockcnt;
	80
	81	if (HOLE_BLKADDR(blk))
	82	return 0;
	83
	84	if ((blk < fs->super->s_first_data_block) \|\|
	85	(blk >= fs->super->s_blocks_count)) {
	86	fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM, pctx);
	87	pb->abort = 1;
	88	return BLOCK_ABORT;
	89	}
	90
	91	if (!ext2fs_test_block_bitmap(fs->block_map, blk)) {
	92	fix_problem(ctx, PR_0_ORPHAN_ALREADY_CLEARED_BLOCK, pctx);
	93	pb->abort = 1;
	94	return BLOCK_ABORT;
	95	}
	96
	97	ext2fs_unmark_block_bitmap(fs->block_map, blk);
ecf1b776 TT	98	fs->group_desc[ext2fs_group_of_blk(fs, blk)].bg_free_blocks_count++;
ecf1b776 TT	99	fs->super->s_free_blocks_count++;
80bfaa3e TT	100
	101	return 0;
	102	}
	103
	104	/*
	105	* This function releases an inode. Returns 1 if an inconsistency was
	106	* found.
	107	*/
	108	static int release_inode_blocks(e2fsck_t ctx, ino_t ino, char* block_buf,
	109	struct problem_context *pctx)
	110	{
	111	ext2_filsys fs = ctx->fs;
	112	errcode_t retval;
	113	struct process_block_struct pb;
	114
	115	pb.ino = ino;
	116	pb.ctx = ctx;
	117	pb.abort = 0;
	118	pb.pctx = pctx;
	119	retval = ext2fs_block_iterate(fs, ino, 0, block_buf,
	120	release_inode_block, &pb);
	121	if (retval) {
	122	com_err("delete_file", retval,
	123	_("while calling ext2fs_block_iterate for inode %d"),
	124	ino);
	125	return 1;
	126	}
	127	if (pb.abort)
	128	return 1;
	129
80bfaa3e TT	130	ext2fs_mark_bb_dirty(fs);
	131	return 0;
	132	}
	133
	134	/*
	135	* This function releases all of the orphan inodes. It returns 1 if
	136	* it hit some error, and 0 on success.
	137	*/
	138	static int release_orphan_inodes(e2fsck_t ctx)
	139	{
	140	ext2_filsys fs = ctx->fs;
ecf1b776	141	int group;
80bfaa3e TT	142	ino_t ino, next_ino;
	143	struct ext2_inode inode;
	144	struct problem_context pctx;
	145	char *block_buf;
	146
	147	if ((ino = fs->super->s_last_orphan) == 0)
	148	return 0;
	149
25c63ba0 TT	150	/*
	151	* Win or lose, we won't be using the head of the orphan inode
	152	* list again.
	153	*/
	154	fs->super->s_last_orphan = 0;
	155	ext2fs_mark_super_dirty(fs);
	156
80bfaa3e TT	157	if ((ino < EXT2_FIRST_INODE(fs->super)) \|\|
	158	(ino > fs->super->s_inodes_count)) {
	159	clear_problem_context(&pctx);
	160	pctx.ino;
	161	fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
	162	return 1;
	163	}
	164
	165	block_buf = (char ) e2fsck_allocate_memory(ctx, fs->blocksize 3,
	166	"block interate buffer");
	167	e2fsck_read_bitmaps(ctx);
	168
	169	while (ino) {
80bfaa3e TT	170	e2fsck_read_inode(ctx, ino, &inode, "delete_file");
80bfaa3e TT	171	clear_problem_context(&pctx);
ecf1b776	172	pctx.ino = ino;
80bfaa3e TT	173	pctx.inode = &inode;
80bfaa3e TT	174
ecf1b776 TT	175	fix_problem(ctx, PR_0_CLEAR_ORPHAN_INODE, &pctx);
ecf1b776 TT	176
80bfaa3e TT	177	if (inode.i_links_count) {
	178	fix_problem(ctx, PR_0_ORPHAN_INODE_INUSE, &pctx);
	179	goto abort;
	180	}
	181	next_ino = inode.i_dtime;
	182	if (next_ino &&
	183	((ino < EXT2_FIRST_INODE(fs->super)) \|\|
	184	(ino > fs->super->s_inodes_count))) {
	185	fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
	186	goto abort;
	187	}
	188
	189	if (release_inode_blocks(ctx, ino, block_buf, &pctx))
	190	goto abort;
	191
	192	inode.i_dtime = time(0);
	193	e2fsck_write_inode(ctx, ino, &inode, "delete_file");
ecf1b776 TT	194
	195	ext2fs_unmark_inode_bitmap(fs->inode_map, ino);
	196	ext2fs_mark_ib_dirty(fs);
	197	group = ext2fs_group_of_ino(fs, ino);
	198	fs->group_desc[group].bg_free_inodes_count++;
	199	fs->super->s_free_inodes_count++;
	200	if (LINUX_S_ISDIR(inode.i_mode))
	201	fs->group_desc[group].bg_used_dirs_count--;
	202
80bfaa3e TT	203	ino = next_ino;
	204	}
	205	return 0;
	206	abort:
	207	ext2fs_free_mem((void **) &block_buf);
	208	return 1;
	209	}
	210
	211
1b6bf175 TT	212	void check_super_block(e2fsck_t ctx)
	213	{
	214	ext2_filsys fs = ctx->fs;
	215	blk_t first_block, last_block;
	216	struct ext2fs_sb s = (struct ext2fs_sb ) fs->super;
	217	blk_t blocks_per_group = fs->super->s_blocks_per_group;
78cf0547	218	int inodes_per_block;
7f813ba3	219	dgrp_t i;
1b6bf175 TT	220	blk_t should_be;
1b6bf175 TT	221	struct problem_context pctx;
78cf0547 TT	222
	223	inodes_per_block = (EXT2_INODE_SIZE(fs->super) +
	224	EXT2_BLOCK_SIZE(fs->super) - 1) /
	225	EXT2_BLOCK_SIZE(fs->super);
1b6bf175	226
54dc7ca2	227	ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
f8188fff	228	sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap");
54dc7ca2	229	ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
f8188fff	230	sizeof(int) * fs->group_desc_count, "invalid_block_bitmap");
54dc7ca2	231	ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx,
f8188fff	232	sizeof(int) * fs->group_desc_count, "invalid_inode_table");
1b6bf175 TT	233
	234	clear_problem_context(&pctx);
	235
	236	/*
	237	* Verify the super block constants...
	238	*/
	239	check_super_value(ctx, "inodes_count", s->s_inodes_count,
	240	MIN_CHECK, 1, 0);
	241	check_super_value(ctx, "blocks_count", s->s_blocks_count,
	242	MIN_CHECK, 1, 0);
	243	check_super_value(ctx, "first_data_block", s->s_first_data_block,
	244	MAX_CHECK, 0, s->s_blocks_count);
	245	check_super_value(ctx, "log_frag_size", s->s_log_frag_size,
	246	MAX_CHECK, 0, 2);
	247	check_super_value(ctx, "log_block_size", s->s_log_block_size,
	248	MIN_CHECK \| MAX_CHECK, s->s_log_frag_size,
	249	2);
	250	check_super_value(ctx, "frags_per_group", s->s_frags_per_group,
	251	MIN_CHECK \| MAX_CHECK, 1, 8 * EXT2_BLOCK_SIZE(s));
	252	check_super_value(ctx, "blocks_per_group", s->s_blocks_per_group,
	253	MIN_CHECK \| MAX_CHECK, 1, 8 * EXT2_BLOCK_SIZE(s));
	254	check_super_value(ctx, "inodes_per_group", s->s_inodes_per_group,
78cf0547 TT	255	MIN_CHECK \| MAX_CHECK, 1,
78cf0547 TT	256	inodes_per_block * blocks_per_group);
1b6bf175 TT	257	check_super_value(ctx, "r_blocks_count", s->s_r_blocks_count,
	258	MAX_CHECK, 0, s->s_blocks_count);
	259
f8188fff	260	if (!ctx->num_blocks) {
4313932c	261	pctx.errcode = e2fsck_get_device_size(ctx);
f8188fff TT	262	if (pctx.errcode && pctx.errcode != EXT2_ET_UNIMPLEMENTED) {
f8188fff TT	263	fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
08b21301 TT	264	ctx->flags \|= E2F_FLAG_ABORT;
	265	return;
	266	}
f8188fff TT	267	if ((pctx.errcode != EXT2_ET_UNIMPLEMENTED) &&
	268	(ctx->num_blocks < s->s_blocks_count)) {
	269	pctx.blk = s->s_blocks_count;
	270	pctx.blk2 = ctx->num_blocks;
	271	if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) {
	272	ctx->flags \|= E2F_FLAG_ABORT;
	273	return;
	274	}
	275	}
1b6bf175 TT	276	}
	277
	278	if (s->s_log_block_size != s->s_log_frag_size) {
	279	pctx.blk = EXT2_BLOCK_SIZE(s);
	280	pctx.blk2 = EXT2_FRAG_SIZE(s);
	281	fix_problem(ctx, PR_0_NO_FRAGMENTS, &pctx);
08b21301 TT	282	ctx->flags \|= E2F_FLAG_ABORT;
08b21301 TT	283	return;
1b6bf175 TT	284	}
1b6bf175 TT	285
17dba281 TT	286	should_be = s->s_frags_per_group >>
17dba281 TT	287	(s->s_log_block_size - s->s_log_frag_size);
1b6bf175 TT	288	if (s->s_blocks_per_group != should_be) {
	289	pctx.blk = s->s_blocks_per_group;
	290	pctx.blk2 = should_be;
	291	fix_problem(ctx, PR_0_BLOCKS_PER_GROUP, &pctx);
08b21301 TT	292	ctx->flags \|= E2F_FLAG_ABORT;
08b21301 TT	293	return;
1b6bf175 TT	294	}
	295
	296	should_be = (s->s_log_block_size == 0) ? 1 : 0;
	297	if (s->s_first_data_block != should_be) {
	298	pctx.blk = s->s_first_data_block;
	299	pctx.blk2 = should_be;
	300	fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx);
08b21301 TT	301	ctx->flags \|= E2F_FLAG_ABORT;
08b21301 TT	302	return;
1b6bf175 TT	303	}
1b6bf175 TT	304
d4b0ce03 TT	305	should_be = s->s_inodes_per_group * fs->group_desc_count;
	306	if (s->s_inodes_count != should_be) {
	307	pctx.ino = s->s_inodes_count;
	308	pctx.ino2 = should_be;
	309	if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) {
	310	s->s_inodes_count = should_be;
	311	ext2fs_mark_super_dirty(fs);
	312	}
	313	}
	314
1b6bf175 TT	315	/*
	316	* Verify the group descriptors....
	317	*/
	318	first_block = fs->super->s_first_data_block;
	319	last_block = first_block + blocks_per_group;
	320
	321	for (i = 0; i < fs->group_desc_count; i++) {
	322	pctx.group = i;
	323
	324	if (i == fs->group_desc_count - 1)
	325	last_block = fs->super->s_blocks_count;
	326	if ((fs->group_desc[i].bg_block_bitmap < first_block) \|\|
	327	(fs->group_desc[i].bg_block_bitmap >= last_block)) {
	328	pctx.blk = fs->group_desc[i].bg_block_bitmap;
	329	if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx)) {
	330	fs->group_desc[i].bg_block_bitmap = 0;
	331	ctx->invalid_block_bitmap_flag[i]++;
	332	ctx->invalid_bitmaps++;
	333	}
	334	}
	335	if ((fs->group_desc[i].bg_inode_bitmap < first_block) \|\|
	336	(fs->group_desc[i].bg_inode_bitmap >= last_block)) {
	337	pctx.blk = fs->group_desc[i].bg_inode_bitmap;
	338	if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx)) {
	339	fs->group_desc[i].bg_inode_bitmap = 0;
	340	ctx->invalid_inode_bitmap_flag[i]++;
	341	ctx->invalid_bitmaps++;
	342	}
	343	}
	344	if ((fs->group_desc[i].bg_inode_table < first_block) \|\|
	345	((fs->group_desc[i].bg_inode_table +
	346	fs->inode_blocks_per_group - 1) >= last_block)) {
	347	pctx.blk = fs->group_desc[i].bg_inode_table;
	348	if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx)) {
	349	fs->group_desc[i].bg_inode_table = 0;
	350	ctx->invalid_inode_table_flag[i]++;
	351	ctx->invalid_bitmaps++;
	352	}
	353	}
	354	first_block += fs->super->s_blocks_per_group;
	355	last_block += fs->super->s_blocks_per_group;
	356	}
	357	/*
	358	* If we have invalid bitmaps, set the error state of the
	359	* filesystem.
	360	*/
	361	if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
	362	fs->super->s_state &= ~EXT2_VALID_FS;
	363	ext2fs_mark_super_dirty(fs);
	364	}
	365
4ea0a110 TT	366	clear_problem_context(&pctx);
4ea0a110 TT	367
54be2ccc	368	#ifndef EXT2_SKIP_UUID
1b6bf175 TT	369	/*
	370	* If the UUID field isn't assigned, assign it.
	371	*/
	372	if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(s->s_uuid)) {
1b6bf175 TT	373	if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
	374	uuid_generate(s->s_uuid);
	375	ext2fs_mark_super_dirty(fs);
	376	}
	377	}
54be2ccc	378	#endif
4ea0a110 TT	379
	380	/*
	381	* For the Hurd, check to see if the filetype option is set,
	382	* since it doesn't support it.
	383	*/
80bfaa3e TT	384	if (!(ctx->options & E2F_OPT_READONLY) &&
80bfaa3e TT	385	fs->super->s_creator_os == EXT2_OS_HURD &&
4ea0a110 TT	386	(fs->super->s_feature_incompat &
	387	EXT2_FEATURE_INCOMPAT_FILETYPE)) {
	388	if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
	389	fs->super->s_feature_incompat &=
	390	~EXT2_FEATURE_INCOMPAT_FILETYPE;
	391	ext2fs_mark_super_dirty(fs);
	392
	393	}
	394	}
80bfaa3e TT	395
	396	/*
	397	* Clean up any orphan inodes, if present.
	398	*/
	399	if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
	400	fs->super->s_state &= ~EXT2_VALID_FS;
	401	ext2fs_mark_super_dirty(ctx->fs);
	402	}
	403
1b6bf175 TT	404	return;
1b6bf175 TT	405	}
80bfaa3e TT	406
80bfaa3e TT	407