87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
/*
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* check_uninit.c --- check_block_uninit() and check_inode_uninit() functions
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* copy-pasted from e2fsprogs: lib/ext2fs/alloc.c
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*
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* Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Library
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* General Public License, version 2.
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* %End-Header%
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*/
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#include "check_uninit.h"
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/*
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* Check for uninit block bitmaps and deal with them appropriately
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*/
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void check_block_uninit(ext2_filsys fs, ext2fs_block_bitmap map, dgrp_t group)
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{
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blk_t i;
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blk64_t blk, super_blk, old_desc_blk, new_desc_blk;
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int old_desc_blocks;
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if (!(EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
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EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) ||
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!(ext2fs_bg_flags_test(fs, group, EXT2_BG_BLOCK_UNINIT)))
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return;
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blk = (group * fs->super->s_blocks_per_group) +
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fs->super->s_first_data_block;
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ext2fs_super_and_bgd_loc2(fs, group, &super_blk,
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&old_desc_blk, &new_desc_blk, 0);
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if (fs->super->s_feature_incompat &
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EXT2_FEATURE_INCOMPAT_META_BG)
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old_desc_blocks = fs->super->s_first_meta_bg;
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else
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old_desc_blocks = fs->desc_blocks + fs->super->s_reserved_gdt_blocks;
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for (i=0; i < fs->super->s_blocks_per_group; i++, blk++)
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ext2fs_fast_unmark_block_bitmap2(map, blk);
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blk = (group * fs->super->s_blocks_per_group) +
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fs->super->s_first_data_block;
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for (i=0; i < fs->super->s_blocks_per_group; i++, blk++) {
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if ((blk == super_blk) ||
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(old_desc_blk && old_desc_blocks &&
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(blk >= old_desc_blk) &&
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(blk < old_desc_blk + old_desc_blocks)) ||
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(new_desc_blk && (blk == new_desc_blk)) ||
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(blk == ext2fs_block_bitmap_loc(fs, group)) ||
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(blk == ext2fs_inode_bitmap_loc(fs, group)) ||
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(blk >= ext2fs_inode_table_loc(fs, group) &&
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(blk < ext2fs_inode_table_loc(fs, group)
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+ fs->inode_blocks_per_group)))
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ext2fs_fast_mark_block_bitmap2(map, blk);
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}
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ext2fs_bg_flags_clear(fs, group, EXT2_BG_BLOCK_UNINIT);
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ext2fs_group_desc_csum_set(fs, group);
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ext2fs_mark_super_dirty(fs);
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ext2fs_mark_bb_dirty(fs);
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}
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/*
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* Check for uninit inode bitmaps and deal with them appropriately
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*/
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void check_inode_uninit(ext2_filsys fs, ext2fs_inode_bitmap map, dgrp_t group)
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{
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ext2_ino_t i, ino;
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if (!(EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
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EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) ||
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!(ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)))
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return;
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ino = (group * fs->super->s_inodes_per_group) + 1;
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for (i=0; i < fs->super->s_inodes_per_group; i++, ino++)
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ext2fs_fast_unmark_inode_bitmap2(map, ino);
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ext2fs_bg_flags_clear(fs, group, EXT2_BG_INODE_UNINIT);
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ext2fs_group_desc_csum_set(fs, group);
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ext2fs_mark_ib_dirty(fs);
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ext2fs_mark_super_dirty(fs);
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check_block_uninit(fs, fs->block_map, group);
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}
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