mirror of https://github.com/vitalif/e2fsprogs
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
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/*
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* i_block.c --- Manage the i_block field for i_blocks
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*
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* Copyright (C) 2008 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 Public
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* License.
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* %End-Header%
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*/
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#include <stdio.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <time.h>
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#include <string.h>
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#if HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#if HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#include "ext2_fs.h"
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#include "ext2fs.h"
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errcode_t ext2fs_iblk_add_blocks(ext2_filsys fs, struct ext2_inode *inode,
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blk64_t num_blocks)
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{
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unsigned long long b;
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if ((fs->super->s_feature_ro_compat &
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EXT4_FEATURE_RO_COMPAT_HUGE_FILE) &&
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(inode->i_flags & EXT4_HUGE_FILE_FL)) {
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b = inode->i_blocks +
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(((long long) inode->osd2.linux2.l_i_blocks_hi) << 32);
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b += num_blocks;
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inode->i_blocks = b & 0xFFFFFFFF;
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inode->osd2.linux2.l_i_blocks_hi = b >> 32;
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} else
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inode->i_blocks += (fs->blocksize / 512) * num_blocks;
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return 0;
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}
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errcode_t ext2fs_iblk_sub_blocks(ext2_filsys fs, struct ext2_inode *inode,
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blk64_t num_blocks)
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{
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unsigned long long b;
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if ((fs->super->s_feature_ro_compat &
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EXT4_FEATURE_RO_COMPAT_HUGE_FILE) &&
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(inode->i_flags & EXT4_HUGE_FILE_FL)) {
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b = inode->i_blocks +
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(((long long) inode->osd2.linux2.l_i_blocks_hi) << 32);
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b -= num_blocks;
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inode->i_blocks = b & 0xFFFFFFFF;
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inode->osd2.linux2.l_i_blocks_hi = b >> 32;
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} else
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inode->i_blocks -= (fs->blocksize / 512) * num_blocks;
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return 0;
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}
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errcode_t ext2fs_iblk_set(ext2_filsys fs, struct ext2_inode *inode, blk64_t b)
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{
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if ((fs->super->s_feature_ro_compat &
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EXT4_FEATURE_RO_COMPAT_HUGE_FILE) &&
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(inode->i_flags & EXT4_HUGE_FILE_FL)) {
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inode->i_blocks = b & 0xFFFFFFFF;
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inode->osd2.linux2.l_i_blocks_hi = b >> 32;
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} else
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inode->i_blocks = (fs->blocksize / 512) * b;
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return 0;
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}
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