2 * i_block.c --- Manage the i_block field for i_blocks
4 * Copyright (C) 2008 Theodore Ts'o.
7 * This file may be redistributed under the terms of the GNU Library
8 * General Public License, version 2.
22 #include <sys/types.h>
29 errcode_t ext2fs_iblk_add_blocks(ext2_filsys fs, struct ext2_inode *inode,
32 unsigned long long b = inode->i_blocks;
34 if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
35 b += ((long long) inode->osd2.linux2.l_i_blocks_hi) << 32;
37 if (!(fs->super->s_feature_ro_compat &
38 EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
39 !(inode->i_flags & EXT4_HUGE_FILE_FL))
40 num_blocks *= fs->blocksize / 512;
41 num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
45 if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
46 inode->osd2.linux2.l_i_blocks_hi = b >> 32;
47 else if (b > 0xFFFFFFFF)
49 inode->i_blocks = b & 0xFFFFFFFF;
53 errcode_t ext2fs_iblk_sub_blocks(ext2_filsys fs, struct ext2_inode *inode,
56 unsigned long long b = inode->i_blocks;
58 if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
59 b += ((long long) inode->osd2.linux2.l_i_blocks_hi) << 32;
61 if (!(fs->super->s_feature_ro_compat &
62 EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
63 !(inode->i_flags & EXT4_HUGE_FILE_FL))
64 num_blocks *= fs->blocksize / 512;
65 num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
72 if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
73 inode->osd2.linux2.l_i_blocks_hi = b >> 32;
74 inode->i_blocks = b & 0xFFFFFFFF;
78 errcode_t ext2fs_iblk_set(ext2_filsys fs, struct ext2_inode *inode, blk64_t b)
80 if (!(fs->super->s_feature_ro_compat &
81 EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
82 !(inode->i_flags & EXT4_HUGE_FILE_FL))
83 b *= fs->blocksize / 512;
84 b *= EXT2FS_CLUSTER_RATIO(fs);
86 inode->i_blocks = b & 0xFFFFFFFF;
87 if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
88 inode->osd2.linux2.l_i_blocks_hi = b >> 32;