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   1 /*
   2  *  linux/fs/ext4/group.h
   3  *
   4  * Copyright (C) 2007 Cluster File Systems, Inc
   5  *
   6  * Author: Andreas Dilger <adilger@clusterfs.com>
   7  */
   8
   9 #ifndef _LINUX_EXT4_GROUP_H
  10 #define _LINUX_EXT4_GROUP_H
  11
  12 extern __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 group,
  13                                    struct ext4_group_desc *gdp);
  14 extern int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 group,
  15                                        struct ext4_group_desc *gdp);
  16 struct buffer_head *read_block_bitmap(struct super_block *sb,
  17                                       unsigned int block_group);
  18 extern unsigned ext4_init_block_bitmap(struct super_block *sb,
  19                                        struct buffer_head *bh, int group,
  20                                        struct ext4_group_desc *desc);
  21 #define ext4_free_blocks_after_init(sb, group, desc)                    \
  22                 ext4_init_block_bitmap(sb, NULL, group, desc)
  23 extern unsigned ext4_init_inode_bitmap(struct super_block *sb,
  24                                        struct buffer_head *bh, int group,
  25                                        struct ext4_group_desc *desc);
  26 extern void mark_bitmap_end(int start_bit, int end_bit, char *bitmap);
  27 #endif /* _LINUX_EXT4_GROUP_H */