ext3_fs_sb.h

Go to the documentation of this file.

/*
 *  linux/include/linux/ext3_fs_sb.h
 *
 * Copyright (C) 1992, 1993, 1994, 1995
 * Remy Card (card@masi.ibp.fr)
 * Laboratoire MASI - Institut Blaise Pascal
 * Universite Pierre et Marie Curie (Paris VI)
 *
 *  from
 *
 *  linux/include/linux/minix_fs_sb.h
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 */
 
#ifndef _LINUX_EXT3_FS_SB
#define _LINUX_EXT3_FS_SB
 
#include <linux/types.h>
#include <linux/rbtree.h>
 
/*
 * third extended-fs super-block data in memory
 */
 
struct ext3_gd {
    ext3_fsblk_t            block;
    struct ext4_group_desc *gd;
    struct buffer_head     *bh;
};
 
struct ext3_sb_info {
 
    ERESOURCE           s_gd_lock;
    struct ext3_gd     *s_gd;
 
    unsigned long s_desc_size;      /* size of group desc */
    unsigned long s_gdb_count;  /* Number of group descriptor blocks */
    unsigned long s_desc_per_block; /* Number of group descriptors per block */
    unsigned long s_inodes_per_group;/* Number of inodes in a group */
    unsigned long s_inodes_per_block;/* Number of inodes per block */
    unsigned long s_blocks_per_group;/* Number of blocks in a group */
    unsigned long s_groups_count;   /* Number of groups in the fs */
    unsigned long s_itb_per_group;  /* Number of inode table blocks per group */
 
    int s_addr_per_block_bits;
    int s_desc_per_block_bits;
 
 
#if 0
    unsigned long s_frag_size;  /* Size of a fragment in bytes */
    unsigned long s_frags_per_block;/* Number of fragments per block */
    unsigned long s_frags_per_group;/* Number of fragments in a group */
    unsigned long s_inodes_per_group;/* Number of inodes in a group */
    unsigned long s_itb_per_group;  /* Number of inode table blocks per group */
    unsigned long s_desc_per_block; /* Number of group descriptors per block */
    unsigned long s_overhead_last;  /* Last calculated overhead */
    unsigned long s_blocks_last;    /* Last seen block count */
#endif
 
    struct ext3_super_block * s_es; /* Pointer to the super block in the buffer */
 
    __le32 s_first_ino;
 
    u32 s_hash_seed[4];
    int s_def_hash_version;
};
 
int ext3_release_dir (struct inode * inode, struct file * filp);
 
#endif  /* _LINUX_EXT3_FS_SB */