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/*
* modified for EXT2FS support in Lites 1.1
*
* Aug 1995, Godmar Back (gback@cs.utah.edu)
* University of Utah, Department of Computer Science
*/
/*
* linux/include/linux/ext2_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_EXT2_FS_SB
#define _LINUX_EXT2_FS_SB
/*
* The following is not needed anymore since the descriptors buffer
* heads are now dynamically allocated
*/
/* #define EXT2_MAX_GROUP_DESC 8 */
#define EXT2_MAX_GROUP_LOADED 8
#define buffer_head buf
#define MAXMNTLEN 512
/*
* second extended-fs super-block data in memory
*/
struct ext2_sb_info {
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_inodes_per_block;/* Number of inodes per block */
unsigned long s_frags_per_group;/* Number of fragments in a group */
unsigned long s_blocks_per_group;/* Number of blocks 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_db_per_group; /* Number of descriptor blocks per group */
unsigned long s_desc_per_block; /* Number of group descriptors per block */
unsigned long s_groups_count; /* Number of groups in the fs */
struct buffer_head * s_sbh; /* Buffer containing the super block */
struct ext2_super_block * s_es; /* Pointer to the super block in the buffer */
struct buffer_head ** s_group_desc;
unsigned short s_loaded_inode_bitmaps;
unsigned short s_loaded_block_bitmaps;
unsigned long s_inode_bitmap_number[EXT2_MAX_GROUP_LOADED];
struct buffer_head * s_inode_bitmap[EXT2_MAX_GROUP_LOADED];
unsigned long s_block_bitmap_number[EXT2_MAX_GROUP_LOADED];
struct buffer_head * s_block_bitmap[EXT2_MAX_GROUP_LOADED];
int s_rename_lock;
unsigned long s_mount_opt;
unsigned short s_resuid;
unsigned short s_resgid;
unsigned short s_mount_state;
/*
stuff that FFS keeps in its super block or that linux
has in its non-ext2 specific super block and which is
generally considered useful
*/
unsigned long s_blocksize;
unsigned long s_blocksize_bits;
unsigned int s_bshift; /* = log2(s_blocksize) */
quad_t s_qbmask; /* = s_blocksize - 1 */
unsigned int s_fsbtodb; /* shift to get disk block */
char s_rd_only; /* read-only */
char s_dirt; /* fs modified flag */
char s_wasvalid; /* valid at mount time */
char fs_fsmnt[MAXMNTLEN]; /* name mounted on */
};
#endif /* _LINUX_EXT2_FS_SB */
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