1/*
2 *  linux/include/linux/ext2_fs_sb.h
3 *
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
8 *
9 *  from
10 *
11 *  linux/include/linux/minix_fs_sb.h
12 *
13 *  Copyright (C) 1991, 1992  Linus Torvalds
14 */
15
16#ifndef _LINUX_EXT2_FS_SB
17#define _LINUX_EXT2_FS_SB
18
19/*
20 * The following is not needed anymore since the descriptors buffer
21 * heads are now dynamically allocated
22 */
23/* #define EXT2_MAX_GROUP_DESC	8 */
24
25#define EXT2_MAX_GROUP_LOADED	8
26
27/*
28 * second extended-fs super-block data in memory
29 */
30struct ext2_sb_info {
31	unsigned long s_frag_size;	/* Size of a fragment in bytes */
32	unsigned long s_frags_per_block;/* Number of fragments per block */
33	unsigned long s_inodes_per_block;/* Number of inodes per block */
34	unsigned long s_frags_per_group;/* Number of fragments in a group */
35	unsigned long s_blocks_per_group;/* Number of blocks in a group */
36	unsigned long s_inodes_per_group;/* Number of inodes in a group */
37	unsigned long s_itb_per_group;	/* Number of inode table blocks per group */
38	unsigned long s_gdb_count;	/* Number of group descriptor blocks */
39	unsigned long s_desc_per_block;	/* Number of group descriptors per block */
40	unsigned long s_groups_count;	/* Number of groups in the fs */
41	struct buffer_head * s_sbh;	/* Buffer containing the super block */
42	struct ext2_super_block * s_es;	/* Pointer to the super block in the buffer */
43	struct buffer_head ** s_group_desc;
44	unsigned short s_loaded_inode_bitmaps;
45	unsigned short s_loaded_block_bitmaps;
46	unsigned long s_inode_bitmap_number[EXT2_MAX_GROUP_LOADED];
47	struct buffer_head * s_inode_bitmap[EXT2_MAX_GROUP_LOADED];
48	unsigned long s_block_bitmap_number[EXT2_MAX_GROUP_LOADED];
49	struct buffer_head * s_block_bitmap[EXT2_MAX_GROUP_LOADED];
50	unsigned long  s_mount_opt;
51	uid_t s_resuid;
52	gid_t s_resgid;
53	unsigned short s_mount_state;
54	unsigned short s_pad;
55	int s_addr_per_block_bits;
56	int s_desc_per_block_bits;
57	int s_inode_size;
58	int s_first_ino;
59};
60
61#endif	/* _LINUX_EXT2_FS_SB */
62