2 * linux/include/linux/ext2_fs_sb.h
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)
11 * linux/include/linux/minix_fs_sb.h
13 * Copyright (C) 1991, 1992 Linus Torvalds
16 #ifndef _LINUX_EXT2_FS_SB
17 #define _LINUX_EXT2_FS_SB
20 * The following is not needed anymore since the descriptors buffer
21 * heads are now dynamically allocated
23 /* #define EXT2_MAX_GROUP_DESC 8 */
25 #define EXT2_MAX_GROUP_LOADED 8
28 * second extended-fs super-block data in memory
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_db_per_group
; /* Number of descriptor blocks per group */
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
;
53 unsigned short s_mount_state
;
55 int s_addr_per_block_bits
;
56 int s_desc_per_block_bits
;
60 int s_feature_incompat
;
61 int s_feature_ro_compat
;
64 #endif /* _LINUX_EXT2_FS_SB */