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 */
30 struct 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
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