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