| | 1 | /* |
| | 2 | * modified for EXT2FS support in Lites 1.1 |
| | 3 | * |
| | 4 | * Aug 1995, Godmar Back (gback@cs.utah.edu) |
| | 5 | * University of Utah, Department of Computer Science |
| | 6 | */ |
| | 7 | /* |
| | 8 | * linux/include/linux/ext2_fs_sb.h |
| | 9 | * |
| | 10 | * Copyright (C) 1992, 1993, 1994, 1995 |
| | 11 | * Remy Card (card@masi.ibp.fr) |
| | 12 | * Laboratoire MASI - Institut Blaise Pascal |
| | 13 | * Universite Pierre et Marie Curie (Paris VI) |
| | 14 | * |
| | 15 | * from |
| | 16 | * |
| | 17 | * linux/include/linux/minix_fs_sb.h |
| | 18 | * |
| | 19 | * Copyright (C) 1991, 1992 Linus Torvalds |
| | 20 | */ |
| | 21 | |
| | 22 | #ifndef _LINUX_EXT2_FS_SB |
| | 23 | #define _LINUX_EXT2_FS_SB |
| | 24 | |
| | 25 | /* |
| | 26 | * The following is not needed anymore since the descriptors buffer |
| | 27 | * heads are now dynamically allocated |
| | 28 | */ |
| | 29 | /* #define EXT2_MAX_GROUP_DESC 8 */ |
| | 30 | |
| | 31 | #define EXT2_MAX_GROUP_LOADED 8 |
| | 32 | |
| | 33 | #define buffer_head buf |
| | 34 | #define MAXMNTLEN 512 |
| | 35 | |
| | 36 | /* |
| | 37 | * second extended-fs super-block data in memory |
| | 38 | */ |
| | 39 | struct ext2_sb_info { |
| | 40 | unsigned long s_frag_size; /* Size of a fragment in bytes */ |
| | 41 | unsigned long s_frags_per_block;/* Number of fragments per block */ |
| | 42 | unsigned long s_inodes_per_block;/* Number of inodes per block */ |
| | 43 | unsigned long s_frags_per_group;/* Number of fragments in a group */ |
| | 44 | unsigned long s_blocks_per_group;/* Number of blocks in a group */ |
| | 45 | unsigned long s_inodes_per_group;/* Number of inodes in a group */ |
| | 46 | unsigned long s_itb_per_group; /* Number of inode table blocks per group */ |
| | 47 | unsigned long s_db_per_group; /* Number of descriptor blocks per group */ |
| | 48 | unsigned long s_desc_per_block; /* Number of group descriptors per block */ |
| | 49 | unsigned long s_groups_count; /* Number of groups in the fs */ |
| | 50 | struct buffer_head * s_sbh; /* Buffer containing the super block */ |
| | 51 | struct ext2_super_block * s_es; /* Pointer to the super block in the buffer */ |
| | 52 | struct buffer_head ** s_group_desc; |
| | 53 | unsigned short s_loaded_inode_bitmaps; |
| | 54 | unsigned short s_loaded_block_bitmaps; |
| | 55 | unsigned long s_inode_bitmap_number[EXT2_MAX_GROUP_LOADED]; |
| | 56 | struct buffer_head * s_inode_bitmap[EXT2_MAX_GROUP_LOADED]; |
| | 57 | unsigned long s_block_bitmap_number[EXT2_MAX_GROUP_LOADED]; |
| | 58 | struct buffer_head * s_block_bitmap[EXT2_MAX_GROUP_LOADED]; |
| | 59 | int s_rename_lock; |
| | 60 | unsigned long s_mount_opt; |
| | 61 | #ifdef notyet |
| | 62 | unsigned short s_resuid; |
| | 63 | unsigned short s_resgid; |
| | 64 | #endif |
| | 65 | unsigned short s_inode_size; |
| | 66 | unsigned int s_first_ino; |
| | 67 | unsigned short s_mount_state; |
| | 68 | /* |
| | 69 | stuff that FFS keeps in its super block or that linux |
| | 70 | has in its non-ext2 specific super block and which is |
| | 71 | generally considered useful |
| | 72 | */ |
| | 73 | unsigned long s_blocksize; |
| | 74 | unsigned long s_blocksize_bits; |
| | 75 | unsigned int s_bshift; /* = log2(s_blocksize) */ |
| | 76 | quad_t s_qbmask; /* = s_blocksize - 1 */ |
| | 77 | unsigned int s_fsbtodb; /* shift to get disk block */ |
| | 78 | char s_rd_only; /* read-only */ |
| | 79 | char s_dirt; /* fs modified flag */ |
| | 80 | char s_wasvalid; /* valid at mount time */ |
| | 81 | |
| | 82 | char fs_fsmnt[MAXMNTLEN]; /* name mounted on */ |
| | 83 | }; |
| | 84 | |
| | 85 | #endif /* _LINUX_EXT2_FS_SB */ |
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