2 * linux/include/linux/ext3_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_EXT3_FS_SB
17 #define _LINUX_EXT3_FS_SB
20 #include <linux/timer.h>
21 #include <linux/wait.h>
25 * The following is not needed anymore since the descriptors buffer
26 * heads are now dynamically allocated
28 /* #define EXT3_MAX_GROUP_DESC 8 */
30 #define EXT3_MAX_GROUP_LOADED 8
33 * third extended-fs super-block data in memory
36 unsigned long s_frag_size; /* Size of a fragment in bytes */
37 unsigned long s_frags_per_block;/* Number of fragments per block */
38 unsigned long s_inodes_per_block;/* Number of inodes per block */
39 unsigned long s_frags_per_group;/* Number of fragments in a group */
40 unsigned long s_blocks_per_group;/* Number of blocks in a group */
41 unsigned long s_inodes_per_group;/* Number of inodes in a group */
42 unsigned long s_itb_per_group; /* Number of inode table blocks per group */
43 unsigned long s_gdb_count; /* Number of group descriptor blocks */
44 unsigned long s_desc_per_block; /* Number of group descriptors per block */
45 unsigned long s_groups_count; /* Number of groups in the fs */
46 struct buffer_head * s_sbh; /* Buffer containing the super block */
47 struct ext3_super_block * s_es; /* Pointer to the super block in the buffer */
48 struct buffer_head ** s_group_desc;
49 unsigned short s_loaded_inode_bitmaps;
50 unsigned short s_loaded_block_bitmaps;
51 unsigned long s_inode_bitmap_number[EXT3_MAX_GROUP_LOADED];
52 struct buffer_head * s_inode_bitmap[EXT3_MAX_GROUP_LOADED];
53 unsigned long s_block_bitmap_number[EXT3_MAX_GROUP_LOADED];
54 struct buffer_head * s_block_bitmap[EXT3_MAX_GROUP_LOADED];
55 unsigned long s_mount_opt;
58 unsigned short s_mount_state;
60 int s_addr_per_block_bits;
61 int s_desc_per_block_bits;
64 u32 s_next_generation;
67 struct inode * s_journal_inode;
68 struct journal_s * s_journal;
69 struct list_head s_orphan;
70 unsigned long s_commit_interval;
71 struct block_device *journal_bdev;
72 #ifdef CONFIG_JBD_DEBUG
73 struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */
74 wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */
78 #endif /* _LINUX_EXT3_FS_SB */