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>
22 #include <linux/blockgroup_lock.h>
23 #include <linux/percpu_counter.h>
27 * third extended-fs super-block data in memory
30 unsigned long s_frag_size; /* Size of a fragment in bytes */
31 unsigned long s_frags_per_block;/* Number of fragments per block */
32 unsigned long s_inodes_per_block;/* Number of inodes per block */
33 unsigned long s_frags_per_group;/* Number of fragments in a group */
34 unsigned long s_blocks_per_group;/* Number of blocks in a group */
35 unsigned long s_inodes_per_group;/* Number of inodes in a group */
36 unsigned long s_itb_per_group; /* Number of inode table blocks per group */
37 unsigned long s_gdb_count; /* Number of group descriptor blocks */
38 unsigned long s_desc_per_block; /* Number of group descriptors per block */
39 unsigned long s_groups_count; /* Number of groups in the fs */
40 struct buffer_head * s_sbh; /* Buffer containing the super block */
41 struct ext3_super_block * s_es; /* Pointer to the super block in the buffer */
42 struct buffer_head ** s_group_desc;
43 unsigned long s_mount_opt;
46 unsigned short s_mount_state;
48 int s_addr_per_block_bits;
49 int s_desc_per_block_bits;
52 spinlock_t s_next_gen_lock;
53 u32 s_next_generation;
55 int s_def_hash_version;
57 struct percpu_counter s_freeblocks_counter;
58 struct percpu_counter s_freeinodes_counter;
59 struct percpu_counter s_dirs_counter;
60 struct blockgroup_lock s_blockgroup_lock;
63 struct inode * s_journal_inode;
64 struct journal_s * s_journal;
65 struct list_head s_orphan;
66 unsigned long s_commit_interval;
67 struct block_device *journal_bdev;
68 #ifdef CONFIG_JBD_DEBUG
69 struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */
70 wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */
73 char *s_qf_names[MAXQUOTAS]; /* Names of quota files with journalled quota */
74 int s_jquota_fmt; /* Format of quota to use */
78 #endif /* _LINUX_EXT3_FS_SB */