/*

 *  linux/include/linux/ext3_fs_sb.h

 *

 * Copyright (C) 1992, 1993, 1994, 1995

 * Remy Card (card@masi.ibp.fr)

 * Laboratoire MASI - Institut Blaise Pascal

 * Universite Pierre et Marie Curie (Paris VI)

 *

 *  from

 *

 *  linux/include/linux/minix_fs_sb.h

 *

 *  Copyright (C) 1991, 1992  Linus Torvalds

 */

#ifndef _LINUX_EXT3_FS_SB

#define _LINUX_EXT3_FS_SB

#ifdef __KERNEL__

#include <linux/timer.h>

#include <linux/wait.h>

#include <linux/blockgroup_lock.h>

#include <linux/percpu_counter.h>

#endif

#include <linux/rbtree.h>

/*

 * third extended-fs super-block data in memory

 */

struct ext3_sb_info {

	unsigned long s_frag_size;	/* Size of a fragment in bytes */

	unsigned long s_frags_per_block;/* Number of fragments per block */

	unsigned long s_inodes_per_block;/* Number of inodes per block */

	unsigned long s_frags_per_group;/* Number of fragments in a group */

	unsigned long s_blocks_per_group;/* Number of blocks in a group */

	unsigned long s_inodes_per_group;/* Number of inodes in a group */

	unsigned long s_itb_per_group;	/* Number of inode table blocks per group */

	unsigned long s_gdb_count;	/* Number of group descriptor blocks */

	unsigned long s_desc_per_block;	/* Number of group descriptors per block */

	unsigned long s_groups_count;	/* Number of groups in the fs */

	unsigned long s_overhead_last;  /* Last calculated overhead */

	unsigned long s_blocks_last;    /* Last seen block count */

	struct buffer_head * s_sbh;	/* Buffer containing the super block */

	struct ext3_super_block * s_es;	/* Pointer to the super block in the buffer */

	struct buffer_head ** s_group_desc;

	unsigned long  s_mount_opt;

	ext3_fsblk_t s_sb_block;

	uid_t s_resuid;

	gid_t s_resgid;

	unsigned short s_mount_state;

	unsigned short s_pad;

	int s_addr_per_block_bits;

	int s_desc_per_block_bits;

	int s_inode_size;

	int s_first_ino;

	spinlock_t s_next_gen_lock;

	u32 s_next_generation;

	u32 s_hash_seed[4];

	int s_def_hash_version;

	struct percpu_counter s_freeblocks_counter;

	struct percpu_counter s_freeinodes_counter;

	struct percpu_counter s_dirs_counter;

	struct blockgroup_lock s_blockgroup_lock;

	/* root of the per fs reservation window tree */

	spinlock_t s_rsv_window_lock;

	struct rb_root s_rsv_window_root;

	struct ext3_reserve_window_node s_rsv_window_head;

	/* Journaling */

	struct inode * s_journal_inode;

	struct journal_s * s_journal;

	struct list_head s_orphan;

	unsigned long s_commit_interval;

	struct block_device *journal_bdev;

#ifdef CONFIG_JBD_DEBUG

	struct timer_list turn_ro_timer;	/* For turning read-only (crash simulation) */

	wait_queue_head_t ro_wait_queue;	/* For people waiting for the fs to go read-only */

#endif

#ifdef CONFIG_QUOTA

	char *s_qf_names[MAXQUOTAS];		/* Names of quota files with journalled quota */

	int s_jquota_fmt;			/* Format of quota to use */

#endif

};

#endif	/* _LINUX_EXT3_FS_SB */