/*
   *  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;

  	int s_hash_unsigned;	/* 3 if hash should be signed, 0 if not */

  	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;

  	struct mutex s_orphan_lock;

  	struct mutex s_resize_lock;

  	unsigned long s_commit_interval;
  	struct block_device *journal_bdev;

  #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
  };

  static inline spinlock_t *
  sb_bgl_lock(struct ext3_sb_info *sbi, unsigned int block_group)
  {

  	return bgl_lock_ptr(sbi->s_blockgroup_lock, block_group);

  }

  #endif	/* _LINUX_EXT3_FS_SB */