root/include/linux/ext3_fs_sb.h

INCLUDED FROM

/*
 *  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 */