include/linux/ext2_fs_sb.h

   1 /*
   2  *  linux/include/linux/ext2_fs_sb.h
   3  *
   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)
   8  *
   9  *  from
  10  *
  11  *  linux/include/linux/minix_fs_sb.h
  12  *
  13  *  Copyright (C) 1991, 1992  Linus Torvalds
  14  */
  15
  16 #ifndef _LINUX_EXT2_FS_SB
  17 #define _LINUX_EXT2_FS_SB
  18
  19 #include <linux/blockgroup_lock.h>
  20 #include <linux/percpu_counter.h>
  21
  22 /*
  23  * second extended-fs super-block data in memory
  24  */
  25 struct ext2_sb_info {
  26         unsigned long s_frag_size;      /* Size of a fragment in bytes */
  27         unsigned long s_frags_per_block;/* Number of fragments per block */
  28         unsigned long s_inodes_per_block;/* Number of inodes per block */
  29         unsigned long s_frags_per_group;/* Number of fragments in a group */
  30         unsigned long s_blocks_per_group;/* Number of blocks in a group */
  31         unsigned long s_inodes_per_group;/* Number of inodes in a group */
  32         unsigned long s_itb_per_group;  /* Number of inode table blocks per group */
  33         unsigned long s_gdb_count;      /* Number of group descriptor blocks */
  34         unsigned long s_desc_per_block; /* Number of group descriptors per block */
  35         unsigned long s_groups_count;   /* Number of groups in the fs */
  36         unsigned long s_overhead_last;  /* Last calculated overhead */
  37         unsigned long s_blocks_last;    /* Last seen block count */
  38         struct buffer_head * s_sbh;     /* Buffer containing the super block */
  39         struct ext2_super_block * s_es; /* Pointer to the super block in the buffer */
  40         struct buffer_head ** s_group_desc;
  41         unsigned long  s_mount_opt;
  42         uid_t s_resuid;
  43         gid_t s_resgid;
  44         unsigned short s_mount_state;
  45         unsigned short s_pad;
  46         int s_addr_per_block_bits;
  47         int s_desc_per_block_bits;
  48         int s_inode_size;
  49         int s_first_ino;
  50         spinlock_t s_next_gen_lock;
  51         u32 s_next_generation;
  52         unsigned long s_dir_count;
  53         u8 *s_debts;
  54         struct percpu_counter s_freeblocks_counter;
  55         struct percpu_counter s_freeinodes_counter;
  56         struct percpu_counter s_dirs_counter;
  57         struct blockgroup_lock s_blockgroup_lock;
  58 };
  59
  60 #endif  /* _LINUX_EXT2_FS_SB */