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ext2_fs_sb.h
Package: linux-2.4.20.tar.gz　[view]
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Linux-Unix program

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Unix_Linux

ext2_fs_sb.h：Code Content
  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.  */
  16. #ifndef _LINUX_EXT2_FS_SB
  17. #define _LINUX_EXT2_FS_SB
  19. /*
  20.  * The following is not needed anymore since the descriptors buffer
  21.  * heads are now dynamically allocated
  22.  */
  23. /* #define EXT2_MAX_GROUP_DESC 8 */
  25. #define EXT2_MAX_GROUP_LOADED 8
  27. /*
  28.  * second extended-fs super-block data in memory
  29.  */
  30. struct ext2_sb_info {
  31. unsigned long s_frag_size; /* Size of a fragment in bytes */
  32. unsigned long s_frags_per_block;/* Number of fragments per block */
  33. unsigned long s_inodes_per_block;/* Number of inodes per block */
  34. unsigned long s_frags_per_group;/* Number of fragments in a group */
  35. unsigned long s_blocks_per_group;/* Number of blocks in a group */
  36. unsigned long s_inodes_per_group;/* Number of inodes in a group */
  37. unsigned long s_itb_per_group; /* Number of inode table blocks per group */
  38. unsigned long s_gdb_count; /* Number of group descriptor blocks */
  39. unsigned long s_desc_per_block; /* Number of group descriptors per block */
  40. unsigned long s_groups_count; /* Number of groups in the fs */
  41. struct buffer_head * s_sbh; /* Buffer containing the super block */
  42. struct ext2_super_block * s_es; /* Pointer to the super block in the buffer */
  43. struct buffer_head ** s_group_desc;
  44. unsigned short s_loaded_inode_bitmaps;
  45. unsigned short s_loaded_block_bitmaps;
  46. unsigned long s_inode_bitmap_number[EXT2_MAX_GROUP_LOADED];
  47. struct buffer_head * s_inode_bitmap[EXT2_MAX_GROUP_LOADED];
  48. unsigned long s_block_bitmap_number[EXT2_MAX_GROUP_LOADED];
  49. struct buffer_head * s_block_bitmap[EXT2_MAX_GROUP_LOADED];
  50. unsigned long  s_mount_opt;
  51. uid_t s_resuid;
  52. gid_t s_resgid;
  53. unsigned short s_mount_state;
  54. unsigned short s_pad;
  55. int s_addr_per_block_bits;
  56. int s_desc_per_block_bits;
  57. int s_inode_size;
  58. int s_first_ino;
  59. };
  61. #endif /* _LINUX_EXT2_FS_SB */