include/linux/ext

/* */
   1 #ifndef _EXT_FS_H
   2 #define _EXT_FS_H
   3 
   4 /*
   5  * The ext filesystem constants/structures
   6  */
   7 
   8 /*
   9  * Free blocks/inodes management style
  10  *
  11  * One of these two constants must be defined
  12  *
  13  */
  14 /* #define EXTFS_BITMAP */      /* use a bitmap */
  15 #define EXTFS_FREELIST          /* use a linked list */
  16 
  17 #define EXT_NAME_LEN 255
  18 #define EXT_ROOT_INO 1
  19 
  20 #define EXT_I_MAP_SLOTS 8
  21 #define EXT_Z_MAP_SLOTS 8
  22 #define EXT_SUPER_MAGIC 0x137D
  23 
  24 #define EXT_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct ext_inode)))
  25 /* #define EXT_DIR_ENTRIES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct ext_dir_entry))) */
  26 
  27 struct ext_inode {
  28         unsigned short i_mode;
  29         unsigned short i_uid;
  30         unsigned long i_size;
  31         unsigned long i_time;
  32         unsigned short i_gid;
  33         unsigned short i_nlinks;
  34         unsigned long i_zone[12];
  35 };
  36 
  37 struct ext_free_inode {
  38         unsigned long count;
  39         unsigned long free[14];
  40         unsigned long next;
  41 };
  42 
  43 struct ext_free_block {
  44         unsigned long count;
  45         unsigned long free[254];
  46         unsigned long next;
  47 };
  48 
  49 struct ext_super_block {
  50         unsigned long s_ninodes;
  51         unsigned long s_nzones;
  52 #ifdef EXTFS_BITMAP
  53         unsigned long s_imap_blocks;
  54         unsigned long s_zmap_blocks;
  55 #endif
  56 #ifdef EXTFS_FREELIST
  57         unsigned long s_firstfreeblock;
  58         unsigned long s_freeblockscount;
  59         unsigned long s_firstfreeinode;
  60         unsigned long s_freeinodescount;
  61 #endif
  62         unsigned long s_firstdatazone;
  63         unsigned long s_log_zone_size;
  64         unsigned long s_max_size;
  65         unsigned long s_reserved1;
  66         unsigned long s_reserved2;
  67         unsigned long s_reserved3;
  68         unsigned long s_reserved4;
  69         unsigned long s_reserved5;
  70         unsigned short s_magic;
  71 };
  72 
  73 struct ext_dir_entry {
  74         unsigned long inode;
  75         unsigned short rec_len;
  76         unsigned short name_len;
  77         char name[EXT_NAME_LEN];
  78 };
  79 
  80 extern int ext_open(struct inode * inode, struct file * filp);
  81 extern void ext_release(struct inode * inode, struct file * filp);
  82 extern int ext_lookup(struct inode * dir,const char * name, int len,
  83         struct inode ** result);
  84 extern int ext_create(struct inode * dir,const char * name, int len, int mode,
  85         struct inode ** result);
  86 extern int ext_mkdir(struct inode * dir, const char * name, int len, int mode);
  87 extern int ext_rmdir(struct inode * dir, const char * name, int len);
  88 extern int ext_unlink(struct inode * dir, const char * name, int len);
  89 extern int ext_symlink(struct inode * inode, const char * name, int len,
  90         const char * symname);
  91 extern int ext_link(struct inode * oldinode, struct inode * dir, const char * name, int len);
  92 extern int ext_mknod(struct inode * dir, const char * name, int len, int mode, int rdev);
  93 extern int ext_rename(struct inode * old_dir, const char * old_name, int old_len,
  94         struct inode * new_dir, const char * new_name, int new_len);
  95 extern struct inode * ext_new_inode(int dev);
  96 extern void ext_free_inode(struct inode * inode);
  97 extern unsigned long ext_count_free_inodes(struct super_block *sb);
  98 extern int ext_new_block(int dev);
  99 extern int ext_free_block(int dev, int block);
 100 extern unsigned long ext_count_free_blocks(struct super_block *sb);
 101 
 102 extern int ext_create_block(struct inode *, int);
 103 extern int ext_bmap(struct inode *,int);
 104 
 105 extern void ext_truncate(struct inode *);
 106 extern void ext_put_super(struct super_block *);
 107 extern void ext_write_super(struct super_block *);
 108 extern struct super_block *ext_read_super(struct super_block *,void *);
 109 extern void ext_read_inode(struct inode *);
 110 extern void ext_write_inode(struct inode *);
 111 extern void ext_put_inode(struct inode *);
 112 extern void ext_statfs(struct super_block *, struct statfs *);
 113 
 114 extern int ext_lseek(struct inode *, struct file *, off_t, int);
 115 extern int ext_read(struct inode *, struct file *, char *, int);
 116 extern int ext_write(struct inode *, struct file *, char *, int);
 117 
 118 extern struct inode_operations ext_file_inode_operations;
 119 extern struct inode_operations ext_dir_inode_operations;
 120 extern struct inode_operations ext_symlink_inode_operations;
 121 extern struct inode_operations ext_chrdev_inode_operations;
 122 extern struct inode_operations ext_blkdev_inode_operations;
 123 extern struct inode_operations ext_fifo_inode_operations;
 124 
 125 extern struct file_operations ext_file_operations;
 126 extern struct file_operations ext_dir_operations;
 127 
 128 #endif
/* */
root/include/linux/ext_fs.h

INCLUDED FROM
