LXR linux/fs/minix/minix.h

   1#ifndef FS_MINIX_H
   2#define FS_MINIX_H
   3
   4#include <linux/fs.h>
   5#include <linux/pagemap.h>
   6#include <linux/minix_fs.h>
   7
   8#define INODE_VERSION(inode)    minix_sb(inode->i_sb)->s_version
   9#define MINIX_V1                0x0001          /* original minix fs */
  10#define MINIX_V2                0x0002          /* minix V2 fs */
  11#define MINIX_V3                0x0003          /* minix V3 fs */
  12
  13/*
  14 * minix fs inode data in memory
  15 */
  16struct minix_inode_info {
  17        union {
  18                __u16 i1_data[16];
  19                __u32 i2_data[16];
  20        } u;
  21        struct inode vfs_inode;
  22};
  23
  24/*
  25 * minix super-block data in memory
  26 */
  27struct minix_sb_info {
  28        unsigned long s_ninodes;
  29        unsigned long s_nzones;
  30        unsigned long s_imap_blocks;
  31        unsigned long s_zmap_blocks;
  32        unsigned long s_firstdatazone;
  33        unsigned long s_log_zone_size;
  34        unsigned long s_max_size;
  35        int s_dirsize;
  36        int s_namelen;
  37        int s_link_max;
  38        struct buffer_head ** s_imap;
  39        struct buffer_head ** s_zmap;
  40        struct buffer_head * s_sbh;
  41        struct minix_super_block * s_ms;
  42        unsigned short s_mount_state;
  43        unsigned short s_version;
  44};
  45
  46extern struct inode *minix_iget(struct super_block *, unsigned long);
  47extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
  48extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
  49extern struct inode * minix_new_inode(const struct inode * dir, int * error);
  50extern void minix_free_inode(struct inode * inode);
  51extern unsigned long minix_count_free_inodes(struct minix_sb_info *sbi);
  52extern int minix_new_block(struct inode * inode);
  53extern void minix_free_block(struct inode *inode, unsigned long block);
  54extern unsigned long minix_count_free_blocks(struct minix_sb_info *sbi);
  55extern int minix_getattr(struct vfsmount *, struct dentry *, struct kstat *);
  56extern int __minix_write_begin(struct file *file, struct address_space *mapping,
  57                        loff_t pos, unsigned len, unsigned flags,
  58                        struct page **pagep, void **fsdata);
  59
  60extern void V1_minix_truncate(struct inode *);
  61extern void V2_minix_truncate(struct inode *);
  62extern void minix_truncate(struct inode *);
  63extern void minix_set_inode(struct inode *, dev_t);
  64extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
  65extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
  66extern unsigned V1_minix_blocks(loff_t, struct super_block *);
  67extern unsigned V2_minix_blocks(loff_t, struct super_block *);
  68
  69extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**);
  70extern int minix_add_link(struct dentry*, struct inode*);
  71extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
  72extern int minix_make_empty(struct inode*, struct inode*);
  73extern int minix_empty_dir(struct inode*);
  74extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
  75extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
  76extern ino_t minix_inode_by_name(struct dentry*);
  77
  78extern const struct inode_operations minix_file_inode_operations;
  79extern const struct inode_operations minix_dir_inode_operations;
  80extern const struct file_operations minix_file_operations;
  81extern const struct file_operations minix_dir_operations;
  82
  83static inline struct minix_sb_info *minix_sb(struct super_block *sb)
  84{
  85        return sb->s_fs_info;
  86}
  87
  88static inline struct minix_inode_info *minix_i(struct inode *inode)
  89{
  90        return list_entry(inode, struct minix_inode_info, vfs_inode);
  91}
  92
  93#endif /* FS_MINIX_H */
  94