include/minix/vtreefs.h

   1 #ifndef _MINIX_VTREEFS_H
   2 #define _MINIX_VTREEFS_H
   3
   4 struct inode;
   5 typedef int index_t;
   6 typedef void *cbdata_t;
   7
   8 #define NO_INDEX        ((index_t) -1)
   9
  10 /* Maximum file name length, excluding terminating null character. It is set
  11  * to a low value to limit memory usage, but can be changed to any value.
  12  */
  13 #define PNAME_MAX       24
  14
  15 struct inode_stat {
  16         mode_t mode;            /* file mode (type and permissions) */
  17         uid_t uid;              /* user ID */
  18         gid_t gid;              /* group ID */
  19         off_t size;             /* file size */
  20         dev_t dev;              /* device number (for char/block type files) */
  21 };
  22
  23 struct fs_hooks {
  24         void (*init_hook)(void);
  25         void (*cleanup_hook)(void);
  26         int (*lookup_hook)(struct inode *inode, char *name, cbdata_t cbdata);
  27         int (*getdents_hook)(struct inode *inode, cbdata_t cbdata);
  28         int (*read_hook)(struct inode *inode, off_t offset, char **ptr,
  29                 size_t *len, cbdata_t cbdata);
  30         int (*rdlink_hook)(struct inode *inode, char *ptr, size_t max,
  31                 cbdata_t cbdata);
  32         int (*message_hook)(message *m);
  33 };
  34
  35 extern struct inode *add_inode(struct inode *parent, char *name, index_t index,
  36         struct inode_stat *stat, index_t nr_indexed_entries, cbdata_t cbdata);
  37 extern void delete_inode(struct inode *inode);
  38
  39 extern struct inode *get_inode_by_name(struct inode *parent, char *name);
  40 extern struct inode *get_inode_by_index(struct inode *parent, index_t index);
  41
  42 extern char const *get_inode_name(struct inode *inode);
  43 extern index_t get_inode_index(struct inode *inode);
  44 extern cbdata_t get_inode_cbdata(struct inode *inode);
  45
  46 extern struct inode *get_root_inode(void);
  47 extern struct inode *get_parent_inode(struct inode *inode);
  48 extern struct inode *get_first_inode(struct inode *parent);
  49 extern struct inode *get_next_inode(struct inode *previous);
  50
  51 extern void get_inode_stat(struct inode *inode, struct inode_stat *stat);
  52 extern void set_inode_stat(struct inode *inode, struct inode_stat *stat);
  53
  54 extern void start_vtreefs(struct fs_hooks *hooks, unsigned int nr_inodes,
  55         struct inode_stat *stat, index_t nr_indexed_entries);
  56
  57 #endif /* _MINIX_VTREEFS_H */