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#ifndef _LINUX_DEVFS_FS_KERNEL_H
#define _LINUX_DEVFS_FS_KERNEL_H
#include <linux/fs.h>
#include <linux/config.h>
#define DEVFS_SUPER_MAGIC 0x1373
#define IS_DEVFS_INODE(inode) (DEVFS_SUPER_MAGIC == (inode)->i_sb->s_magic)
#define DEVFS_MINOR(inode) \
({unsigned int m; /* evil GCC trickery */ \
((inode)->i_sb && \
((inode)->i_sb->s_magic==DEVFS_SUPER_MAGIC) && \
(devfs_get_maj_min(devfs_get_handle_from_inode((inode)),NULL,&m)==0) \
) ? m : MINOR((inode)->r_dev); })
#define DEVFS_FL_NONE 0x000 /* This helps to make code more readable
*/
#define DEVFS_FL_AUTO_OWNER 0x001 /* When a closed inode is opened the
ownerships are set to the opening
process and the protection is set to
that given in <<mode>>. When the inode
is closed, ownership reverts back to
<<uid>> and <<gid>> and the protection
is set to read-write for all */
#define DEVFS_FL_SHOW_UNREG 0x002 /* Show unregistered entries in
directory listings */
#define DEVFS_FL_HIDE 0x004 /* Do not show entry in directory list */
#define DEVFS_FL_AUTO_DEVNUM 0x008 /* Automatically generate device number
*/
#define DEVFS_FL_AOPEN_NOTIFY 0x010 /* Asynchronously notify devfsd on open
*/
#define DEVFS_FL_REMOVABLE 0x020 /* This is a removable media device */
#define DEVFS_FL_WAIT 0x040 /* Wait for devfsd to finish */
#define DEVFS_FL_NO_PERSISTENCE 0x080 /* Forget changes after unregister */
#define DEVFS_FL_DEFAULT DEVFS_FL_NONE
#define DEVFS_SPECIAL_CHR 0
#define DEVFS_SPECIAL_BLK 1
typedef struct devfs_entry * devfs_handle_t;
#ifdef CONFIG_BLK_DEV_INITRD
# define ROOT_DEVICE_NAME ((real_root_dev ==ROOT_DEV) ? root_device_name:NULL)
#else
# define ROOT_DEVICE_NAME root_device_name
#endif
#ifdef CONFIG_DEVFS_FS
extern devfs_handle_t devfs_register (devfs_handle_t dir,
const char *name, unsigned int namelen,
unsigned int flags,
unsigned int major, unsigned int minor,
umode_t mode, uid_t uid, gid_t gid,
void *ops, void *info);
extern void devfs_unregister (devfs_handle_t de);
extern int devfs_mk_symlink (devfs_handle_t dir,
const char *name, unsigned int namelen,
unsigned int flags,
const char *link, unsigned int linklength,
devfs_handle_t *handle, void *info);
extern devfs_handle_t devfs_mk_dir (devfs_handle_t dir, const char *name,
unsigned int namelen, void *info);
extern devfs_handle_t devfs_find_handle (devfs_handle_t dir,
const char *name,unsigned int namelen,
unsigned int major,unsigned int minor,
char type, int traverse_symlinks);
extern int devfs_get_flags (devfs_handle_t de, unsigned int *flags);
extern int devfs_set_flags (devfs_handle_t de, unsigned int flags);
extern int devfs_get_maj_min (devfs_handle_t de,
unsigned int *major, unsigned int *minor);
extern devfs_handle_t devfs_get_handle_from_inode (struct inode *inode);
extern int devfs_generate_path (devfs_handle_t de, char *path, int buflen);
extern void *devfs_get_ops (devfs_handle_t de);
extern int devfs_set_file_size (devfs_handle_t de, unsigned long size);
extern void *devfs_get_info (devfs_handle_t de);
extern int devfs_set_info (devfs_handle_t de, void *info);
extern devfs_handle_t devfs_get_parent (devfs_handle_t de);
extern devfs_handle_t devfs_get_first_child (devfs_handle_t de);
extern devfs_handle_t devfs_get_next_sibling (devfs_handle_t de);
extern void devfs_auto_unregister (devfs_handle_t master,devfs_handle_t slave);
extern devfs_handle_t devfs_get_unregister_slave (devfs_handle_t master);
extern const char *devfs_get_name (devfs_handle_t de, unsigned int *namelen);
extern int devfs_register_chrdev (unsigned int major, const char *name,
struct file_operations *fops);
extern int devfs_register_blkdev (unsigned int major, const char *name,
struct block_device_operations *bdops);
extern int devfs_unregister_chrdev (unsigned int major, const char *name);
extern int devfs_unregister_blkdev (unsigned int major, const char *name);
extern void devfs_register_tape (devfs_handle_t de);
extern void devfs_register_series (devfs_handle_t dir, const char *format,
unsigned int num_entries,
unsigned int flags, unsigned int major,
unsigned int minor_start,
umode_t mode, uid_t uid, gid_t gid,
void *ops, void *info);
extern int init_devfs_fs (void);
extern void mount_devfs_fs (void);
extern void devfs_make_root (const char *name);
#else /* CONFIG_DEVFS_FS */
static inline devfs_handle_t devfs_register (devfs_handle_t dir,
const char *name,
unsigned int namelen,
unsigned int flags,
unsigned int major,
unsigned int minor,
umode_t mode,
uid_t uid, gid_t gid,
void *ops, void *info)
{
return NULL;
}
static inline void devfs_unregister (devfs_handle_t de)
{
return;
}
static inline int devfs_mk_symlink (devfs_handle_t dir,
const char *name, unsigned int namelen,
unsigned int flags,
const char *link, unsigned int linklength,
devfs_handle_t *handle, void *info)
{
return 0;
}
static inline devfs_handle_t devfs_mk_dir (devfs_handle_t dir,
const char *name,
unsigned int namelen, void *info)
{
return NULL;
}
static inline devfs_handle_t devfs_find_handle (devfs_handle_t dir,
const char *name,
unsigned int namelen,
unsigned int major,
unsigned int minor,
char type,
int traverse_symlinks)
{
return NULL;
}
static inline int devfs_get_flags (devfs_handle_t de, unsigned int *flags)
{
return 0;
}
static inline int devfs_set_flags (devfs_handle_t de, unsigned int flags)
{
return 0;
}
static inline int devfs_get_maj_min (devfs_handle_t de,
unsigned int *major, unsigned int *minor)
{
return 0;
}
static inline devfs_handle_t devfs_get_handle_from_inode (struct inode *inode)
{
return NULL;
}
static inline int devfs_generate_path (devfs_handle_t de, char *path,
int buflen)
{
return -ENOSYS;
}
static inline void *devfs_get_ops (devfs_handle_t de)
{
return NULL;
}
static inline int devfs_set_file_size (devfs_handle_t de, unsigned long size)
{
return -ENOSYS;
}
static inline void *devfs_get_info (devfs_handle_t de, unsigned long size)
{
return NULL;
}
static inline int devfs_set_info (devfs_handle_t de, void *info)
{
return 0;
}
static inline devfs_handle_t devfs_get_parent (devfs_handle_t de)
{
return NULL;
}
static inline devfs_handle_t devfs_get_first_child (devfs_handle_t de)
{
return NULL;
}
static inline devfs_handle_t devfs_get_next_sibling (devfs_handle_t de)
{
return NULL;
}
static inline void devfs_auto_unregister (devfs_handle_t master,
devfs_handle_t slave)
{
return;
}
static inline devfs_handle_t devfs_get_unregister_slave (devfs_handle_t master)
{
return NULL;
}
static inline const char *devfs_get_name (devfs_handle_t de,
unsigned int *namelen)
{
return NULL;
}
static inline int devfs_register_chrdev (unsigned int major, const char *name,
struct file_operations *fops)
{
return register_chrdev (major, name, fops);
}
static inline int devfs_register_blkdev (unsigned int major, const char *name,
struct block_device_operations *bdops)
{
return register_blkdev (major, name, bdops);
}
static inline int devfs_unregister_chrdev (unsigned int major,const char *name)
{
return unregister_chrdev (major, name);
}
static inline int devfs_unregister_blkdev (unsigned int major,const char *name)
{
return unregister_blkdev (major, name);
}
static inline void devfs_register_tape (devfs_handle_t de)
{
return;
}
static inline void devfs_register_series (devfs_handle_t dir,
const char *format,
unsigned int num_entries,
unsigned int flags,
unsigned int major,
unsigned int minor_start,
umode_t mode, uid_t uid, gid_t gid,
void *ops, void *info)
{
return;
}
static inline int init_devfs_fs (void)
{
return 0;
}
static inline void mount_devfs_fs (void)
{
return;
}
static inline void devfs_make_root (const char *name)
{
return;
}
#endif /* CONFIG_DEVFS_FS */
#endif /* _LINUX_DEVFS_FS_KERNEL_H */
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