usr/src/sys/miscfs/specfs/specdev.h

/*
 * Copyright (c) 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)specdev.h   8.1 (Berkeley) %G%
 */

/*
 * This structure defines the information maintained about
 * special devices. It is allocated in checkalias and freed
 * in vgone.
 */
struct specinfo {
        struct  vnode **si_hashchain;
        struct  vnode *si_specnext;
        long    si_flags;
        dev_t   si_rdev;
};
/*
 * Exported shorthand
 */
#define v_rdev v_specinfo->si_rdev
#define v_hashchain v_specinfo->si_hashchain
#define v_specnext v_specinfo->si_specnext
#define v_specflags v_specinfo->si_flags

/*
 * Flags for specinfo
 */
#define SI_MOUNTEDON    0x0001  /* block special device is mounted on */

/*
 * Special device management
 */
#define SPECHSZ 64
#if     ((SPECHSZ&(SPECHSZ-1)) == 0)
#define SPECHASH(rdev)  (((rdev>>5)+(rdev))&(SPECHSZ-1))
#else
#define SPECHASH(rdev)  (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
#endif

struct vnode *speclisth[SPECHSZ];

/*
 * Prototypes for special file operations on vnodes.
 */
extern  int (**spec_vnodeop_p)();
struct  nameidata;
struct  componentname;
struct  ucred;
struct  flock;
struct  buf;
struct  uio;

int     spec_badop(),
        spec_ebadf();

int     spec_lookup __P((struct vop_lookup_args *));
#define spec_create ((int (*) __P((struct  vop_create_args *)))spec_badop)
#define spec_mknod ((int (*) __P((struct  vop_mknod_args *)))spec_badop)
int     spec_open __P((struct vop_open_args *));
int     spec_close __P((struct vop_close_args *));
#define spec_access ((int (*) __P((struct  vop_access_args *)))spec_ebadf)
#define spec_getattr ((int (*) __P((struct  vop_getattr_args *)))spec_ebadf)
#define spec_setattr ((int (*) __P((struct  vop_setattr_args *)))spec_ebadf)
int     spec_read __P((struct vop_read_args *));
int     spec_write __P((struct vop_write_args *));
int     spec_ioctl __P((struct vop_ioctl_args *));
int     spec_select __P((struct vop_select_args *));
#define spec_mmap ((int (*) __P((struct  vop_mmap_args *)))spec_badop)
int     spec_fsync __P((struct  vop_fsync_args *));
#define spec_seek ((int (*) __P((struct  vop_seek_args *)))spec_badop)
#define spec_remove ((int (*) __P((struct  vop_remove_args *)))spec_badop)
#define spec_link ((int (*) __P((struct  vop_link_args *)))spec_badop)
#define spec_rename ((int (*) __P((struct  vop_rename_args *)))spec_badop)
#define spec_mkdir ((int (*) __P((struct  vop_mkdir_args *)))spec_badop)
#define spec_rmdir ((int (*) __P((struct  vop_rmdir_args *)))spec_badop)
#define spec_symlink ((int (*) __P((struct  vop_symlink_args *)))spec_badop)
#define spec_readdir ((int (*) __P((struct  vop_readdir_args *)))spec_badop)
#define spec_readlink ((int (*) __P((struct  vop_readlink_args *)))spec_badop)
#define spec_abortop ((int (*) __P((struct  vop_abortop_args *)))spec_badop)
#define spec_inactive ((int (*) __P((struct  vop_inactive_args *)))nullop)
#define spec_reclaim ((int (*) __P((struct  vop_reclaim_args *)))nullop)
int     spec_lock __P((struct vop_lock_args *));
int     spec_unlock __P((struct vop_unlock_args *));
int     spec_bmap __P((struct vop_bmap_args *));
int     spec_strategy __P((struct vop_strategy_args *));
int     spec_print __P((struct vop_print_args *));
#define spec_islocked ((int (*) __P((struct  vop_islocked_args *)))nullop)
int     spec_pathconf __P((struct vop_pathconf_args *));
int     spec_advlock __P((struct vop_advlock_args *));
#define spec_blkatoff ((int (*) __P((struct  vop_blkatoff_args *)))spec_badop)
#define spec_valloc ((int (*) __P((struct  vop_valloc_args *)))spec_badop)
#define spec_vfree ((int (*) __P((struct  vop_vfree_args *)))spec_badop)
#define spec_truncate ((int (*) __P((struct  vop_truncate_args *)))nullop)
#define spec_update ((int (*) __P((struct  vop_update_args *)))nullop)
#define spec_bwrite ((int (*) __P((struct  vop_bwrite_args *)))nullop)