Annotation of sys/miscfs/specfs/specdev.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: specdev.h,v 1.20 2007/06/02 00:45:21 thib Exp $ */
! 2: /* $NetBSD: specdev.h,v 1.12 1996/02/13 13:13:01 mycroft Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1990, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. Neither the name of the University nor the names of its contributors
! 17: * may be used to endorse or promote products derived from this software
! 18: * without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 30: * SUCH DAMAGE.
! 31: *
! 32: * @(#)specdev.h 8.3 (Berkeley) 8/10/94
! 33: */
! 34:
! 35: /*
! 36: * This structure defines the information maintained about
! 37: * special devices. It is allocated in checkalias and freed
! 38: * in vgone.
! 39: */
! 40: struct specinfo {
! 41: struct vnode **si_hashchain;
! 42: struct vnode *si_specnext;
! 43: struct mount *si_mountpoint;
! 44: dev_t si_rdev;
! 45: struct lockf *si_lockf;
! 46: daddr64_t si_lastr;
! 47: union {
! 48: struct vnode *ci_parent; /* pointer back to parent device */
! 49: u_int8_t ci_bitmap[8]; /* bitmap of devices cloned off us */
! 50: } si_ci;
! 51: };
! 52:
! 53: struct cloneinfo {
! 54: struct vnode *ci_vp; /* cloned vnode */
! 55: void *ci_data; /* original vnode's v_data */
! 56: };
! 57:
! 58: /*
! 59: * Exported shorthand
! 60: */
! 61: #define v_rdev v_specinfo->si_rdev
! 62: #define v_hashchain v_specinfo->si_hashchain
! 63: #define v_specnext v_specinfo->si_specnext
! 64: #define v_specmountpoint v_specinfo->si_mountpoint
! 65: #define v_speclockf v_specinfo->si_lockf
! 66: #define v_specparent v_specinfo->si_ci.ci_parent
! 67: #define v_specbitmap v_specinfo->si_ci.ci_bitmap
! 68:
! 69: /*
! 70: * Special device management
! 71: */
! 72: #define SPECHSZ 64
! 73: #if ((SPECHSZ&(SPECHSZ-1)) == 0)
! 74: #define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1))
! 75: #else
! 76: #define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
! 77: #endif
! 78:
! 79: extern struct vnode *speclisth[SPECHSZ];
! 80:
! 81: /*
! 82: * Prototypes for special file operations on vnodes.
! 83: */
! 84: extern int (**spec_vnodeop_p)(void *);
! 85: struct nameidata;
! 86: struct componentname;
! 87: struct ucred;
! 88: struct flock;
! 89: struct buf;
! 90: struct uio;
! 91:
! 92: int spec_badop(void *);
! 93: int spec_ebadf(void *);
! 94:
! 95: int spec_lookup(void *);
! 96: #define spec_create spec_badop
! 97: #define spec_mknod spec_badop
! 98: int spec_open(void *);
! 99: int spec_close(void *);
! 100: #define spec_access spec_ebadf
! 101: #define spec_getattr spec_ebadf
! 102: #define spec_setattr spec_ebadf
! 103: int spec_read(void *);
! 104: int spec_write(void *);
! 105: int spec_ioctl(void *);
! 106: int spec_poll(void *);
! 107: int spec_kqfilter(void *);
! 108: int spec_fsync(void *);
! 109: #define spec_remove spec_badop
! 110: #define spec_link spec_badop
! 111: #define spec_rename spec_badop
! 112: #define spec_mkdir spec_badop
! 113: #define spec_rmdir spec_badop
! 114: #define spec_symlink spec_badop
! 115: #define spec_readdir spec_badop
! 116: #define spec_readlink spec_badop
! 117: #define spec_abortop spec_badop
! 118: int spec_inactive(void *);
! 119: #define spec_reclaim nullop
! 120: #define spec_lock vop_generic_lock
! 121: #define spec_unlock vop_generic_unlock
! 122: #define spec_islocked vop_generic_islocked
! 123: int spec_bmap(void *);
! 124: int spec_strategy(void *);
! 125: int spec_print(void *);
! 126: int spec_pathconf(void *);
! 127: int spec_advlock(void *);
! 128: #define spec_reallocblks spec_badop
! 129: #define spec_bwrite vop_generic_bwrite
! 130: #define spec_revoke vop_generic_revoke
! 131:
! 132: int spec_vnoperate(void *);
! 133:
! 134: /* spec_subr.c */
! 135: int spec_open_clone(struct vop_open_args *);
! 136: int spec_close_clone(struct vop_close_args *);
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