1 /* $NetBSD: specdev.h,v 1.14 1996/09/07 12:41:20 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)specdev.h 8.3 (Berkeley) 8/10/94 36 */ 37 38 /* 39 * This structure defines the information maintained about 40 * special devices. It is allocated in checkalias and freed 41 * in vgone. 42 */ 43 struct specinfo { 44 struct vnode **si_hashchain; 45 struct vnode *si_specnext; 46 long si_flags; 47 dev_t si_rdev; 48 }; 49 /* 50 * Exported shorthand 51 */ 52 #define v_rdev v_specinfo->si_rdev 53 #define v_hashchain v_specinfo->si_hashchain 54 #define v_specnext v_specinfo->si_specnext 55 #define v_specflags v_specinfo->si_flags 56 57 /* 58 * Flags for specinfo 59 */ 60 #define SI_MOUNTEDON 0x0001 /* block special device is mounted on */ 61 62 /* 63 * Special device management 64 */ 65 #define SPECHSZ 64 66 #if ((SPECHSZ&(SPECHSZ-1)) == 0) 67 #define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1)) 68 #else 69 #define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ) 70 #endif 71 72 struct vnode *speclisth[SPECHSZ]; 73 74 /* 75 * Prototypes for special file operations on vnodes. 76 */ 77 extern int (**spec_vnodeop_p) __P((void *)); 78 struct nameidata; 79 struct componentname; 80 struct ucred; 81 struct flock; 82 struct buf; 83 struct uio; 84 85 int spec_lookup __P((void *)); 86 #define spec_create genfs_badop 87 #define spec_mknod genfs_badop 88 int spec_open __P((void *)); 89 int spec_close __P((void *)); 90 #define spec_access genfs_ebadf 91 #define spec_getattr genfs_ebadf 92 #define spec_setattr genfs_ebadf 93 int spec_read __P((void *)); 94 int spec_write __P((void *)); 95 #define spec_lease_check genfs_nullop 96 int spec_ioctl __P((void *)); 97 int spec_poll __P((void *)); 98 #define spec_mmap genfs_badop 99 int spec_fsync __P((void *)); 100 #define spec_seek genfs_badop 101 #define spec_remove genfs_badop 102 #define spec_link genfs_badop 103 #define spec_rename genfs_badop 104 #define spec_mkdir genfs_badop 105 #define spec_rmdir genfs_badop 106 #define spec_symlink genfs_badop 107 #define spec_readdir genfs_badop 108 #define spec_readlink genfs_badop 109 #define spec_abortop genfs_badop 110 #define spec_inactive genfs_nullop 111 #define spec_reclaim genfs_nullop 112 int spec_lock __P((void *)); 113 int spec_unlock __P((void *)); 114 int spec_bmap __P((void *)); 115 int spec_strategy __P((void *)); 116 int spec_print __P((void *)); 117 #define spec_islocked genfs_nullop 118 int spec_pathconf __P((void *)); 119 #define spec_advlock genfs_eopnotsupp 120 #define spec_blkatoff genfs_badop 121 #define spec_valloc genfs_badop 122 #define spec_reallocblks genfs_badop 123 #define spec_vfree genfs_badop 124 #define spec_truncate genfs_nullop 125 #define spec_update genfs_nullop 126 #define spec_bwrite vn_bwrite 127