1 /* $NetBSD: specdev.h,v 1.24 2003/08/07 16:32:44 agc 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)specdev.h 8.6 (Berkeley) 5/21/95 32 */ 33 #ifndef _MISCFS_SPECFS_SPECDEV_H_ 34 #define _MISCFS_SPECFS_SPECDEV_H_ 35 36 /* 37 * This structure defines the information maintained about 38 * special devices. It is allocated in checkalias and freed 39 * in vgone. 40 */ 41 struct specinfo { 42 struct vnode **si_hashchain; 43 struct vnode *si_specnext; 44 struct mount *si_mountpoint; 45 dev_t si_rdev; 46 struct lockf *si_lockf; 47 }; 48 /* 49 * Exported shorthand 50 */ 51 #define v_rdev v_specinfo->si_rdev 52 #define v_hashchain v_specinfo->si_hashchain 53 #define v_specnext v_specinfo->si_specnext 54 #define v_speclockf v_specinfo->si_lockf 55 #define v_specmountpoint v_specinfo->si_mountpoint 56 57 /* 58 * Special device management 59 */ 60 #define SPECHSZ 64 61 #if ((SPECHSZ&(SPECHSZ-1)) == 0) 62 #define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1)) 63 #else 64 #define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ) 65 #endif 66 67 extern struct vnode *speclisth[SPECHSZ]; 68 69 /* 70 * Prototypes for special file operations on vnodes. 71 */ 72 extern int (**spec_vnodeop_p) __P((void *)); 73 struct nameidata; 74 struct componentname; 75 struct ucred; 76 struct flock; 77 struct buf; 78 struct uio; 79 80 int spec_lookup __P((void *)); 81 #define spec_create genfs_badop 82 #define spec_mknod genfs_badop 83 int spec_open __P((void *)); 84 int spec_close __P((void *)); 85 #define spec_access genfs_ebadf 86 #define spec_getattr genfs_ebadf 87 #define spec_setattr genfs_ebadf 88 int spec_read __P((void *)); 89 int spec_write __P((void *)); 90 #define spec_lease_check genfs_nullop 91 #define spec_fcntl genfs_fcntl 92 int spec_ioctl __P((void *)); 93 int spec_poll __P((void *)); 94 int spec_kqfilter __P((void *)); 95 #define spec_revoke genfs_revoke 96 #define spec_mmap genfs_mmap 97 int spec_fsync __P((void *)); 98 #define spec_seek genfs_nullop /* XXX should query device */ 99 #define spec_remove genfs_badop 100 #define spec_link genfs_badop 101 #define spec_rename genfs_badop 102 #define spec_mkdir genfs_badop 103 #define spec_rmdir genfs_badop 104 #define spec_symlink genfs_badop 105 #define spec_readdir genfs_badop 106 #define spec_readlink genfs_badop 107 #define spec_abortop genfs_badop 108 #define spec_reclaim genfs_nullop 109 int spec_inactive __P((void *)); 110 #define spec_lock genfs_nolock 111 #define spec_unlock genfs_nounlock 112 int spec_bmap __P((void *)); 113 int spec_strategy __P((void *)); 114 int spec_print __P((void *)); 115 #define spec_islocked genfs_noislocked 116 int spec_pathconf __P((void *)); 117 int spec_advlock __P((void *)); 118 #define spec_blkatoff genfs_badop 119 #define spec_valloc genfs_badop 120 #define spec_reallocblks genfs_badop 121 #define spec_vfree genfs_badop 122 #define spec_truncate genfs_nullop 123 #define spec_update genfs_nullop 124 #define spec_bwrite vn_bwrite 125 #define spec_getpages genfs_getpages 126 #define spec_putpages genfs_putpages 127 int spec_size __P((void *)); 128 129 #endif /* _MISCFS_SPECFS_SPECDEV_H_ */ 130