specdev.h revision 1.3
1 /* 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)specdev.h 7.4 (Berkeley) 4/19/91 34 * $Id: specdev.h,v 1.3 1993/05/20 16:23:11 cgd Exp $ 35 */ 36 37 #ifndef _SYS_SPECDEV_H_ 38 #define _SYS_SPECDEV_H_ 39 40 /* 41 * This structure defines the information maintained about 42 * special devices. It is allocated in checkalias and freed 43 * in vgone. 44 */ 45 struct specinfo { 46 struct vnode **si_hashchain; 47 struct vnode *si_specnext; 48 long si_flags; 49 dev_t si_rdev; 50 }; 51 /* 52 * Exported shorthand 53 */ 54 #define v_rdev v_specinfo->si_rdev 55 #define v_hashchain v_specinfo->si_hashchain 56 #define v_specnext v_specinfo->si_specnext 57 #define v_specflags v_specinfo->si_flags 58 59 /* 60 * Flags for specinfo 61 */ 62 #define SI_MOUNTEDON 0x0001 /* block special device is mounted on */ 63 64 /* 65 * Special device management 66 */ 67 #define SPECHSZ 64 68 #if ((SPECHSZ&(SPECHSZ-1)) == 0) 69 #define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1)) 70 #else 71 #define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ) 72 #endif 73 74 struct vnode *speclisth[SPECHSZ]; 75 76 /* 77 * Prototypes for special file operations on vnodes. 78 */ 79 struct nameidata; 80 struct ucred; 81 struct flock; 82 struct buf; 83 struct uio; 84 85 int spec_badop(), 86 spec_ebadf(); 87 88 int spec_lookup __P(( 89 struct vnode *vp, 90 struct nameidata *ndp, 91 struct proc *p)); 92 #define spec_create ((int (*) __P(( \ 93 struct nameidata *ndp, \ 94 struct vattr *vap, \ 95 struct proc *p))) spec_badop) 96 #define spec_mknod ((int (*) __P(( \ 97 struct nameidata *ndp, \ 98 struct vattr *vap, \ 99 struct ucred *cred, \ 100 struct proc *p))) spec_badop) 101 int spec_open __P(( 102 struct vnode *vp, 103 int mode, 104 struct ucred *cred, 105 struct proc *p)); 106 int spec_close __P(( 107 struct vnode *vp, 108 int fflag, 109 struct ucred *cred, 110 struct proc *p)); 111 #define spec_access ((int (*) __P(( \ 112 struct vnode *vp, \ 113 int mode, \ 114 struct ucred *cred, \ 115 struct proc *p))) spec_ebadf) 116 #define spec_getattr ((int (*) __P(( \ 117 struct vnode *vp, \ 118 struct vattr *vap, \ 119 struct ucred *cred, \ 120 struct proc *p))) spec_ebadf) 121 #define spec_setattr ((int (*) __P(( \ 122 struct vnode *vp, \ 123 struct vattr *vap, \ 124 struct ucred *cred, \ 125 struct proc *p))) spec_ebadf) 126 int spec_read __P(( 127 struct vnode *vp, 128 struct uio *uio, 129 int ioflag, 130 struct ucred *cred)); 131 int spec_write __P(( 132 struct vnode *vp, 133 struct uio *uio, 134 int ioflag, 135 struct ucred *cred)); 136 int spec_ioctl __P(( 137 struct vnode *vp, 138 int command, 139 caddr_t data, 140 int fflag, 141 struct ucred *cred, 142 struct proc *p)); 143 int spec_select __P(( 144 struct vnode *vp, 145 int which, 146 int fflags, 147 struct ucred *cred, 148 struct proc *p)); 149 #define spec_mmap ((int (*) __P(( \ 150 struct vnode *vp, \ 151 int fflags, \ 152 struct ucred *cred, \ 153 struct proc *p))) spec_badop) 154 #define spec_fsync ((int (*) __P(( \ 155 struct vnode *vp, \ 156 int fflags, \ 157 struct ucred *cred, \ 158 int waitfor, \ 159 struct proc *p))) nullop) 160 #define spec_seek ((int (*) __P(( \ 161 struct vnode *vp, \ 162 off_t oldoff, \ 163 off_t newoff, \ 164 struct ucred *cred))) spec_badop) 165 #define spec_remove ((int (*) __P(( \ 166 struct nameidata *ndp, \ 167 struct proc *p))) spec_badop) 168 #define spec_link ((int (*) __P(( \ 169 struct vnode *vp, \ 170 struct nameidata *ndp, \ 171 struct proc *p))) spec_badop) 172 #define spec_rename ((int (*) __P(( \ 173 struct nameidata *fndp, \ 174 struct nameidata *tdnp, \ 175 struct proc *p))) spec_badop) 176 #define spec_mkdir ((int (*) __P(( \ 177 struct nameidata *ndp, \ 178 struct vattr *vap, \ 179 struct proc *p))) spec_badop) 180 #define spec_rmdir ((int (*) __P(( \ 181 struct nameidata *ndp, \ 182 struct proc *p))) spec_badop) 183 #define spec_symlink ((int (*) __P(( \ 184 struct nameidata *ndp, \ 185 struct vattr *vap, \ 186 char *target, \ 187 struct proc *p))) spec_badop) 188 #define spec_readdir ((int (*) __P(( \ 189 struct vnode *vp, \ 190 struct uio *uio, \ 191 struct ucred *cred, \ 192 int *eofflagp))) spec_badop) 193 #define spec_readlink ((int (*) __P(( \ 194 struct vnode *vp, \ 195 struct uio *uio, \ 196 struct ucred *cred))) spec_badop) 197 #define spec_abortop ((int (*) __P(( \ 198 struct nameidata *ndp))) spec_badop) 199 #define spec_inactive ((int (*) __P(( \ 200 struct vnode *vp, \ 201 struct proc *p))) nullop) 202 #define spec_reclaim ((int (*) __P(( \ 203 struct vnode *vp))) nullop) 204 int spec_lock __P(( 205 struct vnode *vp)); 206 int spec_unlock __P(( 207 struct vnode *vp)); 208 int spec_bmap __P(( 209 struct vnode *vp, 210 daddr_t bn, 211 struct vnode **vpp, 212 daddr_t *bnp)); 213 int spec_strategy __P(( 214 struct buf *bp)); 215 int spec_print __P(( 216 struct vnode *vp)); 217 #define spec_islocked ((int (*) __P(( \ 218 struct vnode *vp))) nullop) 219 int spec_advlock __P(( 220 struct vnode *vp, 221 caddr_t id, 222 int op, 223 struct flock *fl, 224 int flags)); 225 226 #endif /* !_SYS_SPECDEV_H_ */ 227
Indexes created Fri Oct 03 17:10:05 GMT 2025