specdev.h revision 1.2
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 * @(#)specdev.h 7.4 (Berkeley) 4/19/91 34 */ 35 36 #ifndef _SYS_SPECDEV_H_ 37 #define _SYS_SPECDEV_H_ 38 39 /* 40 * This structure defines the information maintained about 41 * special devices. It is allocated in checkalias and freed 42 * in vgone. 43 */ 44 struct specinfo { 45 struct vnode **si_hashchain; 46 struct vnode *si_specnext; 47 long si_flags; 48 dev_t si_rdev; 49 }; 50 /* 51 * Exported shorthand 52 */ 53 #define v_rdev v_specinfo->si_rdev 54 #define v_hashchain v_specinfo->si_hashchain 55 #define v_specnext v_specinfo->si_specnext 56 #define v_specflags v_specinfo->si_flags 57 58 /* 59 * Flags for specinfo 60 */ 61 #define SI_MOUNTEDON 0x0001 /* block special device is mounted on */ 62 63 /* 64 * Special device management 65 */ 66 #define SPECHSZ 64 67 #if ((SPECHSZ&(SPECHSZ-1)) == 0) 68 #define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1)) 69 #else 70 #define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ) 71 #endif 72 73 struct vnode *speclisth[SPECHSZ]; 74 75 /* 76 * Prototypes for special file operations on vnodes. 77 */ 78 struct nameidata; 79 struct ucred; 80 struct flock; 81 struct buf; 82 struct uio; 83 84 int spec_badop(), 85 spec_ebadf(); 86 87 int spec_lookup __P(( 88 struct vnode *vp, 89 struct nameidata *ndp, 90 struct proc *p)); 91 #define spec_create ((int (*) __P(( \ 92 struct nameidata *ndp, \ 93 struct vattr *vap, \ 94 struct proc *p))) spec_badop) 95 #define spec_mknod ((int (*) __P(( \ 96 struct nameidata *ndp, \ 97 struct vattr *vap, \ 98 struct ucred *cred, \ 99 struct proc *p))) spec_badop) 100 int spec_open __P(( 101 struct vnode *vp, 102 int mode, 103 struct ucred *cred, 104 struct proc *p)); 105 int spec_close __P(( 106 struct vnode *vp, 107 int fflag, 108 struct ucred *cred, 109 struct proc *p)); 110 #define spec_access ((int (*) __P(( \ 111 struct vnode *vp, \ 112 int mode, \ 113 struct ucred *cred, \ 114 struct proc *p))) spec_ebadf) 115 #define spec_getattr ((int (*) __P(( \ 116 struct vnode *vp, \ 117 struct vattr *vap, \ 118 struct ucred *cred, \ 119 struct proc *p))) spec_ebadf) 120 #define spec_setattr ((int (*) __P(( \ 121 struct vnode *vp, \ 122 struct vattr *vap, \ 123 struct ucred *cred, \ 124 struct proc *p))) spec_ebadf) 125 int spec_read __P(( 126 struct vnode *vp, 127 struct uio *uio, 128 int ioflag, 129 struct ucred *cred)); 130 int spec_write __P(( 131 struct vnode *vp, 132 struct uio *uio, 133 int ioflag, 134 struct ucred *cred)); 135 int spec_ioctl __P(( 136 struct vnode *vp, 137 int command, 138 caddr_t data, 139 int fflag, 140 struct ucred *cred, 141 struct proc *p)); 142 int spec_select __P(( 143 struct vnode *vp, 144 int which, 145 int fflags, 146 struct ucred *cred, 147 struct proc *p)); 148 #define spec_mmap ((int (*) __P(( \ 149 struct vnode *vp, \ 150 int fflags, \ 151 struct ucred *cred, \ 152 struct proc *p))) spec_badop) 153 #define spec_fsync ((int (*) __P(( \ 154 struct vnode *vp, \ 155 int fflags, \ 156 struct ucred *cred, \ 157 int waitfor, \ 158 struct proc *p))) nullop) 159 #define spec_seek ((int (*) __P(( \ 160 struct vnode *vp, \ 161 off_t oldoff, \ 162 off_t newoff, \ 163 struct ucred *cred))) spec_badop) 164 #define spec_remove ((int (*) __P(( \ 165 struct nameidata *ndp, \ 166 struct proc *p))) spec_badop) 167 #define spec_link ((int (*) __P(( \ 168 struct vnode *vp, \ 169 struct nameidata *ndp, \ 170 struct proc *p))) spec_badop) 171 #define spec_rename ((int (*) __P(( \ 172 struct nameidata *fndp, \ 173 struct nameidata *tdnp, \ 174 struct proc *p))) spec_badop) 175 #define spec_mkdir ((int (*) __P(( \ 176 struct nameidata *ndp, \ 177 struct vattr *vap, \ 178 struct proc *p))) spec_badop) 179 #define spec_rmdir ((int (*) __P(( \ 180 struct nameidata *ndp, \ 181 struct proc *p))) spec_badop) 182 #define spec_symlink ((int (*) __P(( \ 183 struct nameidata *ndp, \ 184 struct vattr *vap, \ 185 char *target, \ 186 struct proc *p))) spec_badop) 187 #define spec_readdir ((int (*) __P(( \ 188 struct vnode *vp, \ 189 struct uio *uio, \ 190 struct ucred *cred, \ 191 int *eofflagp))) spec_badop) 192 #define spec_readlink ((int (*) __P(( \ 193 struct vnode *vp, \ 194 struct uio *uio, \ 195 struct ucred *cred))) spec_badop) 196 #define spec_abortop ((int (*) __P(( \ 197 struct nameidata *ndp))) spec_badop) 198 #define spec_inactive ((int (*) __P(( \ 199 struct vnode *vp, \ 200 struct proc *p))) nullop) 201 #define spec_reclaim ((int (*) __P(( \ 202 struct vnode *vp))) nullop) 203 int spec_lock __P(( 204 struct vnode *vp)); 205 int spec_unlock __P(( 206 struct vnode *vp)); 207 int spec_bmap __P(( 208 struct vnode *vp, 209 daddr_t bn, 210 struct vnode **vpp, 211 daddr_t *bnp)); 212 int spec_strategy __P(( 213 struct buf *bp)); 214 int spec_print __P(( 215 struct vnode *vp)); 216 #define spec_islocked ((int (*) __P(( \ 217 struct vnode *vp))) nullop) 218 int spec_advlock __P(( 219 struct vnode *vp, 220 caddr_t id, 221 int op, 222 struct flock *fl, 223 int flags)); 224 225 #endif /* !_SYS_SPECDEV_H_ */ 226
Indexes created Fri Oct 03 17:10:05 GMT 2025