1 /* $NetBSD: specdev.h,v 1.33 2007/10/07 13:39:04 hannken 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 spec_cow_entry { 42 SLIST_ENTRY(spec_cow_entry) ce_list; 43 int (*ce_func)(void *, struct buf *); 44 void *ce_cookie; 45 }; 46 47 struct specinfo { 48 struct vnode **si_hashchain; 49 struct vnode *si_specnext; 50 struct mount *si_mountpoint; 51 dev_t si_rdev; 52 struct lockf *si_lockf; 53 }; 54 /* 55 * Exported shorthand 56 */ 57 #define v_rdev v_specinfo->si_rdev 58 #define v_hashchain v_specinfo->si_hashchain 59 #define v_specnext v_specinfo->si_specnext 60 #define v_speclockf v_specinfo->si_lockf 61 #define v_specmountpoint v_specinfo->si_mountpoint 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 extern struct vnode *speclisth[SPECHSZ]; 74 75 /* 76 * Prototypes for special file operations on vnodes. 77 */ 78 extern int (**spec_vnodeop_p)(void *); 79 struct nameidata; 80 struct componentname; 81 struct flock; 82 struct buf; 83 struct uio; 84 85 int spec_lookup(void *); 86 #define spec_create genfs_badop 87 #define spec_mknod genfs_badop 88 int spec_open(void *); 89 int spec_close(void *); 90 #define spec_access genfs_ebadf 91 #define spec_getattr genfs_ebadf 92 #define spec_setattr genfs_ebadf 93 int spec_read(void *); 94 int spec_write(void *); 95 #define spec_lease_check genfs_nullop 96 #define spec_fcntl genfs_fcntl 97 int spec_ioctl(void *); 98 int spec_poll(void *); 99 int spec_kqfilter(void *); 100 #define spec_revoke genfs_revoke 101 int spec_mmap(void *); 102 int spec_fsync(void *); 103 #define spec_seek genfs_nullop /* XXX should query device */ 104 #define spec_remove genfs_badop 105 #define spec_link genfs_badop 106 #define spec_rename genfs_badop 107 #define spec_mkdir genfs_badop 108 #define spec_rmdir genfs_badop 109 #define spec_symlink genfs_badop 110 #define spec_readdir genfs_badop 111 #define spec_readlink genfs_badop 112 #define spec_abortop genfs_badop 113 #define spec_reclaim genfs_nullop 114 int spec_inactive(void *); 115 #define spec_lock genfs_nolock 116 #define spec_unlock genfs_nounlock 117 int spec_bmap(void *); 118 int spec_strategy(void *); 119 int spec_print(void *); 120 #define spec_islocked genfs_noislocked 121 int spec_pathconf(void *); 122 int spec_advlock(void *); 123 #define spec_bwrite vn_bwrite 124 #define spec_getpages genfs_getpages 125 #define spec_putpages genfs_putpages 126 127 #endif /* _MISCFS_SPECFS_SPECDEV_H_ */ 128