specdev.h revision 1.25
1 /* $NetBSD: specdev.h,v 1.25 2004/02/14 00:00:56 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 void (*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 struct simplelock si_cow_slock; 54 SLIST_HEAD(, spec_cow_entry) si_cow_head; 55 int si_cow_req; 56 int si_cow_count; 57 }; 58 /* 59 * Exported shorthand 60 */ 61 #define v_rdev v_specinfo->si_rdev 62 #define v_hashchain v_specinfo->si_hashchain 63 #define v_specnext v_specinfo->si_specnext 64 #define v_speclockf v_specinfo->si_lockf 65 #define v_specmountpoint v_specinfo->si_mountpoint 66 #define v_spec_cow_slock v_specinfo->si_cow_slock 67 #define v_spec_cow_head v_specinfo->si_cow_head 68 #define v_spec_cow_req v_specinfo->si_cow_req 69 #define v_spec_cow_count v_specinfo->si_cow_count 70 71 #define SPEC_COW_LOCK(si, s) \ 72 do { \ 73 (s) = splbio(); \ 74 simple_lock(&(si)->si_cow_slock) ; \ 75 } while (/*CONSTCOND*/0) 76 77 #define SPEC_COW_UNLOCK(si, s) \ 78 do { \ 79 simple_unlock(&(si)->si_cow_slock) ; \ 80 splx((s)); \ 81 } while (/*CONSTCOND*/0) 82 83 /* 84 * Special device management 85 */ 86 #define SPECHSZ 64 87 #if ((SPECHSZ&(SPECHSZ-1)) == 0) 88 #define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1)) 89 #else 90 #define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ) 91 #endif 92 93 extern struct vnode *speclisth[SPECHSZ]; 94 95 /* 96 * Prototypes for special file operations on vnodes. 97 */ 98 extern int (**spec_vnodeop_p) __P((void *)); 99 struct nameidata; 100 struct componentname; 101 struct ucred; 102 struct flock; 103 struct buf; 104 struct uio; 105 106 int spec_lookup __P((void *)); 107 #define spec_create genfs_badop 108 #define spec_mknod genfs_badop 109 int spec_open __P((void *)); 110 int spec_close __P((void *)); 111 #define spec_access genfs_ebadf 112 #define spec_getattr genfs_ebadf 113 #define spec_setattr genfs_ebadf 114 int spec_read __P((void *)); 115 int spec_write __P((void *)); 116 #define spec_lease_check genfs_nullop 117 #define spec_fcntl genfs_fcntl 118 int spec_ioctl __P((void *)); 119 int spec_poll __P((void *)); 120 int spec_kqfilter __P((void *)); 121 #define spec_revoke genfs_revoke 122 #define spec_mmap genfs_mmap 123 int spec_fsync __P((void *)); 124 #define spec_seek genfs_nullop /* XXX should query device */ 125 #define spec_remove genfs_badop 126 #define spec_link genfs_badop 127 #define spec_rename genfs_badop 128 #define spec_mkdir genfs_badop 129 #define spec_rmdir genfs_badop 130 #define spec_symlink genfs_badop 131 #define spec_readdir genfs_badop 132 #define spec_readlink genfs_badop 133 #define spec_abortop genfs_badop 134 #define spec_reclaim genfs_nullop 135 int spec_inactive __P((void *)); 136 #define spec_lock genfs_nolock 137 #define spec_unlock genfs_nounlock 138 int spec_bmap __P((void *)); 139 int spec_strategy __P((void *)); 140 int spec_print __P((void *)); 141 #define spec_islocked genfs_noislocked 142 int spec_pathconf __P((void *)); 143 int spec_advlock __P((void *)); 144 #define spec_blkatoff genfs_badop 145 #define spec_valloc genfs_badop 146 #define spec_reallocblks genfs_badop 147 #define spec_vfree genfs_badop 148 #define spec_truncate genfs_nullop 149 #define spec_update genfs_nullop 150 #define spec_bwrite vn_bwrite 151 #define spec_getpages genfs_getpages 152 #define spec_putpages genfs_putpages 153 int spec_size __P((void *)); 154 155 #endif /* _MISCFS_SPECFS_SPECDEV_H_ */ 156
Indexes created Sun Sep 21 18:09:52 GMT 2025