1 /* 2 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 /* 29 * Copyright (c) 1995, 1998 Apple Computer, Inc. All Rights Reserved. 30 * Copyright (c) 1990, 1993 31 * The Regents of the University of California. All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 1. Redistributions of source code must retain the above copyright 37 * notice, this list of conditions and the following disclaimer. 38 * 2. Redistributions in binary form must reproduce the above copyright 39 * notice, this list of conditions and the following disclaimer in the 40 * documentation and/or other materials provided with the distribution. 41 * 3. All advertising materials mentioning features or use of this software 42 * must display the following acknowledgement: 43 * This product includes software developed by the University of 44 * California, Berkeley and its contributors. 45 * 4. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)specdev.h 8.6 (Berkeley) 5/21/95 62 */ 63 64 #ifndef _MISCFS_SPECFS_SPECDEV_H_ 65 #define _MISCFS_SPECFS_SPECDEV_H_ 66 67 #include <sys/appleapiopts.h> 68 69 #ifdef __APPLE_API_PRIVATE 70 #include <vfs/vfs_support.h> 71 72 /* 73 * This structure defines the information maintained about 74 * special devices. It is allocated in checkalias and freed 75 * in vgone. 76 */ 77 struct specinfo { 78 struct vnode **si_hashchain; 79 struct vnode *si_specnext; 80 long si_flags; 81 dev_t si_rdev; 82 int32_t si_opencount; 83 daddr_t si_size; /* device block size in bytes */ 84 daddr64_t si_lastr; /* last read blkno (read-ahead) */ 85 u_int64_t si_devsize; /* actual device size in bytes */ 86 87 u_int8_t si_initted; 88 u_int8_t si_throttleable; 89 u_int16_t si_isssd; 90 u_int32_t si_devbsdunit; 91 u_int64_t si_throttle_mask; 92 thread_t si_mountingowner; 93 }; 94 /* 95 * Exported shorthand 96 */ 97 #define v_rdev v_specinfo->si_rdev 98 #define v_hashchain v_specinfo->si_hashchain 99 #define v_specnext v_specinfo->si_specnext 100 #define v_specflags v_specinfo->si_flags 101 #define v_specsize v_specinfo->si_size 102 #define v_specdevsize v_specinfo->si_devsize 103 #define v_speclastr v_specinfo->si_lastr 104 105 /* 106 * Flags for specinfo 107 */ 108 #define SI_MOUNTEDON 0x0001 /* block special device is mounted on */ 109 #define SI_ALIASED 0x0002 /* multiple active vnodes refer to this device */ 110 #define SI_MOUNTING 0x0004 /* block special device is getting mounted on */ 111 112 /* 113 * Special device management 114 */ 115 #define SPECHSZ 64 116 #if ((SPECHSZ & (SPECHSZ - 1)) == 0) 117 #define SPECHASH(rdev) (((rdev>>21)+(rdev))&(SPECHSZ-1)) 118 #else 119 #define SPECHASH(rdev) (((unsigned)((rdev>>21)+(rdev)))%SPECHSZ) 120 #endif 121 122 extern struct vnode *speclisth[SPECHSZ]; 123 124 /* 125 * Prototypes for special file operations on vnodes. 126 */ 127 extern int(**spec_vnodeop_p)(void *); 128 struct nameidata; 129 struct componentname; 130 struct flock; 131 struct buf; 132 struct uio; 133 134 __BEGIN_DECLS 135 #ifdef BSD_KERNEL_PRIVATE 136 int spec_blktooff(struct vnop_blktooff_args *); 137 int spec_offtoblk(struct vnop_offtoblk_args *); 138 int spec_fsync_internal(vnode_t, int, vfs_context_t); 139 int spec_blockmap(struct vnop_blockmap_args *); 140 int spec_kqfilter(vnode_t vp, struct knote *kn, struct kevent_qos_s *kev); 141 #endif /* BSD_KERNEL_PRIVATE */ 142 143 int spec_ebadf(void *); 144 145 int spec_lookup(struct vnop_lookup_args *); 146 #define spec_create (int (*) (struct vnop_access_args *))err_create 147 #define spec_mknod (int (*) (struct vnop_access_args *))err_mknod 148 int spec_open(struct vnop_open_args *); 149 int spec_close(struct vnop_close_args *); 150 #define spec_access (int (*) (struct vnop_access_args *))spec_ebadf 151 #define spec_getattr (int (*) (struct vnop_getattr_args *))spec_ebadf 152 #define spec_setattr (int (*) (struct vnop_setattr_args *))spec_ebadf 153 int spec_read(struct vnop_read_args *); 154 int spec_write(struct vnop_write_args *); 155 int spec_ioctl(struct vnop_ioctl_args *); 156 int spec_select(struct vnop_select_args *); 157 #define spec_revoke (int (*) (struct vnop_access_args *))nop_revoke 158 #define spec_mmap (int (*) (struct vnop_access_args *))err_mmap 159 int spec_fsync(struct vnop_fsync_args *); 160 #define spec_remove (int (*) (struct vnop_access_args *))err_remove 161 #define spec_link (int (*) (struct vnop_access_args *))err_link 162 #define spec_rename (int (*) (struct vnop_access_args *))err_rename 163 #define spec_mkdir (int (*) (struct vnop_access_args *))err_mkdir 164 #define spec_rmdir (int (*) (struct vnop_access_args *))err_rmdir 165 #define spec_symlink (int (*) (struct vnop_access_args *))err_symlink 166 #define spec_readdir (int (*) (struct vnop_access_args *))err_readdir 167 #define spec_readlink (int (*) (struct vnop_access_args *))err_readlink 168 #define spec_inactive (int (*) (struct vnop_access_args *))nop_inactive 169 #define spec_reclaim (int (*) (struct vnop_access_args *))nop_reclaim 170 #define spec_lock (int (*) (struct vnop_access_args *))nop_lock 171 #define spec_unlock (int (*)(struct vnop_access_args *))nop_unlock 172 int spec_strategy(struct vnop_strategy_args *); 173 #define spec_islocked (int (*) (struct vnop_access_args *))nop_islocked 174 int spec_pathconf(struct vnop_pathconf_args *); 175 #define spec_advlock (int (*) (struct vnop_access_args *))err_advlock 176 #define spec_blkatoff (int (*) (struct vnop_access_args *))err_blkatoff 177 #define spec_valloc (int (*) (struct vnop_access_args *))err_valloc 178 #define spec_vfree (int (*) (struct vnop_access_args *))err_vfree 179 #define spec_bwrite (int (*) (struct vnop_bwrite_args *))nop_bwrite 180 __END_DECLS 181 182 #endif /* __APPLE_API_PRIVATE */ 183 #endif /* _MISCFS_SPECFS_SPECDEV_H_ */ 184