183 lines
7.6 KiB
C
183 lines
7.6 KiB
C
/*
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* Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (c) 1995, 1998 Apple Computer, Inc. All Rights Reserved.
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)specdev.h 8.6 (Berkeley) 5/21/95
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*/
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#ifndef _MISCFS_SPECFS_SPECDEV_H_
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#define _MISCFS_SPECFS_SPECDEV_H_
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#include <sys/appleapiopts.h>
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#ifdef __APPLE_API_PRIVATE
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#include <vfs/vfs_support.h>
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/*
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* This structure defines the information maintained about
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* special devices. It is allocated in checkalias and freed
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* in vgone.
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*/
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struct specinfo {
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struct vnode **si_hashchain;
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struct vnode *si_specnext;
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long si_flags;
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dev_t si_rdev;
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int32_t si_opencount;
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daddr_t si_size; /* device block size in bytes */
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daddr64_t si_lastr; /* last read blkno (read-ahead) */
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u_int64_t si_devsize; /* actual device size in bytes */
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u_int8_t si_initted;
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u_int8_t si_throttleable;
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u_int16_t si_isssd;
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u_int32_t si_devbsdunit;
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u_int64_t si_throttle_mask;
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thread_t si_mountingowner;
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};
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/*
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* Exported shorthand
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*/
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#define v_rdev v_specinfo->si_rdev
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#define v_hashchain v_specinfo->si_hashchain
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#define v_specnext v_specinfo->si_specnext
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#define v_specflags v_specinfo->si_flags
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#define v_specsize v_specinfo->si_size
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#define v_specdevsize v_specinfo->si_devsize
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#define v_speclastr v_specinfo->si_lastr
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/*
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* Flags for specinfo
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*/
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#define SI_MOUNTEDON 0x0001 /* block special device is mounted on */
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#define SI_ALIASED 0x0002 /* multiple active vnodes refer to this device */
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#define SI_MOUNTING 0x0004 /* block special device is getting mounted on */
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/*
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* Special device management
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*/
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#define SPECHSZ 64
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#if ((SPECHSZ & (SPECHSZ - 1)) == 0)
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#define SPECHASH(rdev) (((rdev>>21)+(rdev))&(SPECHSZ-1))
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#else
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#define SPECHASH(rdev) (((unsigned)((rdev>>21)+(rdev)))%SPECHSZ)
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#endif
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extern struct vnode *speclisth[SPECHSZ];
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/*
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* Prototypes for special file operations on vnodes.
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*/
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extern int(**spec_vnodeop_p)(void *);
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struct nameidata;
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struct componentname;
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struct flock;
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struct buf;
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struct uio;
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__BEGIN_DECLS
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#ifdef BSD_KERNEL_PRIVATE
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int spec_blktooff(struct vnop_blktooff_args *);
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int spec_offtoblk(struct vnop_offtoblk_args *);
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int spec_fsync_internal(vnode_t, int, vfs_context_t);
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int spec_blockmap(struct vnop_blockmap_args *);
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int spec_kqfilter(vnode_t vp, struct knote *kn, struct kevent_qos_s *kev);
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#endif /* BSD_KERNEL_PRIVATE */
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int spec_ebadf(void *);
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int spec_lookup(struct vnop_lookup_args *);
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#define spec_create (int (*) (struct vnop_access_args *))err_create
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#define spec_mknod (int (*) (struct vnop_access_args *))err_mknod
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int spec_open(struct vnop_open_args *);
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int spec_close(struct vnop_close_args *);
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#define spec_access (int (*) (struct vnop_access_args *))spec_ebadf
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#define spec_getattr (int (*) (struct vnop_getattr_args *))spec_ebadf
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#define spec_setattr (int (*) (struct vnop_setattr_args *))spec_ebadf
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int spec_read(struct vnop_read_args *);
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int spec_write(struct vnop_write_args *);
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int spec_ioctl(struct vnop_ioctl_args *);
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int spec_select(struct vnop_select_args *);
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#define spec_revoke (int (*) (struct vnop_access_args *))nop_revoke
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#define spec_mmap (int (*) (struct vnop_access_args *))err_mmap
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int spec_fsync(struct vnop_fsync_args *);
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#define spec_remove (int (*) (struct vnop_access_args *))err_remove
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#define spec_link (int (*) (struct vnop_access_args *))err_link
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#define spec_rename (int (*) (struct vnop_access_args *))err_rename
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#define spec_mkdir (int (*) (struct vnop_access_args *))err_mkdir
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#define spec_rmdir (int (*) (struct vnop_access_args *))err_rmdir
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#define spec_symlink (int (*) (struct vnop_access_args *))err_symlink
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#define spec_readdir (int (*) (struct vnop_access_args *))err_readdir
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#define spec_readlink (int (*) (struct vnop_access_args *))err_readlink
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#define spec_inactive (int (*) (struct vnop_access_args *))nop_inactive
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#define spec_reclaim (int (*) (struct vnop_access_args *))nop_reclaim
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#define spec_lock (int (*) (struct vnop_access_args *))nop_lock
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#define spec_unlock (int (*)(struct vnop_access_args *))nop_unlock
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int spec_strategy(struct vnop_strategy_args *);
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#define spec_islocked (int (*) (struct vnop_access_args *))nop_islocked
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int spec_pathconf(struct vnop_pathconf_args *);
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#define spec_advlock (int (*) (struct vnop_access_args *))err_advlock
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#define spec_blkatoff (int (*) (struct vnop_access_args *))err_blkatoff
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#define spec_valloc (int (*) (struct vnop_access_args *))err_valloc
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#define spec_vfree (int (*) (struct vnop_access_args *))err_vfree
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#define spec_bwrite (int (*) (struct vnop_bwrite_args *))nop_bwrite
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__END_DECLS
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#endif /* __APPLE_API_PRIVATE */
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#endif /* _MISCFS_SPECFS_SPECDEV_H_ */
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