156 lines
4.9 KiB
C
156 lines
4.9 KiB
C
/* $NetBSD: specdev.h,v 1.26 2004/05/25 14:54:58 hannken Exp $ */
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/*
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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. 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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/*
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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 spec_cow_entry {
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SLIST_ENTRY(spec_cow_entry) ce_list;
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int (*ce_func)(void *, struct buf *);
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void *ce_cookie;
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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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struct mount *si_mountpoint;
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dev_t si_rdev;
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struct lockf *si_lockf;
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struct simplelock si_cow_slock;
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SLIST_HEAD(, spec_cow_entry) si_cow_head;
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int si_cow_req;
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int si_cow_count;
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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_speclockf v_specinfo->si_lockf
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#define v_specmountpoint v_specinfo->si_mountpoint
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#define v_spec_cow_slock v_specinfo->si_cow_slock
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#define v_spec_cow_head v_specinfo->si_cow_head
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#define v_spec_cow_req v_specinfo->si_cow_req
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#define v_spec_cow_count v_specinfo->si_cow_count
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#define SPEC_COW_LOCK(si, s) \
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do { \
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(s) = splbio(); \
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simple_lock(&(si)->si_cow_slock) ; \
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} while (/*CONSTCOND*/0)
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#define SPEC_COW_UNLOCK(si, s) \
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do { \
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simple_unlock(&(si)->si_cow_slock) ; \
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splx((s)); \
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} while (/*CONSTCOND*/0)
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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>>5)+(rdev))&(SPECHSZ-1))
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#else
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#define SPECHASH(rdev) (((unsigned)((rdev>>5)+(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) __P((void *));
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struct nameidata;
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struct componentname;
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struct ucred;
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struct flock;
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struct buf;
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struct uio;
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int spec_lookup __P((void *));
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#define spec_create genfs_badop
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#define spec_mknod genfs_badop
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int spec_open __P((void *));
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int spec_close __P((void *));
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#define spec_access genfs_ebadf
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#define spec_getattr genfs_ebadf
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#define spec_setattr genfs_ebadf
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int spec_read __P((void *));
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int spec_write __P((void *));
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#define spec_lease_check genfs_nullop
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#define spec_fcntl genfs_fcntl
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int spec_ioctl __P((void *));
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int spec_poll __P((void *));
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int spec_kqfilter __P((void *));
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#define spec_revoke genfs_revoke
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#define spec_mmap genfs_mmap
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int spec_fsync __P((void *));
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#define spec_seek genfs_nullop /* XXX should query device */
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#define spec_remove genfs_badop
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#define spec_link genfs_badop
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#define spec_rename genfs_badop
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#define spec_mkdir genfs_badop
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#define spec_rmdir genfs_badop
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#define spec_symlink genfs_badop
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#define spec_readdir genfs_badop
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#define spec_readlink genfs_badop
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#define spec_abortop genfs_badop
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#define spec_reclaim genfs_nullop
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int spec_inactive __P((void *));
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#define spec_lock genfs_nolock
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#define spec_unlock genfs_nounlock
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int spec_bmap __P((void *));
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int spec_strategy __P((void *));
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int spec_print __P((void *));
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#define spec_islocked genfs_noislocked
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int spec_pathconf __P((void *));
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int spec_advlock __P((void *));
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#define spec_blkatoff genfs_badop
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#define spec_valloc genfs_badop
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#define spec_reallocblks genfs_badop
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#define spec_vfree genfs_badop
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#define spec_truncate genfs_nullop
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#define spec_update genfs_nullop
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#define spec_bwrite vn_bwrite
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#define spec_getpages genfs_getpages
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#define spec_putpages genfs_putpages
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int spec_size __P((void *));
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#endif /* _MISCFS_SPECFS_SPECDEV_H_ */
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