162 lines
5.5 KiB
C
162 lines
5.5 KiB
C
/* $NetBSD: specdev.h,v 1.39 2009/11/14 18:36:57 elad Exp $ */
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/*-
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* Copyright (c) 2008 The NetBSD Foundation, Inc.
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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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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#include <sys/mutex.h>
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#include <sys/vnode.h>
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typedef struct specnode {
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vnode_t *sn_next;
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struct specdev *sn_dev;
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u_int sn_opencnt;
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dev_t sn_rdev;
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bool sn_gone;
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} specnode_t;
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typedef struct specdev {
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struct mount *sd_mountpoint;
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struct lockf *sd_lockf;
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vnode_t *sd_bdevvp;
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u_int sd_opencnt;
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u_int sd_refcnt;
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dev_t sd_rdev;
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} specdev_t;
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/*
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* Exported shorthand
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*/
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#define v_specnext v_specnode->sn_next
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#define v_rdev v_specnode->sn_rdev
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#define v_speclockf v_specnode->sn_dev->sd_lockf
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#define v_specmountpoint v_specnode->sn_dev->sd_mountpoint
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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 vnode_t *specfs_hash[SPECHSZ];
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void spec_node_init(vnode_t *, dev_t);
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void spec_node_destroy(vnode_t *);
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void spec_node_revoke(vnode_t *);
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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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int spec_lookup(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(void *);
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int spec_close(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(void *);
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int spec_write(void *);
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#define spec_fcntl genfs_fcntl
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int spec_ioctl(void *);
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int spec_poll(void *);
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int spec_kqfilter(void *);
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#define spec_revoke genfs_revoke
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int spec_mmap(void *);
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int spec_fsync(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(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(void *);
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int spec_strategy(void *);
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int spec_print(void *);
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#define spec_islocked genfs_noislocked
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int spec_pathconf(void *);
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int spec_advlock(void *);
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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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bool iskmemvp(struct vnode *);
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void spec_init(void);
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#endif /* _MISCFS_SPECFS_SPECDEV_H_ */
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