/* $NetBSD: specdev.h,v 1.36 2008/04/28 20:24:08 martin Exp $ */ /*- * Copyright (c) 2008 The NetBSD Foundation, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)specdev.h 8.6 (Berkeley) 5/21/95 */ #ifndef _MISCFS_SPECFS_SPECDEV_H_ #define _MISCFS_SPECFS_SPECDEV_H_ #include <sys/mutex.h> #include <sys/vnode.h> typedef struct specnode { vnode_t *sn_next; struct specdev *sn_dev; u_int sn_opencnt; dev_t sn_rdev; bool sn_gone; } specnode_t; typedef struct specdev { struct mount *sd_mountpoint; struct lockf *sd_lockf; vnode_t *sd_bdevvp; u_int sd_opencnt; u_int sd_refcnt; dev_t sd_rdev; } specdev_t; /* * Exported shorthand */ #define v_specnext v_specnode->sn_next #define v_rdev v_specnode->sn_rdev #define v_speclockf v_specnode->sn_dev->sd_lockf #define v_specmountpoint v_specnode->sn_dev->sd_mountpoint /* * Special device management */ #define SPECHSZ 64 #if ((SPECHSZ&(SPECHSZ-1)) == 0) #define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1)) #else #define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ) #endif extern vnode_t *specfs_hash[SPECHSZ]; extern kmutex_t specfs_lock; void spec_node_init(vnode_t *, dev_t); void spec_node_destroy(vnode_t *); void spec_node_revoke(vnode_t *); /* * Prototypes for special file operations on vnodes. */ extern int (**spec_vnodeop_p)(void *); struct nameidata; struct componentname; struct flock; struct buf; struct uio; int spec_lookup(void *); #define spec_create genfs_badop #define spec_mknod genfs_badop int spec_open(void *); int spec_close(void *); #define spec_access genfs_ebadf #define spec_getattr genfs_ebadf #define spec_setattr genfs_ebadf int spec_read(void *); int spec_write(void *); #define spec_fcntl genfs_fcntl int spec_ioctl(void *); int spec_poll(void *); int spec_kqfilter(void *); #define spec_revoke genfs_revoke int spec_mmap(void *); int spec_fsync(void *); #define spec_seek genfs_nullop /* XXX should query device */ #define spec_remove genfs_badop #define spec_link genfs_badop #define spec_rename genfs_badop #define spec_mkdir genfs_badop #define spec_rmdir genfs_badop #define spec_symlink genfs_badop #define spec_readdir genfs_badop #define spec_readlink genfs_badop #define spec_abortop genfs_badop #define spec_reclaim genfs_nullop int spec_inactive(void *); #define spec_lock genfs_nolock #define spec_unlock genfs_nounlock int spec_bmap(void *); int spec_strategy(void *); int spec_print(void *); #define spec_islocked genfs_noislocked int spec_pathconf(void *); int spec_advlock(void *); #define spec_bwrite vn_bwrite #define spec_getpages genfs_getpages #define spec_putpages genfs_putpages #endif /* _MISCFS_SPECFS_SPECDEV_H_ */