116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/* $NetBSD: dead_vfsops.c,v 1.7 2015/07/01 08:13:53 hannken Exp $ */
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/*-
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* Copyright (c) 2014 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Juergen Hannken-Illjes.
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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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: dead_vfsops.c,v 1.7 2015/07/01 08:13:53 hannken Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <miscfs/specfs/specdev.h>
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VFS_PROTOS(dead);
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static void dead_panic(void);
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extern const struct vnodeopv_desc dead_vnodeop_opv_desc;
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static const struct vnodeopv_desc * const dead_vnodeopv_descs[] = {
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&dead_vnodeop_opv_desc,
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NULL
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};
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struct mount *dead_rootmount;
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struct vfsops dead_vfsops = {
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.vfs_name = "dead",
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.vfs_min_mount_data = 0,
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.vfs_mount = (void *)dead_panic,
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.vfs_start = (void *)dead_panic,
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.vfs_unmount = (void *)dead_panic,
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.vfs_root = (void *)dead_panic,
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.vfs_quotactl = (void *)dead_panic,
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.vfs_statvfs = (void *)dead_panic,
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.vfs_sync = (void *)dead_panic,
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.vfs_vget = (void *)dead_panic,
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.vfs_loadvnode = (void *)dead_panic,
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.vfs_newvnode = dead_newvnode,
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.vfs_fhtovp = (void *)dead_panic,
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.vfs_vptofh = (void *)dead_panic,
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.vfs_init = (void *)dead_panic,
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.vfs_reinit = (void *)dead_panic,
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.vfs_done = (void *)dead_panic,
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.vfs_mountroot = (void *)dead_panic,
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.vfs_snapshot = (void *)dead_panic,
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.vfs_extattrctl = (void *)dead_panic,
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.vfs_suspendctl = (void *)dead_panic,
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.vfs_renamelock_enter = (void *)dead_panic,
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.vfs_renamelock_exit = (void *)dead_panic,
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.vfs_fsync = (void *)eopnotsupp,
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.vfs_opv_descs = dead_vnodeopv_descs
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};
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static void
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dead_panic(void)
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{
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panic("dead fs operation used");
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}
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/*
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* Create a new anonymous device vnode.
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*/
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int
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dead_newvnode(struct mount *mp, struct vnode *dvp, struct vnode *vp,
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struct vattr *vap, kauth_cred_t cred,
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size_t *key_len, const void **new_key)
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{
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KASSERT(mp == dead_rootmount);
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KASSERT(dvp == NULL);
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KASSERT(vap->va_type == VCHR || vap->va_type == VBLK);
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KASSERT(vap->va_rdev != VNOVAL);
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vp->v_tag = VT_NON;
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vp->v_type = vap->va_type;
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vp->v_op = spec_vnodeop_p;
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vp->v_vflag |= VV_MPSAFE;
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uvm_vnp_setsize(vp, 0);
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spec_node_init(vp, vap->va_rdev);
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*key_len = sizeof(vp->v_interlock);
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*new_key = &vp->v_interlock;
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return 0;
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}
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