80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
/* $NetBSD: tmpfs.c,v 1.11 2017/06/09 00:13:29 chs Exp $ */
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/*-
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* Copyright (c) 2006 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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#include <sys/cdefs.h>
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__RCSID("$NetBSD: tmpfs.c,v 1.11 2017/06/09 00:13:29 chs Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/proc.h>
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#include <sys/stat.h>
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#include <sys/vnode.h>
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#define __EXPOSE_MOUNT
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#include <sys/mount.h>
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#include <fs/tmpfs/tmpfs.h>
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#include <err.h>
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#include <kvm.h>
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#include "fstat.h"
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int
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tmpfs_filestat(struct vnode *vp, struct filestat *fsp)
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{
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struct tmpfs_node tn;
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struct mount mt;
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if (!KVM_READ(VP_TO_TMPFS_NODE(vp), &tn, sizeof(tn))) {
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dprintf("can't read tmpfs_node at %p for pid %d",
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VP_TO_TMPFS_NODE(vp), Pid);
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return 0;
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}
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if (!KVM_READ(vp->v_mount, &mt, sizeof(mt))) {
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dprintf("can't read mount at %p for pid %d",
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vp->v_mount, Pid);
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return 0;
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}
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fsp->fsid = mt.mnt_stat.f_fsidx.__fsid_val[0];
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fsp->fileid = tn.tn_id;
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fsp->mode = tn.tn_mode | getftype(vp->v_type);
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fsp->size = tn.tn_size;
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switch (tn.tn_type) {
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case VBLK:
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case VCHR:
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fsp->rdev = tn.tn_spec.tn_dev.tn_rdev;
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break;
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default:
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fsp->rdev = 0;
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break;
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}
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return 1;
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}
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