/*      $NetBSD: tmpfs.c,v 1.11 2017/06/09 00:13:29 chs Exp $   */

/*-
* Copyright (c) 2006 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.
*/

#include <sys/cdefs.h>
__RCSID("$NetBSD: tmpfs.c,v 1.11 2017/06/09 00:13:29 chs Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#define __EXPOSE_MOUNT
#include <sys/mount.h>

#include <fs/tmpfs/tmpfs.h>

#include <err.h>
#include <kvm.h>
#include "fstat.h"

int
tmpfs_filestat(struct vnode *vp, struct filestat *fsp)
{
       struct tmpfs_node tn;
       struct mount mt;

       if (!KVM_READ(VP_TO_TMPFS_NODE(vp), &tn, sizeof(tn))) {
               dprintf("can't read tmpfs_node at %p for pid %d",
                   VP_TO_TMPFS_NODE(vp), Pid);
               return 0;
       }
       if (!KVM_READ(vp->v_mount, &mt, sizeof(mt))) {
               dprintf("can't read mount at %p for pid %d",
                   vp->v_mount, Pid);
               return 0;
       }

       fsp->fsid = mt.mnt_stat.f_fsidx.__fsid_val[0];
       fsp->fileid = tn.tn_id;
       fsp->mode = tn.tn_mode | getftype(vp->v_type);
       fsp->size = tn.tn_size;
       switch (tn.tn_type) {
       case VBLK:
       case VCHR:
               fsp->rdev = tn.tn_spec.tn_dev.tn_rdev;
               break;
       default:
               fsp->rdev = 0;
               break;
       }

       return 1;
}