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      1 /*	$NetBSD: zfs.c,v 1.1 2022/06/19 11:31:19 simonb Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2022 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Simon Burge.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __RCSID("$NetBSD: zfs.c,v 1.1 2022/06/19 11:31:19 simonb Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/time.h>
     37 #include <sys/vnode.h>
     38 #define __EXPOSE_MOUNT
     39 #include <sys/mount.h>
     40 
     41 #include "zfs_znode.h"
     42 
     43 #include <kvm.h>
     44 #include <err.h>
     45 #include "fstat.h"
     46 
     47 int
     48 zfs_filestat(struct vnode *vp, struct filestat *fsp)
     49 {
     50 	znode_t inode;
     51 	struct mount mt;
     52 
     53 	if (!KVM_READ(VTOZ(vp), &inode, sizeof (inode))) {
     54 		dprintf("can't read inode at %p for pid %d", VTOZ(vp), Pid);
     55 		return 0;
     56 	}
     57 	if (!KVM_READ(vp->v_mount, &mt, sizeof(mt))) {
     58 		dprintf("can't read mount at %p for pid %d",
     59 		    vp->v_mount, Pid);
     60 		return 0;
     61 	}
     62 	/*
     63 	 * XXX: fsid should be something like
     64 	 *    ((struct zfsvfs *)vp->v_mount->mnt_data)->
     65 	 *    z_os->os_ds_dataset->ds_fsid_guid
     66 	 * but ZFS headers are pretty much impossible to include
     67 	 * from userland.
     68 	 */
     69 	fsp->fsid = mt.mnt_stat.f_fsidx.__fsid_val[0];
     70 	fsp->fileid = inode.z_id;
     71 	fsp->mode = inode.z_mode;
     72 	fsp->size = inode.z_size;
     73 	fsp->rdev = 0;
     74 	return 1;
     75 }
     76