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