8a719b0cee
First of all, znode_phys_t hasn't been used for storing file attributes for a long time now. Modern ZFS versions use a System Attribute table with a flexible layout. But more importantly all the required information is available in znode_t itself. It's not easy to include zfs_znode.h in userland without breaking code because the most interesting parts of the header are kernel-only. And hardcoding field offsets is too fragile. So, I created a new compilation unit that includes zfs_znode.h using some mild kludges to get it and its dependencies to compile in userland. The compilation unit exports interesting field offsets and does not have any other code. PR: 194117 Reviewed by: markj MFC after: 2 weeks Sponsored by: Panzura Differential Revision: https://reviews.freebsd.org/D24941
113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2007 Ulf Lilleengen
|
|
* 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 AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#define _KERNEL
|
|
#include <sys/mount.h>
|
|
#undef _KERNEL
|
|
#include <sys/queue.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/time.h>
|
|
#include <sys/vnode.h>
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <err.h>
|
|
#include <kvm.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#define ZFS
|
|
#include "libprocstat.h"
|
|
#include "common_kvm.h"
|
|
#include "zfs_defs.h"
|
|
|
|
int
|
|
zfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
|
|
{
|
|
|
|
struct mount mount, *mountptr;
|
|
void *znodeptr;
|
|
char *dataptr;
|
|
size_t len;
|
|
int size;
|
|
|
|
len = sizeof(size);
|
|
if (sysctlbyname("debug.sizeof.znode", &size, &len, NULL, 0) == -1) {
|
|
warnx("error getting sysctl");
|
|
return (1);
|
|
}
|
|
dataptr = malloc(size);
|
|
if (dataptr == NULL) {
|
|
warnx("error allocating memory for znode storage");
|
|
return (1);
|
|
}
|
|
|
|
if ((size_t)size < offsetof_z_id + sizeof(uint64_t) ||
|
|
(size_t)size < offsetof_z_mode + sizeof(mode_t) ||
|
|
(size_t)size < offsetof_z_size + sizeof(uint64_t)) {
|
|
warnx("znode_t size is too small");
|
|
goto bad;
|
|
}
|
|
|
|
if ((size_t)size != sizeof_znode_t)
|
|
warnx("znode_t size mismatch, data could be wrong");
|
|
|
|
/* Since we have problems including vnode.h, we'll use the wrappers. */
|
|
znodeptr = getvnodedata(vp);
|
|
if (!kvm_read_all(kd, (unsigned long)znodeptr, dataptr,
|
|
(size_t)size)) {
|
|
warnx("can't read znode at %p", (void *)znodeptr);
|
|
goto bad;
|
|
}
|
|
|
|
/* Get the mount pointer, and read from the address. */
|
|
mountptr = getvnodemount(vp);
|
|
if (!kvm_read_all(kd, (unsigned long)mountptr, &mount, sizeof(mount))) {
|
|
warnx("can't read mount at %p", (void *)mountptr);
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* XXX Assume that this is a znode, but it can be a special node
|
|
* under .zfs/.
|
|
*/
|
|
vn->vn_fsid = mount.mnt_stat.f_fsid.val[0];
|
|
vn->vn_fileid = *(uint64_t *)(void *)(dataptr + offsetof_z_id);
|
|
vn->vn_mode = *(mode_t *)(void *)(dataptr + offsetof_z_mode);
|
|
vn->vn_size = *(uint64_t *)(void *)(dataptr + offsetof_z_size);
|
|
free(dataptr);
|
|
return (0);
|
|
bad:
|
|
free(dataptr);
|
|
return (1);
|
|
}
|