135 lines
3.9 KiB
C
135 lines
3.9 KiB
C
/*-
|
|
* 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/sysctl.h>
|
|
|
|
#undef lbolt
|
|
#undef lbolt64
|
|
#undef gethrestime_sec
|
|
#include <sys/zfs_context.h>
|
|
#include <sys/spa.h>
|
|
#include <sys/spa_impl.h>
|
|
#include <sys/dmu.h>
|
|
#include <sys/zap.h>
|
|
#include <sys/fs/zfs.h>
|
|
#include <sys/zfs_znode.h>
|
|
|
|
#include <err.h>
|
|
#include <kvm.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#define ZFS
|
|
#undef dprintf
|
|
#include <fstat.h>
|
|
|
|
/*
|
|
* Offset calculations that are used to get data from znode without having the
|
|
* definition.
|
|
*/
|
|
#define LOCATION_ZID (2 * sizeof(void *))
|
|
#define LOCATION_ZPHYS(zsize) ((zsize) - (2 * sizeof(void *)))
|
|
|
|
int
|
|
zfs_filestat(struct vnode *vp, struct filestat *fsp)
|
|
{
|
|
|
|
znode_phys_t zphys;
|
|
struct mount mount, *mountptr;
|
|
uint64_t *zid;
|
|
void *znodeptr, *vnodeptr;
|
|
char *dataptr;
|
|
void *zphys_addr;
|
|
size_t len;
|
|
int size;
|
|
|
|
len = sizeof(size);
|
|
if (sysctlbyname("debug.sizeof.znode", &size, &len, NULL, 0) == -1) {
|
|
dprintf(stderr, "error getting sysctl\n");
|
|
return (0);
|
|
}
|
|
znodeptr = malloc(size);
|
|
if (znodeptr == NULL) {
|
|
dprintf(stderr, "error allocating memory for znode storage\n");
|
|
return (0);
|
|
}
|
|
|
|
/* Since we have problems including vnode.h, we'll use the wrappers. */
|
|
vnodeptr = getvnodedata(vp);
|
|
if (!KVM_READ(vnodeptr, znodeptr, (size_t)size)) {
|
|
dprintf(stderr, "can't read znode at %p for pid %d\n",
|
|
(void *)vnodeptr, Pid);
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* z_id field is stored in the third pointer. We therefore skip the two
|
|
* first bytes.
|
|
*
|
|
* Pointer to the z_phys structure is the next last pointer. Therefore
|
|
* go back two bytes from the end.
|
|
*/
|
|
dataptr = znodeptr;
|
|
zid = (uint64_t *)(dataptr + LOCATION_ZID);
|
|
zphys_addr = *(void **)(dataptr + LOCATION_ZPHYS(size));
|
|
|
|
if (!KVM_READ(zphys_addr, &zphys, sizeof(zphys))) {
|
|
dprintf(stderr, "can't read znode_phys at %p for pid %d\n",
|
|
zphys_addr, Pid);
|
|
goto bad;
|
|
}
|
|
|
|
/* Get the mount pointer, and read from the address. */
|
|
mountptr = getvnodemount(vp);
|
|
if (!KVM_READ(mountptr, &mount, sizeof(mount))) {
|
|
dprintf(stderr, "can't read mount at %p for pid %d\n",
|
|
(void *)mountptr, Pid);
|
|
goto bad;
|
|
}
|
|
|
|
fsp->fsid = (long)mount.mnt_stat.f_fsid.val[0];
|
|
fsp->fileid = *zid;
|
|
/*
|
|
* XXX: Shows up wrong in output, but UFS has this error too. Could
|
|
* be that we're casting mode-variables from 64-bit to 8-bit or simply
|
|
* error in the mode-to-string function.
|
|
*/
|
|
fsp->mode = (mode_t)zphys.zp_mode;
|
|
fsp->size = (u_long)zphys.zp_size;
|
|
fsp->rdev = (dev_t)zphys.zp_rdev;
|
|
free(znodeptr);
|
|
return (1);
|
|
bad:
|
|
free(znodeptr);
|
|
return (0);
|
|
}
|