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https://github.com/freebsd/freebsd-src
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113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2007 Ulf Lilleengen
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <stdbool.h>
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#include <sys/param.h>
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#define _KERNEL
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#include <sys/mount.h>
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#undef _KERNEL
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <sys/time.h>
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#include <sys/vnode.h>
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#include <netinet/in.h>
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#include <err.h>
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#include <kvm.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define ZFS
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#include "libprocstat.h"
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#include "common_kvm.h"
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#include "zfs_defs.h"
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int
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zfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
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{
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struct mount mount, *mountptr;
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void *znodeptr;
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char *dataptr;
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size_t len;
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int size;
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len = sizeof(size);
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if (sysctlbyname("debug.sizeof.znode", &size, &len, NULL, 0) == -1) {
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warnx("error getting sysctl");
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return (1);
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}
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dataptr = malloc(size);
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if (dataptr == NULL) {
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warnx("error allocating memory for znode storage");
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return (1);
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}
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if ((size_t)size < offsetof_z_id + sizeof(uint64_t) ||
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(size_t)size < offsetof_z_mode + sizeof(mode_t) ||
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(size_t)size < offsetof_z_size + sizeof(uint64_t)) {
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warnx("znode_t size is too small");
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goto bad;
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}
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if ((size_t)size != sizeof_znode_t)
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warnx("znode_t size mismatch, data could be wrong");
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/* Since we have problems including vnode.h, we'll use the wrappers. */
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znodeptr = getvnodedata(vp);
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if (!kvm_read_all(kd, (unsigned long)znodeptr, dataptr,
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(size_t)size)) {
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warnx("can't read znode at %p", (void *)znodeptr);
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goto bad;
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}
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/* Get the mount pointer, and read from the address. */
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mountptr = getvnodemount(vp);
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if (!kvm_read_all(kd, (unsigned long)mountptr, &mount, sizeof(mount))) {
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warnx("can't read mount at %p", (void *)mountptr);
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goto bad;
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}
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/*
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* XXX Assume that this is a znode, but it can be a special node
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* under .zfs/.
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*/
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vn->vn_fsid = mount.mnt_stat.f_fsid.val[0];
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vn->vn_fileid = *(uint64_t *)(void *)(dataptr + offsetof_z_id);
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vn->vn_mode = *(mode_t *)(void *)(dataptr + offsetof_z_mode);
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vn->vn_size = *(uint64_t *)(void *)(dataptr + offsetof_z_size);
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free(dataptr);
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return (0);
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bad:
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free(dataptr);
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return (1);
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}
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