119 lines
3.5 KiB
C
119 lines
3.5 KiB
C
/* $OpenBSD: kvm_udf.c,v 1.11 2021/09/10 00:02:43 deraadt Exp $ */
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/*
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* Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org>
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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 <sys/types.h>
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#include <sys/time.h>
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#include <sys/ucred.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/lock.h>
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#include <sys/vnode.h>
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#include <sys/sysctl.h>
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#include <sys/specdev.h>
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#include <crypto/siphash.h>
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#include <isofs/udf/ecma167-udf.h>
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#include <isofs/udf/udf.h>
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#include <stdint.h>
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#include <limits.h>
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#include <kvm.h>
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#include <db.h>
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#include "kvm_private.h"
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#include "kvm_file.h"
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/* Convert file entry permission (5 bits per owner/group/user) to a mode_t */
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static mode_t
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udf_permtomode(struct unode *up)
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{
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uint32_t perm;
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uint16_t flags;
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mode_t mode;
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perm = letoh32(up->u_fentry->perm);
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flags = letoh16(up->u_fentry->icbtag.flags);
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mode = perm & UDF_FENTRY_PERM_USER_MASK;
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mode |= ((perm & UDF_FENTRY_PERM_GRP_MASK) >> 2);
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mode |= ((perm & UDF_FENTRY_PERM_OWNER_MASK) >> 4);
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mode |= ((flags & UDF_ICB_TAG_FLAGS_STICKY) << 4);
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mode |= ((flags & UDF_ICB_TAG_FLAGS_SETGID) << 6);
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mode |= ((flags & UDF_ICB_TAG_FLAGS_SETUID) << 8);
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return (mode);
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}
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int
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_kvm_stat_udf(kvm_t *kd, struct kinfo_file *kf, struct vnode *vp)
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{
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struct unode up;
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struct file_entry fentry;
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struct umount um;
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if (KREAD(kd, (u_long)VTOU(vp), &up)) {
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_kvm_err(kd, kd->program, "can't read unode at %p", VTOU(vp));
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return (-1);
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}
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if (KREAD(kd, (u_long)up.u_fentry, &fentry)) {
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_kvm_err(kd, kd->program, "can't read file_entry at %p",
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up.u_fentry);
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return (-1);
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}
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if (KREAD(kd, (u_long)up.u_ump, &um)) {
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_kvm_err(kd, kd->program, "can't read umount at %p",
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up.u_ump);
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return (-1);
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}
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kf->va_fsid = up.u_dev;
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kf->va_fileid = (long)up.u_ino;
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kf->va_mode = udf_permtomode(&up); /* XXX */
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kf->va_rdev = 0;
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kf->va_nlink = letoh16(fentry.link_cnt);
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if (vp->v_type & VDIR) {
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/*
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* Directories that are recorded within their ICB will show
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* as having 0 blocks recorded. Since tradition dictates
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* that directories consume at least one logical block,
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* make it appear so.
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*/
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if (fentry.logblks_rec != 0) {
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kf->va_size =
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letoh64(fentry.logblks_rec) * um.um_bsize;
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} else {
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kf->va_size = um.um_bsize;
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}
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} else {
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kf->va_size = letoh64(fentry.inf_len);
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}
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return (0);
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}
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