1 /* $OpenBSD: kvm_udf.c,v 1.11 2021/09/10 00:02:43 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/types.h> 30 #include <sys/time.h> 31 #include <sys/ucred.h> 32 #define _KERNEL 33 #include <sys/mount.h> 34 #undef _KERNEL 35 #include <sys/lock.h> 36 #include <sys/vnode.h> 37 #include <sys/sysctl.h> 38 #include <sys/specdev.h> 39 40 #include <crypto/siphash.h> 41 42 #include <isofs/udf/ecma167-udf.h> 43 #include <isofs/udf/udf.h> 44 45 #include <stdint.h> 46 #include <limits.h> 47 #include <kvm.h> 48 #include <db.h> 49 50 #include "kvm_private.h" 51 #include "kvm_file.h" 52 53 /* Convert file entry permission (5 bits per owner/group/user) to a mode_t */ 54 static mode_t 55 udf_permtomode(struct unode *up) 56 { 57 uint32_t perm; 58 uint16_t flags; 59 mode_t mode; 60 61 perm = letoh32(up->u_fentry->perm); 62 flags = letoh16(up->u_fentry->icbtag.flags); 63 64 mode = perm & UDF_FENTRY_PERM_USER_MASK; 65 mode |= ((perm & UDF_FENTRY_PERM_GRP_MASK) >> 2); 66 mode |= ((perm & UDF_FENTRY_PERM_OWNER_MASK) >> 4); 67 mode |= ((flags & UDF_ICB_TAG_FLAGS_STICKY) << 4); 68 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETGID) << 6); 69 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETUID) << 8); 70 71 return (mode); 72 } 73 74 int 75 _kvm_stat_udf(kvm_t *kd, struct kinfo_file *kf, struct vnode *vp) 76 { 77 struct unode up; 78 struct file_entry fentry; 79 struct umount um; 80 81 if (KREAD(kd, (u_long)VTOU(vp), &up)) { 82 _kvm_err(kd, kd->program, "can't read unode at %p", VTOU(vp)); 83 return (-1); 84 } 85 if (KREAD(kd, (u_long)up.u_fentry, &fentry)) { 86 _kvm_err(kd, kd->program, "can't read file_entry at %p", 87 up.u_fentry); 88 return (-1); 89 } 90 if (KREAD(kd, (u_long)up.u_ump, &um)) { 91 _kvm_err(kd, kd->program, "can't read umount at %p", 92 up.u_ump); 93 return (-1); 94 } 95 kf->va_fsid = up.u_dev; 96 kf->va_fileid = (long)up.u_ino; 97 kf->va_mode = udf_permtomode(&up); /* XXX */ 98 kf->va_rdev = 0; 99 kf->va_nlink = letoh16(fentry.link_cnt); 100 if (vp->v_type & VDIR) { 101 /* 102 * Directories that are recorded within their ICB will show 103 * as having 0 blocks recorded. Since tradition dictates 104 * that directories consume at least one logical block, 105 * make it appear so. 106 */ 107 if (fentry.logblks_rec != 0) { 108 kf->va_size = 109 letoh64(fentry.logblks_rec) * um.um_bsize; 110 } else { 111 kf->va_size = um.um_bsize; 112 } 113 } else { 114 kf->va_size = letoh64(fentry.inf_len); 115 } 116 117 return (0); 118 } 119