1 /* $OpenBSD: kvm_udf.c,v 1.8 2014/11/18 12:41:16 dlg 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/param.h> 30 #include <sys/ucred.h> 31 #define _KERNEL 32 #include <sys/mount.h> 33 #undef _KERNEL 34 #include <sys/vnode.h> 35 #include <sys/sysctl.h> 36 #include <sys/specdev.h> 37 38 #include <crypto/siphash.h> 39 40 #include <isofs/udf/ecma167-udf.h> 41 #include <isofs/udf/udf.h> 42 43 #include <stdint.h> 44 #include <limits.h> 45 #include <kvm.h> 46 #include <db.h> 47 48 #include "kvm_private.h" 49 #include "kvm_file.h" 50 51 /* Convert file entry permission (5 bits per owner/group/user) to a mode_t */ 52 static mode_t 53 udf_permtomode(struct unode *up) 54 { 55 uint32_t perm; 56 uint16_t flags; 57 mode_t mode; 58 59 perm = letoh32(up->u_fentry->perm); 60 flags = letoh16(up->u_fentry->icbtag.flags); 61 62 mode = perm & UDF_FENTRY_PERM_USER_MASK; 63 mode |= ((perm & UDF_FENTRY_PERM_GRP_MASK) >> 2); 64 mode |= ((perm & UDF_FENTRY_PERM_OWNER_MASK) >> 4); 65 mode |= ((flags & UDF_ICB_TAG_FLAGS_STICKY) << 4); 66 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETGID) << 6); 67 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETUID) << 8); 68 69 return (mode); 70 } 71 72 int 73 _kvm_stat_udf(kvm_t *kd, struct kinfo_file *kf, struct vnode *vp) 74 { 75 struct unode up; 76 struct file_entry fentry; 77 struct umount um; 78 79 if (KREAD(kd, (u_long)VTOU(vp), &up)) { 80 _kvm_err(kd, kd->program, "can't read unode at %p", VTOU(vp)); 81 return (-1); 82 } 83 if (KREAD(kd, (u_long)up.u_fentry, &fentry)) { 84 _kvm_err(kd, kd->program, "can't read file_entry at %p", 85 up.u_fentry); 86 return (-1); 87 } 88 if (KREAD(kd, (u_long)up.u_ump, &um)) { 89 _kvm_err(kd, kd->program, "can't read umount at %p", 90 up.u_ump); 91 return (-1); 92 } 93 kf->va_fsid = up.u_dev; 94 kf->va_fileid = (long)up.u_ino; 95 kf->va_mode = udf_permtomode(&up); /* XXX */ 96 kf->va_rdev = 0; 97 if (vp->v_type & VDIR) { 98 /* 99 * Directories that are recorded within their ICB will show 100 * as having 0 blocks recorded. Since tradition dictates 101 * that directories consume at least one logical block, 102 * make it appear so. 103 */ 104 if (fentry.logblks_rec != 0) { 105 kf->va_size = 106 letoh64(fentry.logblks_rec) * um.um_bsize; 107 } else { 108 kf->va_size = um.um_bsize; 109 } 110 } else { 111 kf->va_size = letoh64(fentry.inf_len); 112 } 113 114 return (0); 115 } 116