1 /* $OpenBSD: kvm_udf.c,v 1.10 2016/10/02 23:11:55 guenther 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/lock.h> 35 #include <sys/vnode.h> 36 #include <sys/sysctl.h> 37 #include <sys/specdev.h> 38 39 #include <crypto/siphash.h> 40 41 #include <isofs/udf/ecma167-udf.h> 42 #include <isofs/udf/udf.h> 43 44 #include <stdint.h> 45 #include <limits.h> 46 #include <kvm.h> 47 #include <db.h> 48 49 #include "kvm_private.h" 50 #include "kvm_file.h" 51 52 /* Convert file entry permission (5 bits per owner/group/user) to a mode_t */ 53 static mode_t 54 udf_permtomode(struct unode *up) 55 { 56 uint32_t perm; 57 uint16_t flags; 58 mode_t mode; 59 60 perm = letoh32(up->u_fentry->perm); 61 flags = letoh16(up->u_fentry->icbtag.flags); 62 63 mode = perm & UDF_FENTRY_PERM_USER_MASK; 64 mode |= ((perm & UDF_FENTRY_PERM_GRP_MASK) >> 2); 65 mode |= ((perm & UDF_FENTRY_PERM_OWNER_MASK) >> 4); 66 mode |= ((flags & UDF_ICB_TAG_FLAGS_STICKY) << 4); 67 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETGID) << 6); 68 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETUID) << 8); 69 70 return (mode); 71 } 72 73 int 74 _kvm_stat_udf(kvm_t *kd, struct kinfo_file *kf, struct vnode *vp) 75 { 76 struct unode up; 77 struct file_entry fentry; 78 struct umount um; 79 80 if (KREAD(kd, (u_long)VTOU(vp), &up)) { 81 _kvm_err(kd, kd->program, "can't read unode at %p", VTOU(vp)); 82 return (-1); 83 } 84 if (KREAD(kd, (u_long)up.u_fentry, &fentry)) { 85 _kvm_err(kd, kd->program, "can't read file_entry at %p", 86 up.u_fentry); 87 return (-1); 88 } 89 if (KREAD(kd, (u_long)up.u_ump, &um)) { 90 _kvm_err(kd, kd->program, "can't read umount at %p", 91 up.u_ump); 92 return (-1); 93 } 94 kf->va_fsid = up.u_dev; 95 kf->va_fileid = (long)up.u_ino; 96 kf->va_mode = udf_permtomode(&up); /* XXX */ 97 kf->va_rdev = 0; 98 kf->va_nlink = letoh16(fentry.link_cnt); 99 if (vp->v_type & VDIR) { 100 /* 101 * Directories that are recorded within their ICB will show 102 * as having 0 blocks recorded. Since tradition dictates 103 * that directories consume at least one logical block, 104 * make it appear so. 105 */ 106 if (fentry.logblks_rec != 0) { 107 kf->va_size = 108 letoh64(fentry.logblks_rec) * um.um_bsize; 109 } else { 110 kf->va_size = um.um_bsize; 111 } 112 } else { 113 kf->va_size = letoh64(fentry.inf_len); 114 } 115 116 return (0); 117 } 118