apfs.c revision 1.1.4.2
1 1.1.4.2 martin /* $NetBSD: apfs.c,v 1.1.4.2 2020/04/08 14:09:20 martin Exp $ */ 2 1.1.4.2 martin /* 3 1.1.4.2 martin * Copyright (c) 2019 Conrad Meyer <cem (at) FreeBSD.org>. All rights reserved. 4 1.1.4.2 martin * 5 1.1.4.2 martin * Redistribution and use in source and binary forms, with or without 6 1.1.4.2 martin * modification, are permitted provided that the following conditions 7 1.1.4.2 martin * are met: 8 1.1.4.2 martin * 1. Redistributions of source code must retain the above copyright 9 1.1.4.2 martin * notice, this list of conditions and the following disclaimer. 10 1.1.4.2 martin * 2. Redistributions in binary form must reproduce the above copyright 11 1.1.4.2 martin * notice, this list of conditions and the following disclaimer in the 12 1.1.4.2 martin * documentation and/or other materials provided with the distribution. 13 1.1.4.2 martin * 14 1.1.4.2 martin * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 1.1.4.2 martin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 1.1.4.2 martin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 1.1.4.2 martin * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 1.1.4.2 martin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 1.1.4.2 martin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 1.1.4.2 martin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 1.1.4.2 martin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 1.1.4.2 martin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 1.1.4.2 martin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 1.1.4.2 martin * SUCH DAMAGE. 25 1.1.4.2 martin */ 26 1.1.4.2 martin #include <sys/cdefs.h> 27 1.1.4.2 martin __RCSID("$NetBSD: apfs.c,v 1.1.4.2 2020/04/08 14:09:20 martin Exp $"); 28 1.1.4.2 martin 29 1.1.4.2 martin #include <assert.h> 30 1.1.4.2 martin #include <err.h> 31 1.1.4.2 martin #include <errno.h> 32 1.1.4.2 martin #include <stdbool.h> 33 1.1.4.2 martin #include <stdint.h> 34 1.1.4.2 martin #include <stdio.h> 35 1.1.4.2 martin #include <stdlib.h> 36 1.1.4.2 martin #include <string.h> 37 1.1.4.2 martin 38 1.1.4.2 martin #include "fstyp.h" 39 1.1.4.2 martin 40 1.1.4.2 martin /* 41 1.1.4.2 martin * This really detects the container format, which might be best supported by 42 1.1.4.2 martin * geom_part or a special GEOM class. 43 1.1.4.2 martin * 44 1.1.4.2 martin * https://developer.apple.com/support/downloads/Apple-File-System-Reference.pdf 45 1.1.4.2 martin */ 46 1.1.4.2 martin 47 1.1.4.2 martin #define NX_CKSUM_SZ 8 48 1.1.4.2 martin 49 1.1.4.2 martin typedef uint64_t nx_oid_t; 50 1.1.4.2 martin 51 1.1.4.2 martin typedef uint64_t nx_xid_t; 52 1.1.4.2 martin 53 1.1.4.2 martin struct nx_obj { 54 1.1.4.2 martin uint8_t o_cksum[NX_CKSUM_SZ]; /* Fletcher 64 */ 55 1.1.4.2 martin nx_oid_t o_oid; 56 1.1.4.2 martin nx_xid_t o_xid; 57 1.1.4.2 martin uint32_t o_type; 58 1.1.4.2 martin uint32_t o_subtype; 59 1.1.4.2 martin }; 60 1.1.4.2 martin 61 1.1.4.2 martin /* nx_obj::o_oid */ 62 1.1.4.2 martin #define OID_NX_SUPERBLOCK 1 63 1.1.4.2 martin 64 1.1.4.2 martin /* nx_obj::o_type: */ 65 1.1.4.2 martin #define OBJECT_TYPE_MASK 0x0000ffff 66 1.1.4.2 martin #define OBJECT_TYPE_NX_SUPERBLOCK 0x00000001 67 1.1.4.2 martin #define OBJECT_TYPE_FLAGS_MASK 0xffff0000 68 1.1.4.2 martin #define OBJ_STORAGETYPE_MASK 0xc0000000 69 1.1.4.2 martin #define OBJECT_TYPE_FLAGS_DEFINED_MASK 0xf8000000 70 1.1.4.2 martin #define OBJ_STORAGE_VIRTUAL 0x00000000 71 1.1.4.2 martin #define OBJ_STORAGE_EPHEMERAL 0x80000000 72 1.1.4.2 martin #define OBJ_STORAGE_PHYSICAL 0x40000000 73 1.1.4.2 martin #define OBJ_NOHEADER 0x20000000 74 1.1.4.2 martin #define OBJ_ENCRYPTED 0x10000000 75 1.1.4.2 martin #define OBJ_NONPERSISTENT 0x08000000 76 1.1.4.2 martin 77 1.1.4.2 martin struct nx_superblock { 78 1.1.4.2 martin struct nx_obj nx_o; 79 1.1.4.2 martin char nx_magic[4]; 80 1.1.4.2 martin /* ... other stuff that doesn't matter */ 81 1.1.4.2 martin }; 82 1.1.4.2 martin 83 1.1.4.2 martin int 84 1.1.4.2 martin fstyp_apfs(FILE *fp, char *label, size_t size) 85 1.1.4.2 martin { 86 1.1.4.2 martin struct nx_superblock *csb; 87 1.1.4.2 martin int retval; 88 1.1.4.2 martin 89 1.1.4.2 martin retval = 1; 90 1.1.4.2 martin csb = read_buf(fp, 0, sizeof(*csb)); 91 1.1.4.2 martin if (csb == NULL) 92 1.1.4.2 martin goto fail; 93 1.1.4.2 martin 94 1.1.4.2 martin /* Ideally, checksum the SB here. */ 95 1.1.4.2 martin if (strncmp(csb->nx_magic, "NXSB", 4) != 0 || 96 1.1.4.2 martin csb->nx_o.o_oid != OID_NX_SUPERBLOCK || 97 1.1.4.2 martin (csb->nx_o.o_type & OBJECT_TYPE_MASK) != OBJECT_TYPE_NX_SUPERBLOCK) 98 1.1.4.2 martin goto fail; 99 1.1.4.2 martin 100 1.1.4.2 martin retval = 0; 101 1.1.4.2 martin 102 1.1.4.2 martin /* No label support yet. */ 103 1.1.4.2 martin 104 1.1.4.2 martin fail: 105 1.1.4.2 martin free(csb); 106 1.1.4.2 martin return (retval); 107 1.1.4.2 martin } 108
Indexes created Sat Oct 18 08:10:09 GMT 2025