1*a4a6d532Stkusumi /* $NetBSD: apfs.c,v 1.1 2019/12/27 11:15:06 tkusumi Exp $ */
2*a4a6d532Stkusumi /*
3*a4a6d532Stkusumi * Copyright (c) 2019 Conrad Meyer <cem@FreeBSD.org>. All rights reserved.
4*a4a6d532Stkusumi *
5*a4a6d532Stkusumi * Redistribution and use in source and binary forms, with or without
6*a4a6d532Stkusumi * modification, are permitted provided that the following conditions
7*a4a6d532Stkusumi * are met:
8*a4a6d532Stkusumi * 1. Redistributions of source code must retain the above copyright
9*a4a6d532Stkusumi * notice, this list of conditions and the following disclaimer.
10*a4a6d532Stkusumi * 2. Redistributions in binary form must reproduce the above copyright
11*a4a6d532Stkusumi * notice, this list of conditions and the following disclaimer in the
12*a4a6d532Stkusumi * documentation and/or other materials provided with the distribution.
13*a4a6d532Stkusumi *
14*a4a6d532Stkusumi * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15*a4a6d532Stkusumi * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16*a4a6d532Stkusumi * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17*a4a6d532Stkusumi * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18*a4a6d532Stkusumi * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19*a4a6d532Stkusumi * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20*a4a6d532Stkusumi * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21*a4a6d532Stkusumi * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22*a4a6d532Stkusumi * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23*a4a6d532Stkusumi * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24*a4a6d532Stkusumi * SUCH DAMAGE.
25*a4a6d532Stkusumi */
26*a4a6d532Stkusumi #include <sys/cdefs.h>
27*a4a6d532Stkusumi __RCSID("$NetBSD: apfs.c,v 1.1 2019/12/27 11:15:06 tkusumi Exp $");
28*a4a6d532Stkusumi
29*a4a6d532Stkusumi #include <assert.h>
30*a4a6d532Stkusumi #include <err.h>
31*a4a6d532Stkusumi #include <errno.h>
32*a4a6d532Stkusumi #include <stdbool.h>
33*a4a6d532Stkusumi #include <stdint.h>
34*a4a6d532Stkusumi #include <stdio.h>
35*a4a6d532Stkusumi #include <stdlib.h>
36*a4a6d532Stkusumi #include <string.h>
37*a4a6d532Stkusumi
38*a4a6d532Stkusumi #include "fstyp.h"
39*a4a6d532Stkusumi
40*a4a6d532Stkusumi /*
41*a4a6d532Stkusumi * This really detects the container format, which might be best supported by
42*a4a6d532Stkusumi * geom_part or a special GEOM class.
43*a4a6d532Stkusumi *
44*a4a6d532Stkusumi * https://developer.apple.com/support/downloads/Apple-File-System-Reference.pdf
45*a4a6d532Stkusumi */
46*a4a6d532Stkusumi
47*a4a6d532Stkusumi #define NX_CKSUM_SZ 8
48*a4a6d532Stkusumi
49*a4a6d532Stkusumi typedef uint64_t nx_oid_t;
50*a4a6d532Stkusumi
51*a4a6d532Stkusumi typedef uint64_t nx_xid_t;
52*a4a6d532Stkusumi
53*a4a6d532Stkusumi struct nx_obj {
54*a4a6d532Stkusumi uint8_t o_cksum[NX_CKSUM_SZ]; /* Fletcher 64 */
55*a4a6d532Stkusumi nx_oid_t o_oid;
56*a4a6d532Stkusumi nx_xid_t o_xid;
57*a4a6d532Stkusumi uint32_t o_type;
58*a4a6d532Stkusumi uint32_t o_subtype;
59*a4a6d532Stkusumi };
60*a4a6d532Stkusumi
61*a4a6d532Stkusumi /* nx_obj::o_oid */
62*a4a6d532Stkusumi #define OID_NX_SUPERBLOCK 1
63*a4a6d532Stkusumi
64*a4a6d532Stkusumi /* nx_obj::o_type: */
65*a4a6d532Stkusumi #define OBJECT_TYPE_MASK 0x0000ffff
66*a4a6d532Stkusumi #define OBJECT_TYPE_NX_SUPERBLOCK 0x00000001
67*a4a6d532Stkusumi #define OBJECT_TYPE_FLAGS_MASK 0xffff0000
68*a4a6d532Stkusumi #define OBJ_STORAGETYPE_MASK 0xc0000000
69*a4a6d532Stkusumi #define OBJECT_TYPE_FLAGS_DEFINED_MASK 0xf8000000
70*a4a6d532Stkusumi #define OBJ_STORAGE_VIRTUAL 0x00000000
71*a4a6d532Stkusumi #define OBJ_STORAGE_EPHEMERAL 0x80000000
72*a4a6d532Stkusumi #define OBJ_STORAGE_PHYSICAL 0x40000000
73*a4a6d532Stkusumi #define OBJ_NOHEADER 0x20000000
74*a4a6d532Stkusumi #define OBJ_ENCRYPTED 0x10000000
75*a4a6d532Stkusumi #define OBJ_NONPERSISTENT 0x08000000
76*a4a6d532Stkusumi
77*a4a6d532Stkusumi struct nx_superblock {
78*a4a6d532Stkusumi struct nx_obj nx_o;
79*a4a6d532Stkusumi char nx_magic[4];
80*a4a6d532Stkusumi /* ... other stuff that doesn't matter */
81*a4a6d532Stkusumi };
82*a4a6d532Stkusumi
83*a4a6d532Stkusumi int
fstyp_apfs(FILE * fp,char * label,size_t size)84*a4a6d532Stkusumi fstyp_apfs(FILE *fp, char *label, size_t size)
85*a4a6d532Stkusumi {
86*a4a6d532Stkusumi struct nx_superblock *csb;
87*a4a6d532Stkusumi int retval;
88*a4a6d532Stkusumi
89*a4a6d532Stkusumi retval = 1;
90*a4a6d532Stkusumi csb = read_buf(fp, 0, sizeof(*csb));
91*a4a6d532Stkusumi if (csb == NULL)
92*a4a6d532Stkusumi goto fail;
93*a4a6d532Stkusumi
94*a4a6d532Stkusumi /* Ideally, checksum the SB here. */
95*a4a6d532Stkusumi if (strncmp(csb->nx_magic, "NXSB", 4) != 0 ||
96*a4a6d532Stkusumi csb->nx_o.o_oid != OID_NX_SUPERBLOCK ||
97*a4a6d532Stkusumi (csb->nx_o.o_type & OBJECT_TYPE_MASK) != OBJECT_TYPE_NX_SUPERBLOCK)
98*a4a6d532Stkusumi goto fail;
99*a4a6d532Stkusumi
100*a4a6d532Stkusumi retval = 0;
101*a4a6d532Stkusumi
102*a4a6d532Stkusumi /* No label support yet. */
103*a4a6d532Stkusumi
104*a4a6d532Stkusumi fail:
105*a4a6d532Stkusumi free(csb);
106*a4a6d532Stkusumi return (retval);
107*a4a6d532Stkusumi }
108