| 1 | /* $NetBSD: dkwedge_apple.c,v 1.2 2015/01/24 02:58:56 christos Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2012 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Christos Zoulas. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | /* |
| 33 | * Apple support for disk wedges |
| 34 | */ |
| 35 | |
| 36 | #include <sys/cdefs.h> |
| 37 | __KERNEL_RCSID(0, "$NetBSD: dkwedge_apple.c,v 1.2 2015/01/24 02:58:56 christos Exp $" ); |
| 38 | |
| 39 | #include <sys/param.h> |
| 40 | #ifdef _KERNEL |
| 41 | #include <sys/systm.h> |
| 42 | #endif |
| 43 | #include <sys/proc.h> |
| 44 | #include <sys/errno.h> |
| 45 | #include <sys/disk.h> |
| 46 | #include <sys/vnode.h> |
| 47 | #include <sys/malloc.h> |
| 48 | #include <sys/bitops.h> |
| 49 | |
| 50 | #include <sys/bootblock.h> |
| 51 | |
| 52 | #define SWAP16(x) ap->x = be16toh(ap->x) |
| 53 | #define SWAP32(x) ap->x = be32toh(ap->x) |
| 54 | |
| 55 | #ifdef DKWEDGE_DEBUG |
| 56 | #define DPRINTF(fmt, ...) printf(fmt, __VA_ARGS__) |
| 57 | #else |
| 58 | #define DPRINTF(fmt, ...) |
| 59 | #endif |
| 60 | |
| 61 | static void |
| 62 | swap_apple_drvr_descriptor(struct apple_drvr_descriptor *ap) |
| 63 | { |
| 64 | SWAP32(descBlock); |
| 65 | SWAP16(descSize); |
| 66 | SWAP16(descType); |
| 67 | } |
| 68 | |
| 69 | static void |
| 70 | swap_apple_drvr_map(struct apple_drvr_map *ap) |
| 71 | { |
| 72 | uint16_t i; |
| 73 | |
| 74 | SWAP16(sbSig); |
| 75 | SWAP16(sbBlockSize); |
| 76 | SWAP32(sbBlkCount); |
| 77 | SWAP16(sbDevType); |
| 78 | SWAP16(sbDevID); |
| 79 | SWAP32(sbData); |
| 80 | SWAP16(sbDrvrCount); |
| 81 | |
| 82 | if (ap->sbDrvrCount >= APPLE_DRVR_MAP_MAX_DESCRIPTORS) |
| 83 | ap->sbDrvrCount = APPLE_DRVR_MAP_MAX_DESCRIPTORS; |
| 84 | |
| 85 | for (i = 0; i < ap->sbDrvrCount; i++) |
| 86 | swap_apple_drvr_descriptor(&ap->sb_dd[i]); |
| 87 | } |
| 88 | |
| 89 | static void |
| 90 | swap_apple_part_map_entry(struct apple_part_map_entry *ap) |
| 91 | { |
| 92 | SWAP16(pmSig); |
| 93 | SWAP16(pmSigPad); |
| 94 | SWAP32(pmMapBlkCnt); |
| 95 | SWAP32(pmPyPartStart); |
| 96 | SWAP32(pmPartBlkCnt); |
| 97 | SWAP32(pmLgDataStart); |
| 98 | SWAP32(pmDataCnt); |
| 99 | SWAP32(pmPartStatus); |
| 100 | SWAP32(pmLgBootStart); |
| 101 | SWAP32(pmBootSize); |
| 102 | SWAP32(pmBootLoad); |
| 103 | SWAP32(pmBootLoad2); |
| 104 | SWAP32(pmBootEntry); |
| 105 | SWAP32(pmBootEntry2); |
| 106 | SWAP32(pmBootCksum); |
| 107 | } |
| 108 | |
| 109 | static void |
| 110 | swap_apple_blockzeroblock(struct apple_blockzeroblock *ap) |
| 111 | { |
| 112 | SWAP32(bzbMagic); |
| 113 | SWAP16(bzbBadBlockInode); |
| 114 | SWAP16(bzbFlags); |
| 115 | SWAP16(bzbReserved); |
| 116 | SWAP32(bzbCreationTime); |
| 117 | SWAP32(bzbMountTime); |
| 118 | SWAP32(bzbUMountTime); |
| 119 | } |
| 120 | |
| 121 | #undef SWAP16 |
| 122 | #undef SWAP32 |
| 123 | |
| 124 | #define ASIZE 16384 |
| 125 | |
| 126 | #ifdef _KERNEL |
| 127 | #define DKW_MALLOC(SZ) malloc((SZ), M_DEVBUF, M_WAITOK) |
| 128 | #define DKW_FREE(PTR) free((PTR), M_DEVBUF) |
| 129 | #else |
| 130 | #define DKW_MALLOC(SZ) malloc((SZ)) |
| 131 | #define DKW_FREE(PTR) free((PTR)) |
| 132 | #endif |
| 133 | |
| 134 | static struct { |
| 135 | const char *name; |
| 136 | const char *type; |
| 137 | } map[] = { |
| 138 | { APPLE_PART_TYPE_UNIX, DKW_PTYPE_SYSV }, |
| 139 | { APPLE_PART_TYPE_MAC, DKW_PTYPE_APPLEHFS }, |
| 140 | }; |
| 141 | |
| 142 | |
| 143 | static int |
| 144 | dkwedge_discover_apple(struct disk *pdk, struct vnode *vp) |
| 145 | { |
| 146 | size_t i; |
| 147 | int error; |
| 148 | void *buf; |
| 149 | uint32_t blocksize, offset, rsize; |
| 150 | struct apple_drvr_map *am; |
| 151 | struct apple_part_map_entry *ae; |
| 152 | struct apple_blockzeroblock ab; |
| 153 | const char *ptype; |
| 154 | |
| 155 | buf = DKW_MALLOC(ASIZE); |
| 156 | if ((error = dkwedge_read(pdk, vp, 0, buf, ASIZE)) != 0) { |
| 157 | DPRINTF("%s: read @%u %d\n" , __func__, 0, error); |
| 158 | goto out; |
| 159 | } |
| 160 | |
| 161 | am = buf; |
| 162 | swap_apple_drvr_map(am); |
| 163 | |
| 164 | error = ESRCH; |
| 165 | |
| 166 | if (am->sbSig != APPLE_DRVR_MAP_MAGIC) { |
| 167 | DPRINTF("%s: drvr magic %x != %x\n" , __func__, am->sbSig, |
| 168 | APPLE_DRVR_MAP_MAGIC); |
| 169 | goto out; |
| 170 | } |
| 171 | |
| 172 | blocksize = am->sbBlockSize; |
| 173 | |
| 174 | rsize = 1 << (ilog2(MAX(sizeof(*ae), blocksize) - 1) + 1); |
| 175 | if (ASIZE < rsize) { |
| 176 | DPRINTF("%s: buffer too small %u < %u\n" , __func__, ASIZE, |
| 177 | rsize); |
| 178 | goto out; |
| 179 | } |
| 180 | |
| 181 | ae = buf; |
| 182 | for (offset = blocksize;; offset += rsize) { |
| 183 | DPRINTF("%s: offset %x rsize %x\n" , __func__, offset, rsize); |
| 184 | if ((error = dkwedge_read(pdk, vp, offset / DEV_BSIZE, buf, |
| 185 | rsize)) != 0) { |
| 186 | DPRINTF("%s: read @%u %d\n" , __func__, offset, |
| 187 | error); |
| 188 | goto out; |
| 189 | } |
| 190 | |
| 191 | swap_apple_part_map_entry(ae); |
| 192 | if (ae->pmSig != APPLE_PART_MAP_ENTRY_MAGIC) { |
| 193 | DPRINTF("%s: part magic %x != %x\n" , __func__, |
| 194 | ae->pmSig, APPLE_PART_MAP_ENTRY_MAGIC); |
| 195 | break; |
| 196 | } |
| 197 | |
| 198 | for (i = 0; i < __arraycount(map); i++) |
| 199 | if (strcasecmp(map[i].name, ae->pmPartType) == 0) |
| 200 | break; |
| 201 | |
| 202 | DPRINTF("%s: %s/%s PH=%u/%u LG=%u/%u\n" , __func__, |
| 203 | ae->pmPartName, ae->pmPartType, |
| 204 | ae->pmPyPartStart, ae->pmPartBlkCnt, |
| 205 | ae->pmLgDataStart, ae->pmDataCnt); |
| 206 | |
| 207 | if (i == __arraycount(map)) |
| 208 | continue; |
| 209 | |
| 210 | ptype = map[i].type; |
| 211 | memcpy(&ab, ae->pmBootArgs, sizeof(ab)); |
| 212 | swap_apple_blockzeroblock(&ab); |
| 213 | if (ab.bzbMagic == APPLE_BZB_MAGIC) { |
| 214 | if (ab.bzbType == APPLE_BZB_TYPESWAP) |
| 215 | ptype = DKW_PTYPE_SWAP; |
| 216 | } |
| 217 | |
| 218 | struct dkwedge_info dkw; |
| 219 | |
| 220 | strcpy(dkw.dkw_ptype, ptype); |
| 221 | strcpy(dkw.dkw_parent, pdk->dk_name); |
| 222 | dkw.dkw_offset = ae->pmPyPartStart; |
| 223 | dkw.dkw_size = ae->pmPartBlkCnt; |
| 224 | strlcpy(dkw.dkw_wname, ae->pmPartName, sizeof(dkw.dkw_wname)); |
| 225 | error = dkwedge_add(&dkw); |
| 226 | if (error == EEXIST) |
| 227 | aprint_error("%s: wedge named '%s' already " |
| 228 | "exists, manual intervention required\n" , |
| 229 | pdk->dk_name, dkw.dkw_wname); |
| 230 | else if (error) |
| 231 | aprint_error("%s: error %d adding partition " |
| 232 | "%s type %s\n" , pdk->dk_name, error, |
| 233 | ae->pmPartType, dkw.dkw_ptype); |
| 234 | } |
| 235 | |
| 236 | out: |
| 237 | DKW_FREE(buf); |
| 238 | DPRINTF("%s: return %d\n" , __func__, error); |
| 239 | return error; |
| 240 | } |
| 241 | |
| 242 | #ifdef _KERNEL |
| 243 | DKWEDGE_DISCOVERY_METHOD_DECL(APPLE, -5, dkwedge_discover_apple); |
| 244 | #endif |
| 245 | |