dkwedge_bsdlabel.c revision 1.1.2.2
1 1.1.2.2 skrll /* $NetBSD: dkwedge_bsdlabel.c,v 1.1.2.2 2004/10/19 15:56:45 skrll Exp $ */ 2 1.1.2.2 skrll 3 1.1.2.2 skrll /*- 4 1.1.2.2 skrll * Copyright (c) 2004 The NetBSD Foundation, Inc. 5 1.1.2.2 skrll * All rights reserved. 6 1.1.2.2 skrll * 7 1.1.2.2 skrll * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 skrll * by Jason R. Thorpe. 9 1.1.2.2 skrll * 10 1.1.2.2 skrll * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 skrll * modification, are permitted provided that the following conditions 12 1.1.2.2 skrll * are met: 13 1.1.2.2 skrll * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 skrll * documentation and/or other materials provided with the distribution. 18 1.1.2.2 skrll * 3. All advertising materials mentioning features or use of this software 19 1.1.2.2 skrll * must display the following acknowledgement: 20 1.1.2.2 skrll * This product includes software developed by the NetBSD 21 1.1.2.2 skrll * Foundation, Inc. and its contributors. 22 1.1.2.2 skrll * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1.2.2 skrll * contributors may be used to endorse or promote products derived 24 1.1.2.2 skrll * from this software without specific prior written permission. 25 1.1.2.2 skrll * 26 1.1.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1.2.2 skrll * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1.2.2 skrll * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1.2.2 skrll * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1.2.2 skrll * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1.2.2 skrll * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1.2.2 skrll * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1.2.2 skrll * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1.2.2 skrll * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1.2.2 skrll * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1.2.2 skrll * POSSIBILITY OF SUCH DAMAGE. 37 1.1.2.2 skrll */ 38 1.1.2.2 skrll 39 1.1.2.2 skrll /* 40 1.1.2.2 skrll * Adapted from kern/subr_disk_mbr.c: 41 1.1.2.2 skrll * 42 1.1.2.2 skrll * Copyright (c) 1982, 1986, 1988 Regents of the University of California. 43 1.1.2.2 skrll * All rights reserved. 44 1.1.2.2 skrll * 45 1.1.2.2 skrll * Redistribution and use in source and binary forms, with or without 46 1.1.2.2 skrll * modification, are permitted provided that the following conditions 47 1.1.2.2 skrll * are met: 48 1.1.2.2 skrll * 1. Redistributions of source code must retain the above copyright 49 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer. 50 1.1.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 51 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer in the 52 1.1.2.2 skrll * documentation and/or other materials provided with the distribution. 53 1.1.2.2 skrll * 3. Neither the name of the University nor the names of its contributors 54 1.1.2.2 skrll * may be used to endorse or promote products derived from this software 55 1.1.2.2 skrll * without specific prior written permission. 56 1.1.2.2 skrll * 57 1.1.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 58 1.1.2.2 skrll * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 59 1.1.2.2 skrll * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 60 1.1.2.2 skrll * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 61 1.1.2.2 skrll * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 62 1.1.2.2 skrll * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 63 1.1.2.2 skrll * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 1.1.2.2 skrll * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 65 1.1.2.2 skrll * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 66 1.1.2.2 skrll * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 67 1.1.2.2 skrll * SUCH DAMAGE. 68 1.1.2.2 skrll * 69 1.1.2.2 skrll * @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91 70 1.1.2.2 skrll */ 71 1.1.2.2 skrll 72 1.1.2.2 skrll /* 73 1.1.2.2 skrll * 4.4BSD disklabel support for disk wedges 74 1.1.2.2 skrll * 75 1.1.2.2 skrll * Here is the basic search algorithm in use here: 76 1.1.2.2 skrll * 77 1.1.2.2 skrll * For historical reasons, we scan for x86-style MBR partitions looking 78 1.1.2.2 skrll * for a MBR_PTYPE_NETBSD (or MBR_PTYPE_386BSD) partition. The first 79 1.1.2.2 skrll * 4.4BSD disklabel found in the 2nd sector of such a partition is used. 80 1.1.2.2 skrll * We assume that the 4.4BSD disklabel describes all partitions on the 81 1.1.2.2 skrll * disk; we do not use any partition information from the MBR partition 82 1.1.2.2 skrll * table. 83 1.1.2.2 skrll * 84 1.1.2.2 skrll * If that fails, then we fall back on a table of known locations for 85 1.1.2.2 skrll * various platforms. 86 1.1.2.2 skrll */ 87 1.1.2.2 skrll 88 1.1.2.2 skrll #include <sys/cdefs.h> 89 1.1.2.2 skrll __KERNEL_RCSID(0, "$NetBSD: dkwedge_bsdlabel.c,v 1.1.2.2 2004/10/19 15:56:45 skrll Exp $"); 90 1.1.2.2 skrll 91 1.1.2.2 skrll #include <sys/param.h> 92 1.1.2.2 skrll #include <sys/systm.h> 93 1.1.2.2 skrll #include <sys/proc.h> 94 1.1.2.2 skrll #include <sys/errno.h> 95 1.1.2.2 skrll #include <sys/disk.h> 96 1.1.2.2 skrll #include <sys/vnode.h> 97 1.1.2.2 skrll #include <sys/malloc.h> 98 1.1.2.2 skrll 99 1.1.2.2 skrll #include <sys/bootblock.h> 100 1.1.2.2 skrll #include <sys/disklabel.h> 101 1.1.2.2 skrll 102 1.1.2.2 skrll #define BSD44_MBR_LABELSECTOR 1 103 1.1.2.2 skrll 104 1.1.2.2 skrll #define DISKLABEL_SIZE(x) \ 105 1.1.2.2 skrll (offsetof(struct disklabel, d_partitions) + \ 106 1.1.2.2 skrll (sizeof(struct partition) * (x))) 107 1.1.2.2 skrll 108 1.1.2.2 skrll /* 109 1.1.2.2 skrll * Note the smallest MAXPARTITIONS was 8, so we allow a disklabel 110 1.1.2.2 skrll * that size to be locted at the end of the sector. 111 1.1.2.2 skrll */ 112 1.1.2.2 skrll #define DISKLABEL_MINSIZE DISKLABEL_SIZE(8) 113 1.1.2.2 skrll 114 1.1.2.2 skrll /* 115 1.1.2.2 skrll * Table of known platform-specific disklabel locations. 116 1.1.2.2 skrll */ 117 1.1.2.2 skrll static const struct disklabel_location { 118 1.1.2.2 skrll daddr_t label_sector; /* sector containing label */ 119 1.1.2.2 skrll size_t label_offset; /* byte offset of label in sector */ 120 1.1.2.2 skrll } disklabel_locations[] = { 121 1.1.2.2 skrll { 0, 0 }, /* mvme68k, next68k */ 122 1.1.2.2 skrll { 0, 64 }, /* algor, alpha, amiga, amigappc, evbmips, evbppc, 123 1.1.2.2 skrll luna68k, mac68k, macppc, news68k, newsmips, 124 1.1.2.2 skrll pc532, pdp11, pmax, vax, x68k */ 125 1.1.2.2 skrll { 0, 128 }, /* sparc, sun68k */ 126 1.1.2.2 skrll { 1, 0 }, /* amd64, arc, arm, bebox, cobalt, evbppc, hp700, 127 1.1.2.2 skrll hpcarm, hpcmips, i386, ibmnws, mipsco, mvmeppc, 128 1.1.2.2 skrll ofppc, playstation2, pmppc, prep, sandpoint, 129 1.1.2.2 skrll sbmips, sgimips, sh3, sh5 */ 130 1.1.2.2 skrll /* XXX atari is weird */ 131 1.1.2.2 skrll { 2, 0 }, /* cesfic, hp300 */ 132 1.1.2.2 skrll 133 1.1.2.2 skrll { -1, 0 }, 134 1.1.2.2 skrll }; 135 1.1.2.2 skrll 136 1.1.2.2 skrll #define SCAN_CONTINUE 0 137 1.1.2.2 skrll #define SCAN_FOUND 1 138 1.1.2.2 skrll #define SCAN_ERROR 2 139 1.1.2.2 skrll 140 1.1.2.2 skrll typedef struct mbr_args { 141 1.1.2.2 skrll struct disk *pdk; 142 1.1.2.2 skrll struct vnode *vp; 143 1.1.2.2 skrll void *buf; 144 1.1.2.2 skrll int error; 145 1.1.2.2 skrll } mbr_args_t; 146 1.1.2.2 skrll 147 1.1.2.2 skrll static const char * 148 1.1.2.2 skrll bsdlabel_fstype_to_str(uint8_t fstype) 149 1.1.2.2 skrll { 150 1.1.2.2 skrll const char *str; 151 1.1.2.2 skrll 152 1.1.2.2 skrll switch (fstype) { 153 1.1.2.2 skrll case FS_UNUSED: str = DKW_PTYPE_UNUSED; break; 154 1.1.2.2 skrll case FS_SWAP: str = DKW_PTYPE_SWAP; break; 155 1.1.2.2 skrll case FS_BSDFFS: str = DKW_PTYPE_FFS; break; 156 1.1.2.2 skrll case FS_MSDOS: str = DKW_PTYPE_FAT; break; 157 1.1.2.2 skrll case FS_BSDLFS: str = DKW_PTYPE_LFS; break; 158 1.1.2.2 skrll case FS_ISO9660: str = DKW_PTYPE_ISO9660; break; 159 1.1.2.2 skrll case FS_ADOS: str = DKW_PTYPE_AMIGADOS; break; 160 1.1.2.2 skrll case FS_HFS: str = DKW_PTYPE_APPLEHFS; break; 161 1.1.2.2 skrll case FS_FILECORE: str = DKW_PTYPE_FILECORE; break; 162 1.1.2.2 skrll case FS_EX2FS: str = DKW_PTYPE_EXT2FS; break; 163 1.1.2.2 skrll case FS_NTFS: str = DKW_PTYPE_NTFS; break; 164 1.1.2.2 skrll case FS_RAID: str = DKW_PTYPE_RAIDFRAME; break; 165 1.1.2.2 skrll case FS_CCD: str = DKW_PTYPE_CCD; break; 166 1.1.2.2 skrll case FS_APPLEUFS: str = DKW_PTYPE_APPLEUFS; break; 167 1.1.2.2 skrll case FS_VINUM: str = "vinum"; break; 168 1.1.2.2 skrll default: str = NULL; break; 169 1.1.2.2 skrll } 170 1.1.2.2 skrll 171 1.1.2.2 skrll return (str); 172 1.1.2.2 skrll } 173 1.1.2.2 skrll 174 1.1.2.2 skrll static void 175 1.1.2.2 skrll swap_disklabel(struct disklabel *lp) 176 1.1.2.2 skrll { 177 1.1.2.2 skrll int i; 178 1.1.2.2 skrll 179 1.1.2.2 skrll #define SWAP16(x) lp->x = bswap16(lp->x) 180 1.1.2.2 skrll #define SWAP32(x) lp->x = bswap32(lp->x) 181 1.1.2.2 skrll 182 1.1.2.2 skrll SWAP32(d_magic); 183 1.1.2.2 skrll SWAP16(d_type); 184 1.1.2.2 skrll SWAP16(d_subtype); 185 1.1.2.2 skrll SWAP32(d_secsize); 186 1.1.2.2 skrll SWAP32(d_nsectors); 187 1.1.2.2 skrll SWAP32(d_ntracks); 188 1.1.2.2 skrll SWAP32(d_ncylinders); 189 1.1.2.2 skrll SWAP32(d_secpercyl); 190 1.1.2.2 skrll SWAP32(d_secperunit); 191 1.1.2.2 skrll SWAP16(d_sparespertrack); 192 1.1.2.2 skrll SWAP16(d_sparespercyl); 193 1.1.2.2 skrll SWAP32(d_acylinders); 194 1.1.2.2 skrll SWAP16(d_rpm); 195 1.1.2.2 skrll SWAP16(d_interleave); 196 1.1.2.2 skrll SWAP16(d_trackskew); 197 1.1.2.2 skrll SWAP16(d_cylskew); 198 1.1.2.2 skrll SWAP32(d_headswitch); 199 1.1.2.2 skrll SWAP32(d_trkseek); 200 1.1.2.2 skrll SWAP32(d_flags); 201 1.1.2.2 skrll 202 1.1.2.2 skrll for (i = 0; i < NDDATA; i++) 203 1.1.2.2 skrll SWAP32(d_drivedata[i]); 204 1.1.2.2 skrll for (i = 0; i < NSPARE; i++) 205 1.1.2.2 skrll SWAP32(d_spare[i]); 206 1.1.2.2 skrll 207 1.1.2.2 skrll SWAP32(d_magic2); 208 1.1.2.2 skrll SWAP16(d_checksum); 209 1.1.2.2 skrll SWAP16(d_npartitions); 210 1.1.2.2 skrll SWAP32(d_bbsize); 211 1.1.2.2 skrll SWAP32(d_sbsize); 212 1.1.2.2 skrll 213 1.1.2.2 skrll for (i = 0; i < lp->d_npartitions; i++) { 214 1.1.2.2 skrll SWAP32(d_partitions[i].p_size); 215 1.1.2.2 skrll SWAP32(d_partitions[i].p_offset); 216 1.1.2.2 skrll SWAP32(d_partitions[i].p_fsize); 217 1.1.2.2 skrll SWAP16(d_partitions[i].p_cpg); 218 1.1.2.2 skrll } 219 1.1.2.2 skrll 220 1.1.2.2 skrll #undef SWAP16 221 1.1.2.2 skrll #undef SWAP32 222 1.1.2.2 skrll } 223 1.1.2.2 skrll 224 1.1.2.2 skrll static int 225 1.1.2.2 skrll validate_label(mbr_args_t *a, daddr_t label_sector, size_t label_offset) 226 1.1.2.2 skrll { 227 1.1.2.2 skrll struct disklabel *lp; 228 1.1.2.2 skrll caddr_t lp_lim; 229 1.1.2.2 skrll int i, error; 230 1.1.2.2 skrll 231 1.1.2.2 skrll error = dkwedge_read(a->pdk, a->vp, label_sector, a->buf, DEV_BSIZE); 232 1.1.2.2 skrll if (error) { 233 1.1.2.2 skrll aprint_error("%s: unable to read BSD disklabel @ %" PRId64 234 1.1.2.2 skrll ", error = %d\n", a->pdk->dk_name, label_sector, error); 235 1.1.2.2 skrll a->error = error; 236 1.1.2.2 skrll return (SCAN_ERROR); 237 1.1.2.2 skrll } 238 1.1.2.2 skrll 239 1.1.2.2 skrll /* 240 1.1.2.2 skrll * We ignore label_offset; this seems to have not been used 241 1.1.2.2 skrll * consistently in the old code, requiring us to do the search 242 1.1.2.2 skrll * in the sector. 243 1.1.2.2 skrll */ 244 1.1.2.2 skrll lp = a->buf; 245 1.1.2.2 skrll lp_lim = (caddr_t)a->buf + DEV_BSIZE - DISKLABEL_MINSIZE; 246 1.1.2.2 skrll for (;; lp = (void *)((caddr_t)lp + sizeof(uint32_t))) { 247 1.1.2.2 skrll if ((caddr_t)lp > lp_lim) 248 1.1.2.2 skrll return (SCAN_CONTINUE); 249 1.1.2.2 skrll label_offset = (size_t)((caddr_t)lp - (caddr_t)a->buf); 250 1.1.2.2 skrll if (lp->d_magic != DISKMAGIC || 251 1.1.2.2 skrll lp->d_magic != DISKMAGIC) { 252 1.1.2.2 skrll if (lp->d_magic == bswap32(DISKMAGIC) && 253 1.1.2.2 skrll lp->d_magic == bswap32(DISKMAGIC)) { 254 1.1.2.2 skrll /* 255 1.1.2.2 skrll * Label is in the other byte order; validate 256 1.1.2.2 skrll * its length, then byte-swap it. 257 1.1.2.2 skrll */ 258 1.1.2.2 skrll if ((caddr_t)lp + 259 1.1.2.2 skrll DISKLABEL_SIZE(bswap16(lp->d_npartitions)) > 260 1.1.2.2 skrll (caddr_t)a->buf + DEV_BSIZE) { 261 1.1.2.2 skrll aprint_error("%s: BSD disklabel @ " 262 1.1.2.2 skrll "%" PRId64 263 1.1.2.2 skrll "+%zd has bogus partition " 264 1.1.2.2 skrll "count (%u)\n", a->pdk->dk_name, 265 1.1.2.2 skrll label_sector, label_offset, 266 1.1.2.2 skrll bswap16(lp->d_npartitions)); 267 1.1.2.2 skrll continue; 268 1.1.2.2 skrll } 269 1.1.2.2 skrll swap_disklabel(lp); 270 1.1.2.2 skrll } else 271 1.1.2.2 skrll continue; 272 1.1.2.2 skrll } else { 273 1.1.2.2 skrll /* 274 1.1.2.2 skrll * Validate the disklabel length. 275 1.1.2.2 skrll */ 276 1.1.2.2 skrll if ((caddr_t)lp + DISKLABEL_SIZE(lp->d_npartitions) > 277 1.1.2.2 skrll (caddr_t)a->buf + DEV_BSIZE) { 278 1.1.2.2 skrll aprint_error("%s: BSD disklabel @ %" PRId64 279 1.1.2.2 skrll "+%zd has bogus partition count (%u)\n", 280 1.1.2.2 skrll a->pdk->dk_name, label_sector, 281 1.1.2.2 skrll label_offset, lp->d_npartitions); 282 1.1.2.2 skrll continue; 283 1.1.2.2 skrll } 284 1.1.2.2 skrll } 285 1.1.2.2 skrll 286 1.1.2.2 skrll /* 287 1.1.2.2 skrll * Disklabel is now in the right order and we have validated 288 1.1.2.2 skrll * the partition count, checksum it as the final check. 289 1.1.2.2 skrll */ 290 1.1.2.2 skrll if (dkcksum(lp) != 0) { 291 1.1.2.2 skrll aprint_error("%s: BSD disklabel @ %" PRId64 292 1.1.2.2 skrll "+%zd has bad checksum\n", a->pdk->dk_name, 293 1.1.2.2 skrll label_sector, label_offset); 294 1.1.2.2 skrll continue; 295 1.1.2.2 skrll } 296 1.1.2.2 skrll 297 1.1.2.2 skrll /* 298 1.1.2.2 skrll * Ok, we have a valid NetBSD disklabel, add wedges for it. 299 1.1.2.2 skrll */ 300 1.1.2.2 skrll for (i = 0; i < lp->d_npartitions; i++) { 301 1.1.2.2 skrll struct dkwedge_info dkw; 302 1.1.2.2 skrll struct partition *p; 303 1.1.2.2 skrll const char *ptype; 304 1.1.2.2 skrll 305 1.1.2.2 skrll p = &lp->d_partitions[i]; 306 1.1.2.2 skrll 307 1.1.2.2 skrll if (p->p_fstype == FS_UNUSED) 308 1.1.2.2 skrll continue; 309 1.1.2.2 skrll if ((ptype = 310 1.1.2.2 skrll bsdlabel_fstype_to_str(p->p_fstype)) == NULL) { 311 1.1.2.2 skrll /* 312 1.1.2.2 skrll * XXX Should probably just add these... 313 1.1.2.2 skrll * XXX maybe just have an empty ptype? 314 1.1.2.2 skrll */ 315 1.1.2.2 skrll aprint_verbose("%s: skipping partition %d, " 316 1.1.2.2 skrll "type %d\n", a->pdk->dk_name, i, 317 1.1.2.2 skrll p->p_fstype); 318 1.1.2.2 skrll continue; 319 1.1.2.2 skrll } 320 1.1.2.2 skrll strcpy(dkw.dkw_ptype, ptype); 321 1.1.2.2 skrll 322 1.1.2.2 skrll strcpy(dkw.dkw_parent, a->pdk->dk_name); 323 1.1.2.2 skrll dkw.dkw_offset = p->p_offset; 324 1.1.2.2 skrll dkw.dkw_size = p->p_size; 325 1.1.2.2 skrll 326 1.1.2.2 skrll /* 327 1.1.2.2 skrll * These get historical disk naming style 328 1.1.2.2 skrll * wedge names. 329 1.1.2.2 skrll */ 330 1.1.2.2 skrll snprintf(dkw.dkw_wname, sizeof(dkw.dkw_wname), 331 1.1.2.2 skrll "%s%c", a->pdk->dk_name, 'a' + i); 332 1.1.2.2 skrll 333 1.1.2.2 skrll error = dkwedge_add(&dkw); 334 1.1.2.2 skrll if (error == EEXIST) 335 1.1.2.2 skrll aprint_error("%s: wedge named '%s' already " 336 1.1.2.2 skrll "exists, manual intervention required\n", 337 1.1.2.2 skrll a->pdk->dk_name, dkw.dkw_wname); 338 1.1.2.2 skrll else if (error) 339 1.1.2.2 skrll aprint_error("%s: error %d adding partition " 340 1.1.2.2 skrll "%d type %d\n", a->pdk->dk_name, error, 341 1.1.2.2 skrll i, p->p_fstype); 342 1.1.2.2 skrll } 343 1.1.2.2 skrll return (SCAN_FOUND); 344 1.1.2.2 skrll } 345 1.1.2.2 skrll } 346 1.1.2.2 skrll 347 1.1.2.2 skrll static int 348 1.1.2.2 skrll scan_mbr(mbr_args_t *a, int (*actn)(mbr_args_t *, struct mbr_partition *, 349 1.1.2.2 skrll int, u_int)) 350 1.1.2.2 skrll { 351 1.1.2.2 skrll struct mbr_partition ptns[MBR_PART_COUNT]; 352 1.1.2.2 skrll struct mbr_partition *dp; 353 1.1.2.2 skrll struct mbr_sector *mbr; 354 1.1.2.2 skrll u_int ext_base, this_ext, next_ext; 355 1.1.2.2 skrll int i, rval; 356 1.1.2.2 skrll #ifdef COMPAT_386BSD_MBRPART 357 1.1.2.2 skrll int dp_386bsd = -1; 358 1.1.2.2 skrll #endif 359 1.1.2.2 skrll 360 1.1.2.2 skrll ext_base = 0; 361 1.1.2.2 skrll this_ext = 0; 362 1.1.2.2 skrll for (;;) { 363 1.1.2.2 skrll a->error = dkwedge_read(a->pdk, a->vp, this_ext, a->buf, 364 1.1.2.2 skrll DEV_BSIZE); 365 1.1.2.2 skrll if (a->error) { 366 1.1.2.2 skrll aprint_error("%s: unable to read MBR @ %u, " 367 1.1.2.2 skrll "error = %d\n", a->pdk->dk_name, this_ext, 368 1.1.2.2 skrll a->error); 369 1.1.2.2 skrll return (SCAN_ERROR); 370 1.1.2.2 skrll } 371 1.1.2.2 skrll 372 1.1.2.2 skrll mbr = a->buf; 373 1.1.2.2 skrll if (mbr->mbr_magic != htole16(MBR_MAGIC)) 374 1.1.2.2 skrll return (SCAN_CONTINUE); 375 1.1.2.2 skrll 376 1.1.2.2 skrll /* Copy data out of buffer so action can use the buffer. */ 377 1.1.2.2 skrll memcpy(ptns, &mbr->mbr_parts, sizeof(ptns)); 378 1.1.2.2 skrll 379 1.1.2.2 skrll /* Looks for NetBSD partition. */ 380 1.1.2.2 skrll next_ext = 0; 381 1.1.2.2 skrll dp = ptns; 382 1.1.2.2 skrll for (i = 0; i < MBR_PART_COUNT; i++, dp++) { 383 1.1.2.2 skrll if (dp->mbrp_type == 0) 384 1.1.2.2 skrll continue; 385 1.1.2.2 skrll if (MBR_IS_EXTENDED(dp->mbrp_type)) { 386 1.1.2.2 skrll next_ext = le32toh(dp->mbrp_start); 387 1.1.2.2 skrll continue; 388 1.1.2.2 skrll } 389 1.1.2.2 skrll #ifdef COMPAT_386BSD_MBRPART 390 1.1.2.2 skrll if (dp->mbrp_type == MBR_PTYPE_386BSD) { 391 1.1.2.2 skrll /* 392 1.1.2.2 skrll * If more than one matches, take last, 393 1.1.2.2 skrll * as NetBSD install tool does. 394 1.1.2.2 skrll */ 395 1.1.2.2 skrll if (this_ext == 0) 396 1.1.2.2 skrll dp_386bsd = i; 397 1.1.2.2 skrll continue; 398 1.1.2.2 skrll } 399 1.1.2.2 skrll #endif 400 1.1.2.2 skrll rval = (*actn)(a, dp, i, this_ext); 401 1.1.2.2 skrll if (rval != SCAN_CONTINUE) 402 1.1.2.2 skrll return (rval); 403 1.1.2.2 skrll } 404 1.1.2.2 skrll if (next_ext == 0) 405 1.1.2.2 skrll break; 406 1.1.2.2 skrll if (ext_base == 0) { 407 1.1.2.2 skrll ext_base = next_ext; 408 1.1.2.2 skrll next_ext = 0; 409 1.1.2.2 skrll } 410 1.1.2.2 skrll next_ext += ext_base; 411 1.1.2.2 skrll if (next_ext <= this_ext) 412 1.1.2.2 skrll break; 413 1.1.2.2 skrll this_ext = next_ext; 414 1.1.2.2 skrll } 415 1.1.2.2 skrll #ifdef COMPAT_386BSD_MBRPART 416 1.1.2.2 skrll if (this_ext == 0 && dp_386bsd != -1) 417 1.1.2.2 skrll return ((*actn)(a, &ptns[dp_386bsd], dp_386bsd, 0)); 418 1.1.2.2 skrll #endif 419 1.1.2.2 skrll return (SCAN_CONTINUE); 420 1.1.2.2 skrll } 421 1.1.2.2 skrll 422 1.1.2.2 skrll static int 423 1.1.2.2 skrll look_netbsd_part(mbr_args_t *a, struct mbr_partition *dp, int slot, 424 1.1.2.2 skrll u_int ext_base) 425 1.1.2.2 skrll { 426 1.1.2.2 skrll int ptn_base = ext_base + le32toh(dp->mbrp_start); 427 1.1.2.2 skrll int rval; 428 1.1.2.2 skrll 429 1.1.2.2 skrll if ( 430 1.1.2.2 skrll #ifdef COMPAT_386BSD_MBRPART 431 1.1.2.2 skrll dp->mbrp_type == MBR_PTYPE_386BSD || 432 1.1.2.2 skrll #endif 433 1.1.2.2 skrll dp->mbrp_type == MBR_PTYPE_NETBSD) { 434 1.1.2.2 skrll rval = validate_label(a, ptn_base + BSD44_MBR_LABELSECTOR, 0); 435 1.1.2.2 skrll 436 1.1.2.2 skrll /* If we got a NetBSD label, look no further. */ 437 1.1.2.2 skrll if (rval == SCAN_FOUND) 438 1.1.2.2 skrll return (rval); 439 1.1.2.2 skrll } 440 1.1.2.2 skrll 441 1.1.2.2 skrll return (SCAN_CONTINUE); 442 1.1.2.2 skrll } 443 1.1.2.2 skrll 444 1.1.2.2 skrll static int 445 1.1.2.2 skrll dkwedge_discover_bsdlabel(struct disk *pdk, struct vnode *vp) 446 1.1.2.2 skrll { 447 1.1.2.2 skrll mbr_args_t a; 448 1.1.2.2 skrll const struct disklabel_location *dl; 449 1.1.2.2 skrll int rval; 450 1.1.2.2 skrll 451 1.1.2.2 skrll a.pdk = pdk; 452 1.1.2.2 skrll a.vp = vp; 453 1.1.2.2 skrll a.buf = malloc(DEV_BSIZE, M_DEVBUF, M_WAITOK); 454 1.1.2.2 skrll a.error = 0; 455 1.1.2.2 skrll 456 1.1.2.2 skrll /* MBR search. */ 457 1.1.2.2 skrll rval = scan_mbr(&a, look_netbsd_part); 458 1.1.2.2 skrll if (rval != SCAN_CONTINUE) { 459 1.1.2.2 skrll if (rval == SCAN_FOUND) 460 1.1.2.2 skrll a.error = 0; /* found it, wedges installed */ 461 1.1.2.2 skrll goto out; 462 1.1.2.2 skrll } 463 1.1.2.2 skrll 464 1.1.2.2 skrll /* Known location search. */ 465 1.1.2.2 skrll for (dl = disklabel_locations; dl->label_sector != -1; dl++) { 466 1.1.2.2 skrll rval = validate_label(&a, dl->label_sector, dl->label_offset); 467 1.1.2.2 skrll if (rval != SCAN_CONTINUE) { 468 1.1.2.2 skrll if (rval == SCAN_FOUND) 469 1.1.2.2 skrll a.error = 0; /* found it, wedges installed */ 470 1.1.2.2 skrll goto out; 471 1.1.2.2 skrll } 472 1.1.2.2 skrll } 473 1.1.2.2 skrll 474 1.1.2.2 skrll /* No NetBSD disklabel found. */ 475 1.1.2.2 skrll a.error = ESRCH; 476 1.1.2.2 skrll out: 477 1.1.2.2 skrll free(a.buf, M_DEVBUF); 478 1.1.2.2 skrll return (a.error); 479 1.1.2.2 skrll } 480 1.1.2.2 skrll 481 1.1.2.2 skrll DKWEDGE_DISCOVERY_METHOD_DECL(BSD44, 5, dkwedge_discover_bsdlabel); 482
Indexes created Sun Oct 26 21:10:03 GMT 2025