sys/geom/part/g_part_gpt.c

   1 /*-
   2  * Copyright (c) 2002, 2005, 2006, 2007 Marcel Moolenaar
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <sys/param.h>
  31 #include <sys/bio.h>
  32 #include <sys/diskmbr.h>
  33 #include <sys/endian.h>
  34 #include <sys/gpt.h>
  35 #include <sys/kernel.h>
  36 #include <sys/kobj.h>
  37 #include <sys/limits.h>
  38 #include <sys/lock.h>
  39 #include <sys/malloc.h>
  40 #include <sys/mutex.h>
  41 #include <sys/queue.h>
  42 #include <sys/sbuf.h>
  43 #include <sys/systm.h>
  44 #include <sys/uuid.h>
  45 #include <geom/geom.h>
  46 #include <geom/part/g_part.h>
  47
  48 #include "g_part_if.h"
  49
  50 CTASSERT(offsetof(struct gpt_hdr, padding) == 92);
  51 CTASSERT(sizeof(struct gpt_ent) == 128);
  52
  53 #define EQUUID(a,b)     (memcmp(a, b, sizeof(struct uuid)) == 0)
  54
  55 #define MBRSIZE         512
  56
  57 enum gpt_elt {
  58         GPT_ELT_PRIHDR,
  59         GPT_ELT_PRITBL,
  60         GPT_ELT_SECHDR,
  61         GPT_ELT_SECTBL,
  62         GPT_ELT_COUNT
  63 };
  64
  65 enum gpt_state {
  66         GPT_STATE_UNKNOWN,      /* Not determined. */
  67         GPT_STATE_MISSING,      /* No signature found. */
  68         GPT_STATE_CORRUPT,      /* Checksum mismatch. */
  69         GPT_STATE_INVALID,      /* Nonconformant/invalid. */
  70         GPT_STATE_OK            /* Perfectly fine. */
  71 };
  72
  73 struct g_part_gpt_table {
  74         struct g_part_table     base;
  75         u_char                  mbr[MBRSIZE];
  76         struct gpt_hdr          *hdr;
  77         quad_t                  lba[GPT_ELT_COUNT];
  78         enum gpt_state          state[GPT_ELT_COUNT];
  79 };
  80
  81 struct g_part_gpt_entry {
  82         struct g_part_entry     base;
  83         struct gpt_ent          ent;
  84 };
  85
  86 static void g_gpt_printf_utf16(struct sbuf *, uint16_t *, size_t);
  87 static void g_gpt_utf8_to_utf16(const uint8_t *, uint16_t *, size_t);
  88 static void g_gpt_set_defaults(struct g_part_table *, struct g_provider *);
  89
  90 static int g_part_gpt_add(struct g_part_table *, struct g_part_entry *,
  91     struct g_part_parms *);
  92 static int g_part_gpt_bootcode(struct g_part_table *, struct g_part_parms *);
  93 static int g_part_gpt_create(struct g_part_table *, struct g_part_parms *);
  94 static int g_part_gpt_destroy(struct g_part_table *, struct g_part_parms *);
  95 static void g_part_gpt_dumpconf(struct g_part_table *, struct g_part_entry *,
  96     struct sbuf *, const char *);
  97 static int g_part_gpt_dumpto(struct g_part_table *, struct g_part_entry *);
  98 static int g_part_gpt_modify(struct g_part_table *, struct g_part_entry *,
  99     struct g_part_parms *);
 100 static const char *g_part_gpt_name(struct g_part_table *, struct g_part_entry *,
 101     char *, size_t);
 102 static int g_part_gpt_probe(struct g_part_table *, struct g_consumer *);
 103 static int g_part_gpt_read(struct g_part_table *, struct g_consumer *);
 104 static int g_part_gpt_setunset(struct g_part_table *table,
 105     struct g_part_entry *baseentry, const char *attrib, unsigned int set);
 106 static const char *g_part_gpt_type(struct g_part_table *, struct g_part_entry *,
 107     char *, size_t);
 108 static int g_part_gpt_write(struct g_part_table *, struct g_consumer *);
 109 static int g_part_gpt_resize(struct g_part_table *, struct g_part_entry *,
 110     struct g_part_parms *);
 111 static int g_part_gpt_recover(struct g_part_table *);
 112
 113 static kobj_method_t g_part_gpt_methods[] = {
 114         KOBJMETHOD(g_part_add,          g_part_gpt_add),
 115         KOBJMETHOD(g_part_bootcode,     g_part_gpt_bootcode),
 116         KOBJMETHOD(g_part_create,       g_part_gpt_create),
 117         KOBJMETHOD(g_part_destroy,      g_part_gpt_destroy),
 118         KOBJMETHOD(g_part_dumpconf,     g_part_gpt_dumpconf),
 119         KOBJMETHOD(g_part_dumpto,       g_part_gpt_dumpto),
 120         KOBJMETHOD(g_part_modify,       g_part_gpt_modify),
 121         KOBJMETHOD(g_part_resize,       g_part_gpt_resize),
 122         KOBJMETHOD(g_part_name,         g_part_gpt_name),
 123         KOBJMETHOD(g_part_probe,        g_part_gpt_probe),
 124         KOBJMETHOD(g_part_read,         g_part_gpt_read),
 125         KOBJMETHOD(g_part_recover,      g_part_gpt_recover),
 126         KOBJMETHOD(g_part_setunset,     g_part_gpt_setunset),
 127         KOBJMETHOD(g_part_type,         g_part_gpt_type),
 128         KOBJMETHOD(g_part_write,        g_part_gpt_write),
 129         { 0, 0 }
 130 };
 131
 132 static struct g_part_scheme g_part_gpt_scheme = {
 133         "GPT",
 134         g_part_gpt_methods,
 135         sizeof(struct g_part_gpt_table),
 136         .gps_entrysz = sizeof(struct g_part_gpt_entry),
 137         .gps_minent = 128,
 138         .gps_maxent = 4096,
 139         .gps_bootcodesz = MBRSIZE,
 140 };
 141 G_PART_SCHEME_DECLARE(g_part_gpt);
 142
 143 static struct uuid gpt_uuid_apple_boot = GPT_ENT_TYPE_APPLE_BOOT;
 144 static struct uuid gpt_uuid_apple_hfs = GPT_ENT_TYPE_APPLE_HFS;
 145 static struct uuid gpt_uuid_apple_label = GPT_ENT_TYPE_APPLE_LABEL;
 146 static struct uuid gpt_uuid_apple_raid = GPT_ENT_TYPE_APPLE_RAID;
 147 static struct uuid gpt_uuid_apple_raid_offline = GPT_ENT_TYPE_APPLE_RAID_OFFLINE;
 148 static struct uuid gpt_uuid_apple_tv_recovery = GPT_ENT_TYPE_APPLE_TV_RECOVERY;
 149 static struct uuid gpt_uuid_apple_ufs = GPT_ENT_TYPE_APPLE_UFS;
 150 static struct uuid gpt_uuid_bios_boot = GPT_ENT_TYPE_BIOS_BOOT;
 151 static struct uuid gpt_uuid_efi = GPT_ENT_TYPE_EFI;
 152 static struct uuid gpt_uuid_freebsd = GPT_ENT_TYPE_FREEBSD;
 153 static struct uuid gpt_uuid_freebsd_boot = GPT_ENT_TYPE_FREEBSD_BOOT;
 154 static struct uuid gpt_uuid_freebsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP;
 155 static struct uuid gpt_uuid_freebsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS;
 156 static struct uuid gpt_uuid_freebsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM;
 157 static struct uuid gpt_uuid_freebsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS;
 158 static struct uuid gpt_uuid_linux_data = GPT_ENT_TYPE_LINUX_DATA;
 159 static struct uuid gpt_uuid_linux_lvm = GPT_ENT_TYPE_LINUX_LVM;
 160 static struct uuid gpt_uuid_linux_raid = GPT_ENT_TYPE_LINUX_RAID;
 161 static struct uuid gpt_uuid_linux_swap = GPT_ENT_TYPE_LINUX_SWAP;
 162 static struct uuid gpt_uuid_ms_basic_data = GPT_ENT_TYPE_MS_BASIC_DATA;
 163 static struct uuid gpt_uuid_ms_reserved = GPT_ENT_TYPE_MS_RESERVED;
 164 static struct uuid gpt_uuid_ms_ldm_data = GPT_ENT_TYPE_MS_LDM_DATA;
 165 static struct uuid gpt_uuid_ms_ldm_metadata = GPT_ENT_TYPE_MS_LDM_METADATA;
 166 static struct uuid gpt_uuid_netbsd_ccd = GPT_ENT_TYPE_NETBSD_CCD;
 167 static struct uuid gpt_uuid_netbsd_cgd = GPT_ENT_TYPE_NETBSD_CGD;
 168 static struct uuid gpt_uuid_netbsd_ffs = GPT_ENT_TYPE_NETBSD_FFS;
 169 static struct uuid gpt_uuid_netbsd_lfs = GPT_ENT_TYPE_NETBSD_LFS;
 170 static struct uuid gpt_uuid_netbsd_raid = GPT_ENT_TYPE_NETBSD_RAID;
 171 static struct uuid gpt_uuid_netbsd_swap = GPT_ENT_TYPE_NETBSD_SWAP;
 172 static struct uuid gpt_uuid_mbr = GPT_ENT_TYPE_MBR;
 173 static struct uuid gpt_uuid_unused = GPT_ENT_TYPE_UNUSED;
 174
 175 static struct g_part_uuid_alias {
 176         struct uuid *uuid;
 177         int alias;
 178 } gpt_uuid_alias_match[] = {
 179         { &gpt_uuid_apple_boot,         G_PART_ALIAS_APPLE_BOOT },
 180         { &gpt_uuid_apple_hfs,          G_PART_ALIAS_APPLE_HFS },
 181         { &gpt_uuid_apple_label,        G_PART_ALIAS_APPLE_LABEL },
 182         { &gpt_uuid_apple_raid,         G_PART_ALIAS_APPLE_RAID },
 183         { &gpt_uuid_apple_raid_offline, G_PART_ALIAS_APPLE_RAID_OFFLINE },
 184         { &gpt_uuid_apple_tv_recovery,  G_PART_ALIAS_APPLE_TV_RECOVERY },
 185         { &gpt_uuid_apple_ufs,          G_PART_ALIAS_APPLE_UFS },
 186         { &gpt_uuid_bios_boot,          G_PART_ALIAS_BIOS_BOOT },
 187         { &gpt_uuid_efi,                G_PART_ALIAS_EFI },
 188         { &gpt_uuid_freebsd,            G_PART_ALIAS_FREEBSD },
 189         { &gpt_uuid_freebsd_boot,       G_PART_ALIAS_FREEBSD_BOOT },
 190         { &gpt_uuid_freebsd_swap,       G_PART_ALIAS_FREEBSD_SWAP },
 191         { &gpt_uuid_freebsd_ufs,        G_PART_ALIAS_FREEBSD_UFS },
 192         { &gpt_uuid_freebsd_vinum,      G_PART_ALIAS_FREEBSD_VINUM },
 193         { &gpt_uuid_freebsd_zfs,        G_PART_ALIAS_FREEBSD_ZFS },
 194         { &gpt_uuid_linux_data,         G_PART_ALIAS_LINUX_DATA },
 195         { &gpt_uuid_linux_lvm,          G_PART_ALIAS_LINUX_LVM },
 196         { &gpt_uuid_linux_raid,         G_PART_ALIAS_LINUX_RAID },
 197         { &gpt_uuid_linux_swap,         G_PART_ALIAS_LINUX_SWAP },
 198         { &gpt_uuid_mbr,                G_PART_ALIAS_MBR },
 199         { &gpt_uuid_ms_basic_data,      G_PART_ALIAS_MS_BASIC_DATA },
 200         { &gpt_uuid_ms_ldm_data,        G_PART_ALIAS_MS_LDM_DATA },
 201         { &gpt_uuid_ms_ldm_metadata,    G_PART_ALIAS_MS_LDM_METADATA },
 202         { &gpt_uuid_ms_reserved,        G_PART_ALIAS_MS_RESERVED },
 203         { &gpt_uuid_netbsd_ccd,         G_PART_ALIAS_NETBSD_CCD },
 204         { &gpt_uuid_netbsd_cgd,         G_PART_ALIAS_NETBSD_CGD },
 205         { &gpt_uuid_netbsd_ffs,         G_PART_ALIAS_NETBSD_FFS },
 206         { &gpt_uuid_netbsd_lfs,         G_PART_ALIAS_NETBSD_LFS },
 207         { &gpt_uuid_netbsd_raid,        G_PART_ALIAS_NETBSD_RAID },
 208         { &gpt_uuid_netbsd_swap,        G_PART_ALIAS_NETBSD_SWAP },
 209
 210         { NULL, 0 }
 211 };
 212
 213 static struct gpt_hdr *
 214 gpt_read_hdr(struct g_part_gpt_table *table, struct g_consumer *cp,
 215     enum gpt_elt elt)
 216 {
 217         struct gpt_hdr *buf, *hdr;
 218         struct g_provider *pp;
 219         quad_t lba, last;
 220         int error;
 221         uint32_t crc, sz;
 222
 223         pp = cp->provider;
 224         last = (pp->mediasize / pp->sectorsize) - 1;
 225         table->state[elt] = GPT_STATE_MISSING;
 226         /*
 227          * If the primary header is valid look for secondary
 228          * header in AlternateLBA, otherwise in the last medium's LBA.
 229          */
 230         if (elt == GPT_ELT_SECHDR) {
 231                 if (table->state[GPT_ELT_PRIHDR] != GPT_STATE_OK)
 232                         table->lba[elt] = last;
 233         } else
 234                 table->lba[elt] = 1;
 235         buf = g_read_data(cp, table->lba[elt] * pp->sectorsize, pp->sectorsize,
 236             &error);
 237         if (buf == NULL)
 238                 return (NULL);
 239         hdr = NULL;
 240         if (memcmp(buf->hdr_sig, GPT_HDR_SIG, sizeof(buf->hdr_sig)) != 0)
 241                 goto fail;
 242
 243         table->state[elt] = GPT_STATE_CORRUPT;
 244         sz = le32toh(buf->hdr_size);
 245         if (sz < 92 || sz > pp->sectorsize)
 246                 goto fail;
 247
 248         hdr = g_malloc(sz, M_WAITOK | M_ZERO);
 249         bcopy(buf, hdr, sz);
 250         hdr->hdr_size = sz;
 251
 252         crc = le32toh(buf->hdr_crc_self);
 253         buf->hdr_crc_self = 0;
 254         if (crc32(buf, sz) != crc)
 255                 goto fail;
 256         hdr->hdr_crc_self = crc;
 257
 258         table->state[elt] = GPT_STATE_INVALID;
 259         hdr->hdr_revision = le32toh(buf->hdr_revision);
 260         if (hdr->hdr_revision < GPT_HDR_REVISION)
 261                 goto fail;
 262         hdr->hdr_lba_self = le64toh(buf->hdr_lba_self);
 263         if (hdr->hdr_lba_self != table->lba[elt])
 264                 goto fail;
 265         hdr->hdr_lba_alt = le64toh(buf->hdr_lba_alt);
 266         if (hdr->hdr_lba_alt == hdr->hdr_lba_self ||
 267             hdr->hdr_lba_alt > last)
 268                 goto fail;
 269
 270         /* Check the managed area. */
 271         hdr->hdr_lba_start = le64toh(buf->hdr_lba_start);
 272         if (hdr->hdr_lba_start < 2 || hdr->hdr_lba_start >= last)
 273                 goto fail;
 274         hdr->hdr_lba_end = le64toh(buf->hdr_lba_end);
 275         if (hdr->hdr_lba_end < hdr->hdr_lba_start || hdr->hdr_lba_end >= last)
 276                 goto fail;
 277
 278         /* Check the table location and size of the table. */
 279         hdr->hdr_entries = le32toh(buf->hdr_entries);
 280         hdr->hdr_entsz = le32toh(buf->hdr_entsz);
 281         if (hdr->hdr_entries == 0 || hdr->hdr_entsz < 128 ||
 282             (hdr->hdr_entsz & 7) != 0)
 283                 goto fail;
 284         hdr->hdr_lba_table = le64toh(buf->hdr_lba_table);
 285         if (hdr->hdr_lba_table < 2 || hdr->hdr_lba_table >= last)
 286                 goto fail;
 287         if (hdr->hdr_lba_table >= hdr->hdr_lba_start &&
 288             hdr->hdr_lba_table <= hdr->hdr_lba_end)
 289                 goto fail;
 290         lba = hdr->hdr_lba_table +
 291             (hdr->hdr_entries * hdr->hdr_entsz + pp->sectorsize - 1) /
 292             pp->sectorsize - 1;
 293         if (lba >= last)
 294                 goto fail;
 295         if (lba >= hdr->hdr_lba_start && lba <= hdr->hdr_lba_end)
 296                 goto fail;
 297
 298         table->state[elt] = GPT_STATE_OK;
 299         le_uuid_dec(&buf->hdr_uuid, &hdr->hdr_uuid);
 300         hdr->hdr_crc_table = le32toh(buf->hdr_crc_table);
 301
 302         /* save LBA for secondary header */
 303         if (elt == GPT_ELT_PRIHDR)
 304                 table->lba[GPT_ELT_SECHDR] = hdr->hdr_lba_alt;
 305
 306         g_free(buf);
 307         return (hdr);
 308
 309  fail:
 310         if (hdr != NULL)
 311                 g_free(hdr);
 312         g_free(buf);
 313         return (NULL);
 314 }
 315
 316 static struct gpt_ent *
 317 gpt_read_tbl(struct g_part_gpt_table *table, struct g_consumer *cp,
 318     enum gpt_elt elt, struct gpt_hdr *hdr)
 319 {
 320         struct g_provider *pp;
 321         struct gpt_ent *ent, *tbl;
 322         char *buf, *p;
 323         unsigned int idx, sectors, tblsz, size;
 324         int error;
 325
 326         if (hdr == NULL)
 327                 return (NULL);
 328
 329         pp = cp->provider;
 330         table->lba[elt] = hdr->hdr_lba_table;
 331
 332         table->state[elt] = GPT_STATE_MISSING;
 333         tblsz = hdr->hdr_entries * hdr->hdr_entsz;
 334         sectors = (tblsz + pp->sectorsize - 1) / pp->sectorsize;
 335         buf = g_malloc(sectors * pp->sectorsize, M_WAITOK | M_ZERO);
 336         for (idx = 0; idx < sectors; idx += MAXPHYS / pp->sectorsize) {
 337                 size = (sectors - idx > MAXPHYS / pp->sectorsize) ?  MAXPHYS:
 338                     (sectors - idx) * pp->sectorsize;
 339                 p = g_read_data(cp, (table->lba[elt] + idx) * pp->sectorsize,
 340                     size, &error);
 341                 if (p == NULL) {
 342                         g_free(buf);
 343                         return (NULL);
 344                 }
 345                 bcopy(p, buf + idx * pp->sectorsize, size);
 346                 g_free(p);
 347         }
 348         table->state[elt] = GPT_STATE_CORRUPT;
 349         if (crc32(buf, tblsz) != hdr->hdr_crc_table) {
 350                 g_free(buf);
 351                 return (NULL);
 352         }
 353
 354         table->state[elt] = GPT_STATE_OK;
 355         tbl = g_malloc(hdr->hdr_entries * sizeof(struct gpt_ent),
 356             M_WAITOK | M_ZERO);
 357
 358         for (idx = 0, ent = tbl, p = buf;
 359              idx < hdr->hdr_entries;
 360              idx++, ent++, p += hdr->hdr_entsz) {
 361                 le_uuid_dec(p, &ent->ent_type);
 362                 le_uuid_dec(p + 16, &ent->ent_uuid);
 363                 ent->ent_lba_start = le64dec(p + 32);
 364                 ent->ent_lba_end = le64dec(p + 40);
 365                 ent->ent_attr = le64dec(p + 48);
 366                 /* Keep UTF-16 in little-endian. */
 367                 bcopy(p + 56, ent->ent_name, sizeof(ent->ent_name));
 368         }
 369
 370         g_free(buf);
 371         return (tbl);
 372 }
 373
 374 static int
 375 gpt_matched_hdrs(struct gpt_hdr *pri, struct gpt_hdr *sec)
 376 {
 377
 378         if (pri == NULL || sec == NULL)
 379                 return (0);
 380
 381         if (!EQUUID(&pri->hdr_uuid, &sec->hdr_uuid))
 382                 return (0);
 383         return ((pri->hdr_revision == sec->hdr_revision &&
 384             pri->hdr_size == sec->hdr_size &&
 385             pri->hdr_lba_start == sec->hdr_lba_start &&
 386             pri->hdr_lba_end == sec->hdr_lba_end &&
 387             pri->hdr_entries == sec->hdr_entries &&
 388             pri->hdr_entsz == sec->hdr_entsz &&
 389             pri->hdr_crc_table == sec->hdr_crc_table) ? 1 : 0);
 390 }
 391
 392 static int
 393 gpt_parse_type(const char *type, struct uuid *uuid)
 394 {
 395         struct uuid tmp;
 396         const char *alias;
 397         int error;
 398         struct g_part_uuid_alias *uap;
 399
 400         if (type[0] == '!') {
 401                 error = parse_uuid(type + 1, &tmp);
 402                 if (error)
 403                         return (error);
 404                 if (EQUUID(&tmp, &gpt_uuid_unused))
 405                         return (EINVAL);
 406                 *uuid = tmp;
 407                 return (0);
 408         }
 409         for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++) {
 410                 alias = g_part_alias_name(uap->alias);
 411                 if (!strcasecmp(type, alias)) {
 412                         *uuid = *uap->uuid;
 413                         return (0);
 414                 }
 415         }
 416         return (EINVAL);
 417 }
 418
 419 static int
 420 g_part_gpt_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
 421     struct g_part_parms *gpp)
 422 {
 423         struct g_part_gpt_entry *entry;
 424         int error;
 425
 426         entry = (struct g_part_gpt_entry *)baseentry;
 427         error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type);
 428         if (error)
 429                 return (error);
 430         kern_uuidgen(&entry->ent.ent_uuid, 1);
 431         entry->ent.ent_lba_start = baseentry->gpe_start;
 432         entry->ent.ent_lba_end = baseentry->gpe_end;
 433         if (baseentry->gpe_deleted) {
 434                 entry->ent.ent_attr = 0;
 435                 bzero(entry->ent.ent_name, sizeof(entry->ent.ent_name));
 436         }
 437         if (gpp->gpp_parms & G_PART_PARM_LABEL)
 438                 g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name,
 439                     sizeof(entry->ent.ent_name) /
 440                     sizeof(entry->ent.ent_name[0]));
 441         return (0);
 442 }
 443
 444 static int
 445 g_part_gpt_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp)
 446 {
 447         struct g_part_gpt_table *table;
 448         size_t codesz;
 449
 450         codesz = DOSPARTOFF;
 451         table = (struct g_part_gpt_table *)basetable;
 452         bzero(table->mbr, codesz);
 453         codesz = MIN(codesz, gpp->gpp_codesize);
 454         if (codesz > 0)
 455                 bcopy(gpp->gpp_codeptr, table->mbr, codesz);
 456
 457         /* Mark the PMBR active since some BIOS require it */
 458         table->mbr[DOSPARTOFF] = 0x80;          /* status */
 459         return (0);
 460 }
 461
 462 static int
 463 g_part_gpt_create(struct g_part_table *basetable, struct g_part_parms *gpp)
 464 {
 465         struct g_provider *pp;
 466         struct g_part_gpt_table *table;
 467         quad_t last;
 468         size_t tblsz;
 469
 470         /* We don't nest, which means that our depth should be 0. */
 471         if (basetable->gpt_depth != 0)
 472                 return (ENXIO);
 473
 474         table = (struct g_part_gpt_table *)basetable;
 475         pp = gpp->gpp_provider;
 476         tblsz = (basetable->gpt_entries * sizeof(struct gpt_ent) +
 477             pp->sectorsize - 1) / pp->sectorsize;
 478         if (pp->sectorsize < MBRSIZE ||
 479             pp->mediasize < (3 + 2 * tblsz + basetable->gpt_entries) *
 480             pp->sectorsize)
 481                 return (ENOSPC);
 482
 483         last = (pp->mediasize / pp->sectorsize) - 1;
 484
 485         le16enc(table->mbr + DOSMAGICOFFSET, DOSMAGIC);
 486         table->mbr[DOSPARTOFF + 1] = 0x01;              /* shd */
 487         table->mbr[DOSPARTOFF + 2] = 0x01;              /* ssect */
 488         table->mbr[DOSPARTOFF + 3] = 0x00;              /* scyl */
 489         table->mbr[DOSPARTOFF + 4] = 0xee;              /* typ */
 490         table->mbr[DOSPARTOFF + 5] = 0xff;              /* ehd */
 491         table->mbr[DOSPARTOFF + 6] = 0xff;              /* esect */
 492         table->mbr[DOSPARTOFF + 7] = 0xff;              /* ecyl */
 493         le32enc(table->mbr + DOSPARTOFF + 8, 1);        /* start */
 494         le32enc(table->mbr + DOSPARTOFF + 12, MIN(last, UINT32_MAX));
 495
 496         /* Allocate space for the header */
 497         table->hdr = g_malloc(sizeof(struct gpt_hdr), M_WAITOK | M_ZERO);
 498
 499         bcopy(GPT_HDR_SIG, table->hdr->hdr_sig, sizeof(table->hdr->hdr_sig));
 500         table->hdr->hdr_revision = GPT_HDR_REVISION;
 501         table->hdr->hdr_size = offsetof(struct gpt_hdr, padding);
 502         kern_uuidgen(&table->hdr->hdr_uuid, 1);
 503         table->hdr->hdr_entries = basetable->gpt_entries;
 504         table->hdr->hdr_entsz = sizeof(struct gpt_ent);
 505
 506         g_gpt_set_defaults(basetable, pp);
 507         return (0);
 508 }
 509
 510 static int
 511 g_part_gpt_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
 512 {
 513         struct g_part_gpt_table *table;
 514         struct g_provider *pp;
 515
 516         table = (struct g_part_gpt_table *)basetable;
 517         pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider;
 518         g_free(table->hdr);
 519         table->hdr = NULL;
 520
 521         /*
 522          * Wipe the first 2 sectors to clear the partitioning. Wipe the last
 523          * sector only if it has valid secondary header.
 524          */
 525         basetable->gpt_smhead |= 3;
 526         if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK &&
 527             table->lba[GPT_ELT_SECHDR] == pp->mediasize / pp->sectorsize - 1)
 528                 basetable->gpt_smtail |= 1;
 529         return (0);
 530 }
 531
 532 static void
 533 g_part_gpt_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry,
 534     struct sbuf *sb, const char *indent)
 535 {
 536         struct g_part_gpt_entry *entry;
 537
 538         entry = (struct g_part_gpt_entry *)baseentry;
 539         if (indent == NULL) {
 540                 /* conftxt: libdisk compatibility */
 541                 sbuf_printf(sb, " xs GPT xt ");
 542                 sbuf_printf_uuid(sb, &entry->ent.ent_type);
 543         } else if (entry != NULL) {
 544                 /* confxml: partition entry information */
 545                 sbuf_printf(sb, "%s<label>", indent);
 546                 g_gpt_printf_utf16(sb, entry->ent.ent_name,
 547                     sizeof(entry->ent.ent_name) >> 1);
 548                 sbuf_printf(sb, "</label>\n");
 549                 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTME)
 550                         sbuf_printf(sb, "%s<attrib>bootme</attrib>\n", indent);
 551                 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTONCE) {
 552                         sbuf_printf(sb, "%s<attrib>bootonce</attrib>\n",
 553                             indent);
 554                 }
 555                 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTFAILED) {
 556                         sbuf_printf(sb, "%s<attrib>bootfailed</attrib>\n",
 557                             indent);
 558                 }
 559                 sbuf_printf(sb, "%s<rawtype>", indent);
 560                 sbuf_printf_uuid(sb, &entry->ent.ent_type);
 561                 sbuf_printf(sb, "</rawtype>\n");
 562                 sbuf_printf(sb, "%s<rawuuid>", indent);
 563                 sbuf_printf_uuid(sb, &entry->ent.ent_uuid);
 564                 sbuf_printf(sb, "</rawuuid>\n");
 565         } else {
 566                 /* confxml: scheme information */
 567         }
 568 }
 569
 570 static int
 571 g_part_gpt_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
 572 {
 573         struct g_part_gpt_entry *entry;
 574
 575         entry = (struct g_part_gpt_entry *)baseentry;
 576         return ((EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd_swap) ||
 577             EQUUID(&entry->ent.ent_type, &gpt_uuid_linux_swap)) ? 1 : 0);
 578 }
 579
 580 static int
 581 g_part_gpt_modify(struct g_part_table *basetable,
 582     struct g_part_entry *baseentry, struct g_part_parms *gpp)
 583 {
 584         struct g_part_gpt_entry *entry;
 585         int error;
 586
 587         entry = (struct g_part_gpt_entry *)baseentry;
 588         if (gpp->gpp_parms & G_PART_PARM_TYPE) {
 589                 error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type);
 590                 if (error)
 591                         return (error);
 592         }
 593         if (gpp->gpp_parms & G_PART_PARM_LABEL)
 594                 g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name,
 595                     sizeof(entry->ent.ent_name) /
 596                     sizeof(entry->ent.ent_name[0]));
 597         return (0);
 598 }
 599
 600 static int
 601 g_part_gpt_resize(struct g_part_table *basetable,
 602     struct g_part_entry *baseentry, struct g_part_parms *gpp)
 603 {
 604         struct g_part_gpt_entry *entry;
 605         entry = (struct g_part_gpt_entry *)baseentry;
 606
 607         baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1;
 608         entry->ent.ent_lba_end = baseentry->gpe_end;
 609
 610         return (0);
 611 }
 612
 613 static const char *
 614 g_part_gpt_name(struct g_part_table *table, struct g_part_entry *baseentry,
 615     char *buf, size_t bufsz)
 616 {
 617         struct g_part_gpt_entry *entry;
 618         char c;
 619
 620         entry = (struct g_part_gpt_entry *)baseentry;
 621         c = (EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd)) ? 's' : 'p';
 622         snprintf(buf, bufsz, "%c%d", c, baseentry->gpe_index);
 623         return (buf);
 624 }
 625
 626 static int
 627 g_part_gpt_probe(struct g_part_table *table, struct g_consumer *cp)
 628 {
 629         struct g_provider *pp;
 630         char *buf;
 631         int error, res;
 632
 633         /* We don't nest, which means that our depth should be 0. */
 634         if (table->gpt_depth != 0)
 635                 return (ENXIO);
 636
 637         pp = cp->provider;
 638
 639         /*
 640          * Sanity-check the provider. Since the first sector on the provider
 641          * must be a PMBR and a PMBR is 512 bytes large, the sector size
 642          * must be at least 512 bytes.  Also, since the theoretical minimum
 643          * number of sectors needed by GPT is 6, any medium that has less
 644          * than 6 sectors is never going to be able to hold a GPT. The
 645          * number 6 comes from:
 646          *      1 sector for the PMBR
 647          *      2 sectors for the GPT headers (each 1 sector)
 648          *      2 sectors for the GPT tables (each 1 sector)
 649          *      1 sector for an actual partition
 650          * It's better to catch this pathological case early than behaving
 651          * pathologically later on...
 652          */
 653         if (pp->sectorsize < MBRSIZE || pp->mediasize < 6 * pp->sectorsize)
 654                 return (ENOSPC);
 655
 656         /* Check that there's a MBR. */
 657         buf = g_read_data(cp, 0L, pp->sectorsize, &error);
 658         if (buf == NULL)
 659                 return (error);
 660         res = le16dec(buf + DOSMAGICOFFSET);
 661         g_free(buf);
 662         if (res != DOSMAGIC)
 663                 return (ENXIO);
 664
 665         /* Check that there's a primary header. */
 666         buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error);
 667         if (buf == NULL)
 668                 return (error);
 669         res = memcmp(buf, GPT_HDR_SIG, 8);
 670         g_free(buf);
 671         if (res == 0)
 672                 return (G_PART_PROBE_PRI_HIGH);
 673
 674         /* No primary? Check that there's a secondary. */
 675         buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize,
 676             &error);
 677         if (buf == NULL)
 678                 return (error);
 679         res = memcmp(buf, GPT_HDR_SIG, 8);
 680         g_free(buf);
 681         return ((res == 0) ? G_PART_PROBE_PRI_HIGH : ENXIO);
 682 }
 683
 684 static int
 685 g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp)
 686 {
 687         struct gpt_hdr *prihdr, *sechdr;
 688         struct gpt_ent *tbl, *pritbl, *sectbl;
 689         struct g_provider *pp;
 690         struct g_part_gpt_table *table;
 691         struct g_part_gpt_entry *entry;
 692         u_char *buf;
 693         uint64_t last;
 694         int error, index;
 695
 696         table = (struct g_part_gpt_table *)basetable;
 697         pp = cp->provider;
 698         last = (pp->mediasize / pp->sectorsize) - 1;
 699
 700         /* Read the PMBR */
 701         buf = g_read_data(cp, 0, pp->sectorsize, &error);
 702         if (buf == NULL)
 703                 return (error);
 704         bcopy(buf, table->mbr, MBRSIZE);
 705         g_free(buf);
 706
 707         /* Read the primary header and table. */
 708         prihdr = gpt_read_hdr(table, cp, GPT_ELT_PRIHDR);
 709         if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK) {
 710                 pritbl = gpt_read_tbl(table, cp, GPT_ELT_PRITBL, prihdr);
 711         } else {
 712                 table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING;
 713                 pritbl = NULL;
 714         }
 715
 716         /* Read the secondary header and table. */
 717         sechdr = gpt_read_hdr(table, cp, GPT_ELT_SECHDR);
 718         if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK) {
 719                 sectbl = gpt_read_tbl(table, cp, GPT_ELT_SECTBL, sechdr);
 720         } else {
 721                 table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING;
 722                 sectbl = NULL;
 723         }
 724
 725         /* Fail if we haven't got any good tables at all. */
 726         if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK &&
 727             table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) {
 728                 printf("GEOM: %s: corrupt or invalid GPT detected.\n",
 729                     pp->name);
 730                 printf("GEOM: %s: GPT rejected -- may not be recoverable.\n",
 731                     pp->name);
 732                 return (EINVAL);
 733         }
 734
 735         /*
 736          * If both headers are good but they disagree with each other,
 737          * then invalidate one. We prefer to keep the primary header,
 738          * unless the primary table is corrupt.
 739          */
 740         if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK &&
 741             table->state[GPT_ELT_SECHDR] == GPT_STATE_OK &&
 742             !gpt_matched_hdrs(prihdr, sechdr)) {
 743                 if (table->state[GPT_ELT_PRITBL] == GPT_STATE_OK) {
 744                         table->state[GPT_ELT_SECHDR] = GPT_STATE_INVALID;
 745                         table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING;
 746                         g_free(sechdr);
 747                         sechdr = NULL;
 748                 } else {
 749                         table->state[GPT_ELT_PRIHDR] = GPT_STATE_INVALID;
 750                         table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING;
 751                         g_free(prihdr);
 752                         prihdr = NULL;
 753                 }
 754         }
 755
 756         if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK) {
 757                 printf("GEOM: %s: the primary GPT table is corrupt or "
 758                     "invalid.\n", pp->name);
 759                 printf("GEOM: %s: using the secondary instead -- recovery "
 760                     "strongly advised.\n", pp->name);
 761                 table->hdr = sechdr;
 762                 basetable->gpt_corrupt = 1;
 763                 if (prihdr != NULL)
 764                         g_free(prihdr);
 765                 tbl = sectbl;
 766                 if (pritbl != NULL)
 767                         g_free(pritbl);
 768         } else {
 769                 if (table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) {
 770                         printf("GEOM: %s: the secondary GPT table is corrupt "
 771                             "or invalid.\n", pp->name);
 772                         printf("GEOM: %s: using the primary only -- recovery "
 773                             "suggested.\n", pp->name);
 774                         basetable->gpt_corrupt = 1;
 775                 } else if (table->lba[GPT_ELT_SECHDR] != last) {
 776                         printf( "GEOM: %s: the secondary GPT header is not in "
 777                             "the last LBA.\n", pp->name);
 778                         basetable->gpt_corrupt = 1;
 779                 }
 780                 table->hdr = prihdr;
 781                 if (sechdr != NULL)
 782                         g_free(sechdr);
 783                 tbl = pritbl;
 784                 if (sectbl != NULL)
 785                         g_free(sectbl);
 786         }
 787
 788         basetable->gpt_first = table->hdr->hdr_lba_start;
 789         basetable->gpt_last = table->hdr->hdr_lba_end;
 790         basetable->gpt_entries = table->hdr->hdr_entries;
 791
 792         for (index = basetable->gpt_entries - 1; index >= 0; index--) {
 793                 if (EQUUID(&tbl[index].ent_type, &gpt_uuid_unused))
 794                         continue;
 795                 entry = (struct g_part_gpt_entry *)g_part_new_entry(
 796                     basetable, index + 1, tbl[index].ent_lba_start,
 797                     tbl[index].ent_lba_end);
 798                 entry->ent = tbl[index];
 799         }
 800
 801         g_free(tbl);
 802         return (0);
 803 }
 804
 805 static int
 806 g_part_gpt_recover(struct g_part_table *basetable)
 807 {
 808
 809         g_gpt_set_defaults(basetable,
 810             LIST_FIRST(&basetable->gpt_gp->consumer)->provider);
 811         basetable->gpt_corrupt = 0;
 812         return (0);
 813 }
 814
 815 static int
 816 g_part_gpt_setunset(struct g_part_table *table, struct g_part_entry *baseentry,
 817     const char *attrib, unsigned int set)
 818 {
 819         struct g_part_entry *iter;
 820         struct g_part_gpt_entry *entry;
 821         int changed, bootme, bootonce, bootfailed;
 822
 823         bootme = bootonce = bootfailed = 0;
 824         if (strcasecmp(attrib, "bootme") == 0) {
 825                 bootme = 1;
 826         } else if (strcasecmp(attrib, "bootonce") == 0) {
 827                 /* BOOTME is set automatically with BOOTONCE, but not unset. */
 828                 bootonce = 1;
 829                 if (set)
 830                         bootme = 1;
 831         } else if (strcasecmp(attrib, "bootfailed") == 0) {
 832                 /*
 833                  * It should only be possible to unset BOOTFAILED, but it might
 834                  * be useful for test purposes to also be able to set it.
 835                  */
 836                 bootfailed = 1;
 837         }
 838         if (!bootme && !bootonce && !bootfailed)
 839                 return (EINVAL);
 840
 841         LIST_FOREACH(iter, &table->gpt_entry, gpe_entry) {
 842                 if (iter->gpe_deleted)
 843                         continue;
 844                 if (iter != baseentry)
 845                         continue;
 846                 changed = 0;
 847                 entry = (struct g_part_gpt_entry *)iter;
 848                 if (set) {
 849                         if (bootme &&
 850                             !(entry->ent.ent_attr & GPT_ENT_ATTR_BOOTME)) {
 851                                 entry->ent.ent_attr |= GPT_ENT_ATTR_BOOTME;
 852                                 changed = 1;
 853                         }
 854                         if (bootonce &&
 855                             !(entry->ent.ent_attr & GPT_ENT_ATTR_BOOTONCE)) {
 856                                 entry->ent.ent_attr |= GPT_ENT_ATTR_BOOTONCE;
 857                                 changed = 1;
 858                         }
 859                         if (bootfailed &&
 860                             !(entry->ent.ent_attr & GPT_ENT_ATTR_BOOTFAILED)) {
 861                                 entry->ent.ent_attr |= GPT_ENT_ATTR_BOOTFAILED;
 862                                 changed = 1;
 863                         }
 864                 } else {
 865                         if (bootme &&
 866                             (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTME)) {
 867                                 entry->ent.ent_attr &= ~GPT_ENT_ATTR_BOOTME;
 868                                 changed = 1;
 869                         }
 870                         if (bootonce &&
 871                             (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTONCE)) {
 872                                 entry->ent.ent_attr &= ~GPT_ENT_ATTR_BOOTONCE;
 873                                 changed = 1;
 874                         }
 875                         if (bootfailed &&
 876                             (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTFAILED)) {
 877                                 entry->ent.ent_attr &= ~GPT_ENT_ATTR_BOOTFAILED;
 878                                 changed = 1;
 879                         }
 880                 }
 881                 if (changed && !iter->gpe_created)
 882                         iter->gpe_modified = 1;
 883         }
 884         return (0);
 885 }
 886
 887 static const char *
 888 g_part_gpt_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
 889     char *buf, size_t bufsz)
 890 {
 891         struct g_part_gpt_entry *entry;
 892         struct uuid *type;
 893         struct g_part_uuid_alias *uap;
 894
 895         entry = (struct g_part_gpt_entry *)baseentry;
 896         type = &entry->ent.ent_type;
 897         for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++)
 898                 if (EQUUID(type, uap->uuid))
 899                         return (g_part_alias_name(uap->alias));
 900         buf[0] = '!';
 901         snprintf_uuid(buf + 1, bufsz - 1, type);
 902
 903         return (buf);
 904 }
 905
 906 static int
 907 g_part_gpt_write(struct g_part_table *basetable, struct g_consumer *cp)
 908 {
 909         unsigned char *buf, *bp;
 910         struct g_provider *pp;
 911         struct g_part_entry *baseentry;
 912         struct g_part_gpt_entry *entry;
 913         struct g_part_gpt_table *table;
 914         size_t tblsz;
 915         uint32_t crc;
 916         int error, index;
 917
 918         pp = cp->provider;
 919         table = (struct g_part_gpt_table *)basetable;
 920         tblsz = (table->hdr->hdr_entries * table->hdr->hdr_entsz +
 921             pp->sectorsize - 1) / pp->sectorsize;
 922
 923         /* Write the PMBR */
 924         buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO);
 925         bcopy(table->mbr, buf, MBRSIZE);
 926         error = g_write_data(cp, 0, buf, pp->sectorsize);
 927         g_free(buf);
 928         if (error)
 929                 return (error);
 930
 931         /* Allocate space for the header and entries. */
 932         buf = g_malloc((tblsz + 1) * pp->sectorsize, M_WAITOK | M_ZERO);
 933
 934         memcpy(buf, table->hdr->hdr_sig, sizeof(table->hdr->hdr_sig));
 935         le32enc(buf + 8, table->hdr->hdr_revision);
 936         le32enc(buf + 12, table->hdr->hdr_size);
 937         le64enc(buf + 40, table->hdr->hdr_lba_start);
 938         le64enc(buf + 48, table->hdr->hdr_lba_end);
 939         le_uuid_enc(buf + 56, &table->hdr->hdr_uuid);
 940         le32enc(buf + 80, table->hdr->hdr_entries);
 941         le32enc(buf + 84, table->hdr->hdr_entsz);
 942
 943         LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) {
 944                 if (baseentry->gpe_deleted)
 945                         continue;
 946                 entry = (struct g_part_gpt_entry *)baseentry;
 947                 index = baseentry->gpe_index - 1;
 948                 bp = buf + pp->sectorsize + table->hdr->hdr_entsz * index;
 949                 le_uuid_enc(bp, &entry->ent.ent_type);
 950                 le_uuid_enc(bp + 16, &entry->ent.ent_uuid);
 951                 le64enc(bp + 32, entry->ent.ent_lba_start);
 952                 le64enc(bp + 40, entry->ent.ent_lba_end);
 953                 le64enc(bp + 48, entry->ent.ent_attr);
 954                 memcpy(bp + 56, entry->ent.ent_name,
 955                     sizeof(entry->ent.ent_name));
 956         }
 957
 958         crc = crc32(buf + pp->sectorsize,
 959             table->hdr->hdr_entries * table->hdr->hdr_entsz);
 960         le32enc(buf + 88, crc);
 961
 962         /* Write primary meta-data. */
 963         le32enc(buf + 16, 0);   /* hdr_crc_self. */
 964         le64enc(buf + 24, table->lba[GPT_ELT_PRIHDR]);  /* hdr_lba_self. */
 965         le64enc(buf + 32, table->lba[GPT_ELT_SECHDR]);  /* hdr_lba_alt. */
 966         le64enc(buf + 72, table->lba[GPT_ELT_PRITBL]);  /* hdr_lba_table. */
 967         crc = crc32(buf, table->hdr->hdr_size);
 968         le32enc(buf + 16, crc);
 969
 970         for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) {
 971                 error = g_write_data(cp,
 972                     (table->lba[GPT_ELT_PRITBL] + index) * pp->sectorsize,
 973                     buf + (index + 1) * pp->sectorsize,
 974                     (tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS:
 975                     (tblsz - index) * pp->sectorsize);
 976                 if (error)
 977                         goto out;
 978         }
 979         error = g_write_data(cp, table->lba[GPT_ELT_PRIHDR] * pp->sectorsize,
 980             buf, pp->sectorsize);
 981         if (error)
 982                 goto out;
 983
 984         /* Write secondary meta-data. */
 985         le32enc(buf + 16, 0);   /* hdr_crc_self. */
 986         le64enc(buf + 24, table->lba[GPT_ELT_SECHDR]);  /* hdr_lba_self. */
 987         le64enc(buf + 32, table->lba[GPT_ELT_PRIHDR]);  /* hdr_lba_alt. */
 988         le64enc(buf + 72, table->lba[GPT_ELT_SECTBL]);  /* hdr_lba_table. */
 989         crc = crc32(buf, table->hdr->hdr_size);
 990         le32enc(buf + 16, crc);
 991
 992         for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) {
 993                 error = g_write_data(cp,
 994                     (table->lba[GPT_ELT_SECTBL] + index) * pp->sectorsize,
 995                     buf + (index + 1) * pp->sectorsize,
 996                     (tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS:
 997                     (tblsz - index) * pp->sectorsize);
 998                 if (error)
 999                         goto out;
1000         }
1001         error = g_write_data(cp, table->lba[GPT_ELT_SECHDR] * pp->sectorsize,
1002             buf, pp->sectorsize);
1003
1004  out:
1005         g_free(buf);
1006         return (error);
1007 }
1008
1009 static void
1010 g_gpt_set_defaults(struct g_part_table *basetable, struct g_provider *pp)
1011 {
1012         struct g_part_gpt_table *table;
1013         quad_t last;
1014         size_t tblsz;
1015
1016         table = (struct g_part_gpt_table *)basetable;
1017         last = pp->mediasize / pp->sectorsize - 1;
1018         tblsz = (basetable->gpt_entries * sizeof(struct gpt_ent) +
1019             pp->sectorsize - 1) / pp->sectorsize;
1020
1021         table->lba[GPT_ELT_PRIHDR] = 1;
1022         table->lba[GPT_ELT_PRITBL] = 2;
1023         table->lba[GPT_ELT_SECHDR] = last;
1024         table->lba[GPT_ELT_SECTBL] = last - tblsz;
1025         table->state[GPT_ELT_PRIHDR] = GPT_STATE_OK;
1026         table->state[GPT_ELT_PRITBL] = GPT_STATE_OK;
1027         table->state[GPT_ELT_SECHDR] = GPT_STATE_OK;
1028         table->state[GPT_ELT_SECTBL] = GPT_STATE_OK;
1029
1030         table->hdr->hdr_lba_start = 2 + tblsz;
1031         table->hdr->hdr_lba_end = last - tblsz - 1;
1032
1033         basetable->gpt_first = table->hdr->hdr_lba_start;
1034         basetable->gpt_last = table->hdr->hdr_lba_end;
1035 }
1036
1037 static void
1038 g_gpt_printf_utf16(struct sbuf *sb, uint16_t *str, size_t len)
1039 {
1040         u_int bo;
1041         uint32_t ch;
1042         uint16_t c;
1043
1044         bo = LITTLE_ENDIAN;     /* GPT is little-endian */
1045         while (len > 0 && *str != 0) {
1046                 ch = (bo == BIG_ENDIAN) ? be16toh(*str) : le16toh(*str);
1047                 str++, len--;
1048                 if ((ch & 0xf800) == 0xd800) {
1049                         if (len > 0) {
1050                                 c = (bo == BIG_ENDIAN) ? be16toh(*str)
1051                                     : le16toh(*str);
1052                                 str++, len--;
1053                         } else
1054                                 c = 0xfffd;
1055                         if ((ch & 0x400) == 0 && (c & 0xfc00) == 0xdc00) {
1056                                 ch = ((ch & 0x3ff) << 10) + (c & 0x3ff);
1057                                 ch += 0x10000;
1058                         } else
1059                                 ch = 0xfffd;
1060                 } else if (ch == 0xfffe) { /* BOM (U+FEFF) swapped. */
1061                         bo = (bo == BIG_ENDIAN) ? LITTLE_ENDIAN : BIG_ENDIAN;
1062                         continue;
1063                 } else if (ch == 0xfeff) /* BOM (U+FEFF) unswapped. */
1064                         continue;
1065
1066                 /* Write the Unicode character in UTF-8 */
1067                 if (ch < 0x80)
1068                         sbuf_printf(sb, "%c", ch);
1069                 else if (ch < 0x800)
1070                         sbuf_printf(sb, "%c%c", 0xc0 | (ch >> 6),
1071                             0x80 | (ch & 0x3f));
1072                 else if (ch < 0x10000)
1073                         sbuf_printf(sb, "%c%c%c", 0xe0 | (ch >> 12),
1074                             0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
1075                 else if (ch < 0x200000)
1076                         sbuf_printf(sb, "%c%c%c%c", 0xf0 | (ch >> 18),
1077                             0x80 | ((ch >> 12) & 0x3f),
1078                             0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
1079         }
1080 }
1081
1082 static void
1083 g_gpt_utf8_to_utf16(const uint8_t *s8, uint16_t *s16, size_t s16len)
1084 {
1085         size_t s16idx, s8idx;
1086         uint32_t utfchar;
1087         unsigned int c, utfbytes;
1088
1089         s8idx = s16idx = 0;
1090         utfchar = 0;
1091         utfbytes = 0;
1092         bzero(s16, s16len << 1);
1093         while (s8[s8idx] != 0 && s16idx < s16len) {
1094                 c = s8[s8idx++];
1095                 if ((c & 0xc0) != 0x80) {
1096                         /* Initial characters. */
1097                         if (utfbytes != 0) {
1098                                 /* Incomplete encoding of previous char. */
1099                                 s16[s16idx++] = htole16(0xfffd);
1100                         }
1101                         if ((c & 0xf8) == 0xf0) {
1102                                 utfchar = c & 0x07;
1103                                 utfbytes = 3;
1104                         } else if ((c & 0xf0) == 0xe0) {
1105                                 utfchar = c & 0x0f;
1106                                 utfbytes = 2;
1107                         } else if ((c & 0xe0) == 0xc0) {
1108                                 utfchar = c & 0x1f;
1109                                 utfbytes = 1;
1110                         } else {
1111                                 utfchar = c & 0x7f;
1112                                 utfbytes = 0;
1113                         }
1114                 } else {
1115                         /* Followup characters. */
1116                         if (utfbytes > 0) {
1117                                 utfchar = (utfchar << 6) + (c & 0x3f);
1118                                 utfbytes--;
1119                         } else if (utfbytes == 0)
1120                                 utfbytes = ~0;
1121                 }
1122                 /*
1123                  * Write the complete Unicode character as UTF-16 when we
1124                  * have all the UTF-8 charactars collected.
1125                  */
1126                 if (utfbytes == 0) {
1127                         /*
1128                          * If we need to write 2 UTF-16 characters, but
1129                          * we only have room for 1, then we truncate the
1130                          * string by writing a 0 instead.
1131                          */
1132                         if (utfchar >= 0x10000 && s16idx < s16len - 1) {
1133                                 s16[s16idx++] =
1134                                     htole16(0xd800 | ((utfchar >> 10) - 0x40));
1135                                 s16[s16idx++] =
1136                                     htole16(0xdc00 | (utfchar & 0x3ff));
1137                         } else
1138                                 s16[s16idx++] = (utfchar >= 0x10000) ? 0 :
1139                                     htole16(utfchar);
1140                 }
1141         }
1142         /*
1143          * If our input string was truncated, append an invalid encoding
1144          * character to the output string.
1145          */
1146         if (utfbytes != 0 && s16idx < s16len)
1147                 s16[s16idx++] = htole16(0xfffd);
1148 }