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_vmfs = GPT_ENT_TYPE_VMFS;
 163 static struct uuid gpt_uuid_vmkdiag = GPT_ENT_TYPE_VMKDIAG;
 164 static struct uuid gpt_uuid_vmreserved = GPT_ENT_TYPE_VMRESERVED;
 165 static struct uuid gpt_uuid_vmvsanhdr = GPT_ENT_TYPE_VMVSANHDR;
 166 static struct uuid gpt_uuid_ms_basic_data = GPT_ENT_TYPE_MS_BASIC_DATA;
 167 static struct uuid gpt_uuid_ms_reserved = GPT_ENT_TYPE_MS_RESERVED;
 168 static struct uuid gpt_uuid_ms_ldm_data = GPT_ENT_TYPE_MS_LDM_DATA;
 169 static struct uuid gpt_uuid_ms_ldm_metadata = GPT_ENT_TYPE_MS_LDM_METADATA;
 170 static struct uuid gpt_uuid_netbsd_ccd = GPT_ENT_TYPE_NETBSD_CCD;
 171 static struct uuid gpt_uuid_netbsd_cgd = GPT_ENT_TYPE_NETBSD_CGD;
 172 static struct uuid gpt_uuid_netbsd_ffs = GPT_ENT_TYPE_NETBSD_FFS;
 173 static struct uuid gpt_uuid_netbsd_lfs = GPT_ENT_TYPE_NETBSD_LFS;
 174 static struct uuid gpt_uuid_netbsd_raid = GPT_ENT_TYPE_NETBSD_RAID;
 175 static struct uuid gpt_uuid_netbsd_swap = GPT_ENT_TYPE_NETBSD_SWAP;
 176 static struct uuid gpt_uuid_mbr = GPT_ENT_TYPE_MBR;
 177 static struct uuid gpt_uuid_unused = GPT_ENT_TYPE_UNUSED;
 178
 179 static struct g_part_uuid_alias {
 180         struct uuid *uuid;
 181         int alias;
 182 } gpt_uuid_alias_match[] = {
 183         { &gpt_uuid_apple_boot,         G_PART_ALIAS_APPLE_BOOT },
 184         { &gpt_uuid_apple_hfs,          G_PART_ALIAS_APPLE_HFS },
 185         { &gpt_uuid_apple_label,        G_PART_ALIAS_APPLE_LABEL },
 186         { &gpt_uuid_apple_raid,         G_PART_ALIAS_APPLE_RAID },
 187         { &gpt_uuid_apple_raid_offline, G_PART_ALIAS_APPLE_RAID_OFFLINE },
 188         { &gpt_uuid_apple_tv_recovery,  G_PART_ALIAS_APPLE_TV_RECOVERY },
 189         { &gpt_uuid_apple_ufs,          G_PART_ALIAS_APPLE_UFS },
 190         { &gpt_uuid_bios_boot,          G_PART_ALIAS_BIOS_BOOT },
 191         { &gpt_uuid_efi,                G_PART_ALIAS_EFI },
 192         { &gpt_uuid_freebsd,            G_PART_ALIAS_FREEBSD },
 193         { &gpt_uuid_freebsd_boot,       G_PART_ALIAS_FREEBSD_BOOT },
 194         { &gpt_uuid_freebsd_swap,       G_PART_ALIAS_FREEBSD_SWAP },
 195         { &gpt_uuid_freebsd_ufs,        G_PART_ALIAS_FREEBSD_UFS },
 196         { &gpt_uuid_freebsd_vinum,      G_PART_ALIAS_FREEBSD_VINUM },
 197         { &gpt_uuid_freebsd_zfs,        G_PART_ALIAS_FREEBSD_ZFS },
 198         { &gpt_uuid_linux_data,         G_PART_ALIAS_LINUX_DATA },
 199         { &gpt_uuid_linux_lvm,          G_PART_ALIAS_LINUX_LVM },
 200         { &gpt_uuid_linux_raid,         G_PART_ALIAS_LINUX_RAID },
 201         { &gpt_uuid_linux_swap,         G_PART_ALIAS_LINUX_SWAP },
 202         { &gpt_uuid_vmfs,               G_PART_ALIAS_VMFS },
 203         { &gpt_uuid_vmkdiag,            G_PART_ALIAS_VMKDIAG },
 204         { &gpt_uuid_vmreserved,         G_PART_ALIAS_VMRESERVED },
 205         { &gpt_uuid_vmvsanhdr,          G_PART_ALIAS_VMVSANHDR },
 206         { &gpt_uuid_mbr,                G_PART_ALIAS_MBR },
 207         { &gpt_uuid_ms_basic_data,      G_PART_ALIAS_MS_BASIC_DATA },
 208         { &gpt_uuid_ms_ldm_data,        G_PART_ALIAS_MS_LDM_DATA },
 209         { &gpt_uuid_ms_ldm_metadata,    G_PART_ALIAS_MS_LDM_METADATA },
 210         { &gpt_uuid_ms_reserved,        G_PART_ALIAS_MS_RESERVED },
 211         { &gpt_uuid_netbsd_ccd,         G_PART_ALIAS_NETBSD_CCD },
 212         { &gpt_uuid_netbsd_cgd,         G_PART_ALIAS_NETBSD_CGD },
 213         { &gpt_uuid_netbsd_ffs,         G_PART_ALIAS_NETBSD_FFS },
 214         { &gpt_uuid_netbsd_lfs,         G_PART_ALIAS_NETBSD_LFS },
 215         { &gpt_uuid_netbsd_raid,        G_PART_ALIAS_NETBSD_RAID },
 216         { &gpt_uuid_netbsd_swap,        G_PART_ALIAS_NETBSD_SWAP },
 217
 218         { NULL, 0 }
 219 };
 220
 221 static struct gpt_hdr *
 222 gpt_read_hdr(struct g_part_gpt_table *table, struct g_consumer *cp,
 223     enum gpt_elt elt)
 224 {
 225         struct gpt_hdr *buf, *hdr;
 226         struct g_provider *pp;
 227         quad_t lba, last;
 228         int error;
 229         uint32_t crc, sz;
 230
 231         pp = cp->provider;
 232         last = (pp->mediasize / pp->sectorsize) - 1;
 233         table->state[elt] = GPT_STATE_MISSING;
 234         /*
 235          * If the primary header is valid look for secondary
 236          * header in AlternateLBA, otherwise in the last medium's LBA.
 237          */
 238         if (elt == GPT_ELT_SECHDR) {
 239                 if (table->state[GPT_ELT_PRIHDR] != GPT_STATE_OK)
 240                         table->lba[elt] = last;
 241         } else
 242                 table->lba[elt] = 1;
 243         buf = g_read_data(cp, table->lba[elt] * pp->sectorsize, pp->sectorsize,
 244             &error);
 245         if (buf == NULL)
 246                 return (NULL);
 247         hdr = NULL;
 248         if (memcmp(buf->hdr_sig, GPT_HDR_SIG, sizeof(buf->hdr_sig)) != 0)
 249                 goto fail;
 250
 251         table->state[elt] = GPT_STATE_CORRUPT;
 252         sz = le32toh(buf->hdr_size);
 253         if (sz < 92 || sz > pp->sectorsize)
 254                 goto fail;
 255
 256         hdr = g_malloc(sz, M_WAITOK | M_ZERO);
 257         bcopy(buf, hdr, sz);
 258         hdr->hdr_size = sz;
 259
 260         crc = le32toh(buf->hdr_crc_self);
 261         buf->hdr_crc_self = 0;
 262         if (crc32(buf, sz) != crc)
 263                 goto fail;
 264         hdr->hdr_crc_self = crc;
 265
 266         table->state[elt] = GPT_STATE_INVALID;
 267         hdr->hdr_revision = le32toh(buf->hdr_revision);
 268         if (hdr->hdr_revision < GPT_HDR_REVISION)
 269                 goto fail;
 270         hdr->hdr_lba_self = le64toh(buf->hdr_lba_self);
 271         if (hdr->hdr_lba_self != table->lba[elt])
 272                 goto fail;
 273         hdr->hdr_lba_alt = le64toh(buf->hdr_lba_alt);
 274         if (hdr->hdr_lba_alt == hdr->hdr_lba_self ||
 275             hdr->hdr_lba_alt > last)
 276                 goto fail;
 277
 278         /* Check the managed area. */
 279         hdr->hdr_lba_start = le64toh(buf->hdr_lba_start);
 280         if (hdr->hdr_lba_start < 2 || hdr->hdr_lba_start >= last)
 281                 goto fail;
 282         hdr->hdr_lba_end = le64toh(buf->hdr_lba_end);
 283         if (hdr->hdr_lba_end < hdr->hdr_lba_start || hdr->hdr_lba_end >= last)
 284                 goto fail;
 285
 286         /* Check the table location and size of the table. */
 287         hdr->hdr_entries = le32toh(buf->hdr_entries);
 288         hdr->hdr_entsz = le32toh(buf->hdr_entsz);
 289         if (hdr->hdr_entries == 0 || hdr->hdr_entsz < 128 ||
 290             (hdr->hdr_entsz & 7) != 0)
 291                 goto fail;
 292         hdr->hdr_lba_table = le64toh(buf->hdr_lba_table);
 293         if (hdr->hdr_lba_table < 2 || hdr->hdr_lba_table >= last)
 294                 goto fail;
 295         if (hdr->hdr_lba_table >= hdr->hdr_lba_start &&
 296             hdr->hdr_lba_table <= hdr->hdr_lba_end)
 297                 goto fail;
 298         lba = hdr->hdr_lba_table +
 299             (hdr->hdr_entries * hdr->hdr_entsz + pp->sectorsize - 1) /
 300             pp->sectorsize - 1;
 301         if (lba >= last)
 302                 goto fail;
 303         if (lba >= hdr->hdr_lba_start && lba <= hdr->hdr_lba_end)
 304                 goto fail;
 305
 306         table->state[elt] = GPT_STATE_OK;
 307         le_uuid_dec(&buf->hdr_uuid, &hdr->hdr_uuid);
 308         hdr->hdr_crc_table = le32toh(buf->hdr_crc_table);
 309
 310         /* save LBA for secondary header */
 311         if (elt == GPT_ELT_PRIHDR)
 312                 table->lba[GPT_ELT_SECHDR] = hdr->hdr_lba_alt;
 313
 314         g_free(buf);
 315         return (hdr);
 316
 317  fail:
 318         if (hdr != NULL)
 319                 g_free(hdr);
 320         g_free(buf);
 321         return (NULL);
 322 }
 323
 324 static struct gpt_ent *
 325 gpt_read_tbl(struct g_part_gpt_table *table, struct g_consumer *cp,
 326     enum gpt_elt elt, struct gpt_hdr *hdr)
 327 {
 328         struct g_provider *pp;
 329         struct gpt_ent *ent, *tbl;
 330         char *buf, *p;
 331         unsigned int idx, sectors, tblsz, size;
 332         int error;
 333
 334         if (hdr == NULL)
 335                 return (NULL);
 336
 337         pp = cp->provider;
 338         table->lba[elt] = hdr->hdr_lba_table;
 339
 340         table->state[elt] = GPT_STATE_MISSING;
 341         tblsz = hdr->hdr_entries * hdr->hdr_entsz;
 342         sectors = (tblsz + pp->sectorsize - 1) / pp->sectorsize;
 343         buf = g_malloc(sectors * pp->sectorsize, M_WAITOK | M_ZERO);
 344         for (idx = 0; idx < sectors; idx += MAXPHYS / pp->sectorsize) {
 345                 size = (sectors - idx > MAXPHYS / pp->sectorsize) ?  MAXPHYS:
 346                     (sectors - idx) * pp->sectorsize;
 347                 p = g_read_data(cp, (table->lba[elt] + idx) * pp->sectorsize,
 348                     size, &error);
 349                 if (p == NULL) {
 350                         g_free(buf);
 351                         return (NULL);
 352                 }
 353                 bcopy(p, buf + idx * pp->sectorsize, size);
 354                 g_free(p);
 355         }
 356         table->state[elt] = GPT_STATE_CORRUPT;
 357         if (crc32(buf, tblsz) != hdr->hdr_crc_table) {
 358                 g_free(buf);
 359                 return (NULL);
 360         }
 361
 362         table->state[elt] = GPT_STATE_OK;
 363         tbl = g_malloc(hdr->hdr_entries * sizeof(struct gpt_ent),
 364             M_WAITOK | M_ZERO);
 365
 366         for (idx = 0, ent = tbl, p = buf;
 367              idx < hdr->hdr_entries;
 368              idx++, ent++, p += hdr->hdr_entsz) {
 369                 le_uuid_dec(p, &ent->ent_type);
 370                 le_uuid_dec(p + 16, &ent->ent_uuid);
 371                 ent->ent_lba_start = le64dec(p + 32);
 372                 ent->ent_lba_end = le64dec(p + 40);
 373                 ent->ent_attr = le64dec(p + 48);
 374                 /* Keep UTF-16 in little-endian. */
 375                 bcopy(p + 56, ent->ent_name, sizeof(ent->ent_name));
 376         }
 377
 378         g_free(buf);
 379         return (tbl);
 380 }
 381
 382 static int
 383 gpt_matched_hdrs(struct gpt_hdr *pri, struct gpt_hdr *sec)
 384 {
 385
 386         if (pri == NULL || sec == NULL)
 387                 return (0);
 388
 389         if (!EQUUID(&pri->hdr_uuid, &sec->hdr_uuid))
 390                 return (0);
 391         return ((pri->hdr_revision == sec->hdr_revision &&
 392             pri->hdr_size == sec->hdr_size &&
 393             pri->hdr_lba_start == sec->hdr_lba_start &&
 394             pri->hdr_lba_end == sec->hdr_lba_end &&
 395             pri->hdr_entries == sec->hdr_entries &&
 396             pri->hdr_entsz == sec->hdr_entsz &&
 397             pri->hdr_crc_table == sec->hdr_crc_table) ? 1 : 0);
 398 }
 399
 400 static int
 401 gpt_parse_type(const char *type, struct uuid *uuid)
 402 {
 403         struct uuid tmp;
 404         const char *alias;
 405         int error;
 406         struct g_part_uuid_alias *uap;
 407
 408         if (type[0] == '!') {
 409                 error = parse_uuid(type + 1, &tmp);
 410                 if (error)
 411                         return (error);
 412                 if (EQUUID(&tmp, &gpt_uuid_unused))
 413                         return (EINVAL);
 414                 *uuid = tmp;
 415                 return (0);
 416         }
 417         for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++) {
 418                 alias = g_part_alias_name(uap->alias);
 419                 if (!strcasecmp(type, alias)) {
 420                         *uuid = *uap->uuid;
 421                         return (0);
 422                 }
 423         }
 424         return (EINVAL);
 425 }
 426
 427 static int
 428 g_part_gpt_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
 429     struct g_part_parms *gpp)
 430 {
 431         struct g_part_gpt_entry *entry;
 432         int error;
 433
 434         entry = (struct g_part_gpt_entry *)baseentry;
 435         error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type);
 436         if (error)
 437                 return (error);
 438         kern_uuidgen(&entry->ent.ent_uuid, 1);
 439         entry->ent.ent_lba_start = baseentry->gpe_start;
 440         entry->ent.ent_lba_end = baseentry->gpe_end;
 441         if (baseentry->gpe_deleted) {
 442                 entry->ent.ent_attr = 0;
 443                 bzero(entry->ent.ent_name, sizeof(entry->ent.ent_name));
 444         }
 445         if (gpp->gpp_parms & G_PART_PARM_LABEL)
 446                 g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name,
 447                     sizeof(entry->ent.ent_name) /
 448                     sizeof(entry->ent.ent_name[0]));
 449         return (0);
 450 }
 451
 452 static int
 453 g_part_gpt_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp)
 454 {
 455         struct g_part_gpt_table *table;
 456         size_t codesz;
 457
 458         codesz = DOSPARTOFF;
 459         table = (struct g_part_gpt_table *)basetable;
 460         bzero(table->mbr, codesz);
 461         codesz = MIN(codesz, gpp->gpp_codesize);
 462         if (codesz > 0)
 463                 bcopy(gpp->gpp_codeptr, table->mbr, codesz);
 464
 465         /* Mark the PMBR active since some BIOS require it */
 466         table->mbr[DOSPARTOFF] = 0x80;          /* status */
 467         return (0);
 468 }
 469
 470 static int
 471 g_part_gpt_create(struct g_part_table *basetable, struct g_part_parms *gpp)
 472 {
 473         struct g_provider *pp;
 474         struct g_part_gpt_table *table;
 475         quad_t last;
 476         size_t tblsz;
 477
 478         /* We don't nest, which means that our depth should be 0. */
 479         if (basetable->gpt_depth != 0)
 480                 return (ENXIO);
 481
 482         table = (struct g_part_gpt_table *)basetable;
 483         pp = gpp->gpp_provider;
 484         tblsz = (basetable->gpt_entries * sizeof(struct gpt_ent) +
 485             pp->sectorsize - 1) / pp->sectorsize;
 486         if (pp->sectorsize < MBRSIZE ||
 487             pp->mediasize < (3 + 2 * tblsz + basetable->gpt_entries) *
 488             pp->sectorsize)
 489                 return (ENOSPC);
 490
 491         last = (pp->mediasize / pp->sectorsize) - 1;
 492
 493         le16enc(table->mbr + DOSMAGICOFFSET, DOSMAGIC);
 494         table->mbr[DOSPARTOFF + 1] = 0x01;              /* shd */
 495         table->mbr[DOSPARTOFF + 2] = 0x01;              /* ssect */
 496         table->mbr[DOSPARTOFF + 3] = 0x00;              /* scyl */
 497         table->mbr[DOSPARTOFF + 4] = 0xee;              /* typ */
 498         table->mbr[DOSPARTOFF + 5] = 0xff;              /* ehd */
 499         table->mbr[DOSPARTOFF + 6] = 0xff;              /* esect */
 500         table->mbr[DOSPARTOFF + 7] = 0xff;              /* ecyl */
 501         le32enc(table->mbr + DOSPARTOFF + 8, 1);        /* start */
 502         le32enc(table->mbr + DOSPARTOFF + 12, MIN(last, UINT32_MAX));
 503
 504         /* Allocate space for the header */
 505         table->hdr = g_malloc(sizeof(struct gpt_hdr), M_WAITOK | M_ZERO);
 506
 507         bcopy(GPT_HDR_SIG, table->hdr->hdr_sig, sizeof(table->hdr->hdr_sig));
 508         table->hdr->hdr_revision = GPT_HDR_REVISION;
 509         table->hdr->hdr_size = offsetof(struct gpt_hdr, padding);
 510         kern_uuidgen(&table->hdr->hdr_uuid, 1);
 511         table->hdr->hdr_entries = basetable->gpt_entries;
 512         table->hdr->hdr_entsz = sizeof(struct gpt_ent);
 513
 514         g_gpt_set_defaults(basetable, pp);
 515         return (0);
 516 }
 517
 518 static int
 519 g_part_gpt_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
 520 {
 521         struct g_part_gpt_table *table;
 522         struct g_provider *pp;
 523
 524         table = (struct g_part_gpt_table *)basetable;
 525         pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider;
 526         g_free(table->hdr);
 527         table->hdr = NULL;
 528
 529         /*
 530          * Wipe the first 2 sectors to clear the partitioning. Wipe the last
 531          * sector only if it has valid secondary header.
 532          */
 533         basetable->gpt_smhead |= 3;
 534         if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK &&
 535             table->lba[GPT_ELT_SECHDR] == pp->mediasize / pp->sectorsize - 1)
 536                 basetable->gpt_smtail |= 1;
 537         return (0);
 538 }
 539
 540 static void
 541 g_part_gpt_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry,
 542     struct sbuf *sb, const char *indent)
 543 {
 544         struct g_part_gpt_entry *entry;
 545
 546         entry = (struct g_part_gpt_entry *)baseentry;
 547         if (indent == NULL) {
 548                 /* conftxt: libdisk compatibility */
 549                 sbuf_printf(sb, " xs GPT xt ");
 550                 sbuf_printf_uuid(sb, &entry->ent.ent_type);
 551         } else if (entry != NULL) {
 552                 /* confxml: partition entry information */
 553                 sbuf_printf(sb, "%s<label>", indent);
 554                 g_gpt_printf_utf16(sb, entry->ent.ent_name,
 555                     sizeof(entry->ent.ent_name) >> 1);
 556                 sbuf_printf(sb, "</label>\n");
 557                 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTME)
 558                         sbuf_printf(sb, "%s<attrib>bootme</attrib>\n", indent);
 559                 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTONCE) {
 560                         sbuf_printf(sb, "%s<attrib>bootonce</attrib>\n",
 561                             indent);
 562                 }
 563                 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTFAILED) {
 564                         sbuf_printf(sb, "%s<attrib>bootfailed</attrib>\n",
 565                             indent);
 566                 }
 567                 sbuf_printf(sb, "%s<rawtype>", indent);
 568                 sbuf_printf_uuid(sb, &entry->ent.ent_type);
 569                 sbuf_printf(sb, "</rawtype>\n");
 570                 sbuf_printf(sb, "%s<rawuuid>", indent);
 571                 sbuf_printf_uuid(sb, &entry->ent.ent_uuid);
 572                 sbuf_printf(sb, "</rawuuid>\n");
 573         } else {
 574                 /* confxml: scheme information */
 575         }
 576 }
 577
 578 static int
 579 g_part_gpt_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
 580 {
 581         struct g_part_gpt_entry *entry;
 582
 583         entry = (struct g_part_gpt_entry *)baseentry;
 584         return ((EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd_swap) ||
 585             EQUUID(&entry->ent.ent_type, &gpt_uuid_linux_swap)) ? 1 : 0);
 586 }
 587
 588 static int
 589 g_part_gpt_modify(struct g_part_table *basetable,
 590     struct g_part_entry *baseentry, struct g_part_parms *gpp)
 591 {
 592         struct g_part_gpt_entry *entry;
 593         int error;
 594
 595         entry = (struct g_part_gpt_entry *)baseentry;
 596         if (gpp->gpp_parms & G_PART_PARM_TYPE) {
 597                 error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type);
 598                 if (error)
 599                         return (error);
 600         }
 601         if (gpp->gpp_parms & G_PART_PARM_LABEL)
 602                 g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name,
 603                     sizeof(entry->ent.ent_name) /
 604                     sizeof(entry->ent.ent_name[0]));
 605         return (0);
 606 }
 607
 608 static int
 609 g_part_gpt_resize(struct g_part_table *basetable,
 610     struct g_part_entry *baseentry, struct g_part_parms *gpp)
 611 {
 612         struct g_part_gpt_entry *entry;
 613         entry = (struct g_part_gpt_entry *)baseentry;
 614
 615         baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1;
 616         entry->ent.ent_lba_end = baseentry->gpe_end;
 617
 618         return (0);
 619 }
 620
 621 static const char *
 622 g_part_gpt_name(struct g_part_table *table, struct g_part_entry *baseentry,
 623     char *buf, size_t bufsz)
 624 {
 625         struct g_part_gpt_entry *entry;
 626         char c;
 627
 628         entry = (struct g_part_gpt_entry *)baseentry;
 629         c = (EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd)) ? 's' : 'p';
 630         snprintf(buf, bufsz, "%c%d", c, baseentry->gpe_index);
 631         return (buf);
 632 }
 633
 634 static int
 635 g_part_gpt_probe(struct g_part_table *table, struct g_consumer *cp)
 636 {
 637         struct g_provider *pp;
 638         char *buf;
 639         int error, res;
 640
 641         /* We don't nest, which means that our depth should be 0. */
 642         if (table->gpt_depth != 0)
 643                 return (ENXIO);
 644
 645         pp = cp->provider;
 646
 647         /*
 648          * Sanity-check the provider. Since the first sector on the provider
 649          * must be a PMBR and a PMBR is 512 bytes large, the sector size
 650          * must be at least 512 bytes.  Also, since the theoretical minimum
 651          * number of sectors needed by GPT is 6, any medium that has less
 652          * than 6 sectors is never going to be able to hold a GPT. The
 653          * number 6 comes from:
 654          *      1 sector for the PMBR
 655          *      2 sectors for the GPT headers (each 1 sector)
 656          *      2 sectors for the GPT tables (each 1 sector)
 657          *      1 sector for an actual partition
 658          * It's better to catch this pathological case early than behaving
 659          * pathologically later on...
 660          */
 661         if (pp->sectorsize < MBRSIZE || pp->mediasize < 6 * pp->sectorsize)
 662                 return (ENOSPC);
 663
 664         /* Check that there's a MBR. */
 665         buf = g_read_data(cp, 0L, pp->sectorsize, &error);
 666         if (buf == NULL)
 667                 return (error);
 668         res = le16dec(buf + DOSMAGICOFFSET);
 669         g_free(buf);
 670         if (res != DOSMAGIC)
 671                 return (ENXIO);
 672
 673         /* Check that there's a primary header. */
 674         buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error);
 675         if (buf == NULL)
 676                 return (error);
 677         res = memcmp(buf, GPT_HDR_SIG, 8);
 678         g_free(buf);
 679         if (res == 0)
 680                 return (G_PART_PROBE_PRI_HIGH);
 681
 682         /* No primary? Check that there's a secondary. */
 683         buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize,
 684             &error);
 685         if (buf == NULL)
 686                 return (error);
 687         res = memcmp(buf, GPT_HDR_SIG, 8);
 688         g_free(buf);
 689         return ((res == 0) ? G_PART_PROBE_PRI_HIGH : ENXIO);
 690 }
 691
 692 static int
 693 g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp)
 694 {
 695         struct gpt_hdr *prihdr, *sechdr;
 696         struct gpt_ent *tbl, *pritbl, *sectbl;
 697         struct g_provider *pp;
 698         struct g_part_gpt_table *table;
 699         struct g_part_gpt_entry *entry;
 700         u_char *buf;
 701         uint64_t last;
 702         int error, index;
 703
 704         table = (struct g_part_gpt_table *)basetable;
 705         pp = cp->provider;
 706         last = (pp->mediasize / pp->sectorsize) - 1;
 707
 708         /* Read the PMBR */
 709         buf = g_read_data(cp, 0, pp->sectorsize, &error);
 710         if (buf == NULL)
 711                 return (error);
 712         bcopy(buf, table->mbr, MBRSIZE);
 713         g_free(buf);
 714
 715         /* Read the primary header and table. */
 716         prihdr = gpt_read_hdr(table, cp, GPT_ELT_PRIHDR);
 717         if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK) {
 718                 pritbl = gpt_read_tbl(table, cp, GPT_ELT_PRITBL, prihdr);
 719         } else {
 720                 table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING;
 721                 pritbl = NULL;
 722         }
 723
 724         /* Read the secondary header and table. */
 725         sechdr = gpt_read_hdr(table, cp, GPT_ELT_SECHDR);
 726         if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK) {
 727                 sectbl = gpt_read_tbl(table, cp, GPT_ELT_SECTBL, sechdr);
 728         } else {
 729                 table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING;
 730                 sectbl = NULL;
 731         }
 732
 733         /* Fail if we haven't got any good tables at all. */
 734         if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK &&
 735             table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) {
 736                 printf("GEOM: %s: corrupt or invalid GPT detected.\n",
 737                     pp->name);
 738                 printf("GEOM: %s: GPT rejected -- may not be recoverable.\n",
 739                     pp->name);
 740                 return (EINVAL);
 741         }
 742
 743         /*
 744          * If both headers are good but they disagree with each other,
 745          * then invalidate one. We prefer to keep the primary header,
 746          * unless the primary table is corrupt.
 747          */
 748         if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK &&
 749             table->state[GPT_ELT_SECHDR] == GPT_STATE_OK &&
 750             !gpt_matched_hdrs(prihdr, sechdr)) {
 751                 if (table->state[GPT_ELT_PRITBL] == GPT_STATE_OK) {
 752                         table->state[GPT_ELT_SECHDR] = GPT_STATE_INVALID;
 753                         table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING;
 754                         g_free(sechdr);
 755                         sechdr = NULL;
 756                 } else {
 757                         table->state[GPT_ELT_PRIHDR] = GPT_STATE_INVALID;
 758                         table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING;
 759                         g_free(prihdr);
 760                         prihdr = NULL;
 761                 }
 762         }
 763
 764         if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK) {
 765                 printf("GEOM: %s: the primary GPT table is corrupt or "
 766                     "invalid.\n", pp->name);
 767                 printf("GEOM: %s: using the secondary instead -- recovery "
 768                     "strongly advised.\n", pp->name);
 769                 table->hdr = sechdr;
 770                 basetable->gpt_corrupt = 1;
 771                 if (prihdr != NULL)
 772                         g_free(prihdr);
 773                 tbl = sectbl;
 774                 if (pritbl != NULL)
 775                         g_free(pritbl);
 776         } else {
 777                 if (table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) {
 778                         printf("GEOM: %s: the secondary GPT table is corrupt "
 779                             "or invalid.\n", pp->name);
 780                         printf("GEOM: %s: using the primary only -- recovery "
 781                             "suggested.\n", pp->name);
 782                         basetable->gpt_corrupt = 1;
 783                 } else if (table->lba[GPT_ELT_SECHDR] != last) {
 784                         printf( "GEOM: %s: the secondary GPT header is not in "
 785                             "the last LBA.\n", pp->name);
 786                         basetable->gpt_corrupt = 1;
 787                 }
 788                 table->hdr = prihdr;
 789                 if (sechdr != NULL)
 790                         g_free(sechdr);
 791                 tbl = pritbl;
 792                 if (sectbl != NULL)
 793                         g_free(sectbl);
 794         }
 795
 796         basetable->gpt_first = table->hdr->hdr_lba_start;
 797         basetable->gpt_last = table->hdr->hdr_lba_end;
 798         basetable->gpt_entries = (table->hdr->hdr_lba_start - 2) *
 799             pp->sectorsize / table->hdr->hdr_entsz;
 800
 801         for (index = table->hdr->hdr_entries - 1; index >= 0; index--) {
 802                 if (EQUUID(&tbl[index].ent_type, &gpt_uuid_unused))
 803                         continue;
 804                 entry = (struct g_part_gpt_entry *)g_part_new_entry(
 805                     basetable, index + 1, tbl[index].ent_lba_start,
 806                     tbl[index].ent_lba_end);
 807                 entry->ent = tbl[index];
 808         }
 809
 810         g_free(tbl);
 811         return (0);
 812 }
 813
 814 static int
 815 g_part_gpt_recover(struct g_part_table *basetable)
 816 {
 817
 818         g_gpt_set_defaults(basetable,
 819             LIST_FIRST(&basetable->gpt_gp->consumer)->provider);
 820         basetable->gpt_corrupt = 0;
 821         return (0);
 822 }
 823
 824 static int
 825 g_part_gpt_setunset(struct g_part_table *table, struct g_part_entry *baseentry,
 826     const char *attrib, unsigned int set)
 827 {
 828         struct g_part_entry *iter;
 829         struct g_part_gpt_entry *entry;
 830         int changed, bootme, bootonce, bootfailed;
 831
 832         bootme = bootonce = bootfailed = 0;
 833         if (strcasecmp(attrib, "bootme") == 0) {
 834                 bootme = 1;
 835         } else if (strcasecmp(attrib, "bootonce") == 0) {
 836                 /* BOOTME is set automatically with BOOTONCE, but not unset. */
 837                 bootonce = 1;
 838                 if (set)
 839                         bootme = 1;
 840         } else if (strcasecmp(attrib, "bootfailed") == 0) {
 841                 /*
 842                  * It should only be possible to unset BOOTFAILED, but it might
 843                  * be useful for test purposes to also be able to set it.
 844                  */
 845                 bootfailed = 1;
 846         }
 847         if (!bootme && !bootonce && !bootfailed)
 848                 return (EINVAL);
 849
 850         LIST_FOREACH(iter, &table->gpt_entry, gpe_entry) {
 851                 if (iter->gpe_deleted)
 852                         continue;
 853                 if (iter != baseentry)
 854                         continue;
 855                 changed = 0;
 856                 entry = (struct g_part_gpt_entry *)iter;
 857                 if (set) {
 858                         if (bootme &&
 859                             !(entry->ent.ent_attr & GPT_ENT_ATTR_BOOTME)) {
 860                                 entry->ent.ent_attr |= GPT_ENT_ATTR_BOOTME;
 861                                 changed = 1;
 862                         }
 863                         if (bootonce &&
 864                             !(entry->ent.ent_attr & GPT_ENT_ATTR_BOOTONCE)) {
 865                                 entry->ent.ent_attr |= GPT_ENT_ATTR_BOOTONCE;
 866                                 changed = 1;
 867                         }
 868                         if (bootfailed &&
 869                             !(entry->ent.ent_attr & GPT_ENT_ATTR_BOOTFAILED)) {
 870                                 entry->ent.ent_attr |= GPT_ENT_ATTR_BOOTFAILED;
 871                                 changed = 1;
 872                         }
 873                 } else {
 874                         if (bootme &&
 875                             (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTME)) {
 876                                 entry->ent.ent_attr &= ~GPT_ENT_ATTR_BOOTME;
 877                                 changed = 1;
 878                         }
 879                         if (bootonce &&
 880                             (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTONCE)) {
 881                                 entry->ent.ent_attr &= ~GPT_ENT_ATTR_BOOTONCE;
 882                                 changed = 1;
 883                         }
 884                         if (bootfailed &&
 885                             (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTFAILED)) {
 886                                 entry->ent.ent_attr &= ~GPT_ENT_ATTR_BOOTFAILED;
 887                                 changed = 1;
 888                         }
 889                 }
 890                 if (changed && !iter->gpe_created)
 891                         iter->gpe_modified = 1;
 892         }
 893         return (0);
 894 }
 895
 896 static const char *
 897 g_part_gpt_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
 898     char *buf, size_t bufsz)
 899 {
 900         struct g_part_gpt_entry *entry;
 901         struct uuid *type;
 902         struct g_part_uuid_alias *uap;
 903
 904         entry = (struct g_part_gpt_entry *)baseentry;
 905         type = &entry->ent.ent_type;
 906         for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++)
 907                 if (EQUUID(type, uap->uuid))
 908                         return (g_part_alias_name(uap->alias));
 909         buf[0] = '!';
 910         snprintf_uuid(buf + 1, bufsz - 1, type);
 911
 912         return (buf);
 913 }
 914
 915 static int
 916 g_part_gpt_write(struct g_part_table *basetable, struct g_consumer *cp)
 917 {
 918         unsigned char *buf, *bp;
 919         struct g_provider *pp;
 920         struct g_part_entry *baseentry;
 921         struct g_part_gpt_entry *entry;
 922         struct g_part_gpt_table *table;
 923         size_t tblsz;
 924         uint32_t crc;
 925         int error, index;
 926
 927         pp = cp->provider;
 928         table = (struct g_part_gpt_table *)basetable;
 929         tblsz = (table->hdr->hdr_entries * table->hdr->hdr_entsz +
 930             pp->sectorsize - 1) / pp->sectorsize;
 931
 932         /* Write the PMBR */
 933         buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO);
 934         bcopy(table->mbr, buf, MBRSIZE);
 935         error = g_write_data(cp, 0, buf, pp->sectorsize);
 936         g_free(buf);
 937         if (error)
 938                 return (error);
 939
 940         /* Allocate space for the header and entries. */
 941         buf = g_malloc((tblsz + 1) * pp->sectorsize, M_WAITOK | M_ZERO);
 942
 943         memcpy(buf, table->hdr->hdr_sig, sizeof(table->hdr->hdr_sig));
 944         le32enc(buf + 8, table->hdr->hdr_revision);
 945         le32enc(buf + 12, table->hdr->hdr_size);
 946         le64enc(buf + 40, table->hdr->hdr_lba_start);
 947         le64enc(buf + 48, table->hdr->hdr_lba_end);
 948         le_uuid_enc(buf + 56, &table->hdr->hdr_uuid);
 949         le32enc(buf + 80, table->hdr->hdr_entries);
 950         le32enc(buf + 84, table->hdr->hdr_entsz);
 951
 952         LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) {
 953                 if (baseentry->gpe_deleted)
 954                         continue;
 955                 entry = (struct g_part_gpt_entry *)baseentry;
 956                 index = baseentry->gpe_index - 1;
 957                 bp = buf + pp->sectorsize + table->hdr->hdr_entsz * index;
 958                 le_uuid_enc(bp, &entry->ent.ent_type);
 959                 le_uuid_enc(bp + 16, &entry->ent.ent_uuid);
 960                 le64enc(bp + 32, entry->ent.ent_lba_start);
 961                 le64enc(bp + 40, entry->ent.ent_lba_end);
 962                 le64enc(bp + 48, entry->ent.ent_attr);
 963                 memcpy(bp + 56, entry->ent.ent_name,
 964                     sizeof(entry->ent.ent_name));
 965         }
 966
 967         crc = crc32(buf + pp->sectorsize,
 968             table->hdr->hdr_entries * table->hdr->hdr_entsz);
 969         le32enc(buf + 88, crc);
 970
 971         /* Write primary meta-data. */
 972         le32enc(buf + 16, 0);   /* hdr_crc_self. */
 973         le64enc(buf + 24, table->lba[GPT_ELT_PRIHDR]);  /* hdr_lba_self. */
 974         le64enc(buf + 32, table->lba[GPT_ELT_SECHDR]);  /* hdr_lba_alt. */
 975         le64enc(buf + 72, table->lba[GPT_ELT_PRITBL]);  /* hdr_lba_table. */
 976         crc = crc32(buf, table->hdr->hdr_size);
 977         le32enc(buf + 16, crc);
 978
 979         for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) {
 980                 error = g_write_data(cp,
 981                     (table->lba[GPT_ELT_PRITBL] + index) * pp->sectorsize,
 982                     buf + (index + 1) * pp->sectorsize,
 983                     (tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS:
 984                     (tblsz - index) * pp->sectorsize);
 985                 if (error)
 986                         goto out;
 987         }
 988         error = g_write_data(cp, table->lba[GPT_ELT_PRIHDR] * pp->sectorsize,
 989             buf, pp->sectorsize);
 990         if (error)
 991                 goto out;
 992
 993         /* Write secondary meta-data. */
 994         le32enc(buf + 16, 0);   /* hdr_crc_self. */
 995         le64enc(buf + 24, table->lba[GPT_ELT_SECHDR]);  /* hdr_lba_self. */
 996         le64enc(buf + 32, table->lba[GPT_ELT_PRIHDR]);  /* hdr_lba_alt. */
 997         le64enc(buf + 72, table->lba[GPT_ELT_SECTBL]);  /* hdr_lba_table. */
 998         crc = crc32(buf, table->hdr->hdr_size);
 999         le32enc(buf + 16, crc);
1000
1001         for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) {
1002                 error = g_write_data(cp,
1003                     (table->lba[GPT_ELT_SECTBL] + index) * pp->sectorsize,
1004                     buf + (index + 1) * pp->sectorsize,
1005                     (tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS:
1006                     (tblsz - index) * pp->sectorsize);
1007                 if (error)
1008                         goto out;
1009         }
1010         error = g_write_data(cp, table->lba[GPT_ELT_SECHDR] * pp->sectorsize,
1011             buf, pp->sectorsize);
1012
1013  out:
1014         g_free(buf);
1015         return (error);
1016 }
1017
1018 static void
1019 g_gpt_set_defaults(struct g_part_table *basetable, struct g_provider *pp)
1020 {
1021         struct g_part_gpt_table *table;
1022         quad_t last;
1023         size_t tblsz;
1024
1025         table = (struct g_part_gpt_table *)basetable;
1026         last = pp->mediasize / pp->sectorsize - 1;
1027         tblsz = (basetable->gpt_entries * sizeof(struct gpt_ent) +
1028             pp->sectorsize - 1) / pp->sectorsize;
1029
1030         table->lba[GPT_ELT_PRIHDR] = 1;
1031         table->lba[GPT_ELT_PRITBL] = 2;
1032         table->lba[GPT_ELT_SECHDR] = last;
1033         table->lba[GPT_ELT_SECTBL] = last - tblsz;
1034         table->state[GPT_ELT_PRIHDR] = GPT_STATE_OK;
1035         table->state[GPT_ELT_PRITBL] = GPT_STATE_OK;
1036         table->state[GPT_ELT_SECHDR] = GPT_STATE_OK;
1037         table->state[GPT_ELT_SECTBL] = GPT_STATE_OK;
1038
1039         table->hdr->hdr_lba_start = 2 + tblsz;
1040         table->hdr->hdr_lba_end = last - tblsz - 1;
1041
1042         basetable->gpt_first = table->hdr->hdr_lba_start;
1043         basetable->gpt_last = table->hdr->hdr_lba_end;
1044 }
1045
1046 static void
1047 g_gpt_printf_utf16(struct sbuf *sb, uint16_t *str, size_t len)
1048 {
1049         u_int bo;
1050         uint32_t ch;
1051         uint16_t c;
1052
1053         bo = LITTLE_ENDIAN;     /* GPT is little-endian */
1054         while (len > 0 && *str != 0) {
1055                 ch = (bo == BIG_ENDIAN) ? be16toh(*str) : le16toh(*str);
1056                 str++, len--;
1057                 if ((ch & 0xf800) == 0xd800) {
1058                         if (len > 0) {
1059                                 c = (bo == BIG_ENDIAN) ? be16toh(*str)
1060                                     : le16toh(*str);
1061                                 str++, len--;
1062                         } else
1063                                 c = 0xfffd;
1064                         if ((ch & 0x400) == 0 && (c & 0xfc00) == 0xdc00) {
1065                                 ch = ((ch & 0x3ff) << 10) + (c & 0x3ff);
1066                                 ch += 0x10000;
1067                         } else
1068                                 ch = 0xfffd;
1069                 } else if (ch == 0xfffe) { /* BOM (U+FEFF) swapped. */
1070                         bo = (bo == BIG_ENDIAN) ? LITTLE_ENDIAN : BIG_ENDIAN;
1071                         continue;
1072                 } else if (ch == 0xfeff) /* BOM (U+FEFF) unswapped. */
1073                         continue;
1074
1075                 /* Write the Unicode character in UTF-8 */
1076                 if (ch < 0x80)
1077                         sbuf_printf(sb, "%c", ch);
1078                 else if (ch < 0x800)
1079                         sbuf_printf(sb, "%c%c", 0xc0 | (ch >> 6),
1080                             0x80 | (ch & 0x3f));
1081                 else if (ch < 0x10000)
1082                         sbuf_printf(sb, "%c%c%c", 0xe0 | (ch >> 12),
1083                             0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
1084                 else if (ch < 0x200000)
1085                         sbuf_printf(sb, "%c%c%c%c", 0xf0 | (ch >> 18),
1086                             0x80 | ((ch >> 12) & 0x3f),
1087                             0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
1088         }
1089 }
1090
1091 static void
1092 g_gpt_utf8_to_utf16(const uint8_t *s8, uint16_t *s16, size_t s16len)
1093 {
1094         size_t s16idx, s8idx;
1095         uint32_t utfchar;
1096         unsigned int c, utfbytes;
1097
1098         s8idx = s16idx = 0;
1099         utfchar = 0;
1100         utfbytes = 0;
1101         bzero(s16, s16len << 1);
1102         while (s8[s8idx] != 0 && s16idx < s16len) {
1103                 c = s8[s8idx++];
1104                 if ((c & 0xc0) != 0x80) {
1105                         /* Initial characters. */
1106                         if (utfbytes != 0) {
1107                                 /* Incomplete encoding of previous char. */
1108                                 s16[s16idx++] = htole16(0xfffd);
1109                         }
1110                         if ((c & 0xf8) == 0xf0) {
1111                                 utfchar = c & 0x07;
1112                                 utfbytes = 3;
1113                         } else if ((c & 0xf0) == 0xe0) {
1114                                 utfchar = c & 0x0f;
1115                                 utfbytes = 2;
1116                         } else if ((c & 0xe0) == 0xc0) {
1117                                 utfchar = c & 0x1f;
1118                                 utfbytes = 1;
1119                         } else {
1120                                 utfchar = c & 0x7f;
1121                                 utfbytes = 0;
1122                         }
1123                 } else {
1124                         /* Followup characters. */
1125                         if (utfbytes > 0) {
1126                                 utfchar = (utfchar << 6) + (c & 0x3f);
1127                                 utfbytes--;
1128                         } else if (utfbytes == 0)
1129                                 utfbytes = ~0;
1130                 }
1131                 /*
1132                  * Write the complete Unicode character as UTF-16 when we
1133                  * have all the UTF-8 charactars collected.
1134                  */
1135                 if (utfbytes == 0) {
1136                         /*
1137                          * If we need to write 2 UTF-16 characters, but
1138                          * we only have room for 1, then we truncate the
1139                          * string by writing a 0 instead.
1140                          */
1141                         if (utfchar >= 0x10000 && s16idx < s16len - 1) {
1142                                 s16[s16idx++] =
1143                                     htole16(0xd800 | ((utfchar >> 10) - 0x40));
1144                                 s16[s16idx++] =
1145                                     htole16(0xdc00 | (utfchar & 0x3ff));
1146                         } else
1147                                 s16[s16idx++] = (utfchar >= 0x10000) ? 0 :
1148                                     htole16(utfchar);
1149                 }
1150         }
1151         /*
1152          * If our input string was truncated, append an invalid encoding
1153          * character to the output string.
1154          */
1155         if (utfbytes != 0 && s16idx < s16len)
1156                 s16[s16idx++] = htole16(0xfffd);
1157 }