dd0db05da2
still valid. We were checking the state of the header and not the table. PR: 119868 Based on a patch from: Jaakko Heinonen <jh@saunalahti.fi> MFC after: 1 week
910 lines
27 KiB
C
910 lines
27 KiB
C
/*-
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* Copyright (c) 2002, 2005, 2006, 2007 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bio.h>
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#include <sys/diskmbr.h>
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#include <sys/endian.h>
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#include <sys/gpt.h>
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#include <sys/kernel.h>
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#include <sys/kobj.h>
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#include <sys/limits.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/queue.h>
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#include <sys/sbuf.h>
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#include <sys/systm.h>
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#include <sys/uuid.h>
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#include <geom/geom.h>
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#include <geom/part/g_part.h>
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#include "g_part_if.h"
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CTASSERT(offsetof(struct gpt_hdr, padding) == 92);
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CTASSERT(sizeof(struct gpt_ent) == 128);
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#define EQUUID(a,b) (memcmp(a, b, sizeof(struct uuid)) == 0)
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#define MBRSIZE 512
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enum gpt_elt {
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GPT_ELT_PRIHDR,
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GPT_ELT_PRITBL,
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GPT_ELT_SECHDR,
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GPT_ELT_SECTBL,
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GPT_ELT_COUNT
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};
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enum gpt_state {
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GPT_STATE_UNKNOWN, /* Not determined. */
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GPT_STATE_MISSING, /* No signature found. */
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GPT_STATE_CORRUPT, /* Checksum mismatch. */
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GPT_STATE_INVALID, /* Nonconformant/invalid. */
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GPT_STATE_OK /* Perfectly fine. */
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};
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struct g_part_gpt_table {
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struct g_part_table base;
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u_char mbr[MBRSIZE];
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struct gpt_hdr hdr;
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quad_t lba[GPT_ELT_COUNT];
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enum gpt_state state[GPT_ELT_COUNT];
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};
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struct g_part_gpt_entry {
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struct g_part_entry base;
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struct gpt_ent ent;
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};
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static void g_gpt_printf_utf16(struct sbuf *, uint16_t *, size_t);
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static void g_gpt_utf8_to_utf16(const uint8_t *, uint16_t *, size_t);
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static int g_part_gpt_add(struct g_part_table *, struct g_part_entry *,
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struct g_part_parms *);
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static int g_part_gpt_bootcode(struct g_part_table *, struct g_part_parms *);
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static int g_part_gpt_create(struct g_part_table *, struct g_part_parms *);
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static int g_part_gpt_destroy(struct g_part_table *, struct g_part_parms *);
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static int g_part_gpt_dumpconf(struct g_part_table *, struct g_part_entry *,
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struct sbuf *, const char *);
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static int g_part_gpt_dumpto(struct g_part_table *, struct g_part_entry *);
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static int g_part_gpt_modify(struct g_part_table *, struct g_part_entry *,
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struct g_part_parms *);
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static char *g_part_gpt_name(struct g_part_table *, struct g_part_entry *,
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char *, size_t);
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static int g_part_gpt_probe(struct g_part_table *, struct g_consumer *);
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static int g_part_gpt_read(struct g_part_table *, struct g_consumer *);
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static const char *g_part_gpt_type(struct g_part_table *, struct g_part_entry *,
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char *, size_t);
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static int g_part_gpt_write(struct g_part_table *, struct g_consumer *);
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static kobj_method_t g_part_gpt_methods[] = {
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KOBJMETHOD(g_part_add, g_part_gpt_add),
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KOBJMETHOD(g_part_bootcode, g_part_gpt_bootcode),
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KOBJMETHOD(g_part_create, g_part_gpt_create),
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KOBJMETHOD(g_part_destroy, g_part_gpt_destroy),
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KOBJMETHOD(g_part_dumpconf, g_part_gpt_dumpconf),
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KOBJMETHOD(g_part_dumpto, g_part_gpt_dumpto),
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KOBJMETHOD(g_part_modify, g_part_gpt_modify),
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KOBJMETHOD(g_part_name, g_part_gpt_name),
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KOBJMETHOD(g_part_probe, g_part_gpt_probe),
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KOBJMETHOD(g_part_read, g_part_gpt_read),
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KOBJMETHOD(g_part_type, g_part_gpt_type),
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KOBJMETHOD(g_part_write, g_part_gpt_write),
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{ 0, 0 }
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};
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static struct g_part_scheme g_part_gpt_scheme = {
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"GPT",
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g_part_gpt_methods,
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sizeof(struct g_part_gpt_table),
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.gps_entrysz = sizeof(struct g_part_gpt_entry),
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.gps_minent = 128,
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.gps_maxent = INT_MAX,
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.gps_bootcodesz = MBRSIZE,
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};
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G_PART_SCHEME_DECLARE(g_part_gpt);
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static struct uuid gpt_uuid_apple_hfs = GPT_ENT_TYPE_APPLE_HFS;
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static struct uuid gpt_uuid_efi = GPT_ENT_TYPE_EFI;
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static struct uuid gpt_uuid_freebsd = GPT_ENT_TYPE_FREEBSD;
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static struct uuid gpt_uuid_freebsd_boot = GPT_ENT_TYPE_FREEBSD_BOOT;
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static struct uuid gpt_uuid_freebsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP;
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static struct uuid gpt_uuid_freebsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS;
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static struct uuid gpt_uuid_freebsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM;
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static struct uuid gpt_uuid_freebsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS;
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static struct uuid gpt_uuid_linux_swap = GPT_ENT_TYPE_LINUX_SWAP;
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static struct uuid gpt_uuid_mbr = GPT_ENT_TYPE_MBR;
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static struct uuid gpt_uuid_unused = GPT_ENT_TYPE_UNUSED;
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static void
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gpt_read_hdr(struct g_part_gpt_table *table, struct g_consumer *cp,
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enum gpt_elt elt, struct gpt_hdr *hdr)
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{
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struct uuid uuid;
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struct g_provider *pp;
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char *buf;
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quad_t lba, last;
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int error;
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uint32_t crc, sz;
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pp = cp->provider;
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last = (pp->mediasize / pp->sectorsize) - 1;
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table->lba[elt] = (elt == GPT_ELT_PRIHDR) ? 1 : last;
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table->state[elt] = GPT_STATE_MISSING;
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buf = g_read_data(cp, table->lba[elt] * pp->sectorsize, pp->sectorsize,
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&error);
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if (buf == NULL)
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return;
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bcopy(buf, hdr, sizeof(*hdr));
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if (memcmp(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig)) != 0)
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return;
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table->state[elt] = GPT_STATE_CORRUPT;
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sz = le32toh(hdr->hdr_size);
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if (sz < 92 || sz > pp->sectorsize)
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return;
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crc = le32toh(hdr->hdr_crc_self);
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hdr->hdr_crc_self = 0;
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if (crc32(hdr, sz) != crc)
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return;
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hdr->hdr_size = sz;
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hdr->hdr_crc_self = crc;
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table->state[elt] = GPT_STATE_INVALID;
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hdr->hdr_revision = le32toh(hdr->hdr_revision);
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if (hdr->hdr_revision < 0x00010000)
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return;
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hdr->hdr_lba_self = le64toh(hdr->hdr_lba_self);
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if (hdr->hdr_lba_self != table->lba[elt])
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return;
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hdr->hdr_lba_alt = le64toh(hdr->hdr_lba_alt);
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/* Check the managed area. */
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hdr->hdr_lba_start = le64toh(hdr->hdr_lba_start);
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if (hdr->hdr_lba_start < 2 || hdr->hdr_lba_start >= last)
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return;
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hdr->hdr_lba_end = le64toh(hdr->hdr_lba_end);
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if (hdr->hdr_lba_end < hdr->hdr_lba_start || hdr->hdr_lba_end >= last)
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return;
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/* Check the table location and size of the table. */
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hdr->hdr_entries = le32toh(hdr->hdr_entries);
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hdr->hdr_entsz = le32toh(hdr->hdr_entsz);
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if (hdr->hdr_entries == 0 || hdr->hdr_entsz < 128 ||
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(hdr->hdr_entsz & 7) != 0)
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return;
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hdr->hdr_lba_table = le64toh(hdr->hdr_lba_table);
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if (hdr->hdr_lba_table < 2 || hdr->hdr_lba_table >= last)
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return;
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if (hdr->hdr_lba_table >= hdr->hdr_lba_start &&
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hdr->hdr_lba_table <= hdr->hdr_lba_end)
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return;
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lba = hdr->hdr_lba_table +
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(hdr->hdr_entries * hdr->hdr_entsz + pp->sectorsize - 1) /
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pp->sectorsize - 1;
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if (lba >= last)
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return;
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if (lba >= hdr->hdr_lba_start && lba <= hdr->hdr_lba_end)
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return;
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table->state[elt] = GPT_STATE_OK;
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le_uuid_dec(&hdr->hdr_uuid, &uuid);
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hdr->hdr_uuid = uuid;
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hdr->hdr_crc_table = le32toh(hdr->hdr_crc_table);
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}
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static struct gpt_ent *
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gpt_read_tbl(struct g_part_gpt_table *table, struct g_consumer *cp,
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enum gpt_elt elt, struct gpt_hdr *hdr)
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{
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struct g_provider *pp;
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struct gpt_ent *ent, *tbl;
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char *buf, *p;
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unsigned int idx, sectors, tblsz;
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int error;
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pp = cp->provider;
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table->lba[elt] = hdr->hdr_lba_table;
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table->state[elt] = GPT_STATE_MISSING;
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tblsz = hdr->hdr_entries * hdr->hdr_entsz;
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sectors = (tblsz + pp->sectorsize - 1) / pp->sectorsize;
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buf = g_read_data(cp, table->lba[elt] * pp->sectorsize,
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sectors * pp->sectorsize, &error);
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if (buf == NULL)
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return (NULL);
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table->state[elt] = GPT_STATE_CORRUPT;
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if (crc32(buf, tblsz) != hdr->hdr_crc_table) {
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g_free(buf);
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return (NULL);
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}
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table->state[elt] = GPT_STATE_OK;
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tbl = g_malloc(hdr->hdr_entries * sizeof(struct gpt_ent),
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M_WAITOK | M_ZERO);
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for (idx = 0, ent = tbl, p = buf;
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idx < hdr->hdr_entries;
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idx++, ent++, p += hdr->hdr_entsz) {
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le_uuid_dec(p, &ent->ent_type);
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le_uuid_dec(p + 16, &ent->ent_uuid);
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ent->ent_lba_start = le64dec(p + 32);
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ent->ent_lba_end = le64dec(p + 40);
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ent->ent_attr = le64dec(p + 48);
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/* Keep UTF-16 in little-endian. */
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bcopy(p + 56, ent->ent_name, sizeof(ent->ent_name));
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}
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g_free(buf);
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return (tbl);
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}
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static int
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gpt_matched_hdrs(struct gpt_hdr *pri, struct gpt_hdr *sec)
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{
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if (!EQUUID(&pri->hdr_uuid, &sec->hdr_uuid))
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return (0);
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return ((pri->hdr_revision == sec->hdr_revision &&
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pri->hdr_size == sec->hdr_size &&
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pri->hdr_lba_start == sec->hdr_lba_start &&
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pri->hdr_lba_end == sec->hdr_lba_end &&
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pri->hdr_entries == sec->hdr_entries &&
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pri->hdr_entsz == sec->hdr_entsz &&
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pri->hdr_crc_table == sec->hdr_crc_table) ? 1 : 0);
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}
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static int
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gpt_parse_type(const char *type, struct uuid *uuid)
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{
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struct uuid tmp;
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const char *alias;
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int error;
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if (type[0] == '!') {
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error = parse_uuid(type + 1, &tmp);
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if (error)
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return (error);
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if (EQUUID(&tmp, &gpt_uuid_unused))
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return (EINVAL);
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*uuid = tmp;
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return (0);
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}
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alias = g_part_alias_name(G_PART_ALIAS_EFI);
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if (!strcasecmp(type, alias)) {
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*uuid = gpt_uuid_efi;
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return (0);
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}
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alias = g_part_alias_name(G_PART_ALIAS_FREEBSD);
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if (!strcasecmp(type, alias)) {
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*uuid = gpt_uuid_freebsd;
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return (0);
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}
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alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_BOOT);
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if (!strcasecmp(type, alias)) {
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*uuid = gpt_uuid_freebsd_boot;
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return (0);
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}
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alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP);
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if (!strcasecmp(type, alias)) {
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*uuid = gpt_uuid_freebsd_swap;
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return (0);
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}
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alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS);
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if (!strcasecmp(type, alias)) {
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*uuid = gpt_uuid_freebsd_ufs;
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return (0);
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}
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alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM);
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if (!strcasecmp(type, alias)) {
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*uuid = gpt_uuid_freebsd_vinum;
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return (0);
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}
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alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS);
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if (!strcasecmp(type, alias)) {
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*uuid = gpt_uuid_freebsd_zfs;
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return (0);
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}
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alias = g_part_alias_name(G_PART_ALIAS_MBR);
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if (!strcasecmp(type, alias)) {
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*uuid = gpt_uuid_mbr;
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return (0);
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}
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alias = g_part_alias_name(G_PART_ALIAS_APPLE_HFS);
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if (!strcasecmp(type, alias)) {
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*uuid = gpt_uuid_apple_hfs;
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return (0);
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}
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return (EINVAL);
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}
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static int
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g_part_gpt_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
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struct g_part_parms *gpp)
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{
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struct g_part_gpt_entry *entry;
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int error;
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entry = (struct g_part_gpt_entry *)baseentry;
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error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type);
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if (error)
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return (error);
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kern_uuidgen(&entry->ent.ent_uuid, 1);
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entry->ent.ent_lba_start = baseentry->gpe_start;
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entry->ent.ent_lba_end = baseentry->gpe_end;
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if (baseentry->gpe_deleted) {
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entry->ent.ent_attr = 0;
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bzero(entry->ent.ent_name, sizeof(entry->ent.ent_name));
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}
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if (gpp->gpp_parms & G_PART_PARM_LABEL)
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g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name,
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sizeof(entry->ent.ent_name));
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return (0);
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}
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static int
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g_part_gpt_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp)
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{
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struct g_part_gpt_table *table;
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table = (struct g_part_gpt_table *)basetable;
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bcopy(gpp->gpp_codeptr, table->mbr, DOSPARTOFF);
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return (0);
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}
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static int
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g_part_gpt_create(struct g_part_table *basetable, struct g_part_parms *gpp)
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{
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struct g_provider *pp;
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struct g_part_gpt_table *table;
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quad_t last;
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size_t tblsz;
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table = (struct g_part_gpt_table *)basetable;
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pp = gpp->gpp_provider;
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tblsz = (basetable->gpt_entries * sizeof(struct gpt_ent) +
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pp->sectorsize - 1) / pp->sectorsize;
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if (pp->sectorsize < MBRSIZE ||
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pp->mediasize < (3 + 2 * tblsz + basetable->gpt_entries) *
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pp->sectorsize)
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return (ENOSPC);
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last = (pp->mediasize / pp->sectorsize) - 1;
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le16enc(table->mbr + DOSMAGICOFFSET, DOSMAGIC);
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table->mbr[DOSPARTOFF + 1] = 0xff; /* shd */
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table->mbr[DOSPARTOFF + 2] = 0xff; /* ssect */
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table->mbr[DOSPARTOFF + 3] = 0xff; /* scyl */
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table->mbr[DOSPARTOFF + 4] = 0xee; /* typ */
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table->mbr[DOSPARTOFF + 5] = 0xff; /* ehd */
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table->mbr[DOSPARTOFF + 6] = 0xff; /* esect */
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table->mbr[DOSPARTOFF + 7] = 0xff; /* ecyl */
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le32enc(table->mbr + DOSPARTOFF + 8, 1); /* start */
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le32enc(table->mbr + DOSPARTOFF + 12, MIN(last, 0xffffffffLL));
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table->lba[GPT_ELT_PRIHDR] = 1;
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table->lba[GPT_ELT_PRITBL] = 2;
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table->lba[GPT_ELT_SECHDR] = last;
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table->lba[GPT_ELT_SECTBL] = last - tblsz;
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bcopy(GPT_HDR_SIG, table->hdr.hdr_sig, sizeof(table->hdr.hdr_sig));
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table->hdr.hdr_revision = GPT_HDR_REVISION;
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table->hdr.hdr_size = offsetof(struct gpt_hdr, padding);
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table->hdr.hdr_lba_start = 2 + tblsz;
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|
table->hdr.hdr_lba_end = last - tblsz - 1;
|
|
kern_uuidgen(&table->hdr.hdr_uuid, 1);
|
|
table->hdr.hdr_entries = basetable->gpt_entries;
|
|
table->hdr.hdr_entsz = sizeof(struct gpt_ent);
|
|
|
|
basetable->gpt_first = table->hdr.hdr_lba_start;
|
|
basetable->gpt_last = table->hdr.hdr_lba_end;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
g_part_gpt_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
|
|
{
|
|
|
|
/*
|
|
* Wipe the first 2 sectors as well as the last to clear the
|
|
* partitioning.
|
|
*/
|
|
basetable->gpt_smhead |= 3;
|
|
basetable->gpt_smtail |= 1;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
g_part_gpt_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry,
|
|
struct sbuf *sb, const char *indent)
|
|
{
|
|
struct g_part_gpt_entry *entry;
|
|
|
|
entry = (struct g_part_gpt_entry *)baseentry;
|
|
if (indent == NULL) {
|
|
/* conftxt: libdisk compatibility */
|
|
sbuf_printf(sb, " xs GPT xt ");
|
|
sbuf_printf_uuid(sb, &entry->ent.ent_type);
|
|
} else if (entry != NULL) {
|
|
/* confxml: partition entry information */
|
|
sbuf_printf(sb, "%s<label>", indent);
|
|
g_gpt_printf_utf16(sb, entry->ent.ent_name,
|
|
sizeof(entry->ent.ent_name) >> 1);
|
|
sbuf_printf(sb, "</label>\n");
|
|
sbuf_printf(sb, "%s<rawtype>", indent);
|
|
sbuf_printf_uuid(sb, &entry->ent.ent_type);
|
|
sbuf_printf(sb, "</rawtype>\n");
|
|
} else {
|
|
/* confxml: scheme information */
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
g_part_gpt_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
|
|
{
|
|
struct g_part_gpt_entry *entry;
|
|
|
|
entry = (struct g_part_gpt_entry *)baseentry;
|
|
return ((EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd_swap) ||
|
|
EQUUID(&entry->ent.ent_type, &gpt_uuid_linux_swap)) ? 1 : 0);
|
|
}
|
|
|
|
static int
|
|
g_part_gpt_modify(struct g_part_table *basetable,
|
|
struct g_part_entry *baseentry, struct g_part_parms *gpp)
|
|
{
|
|
struct g_part_gpt_entry *entry;
|
|
int error;
|
|
|
|
entry = (struct g_part_gpt_entry *)baseentry;
|
|
if (gpp->gpp_parms & G_PART_PARM_TYPE) {
|
|
error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
if (gpp->gpp_parms & G_PART_PARM_LABEL)
|
|
g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name,
|
|
sizeof(entry->ent.ent_name));
|
|
return (0);
|
|
}
|
|
|
|
static char *
|
|
g_part_gpt_name(struct g_part_table *table, struct g_part_entry *baseentry,
|
|
char *buf, size_t bufsz)
|
|
{
|
|
struct g_part_gpt_entry *entry;
|
|
char c;
|
|
|
|
entry = (struct g_part_gpt_entry *)baseentry;
|
|
c = (EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd)) ? 's' : 'p';
|
|
snprintf(buf, bufsz, "%c%d", c, baseentry->gpe_index);
|
|
return (buf);
|
|
}
|
|
|
|
static int
|
|
g_part_gpt_probe(struct g_part_table *table, struct g_consumer *cp)
|
|
{
|
|
struct g_provider *pp;
|
|
char *buf;
|
|
int error, res;
|
|
|
|
/* We don't nest, which means that our depth should be 0. */
|
|
if (table->gpt_depth != 0)
|
|
return (ENXIO);
|
|
|
|
pp = cp->provider;
|
|
|
|
/*
|
|
* Sanity-check the provider. Since the first sector on the provider
|
|
* must be a PMBR and a PMBR is 512 bytes large, the sector size
|
|
* must be at least 512 bytes. Also, since the theoretical minimum
|
|
* number of sectors needed by GPT is 6, any medium that has less
|
|
* than 6 sectors is never going to be able to hold a GPT. The
|
|
* number 6 comes from:
|
|
* 1 sector for the PMBR
|
|
* 2 sectors for the GPT headers (each 1 sector)
|
|
* 2 sectors for the GPT tables (each 1 sector)
|
|
* 1 sector for an actual partition
|
|
* It's better to catch this pathological case early than behaving
|
|
* pathologically later on...
|
|
*/
|
|
if (pp->sectorsize < MBRSIZE || pp->mediasize < 6 * pp->sectorsize)
|
|
return (ENOSPC);
|
|
|
|
/* Check that there's a MBR. */
|
|
buf = g_read_data(cp, 0L, pp->sectorsize, &error);
|
|
if (buf == NULL)
|
|
return (error);
|
|
res = le16dec(buf + DOSMAGICOFFSET);
|
|
g_free(buf);
|
|
if (res != DOSMAGIC)
|
|
return (ENXIO);
|
|
|
|
/* Check that there's a primary header. */
|
|
buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error);
|
|
if (buf == NULL)
|
|
return (error);
|
|
res = memcmp(buf, GPT_HDR_SIG, 8);
|
|
g_free(buf);
|
|
if (res == 0)
|
|
return (G_PART_PROBE_PRI_HIGH);
|
|
|
|
/* No primary? Check that there's a secondary. */
|
|
buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize,
|
|
&error);
|
|
if (buf == NULL)
|
|
return (error);
|
|
res = memcmp(buf, GPT_HDR_SIG, 8);
|
|
g_free(buf);
|
|
return ((res == 0) ? G_PART_PROBE_PRI_HIGH : ENXIO);
|
|
}
|
|
|
|
static int
|
|
g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp)
|
|
{
|
|
struct gpt_hdr prihdr, sechdr;
|
|
struct gpt_ent *tbl, *pritbl, *sectbl;
|
|
struct g_provider *pp;
|
|
struct g_part_gpt_table *table;
|
|
struct g_part_gpt_entry *entry;
|
|
u_char *buf;
|
|
int error, index;
|
|
|
|
table = (struct g_part_gpt_table *)basetable;
|
|
pp = cp->provider;
|
|
|
|
/* Read the PMBR */
|
|
buf = g_read_data(cp, 0, pp->sectorsize, &error);
|
|
if (buf == NULL)
|
|
return (error);
|
|
bcopy(buf, table->mbr, MBRSIZE);
|
|
g_free(buf);
|
|
|
|
/* Read the primary header and table. */
|
|
gpt_read_hdr(table, cp, GPT_ELT_PRIHDR, &prihdr);
|
|
if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK) {
|
|
pritbl = gpt_read_tbl(table, cp, GPT_ELT_PRITBL, &prihdr);
|
|
} else {
|
|
table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING;
|
|
pritbl = NULL;
|
|
}
|
|
|
|
/* Read the secondary header and table. */
|
|
gpt_read_hdr(table, cp, GPT_ELT_SECHDR, &sechdr);
|
|
if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK) {
|
|
sectbl = gpt_read_tbl(table, cp, GPT_ELT_SECTBL, &sechdr);
|
|
} else {
|
|
table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING;
|
|
sectbl = NULL;
|
|
}
|
|
|
|
/* Fail if we haven't got any good tables at all. */
|
|
if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK &&
|
|
table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) {
|
|
printf("GEOM: %s: corrupt or invalid GPT detected.\n",
|
|
pp->name);
|
|
printf("GEOM: %s: GPT rejected -- may not be recoverable.\n",
|
|
pp->name);
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* If both headers are good but they disagree with each other,
|
|
* then invalidate one. We prefer to keep the primary header,
|
|
* unless the primary table is corrupt.
|
|
*/
|
|
if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK &&
|
|
table->state[GPT_ELT_SECHDR] == GPT_STATE_OK &&
|
|
!gpt_matched_hdrs(&prihdr, &sechdr)) {
|
|
if (table->state[GPT_ELT_PRITBL] == GPT_STATE_OK) {
|
|
table->state[GPT_ELT_SECHDR] = GPT_STATE_INVALID;
|
|
table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING;
|
|
} else {
|
|
table->state[GPT_ELT_PRIHDR] = GPT_STATE_INVALID;
|
|
table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING;
|
|
}
|
|
}
|
|
|
|
if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK) {
|
|
printf("GEOM: %s: the primary GPT table is corrupt or "
|
|
"invalid.\n", pp->name);
|
|
printf("GEOM: %s: using the secondary instead -- recovery "
|
|
"strongly advised.\n", pp->name);
|
|
table->hdr = sechdr;
|
|
tbl = sectbl;
|
|
if (pritbl != NULL)
|
|
g_free(pritbl);
|
|
} else {
|
|
if (table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) {
|
|
printf("GEOM: %s: the secondary GPT table is corrupt "
|
|
"or invalid.\n", pp->name);
|
|
printf("GEOM: %s: using the primary only -- recovery "
|
|
"suggested.\n", pp->name);
|
|
}
|
|
table->hdr = prihdr;
|
|
tbl = pritbl;
|
|
if (sectbl != NULL)
|
|
g_free(sectbl);
|
|
}
|
|
|
|
basetable->gpt_first = table->hdr.hdr_lba_start;
|
|
basetable->gpt_last = table->hdr.hdr_lba_end;
|
|
basetable->gpt_entries = table->hdr.hdr_entries;
|
|
|
|
for (index = basetable->gpt_entries - 1; index >= 0; index--) {
|
|
if (EQUUID(&tbl[index].ent_type, &gpt_uuid_unused))
|
|
continue;
|
|
entry = (struct g_part_gpt_entry *)g_part_new_entry(basetable,
|
|
index+1, tbl[index].ent_lba_start, tbl[index].ent_lba_end);
|
|
entry->ent = tbl[index];
|
|
}
|
|
|
|
g_free(tbl);
|
|
return (0);
|
|
}
|
|
|
|
static const char *
|
|
g_part_gpt_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
|
|
char *buf, size_t bufsz)
|
|
{
|
|
struct g_part_gpt_entry *entry;
|
|
struct uuid *type;
|
|
|
|
entry = (struct g_part_gpt_entry *)baseentry;
|
|
type = &entry->ent.ent_type;
|
|
if (EQUUID(type, &gpt_uuid_efi))
|
|
return (g_part_alias_name(G_PART_ALIAS_EFI));
|
|
if (EQUUID(type, &gpt_uuid_freebsd))
|
|
return (g_part_alias_name(G_PART_ALIAS_FREEBSD));
|
|
if (EQUUID(type, &gpt_uuid_freebsd_boot))
|
|
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_BOOT));
|
|
if (EQUUID(type, &gpt_uuid_freebsd_swap))
|
|
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP));
|
|
if (EQUUID(type, &gpt_uuid_freebsd_ufs))
|
|
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS));
|
|
if (EQUUID(type, &gpt_uuid_freebsd_vinum))
|
|
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM));
|
|
if (EQUUID(type, &gpt_uuid_freebsd_zfs))
|
|
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS));
|
|
if (EQUUID(type, &gpt_uuid_mbr))
|
|
return (g_part_alias_name(G_PART_ALIAS_MBR));
|
|
buf[0] = '!';
|
|
snprintf_uuid(buf + 1, bufsz - 1, type);
|
|
return (buf);
|
|
}
|
|
|
|
static int
|
|
g_part_gpt_write(struct g_part_table *basetable, struct g_consumer *cp)
|
|
{
|
|
unsigned char *buf, *bp;
|
|
struct g_provider *pp;
|
|
struct g_part_entry *baseentry;
|
|
struct g_part_gpt_entry *entry;
|
|
struct g_part_gpt_table *table;
|
|
size_t tlbsz;
|
|
uint32_t crc;
|
|
int error, index;
|
|
|
|
pp = cp->provider;
|
|
table = (struct g_part_gpt_table *)basetable;
|
|
tlbsz = (table->hdr.hdr_entries * table->hdr.hdr_entsz +
|
|
pp->sectorsize - 1) / pp->sectorsize;
|
|
|
|
/* Write the PMBR */
|
|
buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO);
|
|
bcopy(table->mbr, buf, MBRSIZE);
|
|
error = g_write_data(cp, 0, buf, pp->sectorsize);
|
|
g_free(buf);
|
|
if (error)
|
|
return (error);
|
|
|
|
/* Allocate space for the header and entries. */
|
|
buf = g_malloc((tlbsz + 1) * pp->sectorsize, M_WAITOK | M_ZERO);
|
|
|
|
memcpy(buf, table->hdr.hdr_sig, sizeof(table->hdr.hdr_sig));
|
|
le32enc(buf + 8, table->hdr.hdr_revision);
|
|
le32enc(buf + 12, table->hdr.hdr_size);
|
|
le64enc(buf + 40, table->hdr.hdr_lba_start);
|
|
le64enc(buf + 48, table->hdr.hdr_lba_end);
|
|
le_uuid_enc(buf + 56, &table->hdr.hdr_uuid);
|
|
le32enc(buf + 80, table->hdr.hdr_entries);
|
|
le32enc(buf + 84, table->hdr.hdr_entsz);
|
|
|
|
LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) {
|
|
if (baseentry->gpe_deleted)
|
|
continue;
|
|
entry = (struct g_part_gpt_entry *)baseentry;
|
|
index = baseentry->gpe_index - 1;
|
|
bp = buf + pp->sectorsize + table->hdr.hdr_entsz * index;
|
|
le_uuid_enc(bp, &entry->ent.ent_type);
|
|
le_uuid_enc(bp + 16, &entry->ent.ent_uuid);
|
|
le64enc(bp + 32, entry->ent.ent_lba_start);
|
|
le64enc(bp + 40, entry->ent.ent_lba_end);
|
|
le64enc(bp + 48, entry->ent.ent_attr);
|
|
memcpy(bp + 56, entry->ent.ent_name,
|
|
sizeof(entry->ent.ent_name));
|
|
}
|
|
|
|
crc = crc32(buf + pp->sectorsize,
|
|
table->hdr.hdr_entries * table->hdr.hdr_entsz);
|
|
le32enc(buf + 88, crc);
|
|
|
|
/* Write primary meta-data. */
|
|
le32enc(buf + 16, 0); /* hdr_crc_self. */
|
|
le64enc(buf + 24, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_self. */
|
|
le64enc(buf + 32, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_alt. */
|
|
le64enc(buf + 72, table->lba[GPT_ELT_PRITBL]); /* hdr_lba_table. */
|
|
crc = crc32(buf, table->hdr.hdr_size);
|
|
le32enc(buf + 16, crc);
|
|
|
|
error = g_write_data(cp, table->lba[GPT_ELT_PRITBL] * pp->sectorsize,
|
|
buf + pp->sectorsize, tlbsz * pp->sectorsize);
|
|
if (error)
|
|
goto out;
|
|
error = g_write_data(cp, table->lba[GPT_ELT_PRIHDR] * pp->sectorsize,
|
|
buf, pp->sectorsize);
|
|
if (error)
|
|
goto out;
|
|
|
|
/* Write secondary meta-data. */
|
|
le32enc(buf + 16, 0); /* hdr_crc_self. */
|
|
le64enc(buf + 24, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_self. */
|
|
le64enc(buf + 32, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_alt. */
|
|
le64enc(buf + 72, table->lba[GPT_ELT_SECTBL]); /* hdr_lba_table. */
|
|
crc = crc32(buf, table->hdr.hdr_size);
|
|
le32enc(buf + 16, crc);
|
|
|
|
error = g_write_data(cp, table->lba[GPT_ELT_SECTBL] * pp->sectorsize,
|
|
buf + pp->sectorsize, tlbsz * pp->sectorsize);
|
|
if (error)
|
|
goto out;
|
|
error = g_write_data(cp, table->lba[GPT_ELT_SECHDR] * pp->sectorsize,
|
|
buf, pp->sectorsize);
|
|
|
|
out:
|
|
g_free(buf);
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
g_gpt_printf_utf16(struct sbuf *sb, uint16_t *str, size_t len)
|
|
{
|
|
u_int bo;
|
|
uint32_t ch;
|
|
uint16_t c;
|
|
|
|
bo = LITTLE_ENDIAN; /* GPT is little-endian */
|
|
while (len > 0 && *str != 0) {
|
|
ch = (bo == BIG_ENDIAN) ? be16toh(*str) : le16toh(*str);
|
|
str++, len--;
|
|
if ((ch & 0xf800) == 0xd800) {
|
|
if (len > 0) {
|
|
c = (bo == BIG_ENDIAN) ? be16toh(*str)
|
|
: le16toh(*str);
|
|
str++, len--;
|
|
} else
|
|
c = 0xfffd;
|
|
if ((ch & 0x400) == 0 && (c & 0xfc00) == 0xdc00) {
|
|
ch = ((ch & 0x3ff) << 10) + (c & 0x3ff);
|
|
ch += 0x10000;
|
|
} else
|
|
ch = 0xfffd;
|
|
} else if (ch == 0xfffe) { /* BOM (U+FEFF) swapped. */
|
|
bo = (bo == BIG_ENDIAN) ? LITTLE_ENDIAN : BIG_ENDIAN;
|
|
continue;
|
|
} else if (ch == 0xfeff) /* BOM (U+FEFF) unswapped. */
|
|
continue;
|
|
|
|
/* Write the Unicode character in UTF-8 */
|
|
if (ch < 0x80)
|
|
sbuf_printf(sb, "%c", ch);
|
|
else if (ch < 0x800)
|
|
sbuf_printf(sb, "%c%c", 0xc0 | (ch >> 6),
|
|
0x80 | (ch & 0x3f));
|
|
else if (ch < 0x10000)
|
|
sbuf_printf(sb, "%c%c%c", 0xe0 | (ch >> 12),
|
|
0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
|
|
else if (ch < 0x200000)
|
|
sbuf_printf(sb, "%c%c%c%c", 0xf0 | (ch >> 18),
|
|
0x80 | ((ch >> 12) & 0x3f),
|
|
0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
|
|
}
|
|
}
|
|
|
|
static void
|
|
g_gpt_utf8_to_utf16(const uint8_t *s8, uint16_t *s16, size_t s16len)
|
|
{
|
|
size_t s16idx, s8idx;
|
|
uint32_t utfchar;
|
|
unsigned int c, utfbytes;
|
|
|
|
s8idx = s16idx = 0;
|
|
utfchar = 0;
|
|
utfbytes = 0;
|
|
bzero(s16, s16len << 1);
|
|
while (s8[s8idx] != 0 && s16idx < s16len) {
|
|
c = s8[s8idx++];
|
|
if ((c & 0xc0) != 0x80) {
|
|
/* Initial characters. */
|
|
if (utfbytes != 0) {
|
|
/* Incomplete encoding of previous char. */
|
|
s16[s16idx++] = htole16(0xfffd);
|
|
}
|
|
if ((c & 0xf8) == 0xf0) {
|
|
utfchar = c & 0x07;
|
|
utfbytes = 3;
|
|
} else if ((c & 0xf0) == 0xe0) {
|
|
utfchar = c & 0x0f;
|
|
utfbytes = 2;
|
|
} else if ((c & 0xe0) == 0xc0) {
|
|
utfchar = c & 0x1f;
|
|
utfbytes = 1;
|
|
} else {
|
|
utfchar = c & 0x7f;
|
|
utfbytes = 0;
|
|
}
|
|
} else {
|
|
/* Followup characters. */
|
|
if (utfbytes > 0) {
|
|
utfchar = (utfchar << 6) + (c & 0x3f);
|
|
utfbytes--;
|
|
} else if (utfbytes == 0)
|
|
utfbytes = ~0;
|
|
}
|
|
/*
|
|
* Write the complete Unicode character as UTF-16 when we
|
|
* have all the UTF-8 charactars collected.
|
|
*/
|
|
if (utfbytes == 0) {
|
|
/*
|
|
* If we need to write 2 UTF-16 characters, but
|
|
* we only have room for 1, then we truncate the
|
|
* string by writing a 0 instead.
|
|
*/
|
|
if (utfchar >= 0x10000 && s16idx < s16len - 1) {
|
|
s16[s16idx++] =
|
|
htole16(0xd800 | ((utfchar >> 10) - 0x40));
|
|
s16[s16idx++] =
|
|
htole16(0xdc00 | (utfchar & 0x3ff));
|
|
} else
|
|
s16[s16idx++] = (utfchar >= 0x10000) ? 0 :
|
|
htole16(utfchar);
|
|
}
|
|
}
|
|
/*
|
|
* If our input string was truncated, append an invalid encoding
|
|
* character to the output string.
|
|
*/
|
|
if (utfbytes != 0 && s16idx < s16len)
|
|
s16[s16idx++] = htole16(0xfffd);
|
|
}
|