1006 lines
25 KiB
C
1006 lines
25 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006,2007,2008,2009,2011 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/dl.h>
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#include <grub/disk.h>
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#include <grub/mm.h>
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#include <grub/err.h>
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#include <grub/misc.h>
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#include <grub/diskfilter.h>
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#include <grub/gpt_partition.h>
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#include <grub/i18n.h>
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#ifdef GRUB_UTIL
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#include <grub/emu/misc.h>
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#include <grub/emu/hostdisk.h>
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#endif
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GRUB_MOD_LICENSE ("GPLv3+");
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#define LDM_GUID_STRLEN 64
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#define LDM_NAME_STRLEN 32
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typedef grub_uint8_t *grub_ldm_id_t;
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enum { STRIPE = 1, SPANNED = 2, RAID5 = 3 };
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#define LDM_LABEL_SECTOR 6
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struct grub_ldm_vblk {
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char magic[4];
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grub_uint8_t unused1[12];
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grub_uint16_t update_status;
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grub_uint8_t flags;
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grub_uint8_t type;
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grub_uint32_t unused2;
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grub_uint8_t dynamic[104];
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} __attribute__ ((packed));
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#define LDM_VBLK_MAGIC "VBLK"
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enum
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{
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STATUS_CONSISTENT = 0,
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STATUS_STILL_ACTIVE = 1,
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STATUS_NOT_ACTIVE_YET = 2
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};
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enum
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{
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ENTRY_COMPONENT = 0x32,
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ENTRY_PARTITION = 0x33,
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ENTRY_DISK = 0x34,
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ENTRY_VOLUME = 0x51,
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};
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struct grub_ldm_label
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{
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char magic[8];
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grub_uint32_t unused1;
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grub_uint16_t ver_major;
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grub_uint16_t ver_minor;
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grub_uint8_t unused2[32];
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char disk_guid[LDM_GUID_STRLEN];
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char host_guid[LDM_GUID_STRLEN];
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char group_guid[LDM_GUID_STRLEN];
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char group_name[LDM_NAME_STRLEN];
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grub_uint8_t unused3[11];
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grub_uint64_t pv_start;
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grub_uint64_t pv_size;
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grub_uint64_t config_start;
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grub_uint64_t config_size;
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} __attribute__ ((packed));
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#define LDM_MAGIC "PRIVHEAD"
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static inline grub_uint64_t
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read_int (grub_uint8_t *in, grub_size_t s)
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{
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grub_uint8_t *ptr2;
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grub_uint64_t ret;
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ret = 0;
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for (ptr2 = in; ptr2 < in + s; ptr2++)
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{
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ret <<= 8;
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ret |= *ptr2;
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}
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return ret;
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}
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static const grub_gpt_part_type_t ldm_type = GRUB_GPT_PARTITION_TYPE_LDM;
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static grub_disk_addr_t
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gpt_ldm_sector (grub_disk_t dsk)
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{
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grub_disk_addr_t sector = 0;
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grub_err_t err;
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auto int hook (grub_disk_t disk, const grub_partition_t p);
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int hook (grub_disk_t disk, const grub_partition_t p)
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{
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struct grub_gpt_partentry gptdata;
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grub_partition_t p2;
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p2 = disk->partition;
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disk->partition = p->parent;
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if (grub_disk_read (disk, p->offset, p->index,
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sizeof (gptdata), &gptdata))
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{
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disk->partition = p2;
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return 0;
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}
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disk->partition = p2;
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if (! grub_memcmp (&gptdata.type, &ldm_type, 16))
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{
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sector = p->start + p->len - 1;
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return 1;
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}
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return 0;
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}
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err = grub_gpt_partition_map_iterate (dsk, hook);
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if (err)
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{
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grub_errno = GRUB_ERR_NONE;
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return 0;
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}
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return sector;
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}
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static struct grub_diskfilter_vg *
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make_vg (grub_disk_t disk,
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const struct grub_ldm_label *label)
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{
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grub_disk_addr_t startsec, endsec, cursec;
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struct grub_diskfilter_vg *vg;
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grub_err_t err;
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/* First time we see this volume group. We've to create the
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whole volume group structure. */
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vg = grub_malloc (sizeof (*vg));
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if (! vg)
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return NULL;
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vg->extent_size = 1;
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vg->name = grub_malloc (LDM_NAME_STRLEN + 1);
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vg->uuid = grub_malloc (LDM_GUID_STRLEN + 1);
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if (! vg->uuid || !vg->name)
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{
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grub_free (vg->uuid);
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grub_free (vg->name);
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return NULL;
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}
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grub_memcpy (vg->uuid, label->group_guid, LDM_GUID_STRLEN);
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grub_memcpy (vg->name, label->group_name, LDM_NAME_STRLEN);
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vg->name[LDM_NAME_STRLEN] = 0;
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vg->uuid[LDM_GUID_STRLEN] = 0;
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vg->uuid_len = grub_strlen (vg->uuid);
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vg->lvs = NULL;
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vg->pvs = NULL;
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startsec = grub_be_to_cpu64 (label->config_start);
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endsec = startsec + grub_be_to_cpu64 (label->config_size);
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/* First find disks. */
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for (cursec = startsec + 0x12; cursec < endsec; cursec++)
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{
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struct grub_ldm_vblk vblk[GRUB_DISK_SECTOR_SIZE
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/ sizeof (struct grub_ldm_vblk)];
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unsigned i;
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err = grub_disk_read (disk, cursec, 0,
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sizeof(vblk), &vblk);
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if (err)
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goto fail2;
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for (i = 0; i < ARRAY_SIZE (vblk); i++)
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{
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struct grub_diskfilter_pv *pv;
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grub_uint8_t *ptr;
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if (grub_memcmp (vblk[i].magic, LDM_VBLK_MAGIC,
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sizeof (vblk[i].magic)) != 0)
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continue;
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if (grub_be_to_cpu16 (vblk[i].update_status)
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!= STATUS_CONSISTENT
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&& grub_be_to_cpu16 (vblk[i].update_status)
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!= STATUS_STILL_ACTIVE)
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continue;
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if (vblk[i].type != ENTRY_DISK)
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continue;
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pv = grub_zalloc (sizeof (*pv));
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if (!pv)
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goto fail2;
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pv->disk = 0;
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ptr = vblk[i].dynamic;
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if (ptr + *ptr + 1 >= vblk[i].dynamic
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+ sizeof (vblk[i].dynamic))
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{
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grub_free (pv);
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goto fail2;
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}
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pv->internal_id = grub_malloc (ptr[0] + 2);
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if (!pv->internal_id)
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{
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grub_free (pv);
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goto fail2;
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}
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grub_memcpy (pv->internal_id, ptr, (grub_size_t) ptr[0] + 1);
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pv->internal_id[(grub_size_t) ptr[0] + 1] = 0;
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ptr += *ptr + 1;
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if (ptr + *ptr + 1 >= vblk[i].dynamic
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+ sizeof (vblk[i].dynamic))
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{
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grub_free (pv);
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goto fail2;
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}
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/* ptr = name. */
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ptr += *ptr + 1;
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if (ptr + *ptr + 1
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>= vblk[i].dynamic + sizeof (vblk[i].dynamic))
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{
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grub_free (pv);
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goto fail2;
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}
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pv->id.uuidlen = *ptr;
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pv->id.uuid = grub_malloc (pv->id.uuidlen + 1);
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grub_memcpy (pv->id.uuid, ptr + 1, pv->id.uuidlen);
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pv->id.uuid[pv->id.uuidlen] = 0;
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pv->next = vg->pvs;
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vg->pvs = pv;
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}
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}
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/* Then find LVs. */
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for (cursec = startsec + 0x12; cursec < endsec; cursec++)
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{
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struct grub_ldm_vblk vblk[GRUB_DISK_SECTOR_SIZE
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/ sizeof (struct grub_ldm_vblk)];
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unsigned i;
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err = grub_disk_read (disk, cursec, 0,
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sizeof(vblk), &vblk);
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if (err)
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goto fail2;
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for (i = 0; i < ARRAY_SIZE (vblk); i++)
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{
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struct grub_diskfilter_lv *lv;
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grub_uint8_t *ptr;
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if (grub_memcmp (vblk[i].magic, LDM_VBLK_MAGIC,
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sizeof (vblk[i].magic)) != 0)
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continue;
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if (grub_be_to_cpu16 (vblk[i].update_status)
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!= STATUS_CONSISTENT
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&& grub_be_to_cpu16 (vblk[i].update_status)
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!= STATUS_STILL_ACTIVE)
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continue;
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if (vblk[i].type != ENTRY_VOLUME)
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continue;
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lv = grub_zalloc (sizeof (*lv));
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if (!lv)
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goto fail2;
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lv->vg = vg;
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lv->segment_count = 1;
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lv->segment_alloc = 1;
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lv->visible = 1;
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lv->segments = grub_zalloc (sizeof (*lv->segments));
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if (!lv->segments)
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goto fail2;
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lv->segments->start_extent = 0;
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lv->segments->type = GRUB_DISKFILTER_MIRROR;
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lv->segments->node_count = 0;
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lv->segments->node_alloc = 8;
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lv->segments->nodes = grub_zalloc (sizeof (*lv->segments->nodes)
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* lv->segments->node_alloc);
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if (!lv->segments->nodes)
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goto fail2;
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ptr = vblk[i].dynamic;
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if (ptr + *ptr + 1 >= vblk[i].dynamic
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+ sizeof (vblk[i].dynamic))
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{
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grub_free (lv);
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goto fail2;
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}
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lv->internal_id = grub_malloc ((grub_size_t) ptr[0] + 2);
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if (!lv->internal_id)
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{
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grub_free (lv);
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goto fail2;
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}
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grub_memcpy (lv->internal_id, ptr, ptr[0] + 1);
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lv->internal_id[ptr[0] + 1] = 0;
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ptr += *ptr + 1;
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if (ptr + *ptr + 1 >= vblk[i].dynamic
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+ sizeof (vblk[i].dynamic))
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{
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grub_free (lv);
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goto fail2;
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}
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lv->name = grub_malloc (*ptr + 1);
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if (!lv->name)
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{
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grub_free (lv->internal_id);
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grub_free (lv);
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goto fail2;
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}
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grub_memcpy (lv->name, ptr + 1, *ptr);
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lv->name[*ptr] = 0;
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lv->fullname = grub_xasprintf ("ldm/%s/%s",
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vg->uuid, lv->name);
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if (!lv->fullname)
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{
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grub_free (lv->internal_id);
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grub_free (lv->name);
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grub_free (lv);
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goto fail2;
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}
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ptr += *ptr + 1;
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if (ptr + *ptr + 1
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>= vblk[i].dynamic + sizeof (vblk[i].dynamic))
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{
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grub_free (lv->internal_id);
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grub_free (lv->name);
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grub_free (lv);
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goto fail2;
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}
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/* ptr = volume type. */
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ptr += *ptr + 1;
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if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
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{
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grub_free (lv->internal_id);
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grub_free (lv->name);
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grub_free (lv);
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goto fail2;
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}
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/* ptr = flags. */
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ptr += *ptr + 1;
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if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
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{
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grub_free (lv->internal_id);
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grub_free (lv->name);
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grub_free (lv);
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goto fail2;
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}
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/* Skip state, type, unknown, volume number, zeros, flags. */
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ptr += 14 + 1 + 1 + 1 + 3 + 1;
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/* ptr = number of children. */
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if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
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{
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grub_free (lv->internal_id);
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grub_free (lv->name);
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grub_free (lv);
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goto fail2;
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}
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ptr += *ptr + 1;
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if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
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{
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grub_free (lv->internal_id);
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grub_free (lv->name);
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grub_free (lv);
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goto fail2;
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}
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/* Skip 2 more fields. */
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ptr += 8 + 8;
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if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic)
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|| ptr + *ptr + 1>= vblk[i].dynamic
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+ sizeof (vblk[i].dynamic))
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{
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grub_free (lv->internal_id);
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grub_free (lv->name);
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grub_free (lv);
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goto fail2;
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}
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lv->size = read_int (ptr + 1, *ptr);
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lv->segments->extent_count = lv->size;
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lv->next = vg->lvs;
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vg->lvs = lv;
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}
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}
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/* Now the components. */
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for (cursec = startsec + 0x12; cursec < endsec; cursec++)
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{
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struct grub_ldm_vblk vblk[GRUB_DISK_SECTOR_SIZE
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/ sizeof (struct grub_ldm_vblk)];
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unsigned i;
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err = grub_disk_read (disk, cursec, 0,
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sizeof(vblk), &vblk);
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if (err)
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goto fail2;
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for (i = 0; i < ARRAY_SIZE (vblk); i++)
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{
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struct grub_diskfilter_lv *comp;
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struct grub_diskfilter_lv *lv;
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grub_uint8_t type;
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grub_uint8_t *ptr;
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if (grub_memcmp (vblk[i].magic, LDM_VBLK_MAGIC,
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sizeof (vblk[i].magic)) != 0)
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continue;
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if (grub_be_to_cpu16 (vblk[i].update_status)
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!= STATUS_CONSISTENT
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&& grub_be_to_cpu16 (vblk[i].update_status)
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!= STATUS_STILL_ACTIVE)
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continue;
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if (vblk[i].type != ENTRY_COMPONENT)
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continue;
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comp = grub_zalloc (sizeof (*comp));
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if (!comp)
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goto fail2;
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comp->visible = 0;
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comp->name = 0;
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comp->fullname = 0;
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ptr = vblk[i].dynamic;
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if (ptr + *ptr + 1 >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
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{
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goto fail2;
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}
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comp->internal_id = grub_malloc ((grub_size_t) ptr[0] + 2);
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if (!comp->internal_id)
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{
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grub_free (comp);
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goto fail2;
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}
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grub_memcpy (comp->internal_id, ptr, ptr[0] + 1);
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comp->internal_id[ptr[0] + 1] = 0;
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ptr += *ptr + 1;
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if (ptr + *ptr + 1 >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
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{
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grub_free (comp->internal_id);
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grub_free (comp);
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goto fail2;
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}
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/* ptr = name. */
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ptr += *ptr + 1;
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if (ptr + *ptr + 1 >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
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{
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grub_free (comp->internal_id);
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grub_free (comp);
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goto fail2;
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}
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/* ptr = state. */
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ptr += *ptr + 1;
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type = *ptr++;
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/* skip zeros. */
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ptr += 4;
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if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
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{
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grub_free (comp->internal_id);
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grub_free (comp);
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goto fail2;
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}
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/* ptr = number of children. */
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ptr += *ptr + 1;
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if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
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{
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grub_free (comp->internal_id);
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grub_free (comp);
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goto fail2;
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}
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ptr += 8 + 8;
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if (ptr + *ptr + 1 >= vblk[i].dynamic
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+ sizeof (vblk[i].dynamic))
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{
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grub_free (comp->internal_id);
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grub_free (comp);
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goto fail2;
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}
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for (lv = vg->lvs; lv; lv = lv->next)
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{
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if (lv->internal_id[0] == ptr[0]
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&& grub_memcmp (lv->internal_id + 1, ptr + 1, ptr[0]) == 0)
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break;
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}
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if (!lv)
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{
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grub_free (comp->internal_id);
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grub_free (comp);
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continue;
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}
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comp->size = lv->size;
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if (type == SPANNED)
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{
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comp->segment_alloc = 8;
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comp->segment_count = 0;
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comp->segments = grub_malloc (sizeof (*comp->segments)
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* comp->segment_alloc);
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||
if (!comp->segments)
|
||
goto fail2;
|
||
}
|
||
else
|
||
{
|
||
comp->segment_alloc = 1;
|
||
comp->segment_count = 1;
|
||
comp->segments = grub_malloc (sizeof (*comp->segments));
|
||
if (!comp->segments)
|
||
goto fail2;
|
||
comp->segments->start_extent = 0;
|
||
comp->segments->extent_count = lv->size;
|
||
comp->segments->layout = 0;
|
||
if (type == STRIPE)
|
||
comp->segments->type = GRUB_DISKFILTER_STRIPED;
|
||
else if (type == RAID5)
|
||
{
|
||
comp->segments->type = GRUB_DISKFILTER_RAID5;
|
||
comp->segments->layout = GRUB_RAID_LAYOUT_SYMMETRIC_MASK;
|
||
}
|
||
else
|
||
goto fail2;
|
||
ptr += *ptr + 1;
|
||
ptr++;
|
||
if (!(vblk[i].flags & 0x10))
|
||
goto fail2;
|
||
if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic)
|
||
|| ptr + *ptr + 1 >= vblk[i].dynamic
|
||
+ sizeof (vblk[i].dynamic))
|
||
{
|
||
grub_free (comp->internal_id);
|
||
grub_free (comp);
|
||
goto fail2;
|
||
}
|
||
comp->segments->stripe_size = read_int (ptr + 1, *ptr);
|
||
ptr += *ptr + 1;
|
||
if (ptr + *ptr + 1 >= vblk[i].dynamic
|
||
+ sizeof (vblk[i].dynamic))
|
||
{
|
||
grub_free (comp->internal_id);
|
||
grub_free (comp);
|
||
goto fail2;
|
||
}
|
||
comp->segments->node_count = read_int (ptr + 1, *ptr);
|
||
comp->segments->node_alloc = comp->segments->node_count;
|
||
comp->segments->nodes = grub_zalloc (sizeof (*comp->segments->nodes)
|
||
* comp->segments->node_alloc);
|
||
if (!lv->segments->nodes)
|
||
goto fail2;
|
||
}
|
||
|
||
if (lv->segments->node_alloc == lv->segments->node_count)
|
||
{
|
||
void *t;
|
||
lv->segments->node_alloc *= 2;
|
||
t = grub_realloc (lv->segments->nodes,
|
||
sizeof (*lv->segments->nodes)
|
||
* lv->segments->node_alloc);
|
||
if (!t)
|
||
goto fail2;
|
||
lv->segments->nodes = t;
|
||
}
|
||
lv->segments->nodes[lv->segments->node_count].pv = 0;
|
||
lv->segments->nodes[lv->segments->node_count].start = 0;
|
||
lv->segments->nodes[lv->segments->node_count++].lv = comp;
|
||
comp->next = vg->lvs;
|
||
vg->lvs = comp;
|
||
}
|
||
}
|
||
/* Partitions. */
|
||
for (cursec = startsec + 0x12; cursec < endsec; cursec++)
|
||
{
|
||
struct grub_ldm_vblk vblk[GRUB_DISK_SECTOR_SIZE
|
||
/ sizeof (struct grub_ldm_vblk)];
|
||
unsigned i;
|
||
err = grub_disk_read (disk, cursec, 0,
|
||
sizeof(vblk), &vblk);
|
||
if (err)
|
||
goto fail2;
|
||
|
||
for (i = 0; i < ARRAY_SIZE (vblk); i++)
|
||
{
|
||
struct grub_diskfilter_lv *comp;
|
||
struct grub_diskfilter_node part;
|
||
grub_disk_addr_t start, size;
|
||
|
||
grub_uint8_t *ptr;
|
||
part.name = 0;
|
||
if (grub_memcmp (vblk[i].magic, LDM_VBLK_MAGIC,
|
||
sizeof (vblk[i].magic)) != 0)
|
||
continue;
|
||
if (grub_be_to_cpu16 (vblk[i].update_status)
|
||
!= STATUS_CONSISTENT
|
||
&& grub_be_to_cpu16 (vblk[i].update_status)
|
||
!= STATUS_STILL_ACTIVE)
|
||
continue;
|
||
if (vblk[i].type != ENTRY_PARTITION)
|
||
continue;
|
||
part.lv = 0;
|
||
part.pv = 0;
|
||
|
||
ptr = vblk[i].dynamic;
|
||
if (ptr + *ptr + 1 >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
|
||
{
|
||
goto fail2;
|
||
}
|
||
/* ID */
|
||
ptr += *ptr + 1;
|
||
if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
|
||
{
|
||
goto fail2;
|
||
}
|
||
/* ptr = name. */
|
||
ptr += *ptr + 1;
|
||
if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
|
||
{
|
||
goto fail2;
|
||
}
|
||
|
||
/* skip zeros and logcommit id. */
|
||
ptr += 4 + 8;
|
||
if (ptr + 16 >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
|
||
{
|
||
goto fail2;
|
||
}
|
||
part.start = read_int (ptr, 8);
|
||
start = read_int (ptr + 8, 8);
|
||
ptr += 16;
|
||
if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic)
|
||
|| ptr + *ptr + 1 >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
|
||
{
|
||
goto fail2;
|
||
}
|
||
size = read_int (ptr + 1, *ptr);
|
||
ptr += *ptr + 1;
|
||
if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic)
|
||
|| ptr + *ptr + 1 >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
|
||
{
|
||
goto fail2;
|
||
}
|
||
|
||
for (comp = vg->lvs; comp; comp = comp->next)
|
||
if (comp->internal_id[0] == ptr[0]
|
||
&& grub_memcmp (ptr + 1, comp->internal_id + 1,
|
||
comp->internal_id[0]) == 0)
|
||
goto out;
|
||
continue;
|
||
out:
|
||
if (ptr >= vblk[i].dynamic + sizeof (vblk[i].dynamic)
|
||
|| ptr + *ptr + 1 >= vblk[i].dynamic + sizeof (vblk[i].dynamic))
|
||
{
|
||
goto fail2;
|
||
}
|
||
ptr += *ptr + 1;
|
||
struct grub_diskfilter_pv *pv;
|
||
for (pv = vg->pvs; pv; pv = pv->next)
|
||
if (pv->internal_id[0] == ptr[0]
|
||
&& grub_memcmp (pv->internal_id + 1, ptr + 1, ptr[0]) == 0)
|
||
part.pv = pv;
|
||
|
||
if (comp->segment_alloc == 1)
|
||
{
|
||
unsigned index;
|
||
ptr += *ptr + 1;
|
||
if (ptr + *ptr + 1 >= vblk[i].dynamic
|
||
+ sizeof (vblk[i].dynamic))
|
||
{
|
||
goto fail2;
|
||
}
|
||
index = read_int (ptr + 1, *ptr);
|
||
if (index < comp->segments->node_count)
|
||
comp->segments->nodes[index] = part;
|
||
}
|
||
else
|
||
{
|
||
if (comp->segment_alloc == comp->segment_count)
|
||
{
|
||
void *t;
|
||
comp->segment_alloc *= 2;
|
||
t = grub_realloc (comp->segments,
|
||
comp->segment_alloc
|
||
* sizeof (*comp->segments));
|
||
if (!t)
|
||
goto fail2;
|
||
comp->segments = t;
|
||
}
|
||
comp->segments[comp->segment_count].start_extent = start;
|
||
comp->segments[comp->segment_count].extent_count = size;
|
||
comp->segments[comp->segment_count].type = GRUB_DISKFILTER_STRIPED;
|
||
comp->segments[comp->segment_count].node_count = 1;
|
||
comp->segments[comp->segment_count].node_alloc = 1;
|
||
comp->segments[comp->segment_count].nodes
|
||
= grub_malloc (sizeof (*comp->segments[comp->segment_count].nodes));
|
||
if (!comp->segments[comp->segment_count].nodes)
|
||
goto fail2;
|
||
comp->segments[comp->segment_count].nodes[0] = part;
|
||
comp->segment_count++;
|
||
}
|
||
}
|
||
}
|
||
if (grub_diskfilter_vg_register (vg))
|
||
goto fail2;
|
||
return vg;
|
||
fail2:
|
||
{
|
||
struct grub_diskfilter_lv *lv, *next_lv;
|
||
struct grub_diskfilter_pv *pv, *next_pv;
|
||
for (lv = vg->lvs; lv; lv = next_lv)
|
||
{
|
||
unsigned i;
|
||
for (i = 0; i < lv->segment_count; i++)
|
||
grub_free (lv->segments[i].nodes);
|
||
|
||
next_lv = lv->next;
|
||
grub_free (lv->segments);
|
||
grub_free (lv->internal_id);
|
||
grub_free (lv->name);
|
||
grub_free (lv->fullname);
|
||
grub_free (lv);
|
||
}
|
||
for (pv = vg->pvs; pv; pv = next_pv)
|
||
{
|
||
next_pv = pv->next;
|
||
grub_free (pv->id.uuid);
|
||
grub_free (pv);
|
||
}
|
||
}
|
||
grub_free (vg->uuid);
|
||
grub_free (vg);
|
||
return NULL;
|
||
}
|
||
|
||
static struct grub_diskfilter_vg *
|
||
grub_ldm_detect (grub_disk_t disk,
|
||
struct grub_diskfilter_pv_id *id,
|
||
grub_disk_addr_t *start_sector)
|
||
{
|
||
grub_err_t err;
|
||
struct grub_ldm_label label;
|
||
struct grub_diskfilter_vg *vg;
|
||
|
||
#ifdef GRUB_UTIL
|
||
grub_util_info ("scanning %s for LDM", disk->name);
|
||
#endif
|
||
|
||
{
|
||
int i;
|
||
for (i = 0; i < 3; i++)
|
||
{
|
||
grub_disk_addr_t sector = LDM_LABEL_SECTOR;
|
||
switch (i)
|
||
{
|
||
case 0:
|
||
sector = LDM_LABEL_SECTOR;
|
||
break;
|
||
case 1:
|
||
/* LDM is never inside a partition. */
|
||
if (disk->partition)
|
||
continue;
|
||
sector = grub_disk_get_size (disk);
|
||
if (sector == GRUB_DISK_SIZE_UNKNOWN)
|
||
continue;
|
||
sector--;
|
||
break;
|
||
/* FIXME: try the third copy. */
|
||
case 2:
|
||
sector = gpt_ldm_sector (disk);
|
||
if (!sector)
|
||
continue;
|
||
break;
|
||
}
|
||
err = grub_disk_read (disk, sector, 0,
|
||
sizeof(label), &label);
|
||
if (err)
|
||
return NULL;
|
||
if (grub_memcmp (label.magic, LDM_MAGIC, sizeof (label.magic)) == 0
|
||
&& grub_be_to_cpu16 (label.ver_major) == 0x02
|
||
&& grub_be_to_cpu16 (label.ver_minor) >= 0x0b
|
||
&& grub_be_to_cpu16 (label.ver_minor) <= 0x0c)
|
||
break;
|
||
}
|
||
|
||
/* Return if we didn't find a label. */
|
||
if (i == 3)
|
||
{
|
||
#ifdef GRUB_UTIL
|
||
grub_util_info ("no LDM signature found");
|
||
#endif
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
id->uuid = grub_malloc (LDM_GUID_STRLEN + 1);
|
||
if (!id->uuid)
|
||
return NULL;
|
||
grub_memcpy (id->uuid, label.disk_guid, LDM_GUID_STRLEN);
|
||
id->uuid[LDM_GUID_STRLEN] = 0;
|
||
id->uuidlen = grub_strlen ((char *) id->uuid);
|
||
*start_sector = grub_be_to_cpu64 (label.pv_start);
|
||
|
||
{
|
||
grub_size_t s;
|
||
for (s = 0; s < LDM_GUID_STRLEN && label.group_guid[s]; s++);
|
||
vg = grub_diskfilter_get_vg_by_uuid (s, label.group_guid);
|
||
if (! vg)
|
||
vg = make_vg (disk, &label);
|
||
}
|
||
|
||
if (!vg)
|
||
{
|
||
grub_free (id->uuid);
|
||
return NULL;
|
||
}
|
||
return vg;
|
||
}
|
||
|
||
#ifdef GRUB_UTIL
|
||
|
||
char *
|
||
grub_util_get_ldm (grub_disk_t disk, grub_disk_addr_t start)
|
||
{
|
||
struct grub_diskfilter_pv *pv = NULL;
|
||
struct grub_diskfilter_vg *vg = NULL;
|
||
struct grub_diskfilter_lv *res = 0, *lv, *res_lv = 0;
|
||
|
||
pv = grub_diskfilter_get_pv_from_disk (disk, &vg);
|
||
|
||
if (!pv)
|
||
return NULL;
|
||
|
||
for (lv = vg->lvs; lv; lv = lv->next)
|
||
if (lv->segment_count == 1 && lv->segments->node_count == 1
|
||
&& lv->segments->type == GRUB_DISKFILTER_STRIPED
|
||
&& lv->segments->nodes->pv == pv
|
||
&& lv->segments->nodes->start + pv->start_sector == start)
|
||
{
|
||
res_lv = lv;
|
||
break;
|
||
}
|
||
if (!res_lv)
|
||
return NULL;
|
||
for (lv = vg->lvs; lv; lv = lv->next)
|
||
if (lv->segment_count == 1 && lv->segments->node_count == 1
|
||
&& lv->segments->type == GRUB_DISKFILTER_MIRROR
|
||
&& lv->segments->nodes->lv == res_lv)
|
||
{
|
||
res = lv;
|
||
break;
|
||
}
|
||
if (res && res->fullname)
|
||
return grub_strdup (res->fullname);
|
||
return NULL;
|
||
}
|
||
|
||
int
|
||
grub_util_is_ldm (grub_disk_t disk)
|
||
{
|
||
int i;
|
||
for (i = 0; i < 3; i++)
|
||
{
|
||
grub_disk_addr_t sector = LDM_LABEL_SECTOR;
|
||
grub_err_t err;
|
||
struct grub_ldm_label label;
|
||
|
||
switch (i)
|
||
{
|
||
case 0:
|
||
sector = LDM_LABEL_SECTOR;
|
||
break;
|
||
case 1:
|
||
/* LDM is never inside a partition. */
|
||
if (disk->partition)
|
||
continue;
|
||
sector = grub_disk_get_size (disk);
|
||
if (sector == GRUB_DISK_SIZE_UNKNOWN)
|
||
continue;
|
||
sector--;
|
||
break;
|
||
/* FIXME: try the third copy. */
|
||
case 2:
|
||
sector = gpt_ldm_sector (disk);
|
||
if (!sector)
|
||
continue;
|
||
break;
|
||
}
|
||
err = grub_disk_read (disk, sector, 0, sizeof(label), &label);
|
||
if (err)
|
||
{
|
||
grub_errno = GRUB_ERR_NONE;
|
||
return 0;
|
||
}
|
||
/* This check is more relaxed on purpose. */
|
||
if (grub_memcmp (label.magic, LDM_MAGIC, sizeof (label.magic)) == 0)
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
grub_err_t
|
||
grub_util_ldm_embed (struct grub_disk *disk, unsigned int *nsectors,
|
||
unsigned int max_nsectors,
|
||
grub_embed_type_t embed_type,
|
||
grub_disk_addr_t **sectors)
|
||
{
|
||
struct grub_diskfilter_pv *pv = NULL;
|
||
struct grub_diskfilter_vg *vg;
|
||
struct grub_diskfilter_lv *lv;
|
||
unsigned i;
|
||
|
||
if (embed_type != GRUB_EMBED_PCBIOS)
|
||
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
|
||
"LDM curently supports only PC-BIOS embedding");
|
||
if (disk->partition)
|
||
return grub_error (GRUB_ERR_BUG, "disk isn't LDM");
|
||
pv = grub_diskfilter_get_pv_from_disk (disk, &vg);
|
||
if (!pv)
|
||
return grub_error (GRUB_ERR_BUG, "disk isn't LDM");
|
||
for (lv = vg->lvs; lv; lv = lv->next)
|
||
{
|
||
struct grub_diskfilter_lv *comp;
|
||
|
||
if (!lv->visible || !lv->fullname)
|
||
continue;
|
||
|
||
if (lv->segment_count != 1)
|
||
continue;
|
||
if (lv->segments->type != GRUB_DISKFILTER_MIRROR
|
||
|| lv->segments->node_count != 1
|
||
|| lv->segments->start_extent != 0
|
||
|| lv->segments->extent_count != lv->size)
|
||
continue;
|
||
|
||
comp = lv->segments->nodes->lv;
|
||
if (!comp)
|
||
continue;
|
||
|
||
if (comp->segment_count != 1 || comp->size != lv->size)
|
||
continue;
|
||
if (comp->segments->type != GRUB_DISKFILTER_STRIPED
|
||
|| comp->segments->node_count != 1
|
||
|| comp->segments->start_extent != 0
|
||
|| comp->segments->extent_count != lv->size)
|
||
continue;
|
||
|
||
/* How to implement proper check is to be discussed. */
|
||
#if 1
|
||
if (1)
|
||
continue;
|
||
#else
|
||
if (grub_strcmp (lv->name, "Volume5") != 0)
|
||
continue;
|
||
#endif
|
||
if (lv->size < *nsectors)
|
||
return grub_error (GRUB_ERR_OUT_OF_RANGE,
|
||
/* TRANSLATORS: it's a partition for embedding,
|
||
not a partition embed into something. */
|
||
N_("your LDM embedding Partition is too small;"
|
||
" embedding won't be possible"));
|
||
*nsectors = lv->size;
|
||
if (*nsectors > max_nsectors)
|
||
*nsectors = max_nsectors;
|
||
*sectors = grub_malloc (*nsectors * sizeof (**sectors));
|
||
if (!*sectors)
|
||
return grub_errno;
|
||
for (i = 0; i < *nsectors; i++)
|
||
(*sectors)[i] = (lv->segments->nodes->start
|
||
+ comp->segments->nodes->start
|
||
+ comp->segments->nodes->pv->start_sector + i);
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
return grub_error (GRUB_ERR_FILE_NOT_FOUND,
|
||
/* TRANSLATORS: it's a partition for embedding,
|
||
not a partition embed into something. */
|
||
N_("this LDM has no Embedding Partition;"
|
||
" embedding won't be possible"));
|
||
}
|
||
#endif
|
||
|
||
static struct grub_diskfilter grub_ldm_dev = {
|
||
.name = "ldm",
|
||
.detect = grub_ldm_detect,
|
||
.next = 0
|
||
};
|
||
|
||
GRUB_MOD_INIT (ldm)
|
||
{
|
||
grub_diskfilter_register (&grub_ldm_dev);
|
||
}
|
||
|
||
GRUB_MOD_FINI (ldm)
|
||
{
|
||
grub_diskfilter_unregister (&grub_ldm_dev);
|
||
}
|