/* * volume_id - reads filesystem label and uuid * * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "volume_id_internal.h" struct mdp_super_block { uint32_t md_magic; uint32_t major_version; uint32_t minor_version; uint32_t patch_version; uint32_t gvalid_words; uint32_t set_uuid0; uint32_t ctime; uint32_t level; uint32_t size; uint32_t nr_disks; uint32_t raid_disks; uint32_t md_minor; uint32_t not_persistent; uint32_t set_uuid1; uint32_t set_uuid2; uint32_t set_uuid3; } __attribute__((packed)); #define MD_RESERVED_BYTES 0x10000 #define MD_MAGIC 0xa92b4efc int volume_id_probe_linux_raid(struct volume_id *id /*,uint64_t off*/, uint64_t size) { #define off ((uint64_t)0) uint64_t sboff; uint8_t uuid[16]; struct mdp_super_block *mdp; dbg("probing at offset 0x%llx, size 0x%llx", (unsigned long long) off, (unsigned long long) size); if (size < 0x10000) return -1; sboff = (size & ~(MD_RESERVED_BYTES - 1)) - MD_RESERVED_BYTES; mdp = volume_id_get_buffer(id, off + sboff, 0x800); if (mdp == NULL) return -1; if (mdp->md_magic != cpu_to_le32(MD_MAGIC)) return -1; *(uint32_t*)uuid = mdp->set_uuid0; memcpy(&uuid[4], &mdp->set_uuid1, 12); volume_id_set_uuid(id, uuid, UUID_DCE); // snprintf(id->type_version, sizeof(id->type_version)-1, "%u.%u.%u", // le32_to_cpu(mdp->major_version), // le32_to_cpu(mdp->minor_version), // le32_to_cpu(mdp->patch_version)); dbg("found raid signature"); // volume_id_set_usage(id, VOLUME_ID_RAID); // id->type = "linux_raid_member"; return 0; }