| /* |
| * 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 |
| */ |
| |
| //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_LVM) += lvm.o |
| |
| //config:### config FEATURE_VOLUMEID_LVM |
| //config:### bool "lvm" |
| //config:### default y |
| //config:### depends on VOLUMEID |
| |
| #include "volume_id_internal.h" |
| |
| struct lvm1_super_block { |
| uint8_t id[2]; |
| } PACKED; |
| |
| struct lvm2_super_block { |
| uint8_t id[8]; |
| uint64_t sector_xl; |
| uint32_t crc_xl; |
| uint32_t offset_xl; |
| uint8_t type[8]; |
| } PACKED; |
| |
| #define LVM1_SB_OFF 0x400 |
| |
| int FAST_FUNC volume_id_probe_lvm1(struct volume_id *id, uint64_t off) |
| { |
| struct lvm1_super_block *lvm; |
| |
| dbg("probing at offset 0x%llx", (unsigned long long) off); |
| |
| lvm = volume_id_get_buffer(id, off + LVM1_SB_OFF, 0x800); |
| if (lvm == NULL) |
| return -1; |
| |
| if (lvm->id[0] != 'H' || lvm->id[1] != 'M') |
| return -1; |
| |
| // volume_id_set_usage(id, VOLUME_ID_RAID); |
| // id->type = "LVM1_member"; |
| |
| return 0; |
| } |
| |
| #define LVM2_LABEL_ID "LABELONE" |
| #define LVM2LABEL_SCAN_SECTORS 4 |
| |
| int FAST_FUNC volume_id_probe_lvm2(struct volume_id *id, uint64_t off) |
| { |
| const uint8_t *buf; |
| unsigned soff; |
| struct lvm2_super_block *lvm; |
| |
| dbg("probing at offset 0x%llx", (unsigned long long) off); |
| |
| buf = volume_id_get_buffer(id, off, LVM2LABEL_SCAN_SECTORS * 0x200); |
| if (buf == NULL) |
| return -1; |
| |
| |
| for (soff = 0; soff < LVM2LABEL_SCAN_SECTORS * 0x200; soff += 0x200) { |
| lvm = (struct lvm2_super_block *) &buf[soff]; |
| |
| if (memcmp(lvm->id, LVM2_LABEL_ID, 8) == 0) |
| goto found; |
| } |
| |
| return -1; |
| |
| found: |
| // memcpy(id->type_version, lvm->type, 8); |
| // volume_id_set_usage(id, VOLUME_ID_RAID); |
| // id->type = "LVM2_member"; |
| |
| return 0; |
| } |