| /* |
| * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved. |
| * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
| * |
| * This file is part of LVM2. |
| * |
| * This copyrighted material is made available to anyone wishing to use, |
| * modify, copy, or redistribute it subject to the terms and conditions |
| * of the GNU Lesser General Public License v.2.1. |
| * |
| * You should have received a copy of the GNU Lesser General Public License |
| * along with this program; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifndef _LVM_TEXT_LAYOUT_H |
| #define _LVM_TEXT_LAYOUT_H |
| |
| #include "config.h" |
| #include "metadata.h" |
| #include "lvmcache.h" |
| #include "uuid.h" |
| |
| /* disk_locn and data_area_list are defined in format-text.h */ |
| |
| /* |
| * PV header extension versions: |
| * - version 1: bootloader area support |
| * - version 2: PV_EXT_USED flag support |
| */ |
| #define PV_HEADER_EXTENSION_VSN 2 |
| |
| struct pv_header_extension { |
| uint32_t version; |
| uint32_t flags; |
| /* NULL-terminated list of bootloader areas */ |
| struct disk_locn bootloader_areas_xl[0]; |
| } __attribute__ ((packed)); |
| |
| /* Fields with the suffix _xl should be xlate'd wherever they appear */ |
| /* On disk */ |
| struct pv_header { |
| int8_t pv_uuid[ID_LEN]; |
| |
| /* This size can be overridden if PV belongs to a VG */ |
| uint64_t device_size_xl; /* Bytes */ |
| |
| /* NULL-terminated list of data areas followed by */ |
| /* NULL-terminated list of metadata area headers */ |
| struct disk_locn disk_areas_xl[0]; /* Two lists */ |
| } __attribute__ ((packed)); |
| |
| /* |
| * Ignore this raw location. This allows us to |
| * ignored metadata areas easily, and thus balance |
| * metadata across VGs with many PVs. |
| */ |
| #define RAW_LOCN_IGNORED 0x00000001 |
| |
| /* On disk */ |
| struct raw_locn { |
| uint64_t offset; /* Offset in bytes to start sector */ |
| uint64_t size; /* Bytes */ |
| uint32_t checksum; |
| uint32_t flags; |
| } __attribute__ ((packed)); |
| |
| int rlocn_is_ignored(const struct raw_locn *rlocn); |
| void rlocn_set_ignored(struct raw_locn *rlocn, unsigned mda_ignored); |
| |
| /* On disk */ |
| /* Structure size limited to one sector */ |
| struct mda_header { |
| uint32_t checksum_xl; /* Checksum of rest of mda_header */ |
| int8_t magic[16]; /* To aid scans for metadata */ |
| uint32_t version; |
| uint64_t start; /* Absolute start byte of mda_header */ |
| uint64_t size; /* Size of metadata area */ |
| |
| struct raw_locn raw_locns[0]; /* NULL-terminated list */ |
| } __attribute__ ((packed)); |
| |
| struct mda_header *raw_read_mda_header(const struct format_type *fmt, |
| struct device_area *dev_area); |
| |
| struct mda_lists { |
| struct dm_list dirs; |
| struct dm_list raws; |
| struct metadata_area_ops *file_ops; |
| struct metadata_area_ops *raw_ops; |
| }; |
| |
| struct mda_context { |
| struct device_area area; |
| uint64_t free_sectors; |
| struct raw_locn rlocn; /* Store inbetween write and commit */ |
| }; |
| |
| /* FIXME Convert this at runtime */ |
| #define FMTT_MAGIC "\040\114\126\115\062\040\170\133\065\101\045\162\060\116\052\076" |
| #define FMTT_VERSION 1 |
| #define MDA_HEADER_SIZE 512 |
| #define LVM2_LABEL "LVM2 001" |
| #define MDA_SIZE_MIN (8 * (unsigned) lvm_getpagesize()) |
| |
| int vgname_from_mda(const struct format_type *fmt, struct mda_header *mdah, |
| struct device_area *dev_area, struct lvmcache_vgsummary *vgsummary, |
| uint64_t *mda_free_sectors); |
| |
| #endif |