71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program 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 GNU
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* 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
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef __BTRFS_IMAGE_METADUMP_H__
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#define __BTRFS_IMAGE_METADUMP_H__
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#include "kerncompat.h"
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#include "kernel-lib/rbtree.h"
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#include "kernel-lib/list.h"
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#include "ctree.h"
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#define HEADER_MAGIC 0xbd5c25e27295668bULL
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#define MAX_PENDING_SIZE (256 * 1024)
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#define BLOCK_SIZE 1024
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#define BLOCK_MASK (BLOCK_SIZE - 1)
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#define ITEMS_PER_CLUSTER ((BLOCK_SIZE - sizeof(struct meta_cluster)) / \
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sizeof(struct meta_cluster_item))
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#define COMPRESS_NONE 0
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#define COMPRESS_ZLIB 1
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struct meta_cluster_item {
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__le64 bytenr;
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__le32 size;
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} __attribute__ ((__packed__));
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struct meta_cluster_header {
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__le64 magic;
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__le64 bytenr;
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__le32 nritems;
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u8 compress;
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} __attribute__ ((__packed__));
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/* cluster header + index items + buffers */
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struct meta_cluster {
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struct meta_cluster_header header;
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struct meta_cluster_item items[];
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} __attribute__ ((__packed__));
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struct fs_chunk {
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u64 logical;
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u64 physical;
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/*
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* physical_dup only store additonal physical for BTRFS_BLOCK_GROUP_DUP
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* currently restore only support single and DUP
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* TODO: modify this structure and the function related to this
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* structure for support RAID*
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*/
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u64 physical_dup;
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u64 bytes;
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struct rb_node l;
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struct rb_node p;
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struct list_head list;
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};
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#endif
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