diff options
author | David Sterba <dsterba@suse.com> | 2017-10-20 00:24:13 +0200 |
---|---|---|
committer | David Sterba <dsterba@suse.com> | 2017-11-14 15:59:00 +0100 |
commit | c76b05fba284c68c6cb7b710dbb95a42089e8538 (patch) | |
tree | da624a483b192f345498870b0cff2f6ab59b218b /image/metadump.h | |
parent | 9896b43f70df300feb792487f92b1b1ed87a49ce (diff) |
btrfs-progs: image: move metadump definitions to own header
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'image/metadump.h')
-rw-r--r-- | image/metadump.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/image/metadump.h b/image/metadump.h new file mode 100644 index 00000000..b9275e95 --- /dev/null +++ b/image/metadump.h @@ -0,0 +1,70 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * This program 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 + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + */ + +#ifndef __BTRFS_IMAGE_METADUMP_H__ +#define __BTRFS_IMAGE_METADUMP_H__ + +#include "kerncompat.h" +#include "kernel-lib/rbtree.h" +#include "kernel-lib/list.h" +#include "ctree.h" + +#define HEADER_MAGIC 0xbd5c25e27295668bULL +#define MAX_PENDING_SIZE (256 * 1024) +#define BLOCK_SIZE 1024 +#define BLOCK_MASK (BLOCK_SIZE - 1) + +#define ITEMS_PER_CLUSTER ((BLOCK_SIZE - sizeof(struct meta_cluster)) / \ + sizeof(struct meta_cluster_item)) + +#define COMPRESS_NONE 0 +#define COMPRESS_ZLIB 1 + +struct meta_cluster_item { + __le64 bytenr; + __le32 size; +} __attribute__ ((__packed__)); + +struct meta_cluster_header { + __le64 magic; + __le64 bytenr; + __le32 nritems; + u8 compress; +} __attribute__ ((__packed__)); + +/* cluster header + index items + buffers */ +struct meta_cluster { + struct meta_cluster_header header; + struct meta_cluster_item items[]; +} __attribute__ ((__packed__)); + +struct fs_chunk { + u64 logical; + u64 physical; + /* + * physical_dup only store additonal physical for BTRFS_BLOCK_GROUP_DUP + * currently restore only support single and DUP + * TODO: modify this structure and the function related to this + * structure for support RAID* + */ + u64 physical_dup; + u64 bytes; + struct rb_node l; + struct rb_node p; + struct list_head list; +}; + +#endif |