diff options
| author | Miao Xie <miaox@cn.fujitsu.com> | 2013-07-03 21:25:17 +0800 |
|---|---|---|
| committer | Chris Mason <chris.mason@fusionio.com> | 2013-07-03 14:06:55 -0400 |
| commit | 30d5c8a49f088d76fb2806240393fc035ed75290 (patch) | |
| tree | f5a1652ad936c259f1cbc653a61384b3b2a31c2a /extent_io.h | |
| parent | 65534643f6e919c39f58bef31ebcffd48d8b1895 (diff) | |
Btrfs-progs: Add chunk recover function - using old chunk items
Add chunk-recover program to check or rebuild chunk tree when the system
chunk array or chunk tree is broken.
Due to the importance of the system chunk array and chunk tree, if one of
them is broken, the whole btrfs will be broken even other data are OK.
But we have some hint(fsid, checksum...) to salvage the old metadata.
So this function will first scan the whole file system and collect the
needed data(chunk/block group/dev extent), and check for the references
between them. If the references are OK, the chunk tree can be rebuilt and
luckily the file system will be mountable.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'extent_io.h')
| -rw-r--r-- | extent_io.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/extent_io.h b/extent_io.h index a0308a90..2f5ff023 100644 --- a/extent_io.h +++ b/extent_io.h @@ -41,6 +41,12 @@ #define EXTENT_CSUM (1 << 9) #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) +#define BLOCK_GROUP_DATA EXTENT_WRITEBACK +#define BLOCK_GROUP_METADATA EXTENT_UPTODATE +#define BLOCK_GROUP_SYSTEM EXTENT_NEW + +#define BLOCK_GROUP_DIRTY EXTENT_DIRTY + struct btrfs_fs_info; struct extent_io_tree { |