Re: [PATCH 0/5] btrfs-find-root enhancement for chunk tree corrupted fs

[Qu Wenruo <quwenruo@cn.fujitsu.com>]

This patchset can also be fetched from github:
https://github.com/adam900710/btrfs-progs.git syschunk_find_root_20160222

Thanks,
Qu

Qu Wenruo wrote on 2016/02/22 14:59 +0800:
> Before this patchset, btrfs-find-root needs valid chunk tree from the
> fs.
> However for chunk root corrupted case, btrfs-find-root is of no use due
> to above limitation.
>
> This patchset will allow open_ctree_fs_info() to return a fs_info
> without any valid tree root, but system chunk map from superblock only.
> And modify btrfs-find-root along with some infrastructure to do chunk
> root search.
>
> Also fix an old bug where btrfs-find-root will always skip the first
> chunk, with its corresponding regression test.
>
> This also provides the basis for later "btrfsck --chunk-root" and faster
> chunk-recovery enhancement.
>
> Qu Wenruo (5):
>    btrfs: volume: Fix a bug causing btrfs-find-root to skip first chunk
>    btrfs: Allow open_ctree to return fs_info even chunk tree is corrupted
>    btrfs: Add support for tree block operations on fs_info without roots.
>    btrfs: find-root: Allow btrfs-find-root to search chunk root even
>      chunk     root is corrupted
>    btrfs: misc-test: Add regression test for find-root gives empty result
>
>   btrfs-corrupt-block.c                              |   2 +-
>   btrfs-find-root.c                                  |  17 ++--
>   ctree.h                                            |   1 +
>   disk-io.c                                          |  99 +++++++++++++--------
>   disk-io.h                                          |  35 ++++++--
>   extent-tree.c                                      |   3 +-
>   find-root.c                                        |  10 +--
>   find-root.h                                        |   2 +-
>   .../first_meta_chunk.btrfs-image                   | Bin 0 -> 4096 bytes
>   tests/misc-tests/012-find-root-no-result/test.sh   |  20 +++++
>   volumes.c                                          |  20 +++--
>   11 files changed, 147 insertions(+), 62 deletions(-)
>   create mode 100644 tests/misc-tests/012-find-root-no-result/first_meta_chunk.btrfs-image
>   create mode 100644 tests/misc-tests/012-find-root-no-result/test.sh
>