This patchset can be fetched from github:
https://github.com/adam900710/btrfs-progs/tree/image_recover
The base commit is as usual, the latest stable tag, v4.19.
Test case misc/021 will fail if using latest upstream kernel.
This is due to the enhanced code in kernel to check block group <->
chunk <-> dev extent mapping.
This means from the very beginning, btrfs-image can't really restore a
multi-disk image to single-disk one correctly.
The problem is, although we modified chunk item, we didn't modify block
group item's flags or dev extents.
This patch will reset block group flags, then rebuild the whole
dev extents by removing existing ones first, then re-add the correct
dev extents calculated from chunk map.
Now it could pass all misc tests and fsck tests.
Qu Wenruo (5):
btrfs-progs: image: Refactor fixup_devices() to
fixup_chunks_and_devices()
btrfs-progs: image: Fix block group item flags when restoring
multi-device image to single device
btrfs-progs: image: Remove all existing dev extents for later rebuild
btrfs-progs: image: Rebuild dev extents using chunk tree
btrfs-progs: misc-tests/021: Do extra btrfs check before mounting
image/main.c | 201 ++++++++++++++++--
.../021-image-multi-devices/test.sh | 3 +
volumes.c | 10 +-
volumes.h | 4 +
4 files changed, 197 insertions(+), 21 deletions(-)
--
2.19.2
