The patchset can be fetched from github:
https://github.com/adam900710/btrfs-progs/tree/check_unaligned_dev
There are several reports in mail list for btrfs device size related
problems.
1) Unmountable fs, due to mismatched super total_bytes
Unmountable if super total_bytes is smaller than total rw bytes of
all devices.
Root cause under investigation, but only one report here.
This patchset provides the tool to fix it offline.
(At least better than unmountable forever)
2) Harmless kernel warning for btrfs_update_device()
v4.14 introduced restrict device size checker.
This somewhat break the backward compatibility and causing kernel
warning.
It can be fixed online with "btrfs filesystem resize".
(Although it is better to fixed it at mount time)
This patchset also provide a fallback method to fix it.
Qu Wenruo (4):
btrfs-progs: Introduce functions to repair unaligned/mismatch device
size
btrfs-progs: fsck: Introduce --fix-dev-size option
btrfs-progs: check: Also check unalignment/mismatch device and super
size
btrfs-progs: test/fsck: Add test case image for --fix-dev-size
Qu Wenruo (4):
btrfs-progs: Introduce functions to repair unaligned/mismatch device
size
btrfs-progs: fsck: Introduce --fix-dev-size option
btrfs-progs: check: Also check unalignment/mismatch device and super
size
btrfs-progs: test/fsck: Add test case image for --fix-dev-size
Documentation/btrfs-check.asciidoc | 23 ++
cmds-check.c | 292 ++++++++++++++++++++-
.../dev_and_super_mismatch_unaligned.raw.xz | Bin 0 -> 21536 bytes
3 files changed, 314 insertions(+), 1 deletion(-)
create mode 100644
tests/fsck-tests/027-unaligned-super-dev-sizes/dev_and_super_mismatch_unaligned.raw.xz
--
2.14.2
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