On 17.10.2017 12:13, Qu Wenruo wrote: > 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) kernel refuse to mount some fs, due to mismatched super total_bytes > Unmountable if super total_bytes is smaller than total rw bytes of > all devices. > Root cause seems to be that, at least for kernel v4.13, some > device resize/add operation on unaligned device can lead to super > size out of sync with device size. > And normally this will cause super size to be 1 page (4096) smaller > than all devices' size. > > 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 is causing harmless but annoying kernel warnning. > > It can be fixed online with "btrfs filesystem resize". > > This patchset also provide a fallback method to fix it. > > Finally, fix a typo which makes "btrfs rescue zero-log" to continue > execution even the fs is mounted and error message outputted. > > Changelog: > v2: > Move the command line tool from "btrfs check" to "btrfs rescue", > suggested by David. Although fsck can still repair/detect it. > Function naming change for cmds-check.c part, suggested by Nikolay. > Remove inaccurate kernel version, suggested by Nikolay. > Fix a bug when coding in cmds-rescue.c. > Split the first patch to make review easier. > For the whole series: Reviewed-by: Nikolay Borisov <nborisov@xxxxxxxx> > Qu Wenruo (6): > btrfs-progs: Introduce function to fix unaligned device size > btrfs-progs: Introduce function to fix super block total bytes > btrfs-progs: rescue: Introduce fix-device-size > btrfs-progs: check: Also check and repair unalignment/mismatch device > and super size > btrfs-progs: test/fsck: Add test case image for --fix-dev-size > btrfs-progs: rescue: Fix zero-log mounted branch > > Documentation/btrfs-rescue.asciidoc | 29 ++++ > cmds-check.c | 76 +++++++++ > cmds-rescue.c | 49 ++++++ > .../dev_and_super_mismatch_unaligned.raw.xz | Bin 0 -> 21536 bytes > volumes.c | 178 +++++++++++++++++++++ > volumes.h | 4 + > 6 files changed, 336 insertions(+) > create mode 100644 tests/fsck-tests/027-unaligned-super-dev-sizes/dev_and_super_mismatch_unaligned.raw.xz > -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
