Op 24-09-2019 om 10:11 schreef Qu Wenruo:
We have at least two user reports about bad inode generation makes
kernel reject the fs.
May I add my report? I just upgraded Ubuntu from 19.04 -> 19.10 so
kernel went from 5.0 -> 5.3 (but I was using 4.15 too).
Booting 5.3 leaves me in initramfs as I have /boot on @boot and / on /@
In initramfs I can try to mount but get something like
btrfs critical corrupt leaf invalid inode generation open_ctree failed
Booting old kernel works just as before, no errors.
According to the creation time, the inode is created by some 2014
kernel.
How do I get the creation time?
And the generation member of INODE_ITEM is not updated (unlike the
transid member) so the error persists until latest tree-checker detects.
Even the situation can be fixed by reverting back to older kernel and
copying the offending dir/file to another inode and delete the offending
one, it still should be done by btrfs-progs.
How to find the offending dir/file from the command line manually?
This patchset adds such check and repair ability to btrfs-check, with a
simple test image.
Qu Wenruo (3):
btrfs-progs: check/lowmem: Add check and repair for invalid inode
generation
btrfs-progs: check/original: Add check and repair for invalid inode
generation
btrfs-progs: fsck-tests: Add test image for invalid inode generation
repair
check/main.c | 50 +++++++++++-
check/mode-lowmem.c | 76 ++++++++++++++++++
check/mode-original.h | 1 +
.../.lowmem_repairable | 0
.../bad_inode_geneartion.img.xz | Bin 0 -> 2012 bytes
5 files changed, 126 insertions(+), 1 deletion(-)
create mode 100644 tests/fsck-tests/043-bad-inode-generation/.lowmem_repairable
create mode 100644 tests/fsck-tests/043-bad-inode-generation/bad_inode_geneartion.img.xz
