Patchset can be fetched from github:
https://github.com/adam900710/linux/tree/write_time_tree_checker
Which is based on v5.0-rc1 tag.
This patchset has the following two features:
- Tree block validation output enhancement
* Output validation failure timing (write time or read time)
* Always output tree block level/key mismatch error message
This part is already submitted and reviewed.
- Write time tree block validation check
To catch memory corruption either from hardware or kernel.
Example output would be:
BTRFS critical (device dm-3): corrupt leaf: root=2 block=1350630375424
slot=68, bad key order, prev (10510212874240 169 0) current (1714119868416 169
0)
BTRFS error (device dm-3): write time tree block corruption detected
BTRFS: error (device dm-3) in btrfs_commit_transaction:2220: errno=-5 IO
failure (Error while writing out transaction)
BTRFS info (device dm-3): forced readonly
BTRFS warning (device dm-3): Skipping commit of aborted transaction.
BTRFS: error (device dm-3) in cleanup_transaction:1839: errno=-5 IO failure
BTRFS info (device dm-3): delayed_refs has NO entry
Changelog:
v2:
- Unlock locked pages in lock_extent_buffer_for_io() for error handling.
- Added Reviewed-by tags.
v3:
- Remove duplicated error message.
- Use IS_ENABLED() macro to replace #ifdef.
- Added Reviewed-by tags.
v4:
- Re-organized patch split
Now each BUG_ON() cleanup has its own patch
- Dig much further into the call sites to eliminate unexpected >0 return
May be a little paranoid and abuse some ASSERT(), but it should be
much safer against further code change.
- Fix the false alert caused by balance and memory pressure
The fix it skip owner checker for non-essential tree at write time.
Since owner root can't always be reliable, either due to commit root
created in current transaction or balance + memory pressure.
Qu Wenruo (12):
btrfs: Always output error message when key/level verification fails
btrfs: extent_io: Kill the forward declaration of flush_write_bio()
btrfs: disk-io: Show the timing of corrupted tree block explicitly
btrfs: extent_io: Move the BUG_ON() in flush_write_bio() one level up
btrfs: extent_io: Kill the BUG_ON() in extent_write_full_page()
btrfs: extent_io: Kill the BUG_ON() in btree_write_cache_pages()
btrfs: extent_io: Kill the dead branch in extent_write_cache_pages()
btrfs: extent_io: Kill the BUG_ON() in extent_write_locked_range()
btrfs: extent_io: Kill the BUG_ON() in lock_extent_buffer_for_io()
btrfs: extent_io: Kill the BUG_ON() in extent_write_cache_pages()
btrfs: extent_io: Kill the BUG_ON() in extent_writepages()
btrfs: Do mandatory tree block check before submitting bio
fs/btrfs/disk-io.c | 21 ++++--
fs/btrfs/extent_io.c | 154 ++++++++++++++++++++++++++--------------
fs/btrfs/tree-checker.c | 24 ++++++-
fs/btrfs/tree-checker.h | 8 +++
4 files changed, 144 insertions(+), 63 deletions(-)
--
2.20.1
