Entirely too many patches, but mostly check/repair, and related.
6.16 looks to be shaping up well, knock on wood.
The following changes since commit e04c78d86a9699d136910cfc0bdcf01087e3267e:
Linux 6.16-rc2 (2025-06-15 13:49:41 -0700)
are available in the Git repository at:
git://evilpiepirate.org/bcachefs.git tags/bcachefs-2025-06-19
for you to fetch changes up to b2e2bed119809a5ca384241e0631f04c6142ae08:
bcachefs: Add missing key type checks to check_snapshot_exists() (2025-06-19 14:37:04 -0400)
----------------------------------------------------------------
bcachefs fixes for 6.16-rc3
- Lots of small check/repair fixes, primarily in subvol loop and
directory structure loop (when involving snapshots).
- Fix a few 6.16 regressions: rare UAF in the foreground allocator path
when taking a transaction restart from the transaction bump allocator,
and some small fallout from the change to log the error being
corrected in the journal when repairing errors, also some fallout from
the btree node read error logging improvements.
(Alan, Bharadwaj)
- New option: journal_rewind
This lets the entire filesystem be reset to an earlier point in time.
Note that this is only a disaster recovery tool, and right now there
are major caveats to using it (discards should be disabled, in
particular), but it successfully restored the filesystem of one of the
users who was bit by the subvolume deletion bug and didn't have
backups. I'll likely be making some changes to the discard path in the
future to make this a reliable recovery tool.
- Some new btree iterator tracepoints, for tracking down some
livelock-ish behaviour we've been seeing in the main data write path.
----------------------------------------------------------------
Alan Huang (6):
bcachefs: Don't allocate new memory when mempool is exhausted
bcachefs: Fix alloc_req use after free
bcachefs: Add missing EBUG_ON
bcachefs: Delay calculation of trans->journal_u64s
bcachefs: Move bset size check before csum check
bcachefs: Fix pool->alloc NULL pointer dereference
Bharadwaj Raju (1):
bcachefs: don't return fsck_fix for unfixable node errors in __btree_err
Kent Overstreet (33):
bcachefs: trace_extent_trim_atomic
bcachefs: btree iter tracepoints
bcachefs: Fix bch2_journal_keys_peek_prev_min()
bcachefs: btree_iter: fix updates, journal overlay
bcachefs: better __bch2_snapshot_is_ancestor() assert
bcachefs: pass last_seq into fs_journal_start()
bcachefs: Fix "now allowing incompatible features" message
bcachefs: Fix snapshot_key_missing_inode_snapshot repair
bcachefs: fsck: fix add_inode()
bcachefs: fsck: fix extent past end of inode repair
bcachefs: opts.journal_rewind
bcachefs: Kill unused tracepoints
bcachefs: mark more errors autofix
bcachefs: fsck: Improve check_key_has_inode()
bcachefs: Call bch2_fs_init_rw() early if we'll be going rw
bcachefs: Fix __bch2_inum_to_path() when crossing subvol boundaries
bcachefs: fsck: Print path when we find a subvol loop
bcachefs: fsck: Fix remove_backpointer() for subvol roots
bcachefs: fsck: Fix reattach_inode() for subvol roots
bcachefs: fsck: check_directory_structure runs in reverse order
bcachefs: fsck: additional diagnostics for reattach_inode()
bcachefs: fsck: check_subdir_count logs path
bcachefs: fsck: Fix check_path_loop() + snapshots
bcachefs: Fix bch2_read_bio_to_text()
bcachefs: Fix restart handling in btree_node_scrub_work()
bcachefs: fsck: Fix check_directory_structure when no check_dirents
bcachefs: fsck: fix unhandled restart in topology repair
bcachefs: fsck: Fix oops in key_visible_in_snapshot()
bcachefs: fix spurious error in read_btree_roots()
bcachefs: Fix missing newlines before ero
bcachefs: Fix *__bch2_trans_subbuf_alloc() error path
bcachefs: Don't log fsck err in the journal if doing repair elsewhere
bcachefs: Add missing key type checks to check_snapshot_exists()
fs/bcachefs/alloc_background.c | 13 +-
fs/bcachefs/bcachefs.h | 3 +-
fs/bcachefs/btree_gc.c | 8 +-
fs/bcachefs/btree_io.c | 74 ++++----
fs/bcachefs/btree_iter.c | 173 ++++++++++++------
fs/bcachefs/btree_journal_iter.c | 64 ++++---
fs/bcachefs/btree_journal_iter_types.h | 5 +-
fs/bcachefs/btree_trans_commit.c | 18 +-
fs/bcachefs/btree_types.h | 1 +
fs/bcachefs/btree_update.c | 16 +-
fs/bcachefs/btree_update_interior.c | 11 +-
fs/bcachefs/btree_update_interior.h | 3 +
fs/bcachefs/btree_write_buffer.c | 3 +
fs/bcachefs/chardev.c | 29 ++-
fs/bcachefs/data_update.c | 1 +
fs/bcachefs/errcode.h | 5 -
fs/bcachefs/error.c | 4 +-
fs/bcachefs/extent_update.c | 13 +-
fs/bcachefs/fsck.c | 317 +++++++++++++++++++++++----------
fs/bcachefs/inode.h | 5 +
fs/bcachefs/io_read.c | 7 +-
fs/bcachefs/journal.c | 18 +-
fs/bcachefs/journal.h | 2 +-
fs/bcachefs/journal_io.c | 26 ++-
fs/bcachefs/namei.c | 30 +++-
fs/bcachefs/opts.h | 5 +
fs/bcachefs/recovery.c | 24 ++-
fs/bcachefs/recovery_passes.c | 6 +-
fs/bcachefs/recovery_passes.h | 9 +
fs/bcachefs/sb-errors_format.h | 17 +-
fs/bcachefs/snapshot.c | 14 +-
fs/bcachefs/super.c | 13 +-
fs/bcachefs/super.h | 1 +
fs/bcachefs/trace.h | 125 +++----------
34 files changed, 657 insertions(+), 406 deletions(-)
