kernel/fs/bcachefs/backpointers.h, branch linux-rolling-stable

Remove bcachefs core code

2025-09-29T20:43:52Z

bcachefs was marked 'externally maintained' in 6.17 but the code remained to make the transition smoother. It's now a DKMS module, making the in-kernel code stale, so remove it to avoid any version confusion. Link: https://lore.kernel.org/linux-bcachefs/yokpt2d2g2lluyomtqrdvmkl3amv3kgnipmenobkpgx537kay7@xgcgjviv3n7x/T/ Signed-off-by: Linus Torvalds

bcachefs: bch_err_throw()

2025-06-02T16:16:35Z

Add a tracepoint for any time we return an error and unwind. Signed-off-by: Kent Overstreet

bcachefs: Replace rcu_read_lock() with guards

2025-06-01T04:03:12Z

The new guard(), scoped_guard() allow for more natural code. Some of the uses with creative flow control have been left. Signed-off-by: Kent Overstreet

bcachefs: bch2_check_bucket_backpointer_mismatch()

2025-05-22T00:15:04Z

Detect buckets with missing backpointers, and run repair on demand. __bch2_move_data_phys() now calls bch2_check_bucket_backpointer_mismatch() as it walks buckets, which checks for missing backpointers by comparing backpointers against bucket sector counts. When missing backpointers are detected, we kick off bch2_check_extents_to_backpointers() asynchronously - right away if we're trying to evacuate, or with a threshold if we're just running copygc. Signed-off-by: Kent Overstreet

bcachefs: Improve bucket_bitmap code

2025-05-22T00:15:04Z

Add some more helpers, and mismatches is now a superset of the empty bitmap - simplifies most checks. Signed-off-by: Kent Overstreet

bcachefs: Debug params are now static_keys

2025-05-22T00:14:54Z

We'd like users to be able to debug without building custom kernels, so this will help us get rid of CONFIG_BCACHEFS_DEBUG, at least for most things. Signed-off-by: Kent Overstreet

bcachefs: "buckets with backpointer mismatches" now allocated on demand

2025-05-22T00:14:52Z

More self healing work: we're going to be calling check_bucket_backpointer_mismatch() at runtime, outside of fsck. Then when we need to we'll kick off the full check_extents_to_backpointers recovery pass. Signed-off-by: Kent Overstreet

bcachefs: bcachefs_metadata_version_stripe_backpointers

2025-03-15T01:02:15Z

Stripes now have backpointers. This is needed for proper scrub - stripe checksums need to be verified, separately from extents within the stripe, since a block may not be full of live extents but it's still needed for reconstruct. And this will be needed for (efficient) evacuate/repair paths. Signed-off-by: Kent Overstreet

bcachefs: bch2_bkey_ptr_data_type() now correctly returns cached for cached ptrs

2025-03-15T01:02:13Z

Necessary for adding backpointers for cached pointers. Signed-off-by: Kent Overstreet

bcachefs: Factor out progress.[ch]

2025-03-15T01:02:12Z

the backpointers code has progress indicators; these aren't great, since they print to the dmesg console and we much prefer to have progress indicators reporting to a specific userspace program so they're not spamming the system console. But not all codepaths that need progress indicators support that yet, and we don't want users to think "this is hung". Signed-off-by: Kent Overstreet