kernel.git/fs/bcachefs/alloc_background.c, branch linux-6.15.y

bcachefs: Fix null ptr deref in invalidate_one_bucket()

2025-04-03T16:11:43Z

bch2_backpointer_get_key() returns bkey_s_c_null when the target isn't found. backpointer_get_key() flags the error, so there's nothing else to do here - just skip it and move on. Link: https://github.com/koverstreet/bcachefs/issues/847 Signed-off-by: Kent Overstreet

bcachefs: Kill btree_iter.trans

2025-04-02T14:24:34Z

This was planned to be done ages ago, now finally completed; there are places where we have quite a few btree_trans objects on the stack, so this reduces stack usage somewhat. Signed-off-by: Kent Overstreet

bcachefs: Split up bch_dev.io_ref

2025-04-02T14:24:34Z

We now have separate per device io_refs for read and write access. This fixes a device removal bug where the discard workers were still running while we're removing alloc info for that device. It's also a bit of hardening; we no longer allow writes to devices that are read-only. Signed-off-by: Kent Overstreet

bcachefs: Consistent indentation of multiline fsck errors

2025-03-29T02:31:47Z

Add the new helper printbuf_indent_add_nextline(), and use it in __bch2_fsck_err() to centralize setting the indentation of multiline fsck errors. Signed-off-by: Kent Overstreet

bcachefs: Recovery no longer holds state_lock

2025-03-28T15:13:25Z

state_lock guards against devices coming or leaving, changing state, or the filesystem changing between ro <-> rw. But it's not necessary for running recovery passes, and holding it blocks asynchronous events that would cause us to go RO or kick out devices. Signed-off-by: Kent Overstreet

bcachefs: bch2_disk_accounting_mod2()

2025-03-24T13:50:37Z

We're hitting some issues with uninitialized struct padding, flagged by kmsan. They appear to be falso positives, otherwise bch2_accounting_validate() would have flagged them as "junk at end". But for now, we'll need to initialize disk_accounting_pos with memset(). This adds a new helper, bch2_disk_accounting_mod2(), that initializes a disk_accounting_pos and does the accounting mod all at once - so overall things actually get slightly more ergonomic. BCH_DISK_ACCOUNTING_replicas keys are left for now; KMSAN isn't warning about them and they're a bit special. Signed-off-by: Kent Overstreet

bcachefs: EIO cleanup

2025-03-24T13:50:36Z

Replace these with proper private error codes, so that when we get an error message we're not sifting through the entire codebase to see where it came from. Signed-off-by: Kent Overstreet

bcachefs: Filesystem discard option now propagates to devices

2025-03-24T13:50:35Z

the discard option is special, because it's both a filesystem and a device option. When set at the filesytsem level, it's supposed to propagate to (if set persistently via sysfs) or override (if non persistently as a mount option) the devices - that now works correctly. Signed-off-by: Kent Overstreet

bcachefs: Fix error type in bch2_alloc_v3_validate()

2025-03-15T01:02:15Z

Use error type alloc_v3_unpack_error in bch2_alloc_v3_validate(). Fixes: b65db750e2bb ("bcachefs: Enumerate fsck errors") Signed-off-by: Thorsten Blum Signed-off-by: Kent Overstreet

bcachefs: bcachefs_metadata_version_stripe_lru

2025-03-15T01:02:15Z

Add a persistent LRU for stripes, ordered by "number of empty blocks", i.e. order in which we wish to reuse them. This will replace the in-memory stripes heap, so we can kill off reading stripes into memory at startup. Signed-off-by: Kent Overstreet