bcachefs: Run bch2_check_fix_ptrs() via triggers

Currently, the reflink_p gc trigger does repair as well - turning a
reflink_p key into an error key if the reflink_v it points to doesn't
exist.

This won't work with online check/repair, because the repair path once
online will be subject to transaction restarts, but BTREE_TRIGGER_gc is
not idempotant - we can't run it multiple times if we get a transaction
restart.

So we need to split these paths; to do so this patch calls
check_fix_ptrs() by a new general path - a new trigger type,
BTREE_TRIGGER_check_repair.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/bcachefs/buckets.h b/fs/bcachefs/buckets.h
index c2c2ac36bee5..df10f390101a 100644
--- a/fs/bcachefs/buckets.h
+++ b/fs/bcachefs/buckets.h
@@ -341,6 +341,10 @@ int bch2_bucket_ref_update(struct btree_trans *, struct bkey_s_c,
 			   const struct bch_extent_ptr *,
 			   s64, enum bch_data_type, u8, u8, u32 *);
 
+int bch2_check_fix_ptrs(struct btree_trans *,
+			enum btree_id, unsigned, struct bkey_s_c,
+			enum btree_iter_update_trigger_flags);
+
 int bch2_trigger_extent(struct btree_trans *, enum btree_id, unsigned,
 			struct bkey_s_c, struct bkey_s,
 			enum btree_iter_update_trigger_flags);