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bcachefs: bch2_btree_node_rewrite_pos()

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Add a new helper for rewriting a btree node given a just the key, not a
pointer to the node itself.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-12-28 21:00:34 -05:00
parent ca16fa6b86
commit 12188c9e2b
2 changed files with 24 additions and 0 deletions
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20
fs/bcachefs/btree_update_interior.c
View File

@ -2238,6 +2238,26 @@ out:
return ret;
}
int bch2_btree_node_rewrite_pos(struct btree_trans *trans,
enum btree_id btree, unsigned level,
struct bpos pos, unsigned flags)
{
BUG_ON(!level);
/* Traverse one depth lower to get a pointer to the node itself: */
struct btree_iter iter;
bch2_trans_node_iter_init(trans, &iter, btree, pos, 0, level - 1, 0);
struct btree *b = bch2_btree_iter_peek_node(&iter);
int ret = PTR_ERR_OR_ZERO(b);
if (ret)
goto err;
ret = bch2_btree_node_rewrite(trans, &iter, b, flags);
err:
bch2_trans_iter_exit(trans, &iter);
return ret;
}
int bch2_btree_node_rewrite_key_get_iter(struct btree_trans *trans,
struct btree *b, unsigned flags)
{

4
fs/bcachefs/btree_update_interior.h
View File

@ -169,10 +169,14 @@ static inline int bch2_foreground_maybe_merge(struct btree_trans *trans,
int bch2_btree_node_rewrite(struct btree_trans *, struct btree_iter *,
struct btree *, unsigned);
int bch2_btree_node_rewrite_pos(struct btree_trans *,
enum btree_id, unsigned,
struct bpos, unsigned);
int bch2_btree_node_rewrite_key_get_iter(struct btree_trans *,
struct btree *, unsigned);
void bch2_btree_node_rewrite_async(struct bch_fs *, struct btree *);
int bch2_btree_node_update_key(struct btree_trans *, struct btree_iter *,
struct btree *, struct bkey_i *,
unsigned, bool);