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bcachefs: bch2_btree_iter_peek_node_and_restart()

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Minor refactoring for the Rust interface.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2023-03-06 04:01:22 -05:00
parent b65499b7b1
commit 511b629aca
2 changed files with 13 additions and 13 deletions
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11
fs/bcachefs/btree_iter.c
View file

@ -1723,6 +1723,17 @@ struct btree *bch2_btree_iter_peek_node(struct btree_iter *iter)
goto out;
}
struct btree *bch2_btree_iter_peek_node_and_restart(struct btree_iter *iter)
{
struct btree *b;
while (b = bch2_btree_iter_peek_node(iter),
bch2_err_matches(PTR_ERR_OR_ZERO(b), BCH_ERR_transaction_restart))
bch2_trans_begin(iter->trans);
return b;
}
struct btree *bch2_btree_iter_next_node(struct btree_iter *iter)
{
struct btree_trans *trans = iter->trans;

15
fs/bcachefs/btree_iter.h
View file

@ -294,6 +294,7 @@ int __must_check __bch2_btree_iter_traverse(struct btree_iter *iter);
int __must_check bch2_btree_iter_traverse(struct btree_iter *);
struct btree *bch2_btree_iter_peek_node(struct btree_iter *);
struct btree *bch2_btree_iter_peek_node_and_restart(struct btree_iter *);
struct btree *bch2_btree_iter_next_node(struct btree_iter *);
struct bkey_s_c bch2_btree_iter_peek_upto(struct btree_iter *, struct bpos);
@ -520,18 +521,6 @@ static inline struct bkey_i *bch2_bkey_get_mut(struct btree_trans *trans,
u32 bch2_trans_begin(struct btree_trans *);
static inline struct btree *
__btree_iter_peek_node_and_restart(struct btree_trans *trans, struct btree_iter *iter)
{
struct btree *b;
while (b = bch2_btree_iter_peek_node(iter),
bch2_err_matches(PTR_ERR_OR_ZERO(b), BCH_ERR_transaction_restart))
bch2_trans_begin(trans);
return b;
}
/*
* XXX
* this does not handle transaction restarts from bch2_btree_iter_next_node()
@ -541,7 +530,7 @@ __btree_iter_peek_node_and_restart(struct btree_trans *trans, struct btree_iter
_locks_want, _depth, _flags, _b, _ret) \
for (bch2_trans_node_iter_init((_trans), &(_iter), (_btree_id), \
_start, _locks_want, _depth, _flags); \
(_b) = __btree_iter_peek_node_and_restart((_trans), &(_iter)),\
(_b) = bch2_btree_iter_peek_node_and_restart(&(_iter)), \
!((_ret) = PTR_ERR_OR_ZERO(_b)) && (_b); \
(_b) = bch2_btree_iter_next_node(&(_iter)))