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bcachefs: Kill bch2_propagate_key_to_snapshot_leaves()

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Dead code now.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-09-30 00:38:13 -04:00
parent 9b23fdbd5d
commit 84878e8245
2 changed files with 0 additions and 100 deletions
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97
fs/bcachefs/snapshot.c
View File

@ -1732,103 +1732,6 @@ int __bch2_key_has_snapshot_overwrites(struct btree_trans *trans,
return ret;
}
static u32 bch2_snapshot_smallest_child(struct bch_fs *c, u32 id)
{
const struct snapshot_t *s = snapshot_t(c, id);
return s->children[1] ?: s->children[0];
}
static u32 bch2_snapshot_smallest_descendent(struct bch_fs *c, u32 id)
{
u32 child;
while ((child = bch2_snapshot_smallest_child(c, id)))
id = child;
return id;
}
static int bch2_propagate_key_to_snapshot_leaf(struct btree_trans *trans,
enum btree_id btree,
struct bkey_s_c interior_k,
u32 leaf_id, struct bpos *new_min_pos)
{
struct btree_iter iter;
struct bpos pos = interior_k.k->p;
struct bkey_s_c k;
struct bkey_i *new;
int ret;
pos.snapshot = leaf_id;
bch2_trans_iter_init(trans, &iter, btree, pos, BTREE_ITER_intent);
k = bch2_btree_iter_peek_slot(&iter);
ret = bkey_err(k);
if (ret)
goto out;
/* key already overwritten in this snapshot? */
if (k.k->p.snapshot != interior_k.k->p.snapshot)
goto out;
if (bpos_eq(*new_min_pos, POS_MIN)) {
*new_min_pos = k.k->p;
new_min_pos->snapshot = leaf_id;
}
new = bch2_bkey_make_mut_noupdate(trans, interior_k);
ret = PTR_ERR_OR_ZERO(new);
if (ret)
goto out;
new->k.p.snapshot = leaf_id;
ret = bch2_trans_update(trans, &iter, new, 0);
out:
bch2_set_btree_iter_dontneed(&iter);
bch2_trans_iter_exit(trans, &iter);
return ret;
}
int bch2_propagate_key_to_snapshot_leaves(struct btree_trans *trans,
enum btree_id btree,
struct bkey_s_c k,
struct bpos *new_min_pos)
{
struct bch_fs *c = trans->c;
struct bkey_buf sk;
u32 restart_count = trans->restart_count;
int ret = 0;
bch2_bkey_buf_init(&sk);
bch2_bkey_buf_reassemble(&sk, c, k);
k = bkey_i_to_s_c(sk.k);
*new_min_pos = POS_MIN;
for (u32 id = bch2_snapshot_smallest_descendent(c, k.k->p.snapshot);
id < k.k->p.snapshot;
id++) {
if (!bch2_snapshot_is_ancestor(c, id, k.k->p.snapshot) ||
!bch2_snapshot_is_leaf(c, id))
continue;
again:
ret = btree_trans_too_many_iters(trans) ?:
bch2_propagate_key_to_snapshot_leaf(trans, btree, k, id, new_min_pos) ?:
bch2_trans_commit(trans, NULL, NULL, 0);
if (ret && bch2_err_matches(ret, BCH_ERR_transaction_restart)) {
bch2_trans_begin(trans);
goto again;
}
if (ret)
break;
}
bch2_bkey_buf_exit(&sk, c);
return ret ?: trans_was_restarted(trans, restart_count);
}
static int bch2_check_snapshot_needs_deletion(struct btree_trans *trans, struct bkey_s_c k)
{
struct bch_fs *c = trans->c;

3
fs/bcachefs/snapshot.h
View File

@ -259,9 +259,6 @@ static inline int bch2_key_has_snapshot_overwrites(struct btree_trans *trans,
return __bch2_key_has_snapshot_overwrites(trans, id, pos);
}
int bch2_propagate_key_to_snapshot_leaves(struct btree_trans *, enum btree_id,
struct bkey_s_c, struct bpos *);
int bch2_snapshots_read(struct bch_fs *);
void bch2_fs_snapshots_exit(struct bch_fs *);