Update bcachefs sources to 2e8463c770 bcachefs: Rework lru btreev0.26

1 files changed, 34 insertions, 79 deletions

diff --git a/libbcachefs/lru.c b/libbcachefs/lru.c
index 380b66c7..f7bb2be2 100644
--- a/libbcachefs/lru.c
+++ b/libbcachefs/lru.c
@@ -8,6 +8,7 @@
 #include "lru.h"
 #include "recovery.h"
 
+/* KEY_TYPE_lru is obsolete: */
 int bch2_lru_invalid(const struct bch_fs *c, struct bkey_s_c k,
 		     int rw, struct printbuf *err)
 {
@@ -30,101 +31,57 @@ void bch2_lru_to_text(struct printbuf *out, struct bch_fs *c,
 	prt_printf(out, "idx %llu", le64_to_cpu(lru->idx));
 }
 
-int bch2_lru_delete(struct btree_trans *trans, u64 id, u64 idx, u64 time,
-		    struct bkey_s_c orig_k)
+static int __bch2_lru_set(struct btree_trans *trans, u16 lru_id,
+			u64 dev_bucket, u64 time, unsigned key_type)
 {
 	struct btree_iter iter;
-	struct bkey_s_c k;
-	u64 existing_idx;
-	struct printbuf buf = PRINTBUF;
+	struct bkey_i *k;
 	int ret = 0;
 
 	if (!time)
 		return 0;
 
-	bch2_trans_iter_init(trans, &iter, BTREE_ID_lru,
-			     POS(id, time),
-			     BTREE_ITER_INTENT|
-			     BTREE_ITER_WITH_UPDATES);
-	k = bch2_btree_iter_peek_slot(&iter);
-	ret = bkey_err(k);
-	if (ret)
-		goto err;
+	k = bch2_trans_kmalloc_nomemzero(trans, sizeof(*k));
+	ret = PTR_ERR_OR_ZERO(k);
+	if (unlikely(ret))
+		return ret;
 
-	if (k.k->type != KEY_TYPE_lru) {
-		bch2_bkey_val_to_text(&buf, trans->c, orig_k);
-		bch2_trans_inconsistent(trans,
-			"pointer to nonexistent lru %llu:%llu\n%s",
-			id, time, buf.buf);
-		ret = -EIO;
-		goto err;
-	}
+	bkey_init(&k->k);
+	k->k.type = key_type;
+	k->k.p = lru_pos(lru_id, dev_bucket, time);
 
-	existing_idx = le64_to_cpu(bkey_s_c_to_lru(k).v->idx);
-	if (existing_idx != idx) {
-		bch2_bkey_val_to_text(&buf, trans->c, orig_k);
-		bch2_trans_inconsistent(trans,
-			"lru %llu:%llu with wrong backpointer: got %llu, should be %llu\n%s",
-			id, time, existing_idx, idx, buf.buf);
-		ret = -EIO;
-		goto err;
-	}
+	EBUG_ON(lru_pos_id(k->k.p) != lru_id);
+	EBUG_ON(lru_pos_time(k->k.p) != time);
+	EBUG_ON(k->k.p.offset != dev_bucket);
 
-	ret = bch2_btree_delete_at(trans, &iter, 0);
-err:
+	bch2_trans_iter_init(trans, &iter, BTREE_ID_lru,
+			     k->k.p, BTREE_ITER_INTENT);
+
+	ret = bch2_btree_iter_traverse(&iter) ?:
+		bch2_btree_delete_at(trans, &iter, 0);
 	bch2_trans_iter_exit(trans, &iter);
-	printbuf_exit(&buf);
 	return ret;
 }
 
-int bch2_lru_set(struct btree_trans *trans, u64 lru_id, u64 idx, u64 *time)
+int bch2_lru_del(struct btree_trans *trans, u16 lru_id, u64 dev_bucket, u64 time)
 {
-	struct btree_iter iter;
-	struct bkey_s_c k;
-	struct bkey_i_lru *lru;
-	int ret = 0;
-
-	if (!*time)
-		return 0;
-
-	for_each_btree_key_norestart(trans, iter, BTREE_ID_lru,
-			POS(lru_id, *time),
-			BTREE_ITER_SLOTS|
-			BTREE_ITER_INTENT|
-			BTREE_ITER_WITH_UPDATES, k, ret)
-		if (bkey_deleted(k.k))
-			break;
-
-	if (ret)
-		goto err;
-
-	BUG_ON(iter.pos.inode != lru_id);
-	*time = iter.pos.offset;
-
-	lru = bch2_bkey_alloc(trans, &iter, lru);
-	ret = PTR_ERR_OR_ZERO(lru);
-	if (ret)
-		goto err;
-
-	lru->v.idx = cpu_to_le64(idx);
+	return __bch2_lru_set(trans, lru_id, dev_bucket, time, KEY_TYPE_deleted);
+}
 
-	ret = bch2_trans_update(trans, &iter, &lru->k_i, 0);
-	if (ret)
-		goto err;
-err:
-	bch2_trans_iter_exit(trans, &iter);
-	return ret;
+int bch2_lru_set(struct btree_trans *trans, u16 lru_id, u64 dev_bucket, u64 time)
+{
+	return __bch2_lru_set(trans, lru_id, dev_bucket, time, KEY_TYPE_set);
 }
 
-int bch2_lru_change(struct btree_trans *trans, u64 id, u64 idx,
-		    u64 old_time, u64 *new_time,
-		    struct bkey_s_c k)
+int bch2_lru_change(struct btree_trans *trans,
+		    u16 lru_id, u64 dev_bucket,
+		    u64 old_time, u64 new_time)
 {
-	if (old_time == *new_time)
+	if (old_time == new_time)
 		return 0;
 
-	return  bch2_lru_delete(trans, id, idx, old_time, k) ?:
-		bch2_lru_set(trans, id, idx, new_time);
+	return  bch2_lru_del(trans, lru_id, dev_bucket, old_time) ?:
+		bch2_lru_set(trans, lru_id, dev_bucket, new_time);
 }
 
 static int bch2_check_lru_key(struct btree_trans *trans,
@@ -138,12 +95,9 @@ static int bch2_check_lru_key(struct btree_trans *trans,
 	const struct bch_alloc_v4 *a;
 	struct printbuf buf1 = PRINTBUF;
 	struct printbuf buf2 = PRINTBUF;
-	struct bpos alloc_pos;
+	struct bpos alloc_pos = u64_to_bucket(lru_k.k->p.offset);
 	int ret;
 
-	alloc_pos = POS(lru_k.k->p.inode,
-			le64_to_cpu(bkey_s_c_to_lru(lru_k).v->idx));
-
 	if (fsck_err_on(!bch2_dev_bucket_exists(c, alloc_pos), c,
 			"lru key points to nonexistent device:bucket %llu:%llu",
 			alloc_pos.inode, alloc_pos.offset))
@@ -157,7 +111,8 @@ static int bch2_check_lru_key(struct btree_trans *trans,
 
 	a = bch2_alloc_to_v4(k, &a_convert);
 
-	if (fsck_err_on(a->data_type != BCH_DATA_cached ||
+	if (fsck_err_on(k.k->type != KEY_TYPE_set ||
+			a->data_type != BCH_DATA_cached ||
 			a->io_time[READ] != lru_k.k->p.offset, c,
 			"incorrect lru entry %s\n"
 			"  for %s",