bcachefs: Kill __bch2_accounting_mem_mod()

The next patch will be adding a disk accounting counter type which is
not kept in the in-memory eytzinger tree.

As prep, fold __bch2_accounting_mem_mod() into
bch2_accounting_mem_mod_locked() so that we can check for that counter
type and bail out without calling bpos_to_disk_accounting_pos() twice.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/btree_trans_commit.c

@@ -712,7 +712,7 @@ bch2_trans_commit_write_locked(struct btree_trans *trans, unsigned flags,
 				a->k.version = journal_pos_to_bversion(&trans->journal_res,
 								(u64 *) entry - (u64 *) trans->journal_entries);
 				BUG_ON(bversion_zero(a->k.version));
-				ret = bch2_accounting_mem_mod_locked(trans, accounting_i_to_s_c(a), false);
+				ret = bch2_accounting_mem_mod_locked(trans, accounting_i_to_s_c(a), false, false);
 				if (ret)
 					goto revert_fs_usage;
 			}
@@ -798,7 +798,7 @@ bch2_trans_commit_write_locked(struct btree_trans *trans, unsigned flags,
 			struct bkey_s_accounting a = bkey_i_to_s_accounting(entry2->start);
 
 			bch2_accounting_neg(a);
-			bch2_accounting_mem_mod_locked(trans, a.c, false);
+			bch2_accounting_mem_mod_locked(trans, a.c, false, false);
 			bch2_accounting_neg(a);
 		}
 	percpu_up_read(&c->mark_lock);

fs/bcachefs/disk_accounting.c

@@ -566,7 +566,7 @@ int bch2_gc_accounting_done(struct bch_fs *c)
 					struct { __BKEY_PADDED(k, BCH_ACCOUNTING_MAX_COUNTERS); } k_i;
 
 					accounting_key_init(&k_i.k, &acc_k, src_v, nr);
-					bch2_accounting_mem_mod_locked(trans, bkey_i_to_s_c_accounting(&k_i.k), false);
+					bch2_accounting_mem_mod_locked(trans, bkey_i_to_s_c_accounting(&k_i.k), false, false);
 
 					preempt_disable();
 					struct bch_fs_usage_base *dst = this_cpu_ptr(c->usage);
@@ -595,7 +595,7 @@ static int accounting_read_key(struct btree_trans *trans, struct bkey_s_c k)
 		return 0;
 
 	percpu_down_read(&c->mark_lock);
-	int ret = __bch2_accounting_mem_mod(c, bkey_s_c_to_accounting(k), false);
+	int ret = bch2_accounting_mem_mod_locked(trans, bkey_s_c_to_accounting(k), false, true);
 	percpu_up_read(&c->mark_lock);
 
 	if (bch2_accounting_key_is_zero(bkey_s_c_to_accounting(k)) &&

fs/bcachefs/disk_accounting.h

@@ -106,41 +106,17 @@ static inline int accounting_pos_cmp(const void *_l, const void *_r)
 int bch2_accounting_mem_insert(struct bch_fs *, struct bkey_s_c_accounting, bool);
 void bch2_accounting_mem_gc(struct bch_fs *);
 
-static inline int __bch2_accounting_mem_mod(struct bch_fs *c, struct bkey_s_c_accounting a, bool gc)
-{
-	struct bch_accounting_mem *acc = &c->accounting;
-	unsigned idx;
-
-	EBUG_ON(gc && !acc->gc_running);
-
-	while ((idx = eytzinger0_find(acc->k.data, acc->k.nr, sizeof(acc->k.data[0]),
-				      accounting_pos_cmp, &a.k->p)) >= acc->k.nr) {
-		int ret = bch2_accounting_mem_insert(c, a, gc);
-		if (ret)
-			return ret;
-	}
-
-	struct accounting_mem_entry *e = &acc->k.data[idx];
-
-	EBUG_ON(bch2_accounting_counters(a.k) != e->nr_counters);
-
-	for (unsigned i = 0; i < bch2_accounting_counters(a.k); i++)
-		this_cpu_add(e->v[gc][i], a.v->d[i]);
-	return 0;
-}
-
 /*
  * Update in memory counters so they match the btree update we're doing; called
  * from transaction commit path
  */
-static inline int bch2_accounting_mem_mod_locked(struct btree_trans *trans, struct bkey_s_c_accounting a, bool gc)
+static inline int bch2_accounting_mem_mod_locked(struct btree_trans *trans, struct bkey_s_c_accounting a, bool gc, bool read)
 {
 	struct bch_fs *c = trans->c;
+	struct disk_accounting_pos acc_k;
+	bpos_to_disk_accounting_pos(&acc_k, a.k->p);
 
-	if (!gc) {
-		struct disk_accounting_pos acc_k;
-		bpos_to_disk_accounting_pos(&acc_k, a.k->p);
-
+	if (!gc && !read) {
 		switch (acc_k.type) {
 		case BCH_DISK_ACCOUNTING_persistent_reserved:
 			trans->fs_usage_delta.reserved += acc_k.persistent_reserved.nr_replicas * a.v->d[0];
@@ -161,13 +137,31 @@ static inline int bch2_accounting_mem_mod_locked(struct btree_trans *trans, stru
 		}
 	}
 
-	return __bch2_accounting_mem_mod(c, a, gc);
+	struct bch_accounting_mem *acc = &c->accounting;
+	unsigned idx;
+
+	EBUG_ON(gc && !acc->gc_running);
+
+	while ((idx = eytzinger0_find(acc->k.data, acc->k.nr, sizeof(acc->k.data[0]),
+				      accounting_pos_cmp, &a.k->p)) >= acc->k.nr) {
+		int ret = bch2_accounting_mem_insert(c, a, gc);
+		if (ret)
+			return ret;
+	}
+
+	struct accounting_mem_entry *e = &acc->k.data[idx];
+
+	EBUG_ON(bch2_accounting_counters(a.k) != e->nr_counters);
+
+	for (unsigned i = 0; i < bch2_accounting_counters(a.k); i++)
+		this_cpu_add(e->v[gc][i], a.v->d[i]);
+	return 0;
 }
 
 static inline int bch2_accounting_mem_add(struct btree_trans *trans, struct bkey_s_c_accounting a, bool gc)
 {
 	percpu_down_read(&trans->c->mark_lock);
-	int ret = bch2_accounting_mem_mod_locked(trans, a, gc);
+	int ret = bch2_accounting_mem_mod_locked(trans, a, gc, false);
 	percpu_up_read(&trans->c->mark_lock);
 	return ret;
 }