bcachefs: Use darray for extra_journal_entries

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

fs/bcachefs/btree_iter.c

@@ -3055,8 +3055,7 @@ void bch2_trans_begin(struct btree_trans *trans)
 	trans->mem_top			= 0;
 
 	trans->hooks			= NULL;
-	trans->extra_journal_entries	= NULL;
-	trans->extra_journal_entry_u64s	= 0;
+	trans->extra_journal_entries.nr	= 0;
 
 	if (trans->fs_usage_deltas) {
 		trans->fs_usage_deltas->used = 0;
@@ -3196,6 +3195,8 @@ void bch2_trans_exit(struct btree_trans *trans)
 
 	bch2_journal_preres_put(&c->journal, &trans->journal_preres);
 
+	kfree(trans->extra_journal_entries.data);
+
 	if (trans->fs_usage_deltas) {
 		if (trans->fs_usage_deltas->size + sizeof(trans->fs_usage_deltas) ==
 		    REPLICAS_DELTA_LIST_MAX)

fs/bcachefs/btree_types.h

@@ -7,6 +7,7 @@
 
 #include "bkey_methods.h"
 #include "buckets_types.h"
+#include "darray.h"
 #include "journal_types.h"
 #include "six.h"
 
@@ -416,8 +417,7 @@ struct btree_trans {
 
 	/* update path: */
 	struct btree_trans_commit_hook *hooks;
-	struct jset_entry	*extra_journal_entries;
-	unsigned		extra_journal_entry_u64s;
+	DARRAY(u64)		extra_journal_entries;
 	struct journal_entry_pin *journal_pin;
 
 	struct journal_res	journal_res;

fs/bcachefs/btree_update_interior.c

@@ -518,8 +518,15 @@ static int btree_update_nodes_written_trans(struct btree_trans *trans,
 	struct bkey_i *k;
 	int ret;
 
-	trans->extra_journal_entries = (void *) &as->journal_entries[0];
-	trans->extra_journal_entry_u64s = as->journal_u64s;
+	ret = darray_make_room(&trans->extra_journal_entries, as->journal_u64s);
+	if (ret)
+		return ret;
+
+	memcpy(&darray_top(trans->extra_journal_entries),
+	       as->journal_entries,
+	       as->journal_u64s * sizeof(u64));
+	trans->extra_journal_entries.nr += as->journal_u64s;
+
 	trans->journal_pin = &as->journal;
 
 	for_each_keylist_key(&as->new_keys, k) {
@@ -1905,7 +1912,6 @@ static int __bch2_btree_node_update_key(struct btree_trans *trans,
 	struct bch_fs *c = trans->c;
 	struct btree_iter iter2 = { NULL };
 	struct btree *parent;
-	u64 journal_entries[BKEY_BTREE_PTR_U64s_MAX];
 	int ret;
 
 	if (!skip_triggers) {
@@ -1949,12 +1955,16 @@ static int __bch2_btree_node_update_key(struct btree_trans *trans,
 	} else {
 		BUG_ON(btree_node_root(c, b) != b);
 
-		trans->extra_journal_entries = (void *) &journal_entries[0];
-		trans->extra_journal_entry_u64s =
-			journal_entry_set((void *) &journal_entries[0],
-					  BCH_JSET_ENTRY_btree_root,
-					  b->c.btree_id, b->c.level,
-					  new_key, new_key->k.u64s);
+		ret = darray_make_room(&trans->extra_journal_entries,
+				       jset_u64s(new_key->k.u64s));
+		if (ret)
+			return ret;
+
+		journal_entry_set((void *) &darray_top(trans->extra_journal_entries),
+				  BCH_JSET_ENTRY_btree_root,
+				  b->c.btree_id, b->c.level,
+				  new_key, new_key->k.u64s);
+		trans->extra_journal_entries.nr += jset_u64s(new_key->k.u64s);
 	}
 
 	ret = bch2_trans_commit(trans, NULL, NULL,

fs/bcachefs/btree_update_leaf.c

@@ -707,13 +707,13 @@ bch2_trans_commit_write_locked(struct btree_trans *trans,
 		trans->journal_res.seq = c->journal.replay_journal_seq;
 	}
 
-	if (unlikely(trans->extra_journal_entry_u64s)) {
+	if (unlikely(trans->extra_journal_entries.nr)) {
 		memcpy_u64s_small(journal_res_entry(&c->journal, &trans->journal_res),
-				  trans->extra_journal_entries,
-				  trans->extra_journal_entry_u64s);
+				  trans->extra_journal_entries.data,
+				  trans->extra_journal_entries.nr);
 
-		trans->journal_res.offset	+= trans->extra_journal_entry_u64s;
-		trans->journal_res.u64s		-= trans->extra_journal_entry_u64s;
+		trans->journal_res.offset	+= trans->extra_journal_entries.nr;
+		trans->journal_res.u64s		-= trans->extra_journal_entries.nr;
 	}
 
 	/*
@@ -1096,7 +1096,7 @@ int __bch2_trans_commit(struct btree_trans *trans)
 	int ret = 0;
 
 	if (!trans->nr_updates &&
-	    !trans->extra_journal_entry_u64s)
+	    !trans->extra_journal_entries.nr)
 		goto out_reset;
 
 	if (trans->flags & BTREE_INSERT_GC_LOCK_HELD)
@@ -1120,7 +1120,7 @@ int __bch2_trans_commit(struct btree_trans *trans)
 
 	memset(&trans->journal_preres, 0, sizeof(trans->journal_preres));
 
-	trans->journal_u64s		= trans->extra_journal_entry_u64s;
+	trans->journal_u64s		= trans->extra_journal_entries.nr;
 	trans->journal_preres_u64s	= 0;
 
 	trans->journal_transaction_names = READ_ONCE(c->opts.journal_transaction_names);
@@ -1180,8 +1180,7 @@ int __bch2_trans_commit(struct btree_trans *trans)
 	trans->extra_journal_res	= 0;
 	trans->nr_updates		= 0;
 	trans->hooks			= NULL;
-	trans->extra_journal_entries	= NULL;
-	trans->extra_journal_entry_u64s	= 0;
+	trans->extra_journal_entries.nr	= 0;
 
 	if (trans->fs_usage_deltas) {
 		trans->fs_usage_deltas->used = 0;