Btrfs: Fix extent code to use merge during delete

Remove implicit commit in del_item and insert_item
Add implicit commit to close()
Add commit op in random-test
Signed-off-by: Chris Mason <chris.mason@oracle.com>

fs/btrfs/ctree.c

@@ -1065,11 +1065,7 @@ int insert_item(struct ctree_root *root, struct key *key,
 	ret = search_slot(root, key, &path, data_size);
 	if (ret == 0) {
 		release_path(root, &path);
-		ret = -EEXIST;
-		wret = commit_transaction(root);
-		if (wret)
-			ret = wret;
-		return ret;
+		return -EEXIST;
 	}
 	if (ret < 0)
 		goto out;
@@ -1127,9 +1123,6 @@ int insert_item(struct ctree_root *root, struct key *key,
 	check_leaf(&path, 0);
 out:
 	release_path(root, &path);
-	wret = commit_transaction(root);
-	if (wret)
-		ret = wret;
 	return ret;
 }
 
@@ -1245,7 +1238,8 @@ int del_item(struct ctree_root *root, struct ctree_path *path)
 			wret = push_leaf_left(root, path, 1);
 			if (wret < 0)
 				ret = wret;
-			if (leaf->header.nritems) {
+			if (path->nodes[0] == leaf_buf &&
+			    leaf->header.nritems) {
 				wret = push_leaf_right(root, path, 1);
 				if (wret < 0)
 					ret = wret;
@@ -1265,9 +1259,6 @@ int del_item(struct ctree_root *root, struct ctree_path *path)
 			}
 		}
 	}
-	wret = commit_transaction(root);
-	if (wret)
-		ret = wret;
 	return ret;
 }
 

fs/btrfs/disk-io.c

@@ -239,6 +239,7 @@ static int drop_cache(struct ctree_root *root)
 }
 int close_ctree(struct ctree_root *root)
 {
+	commit_transaction(root);
 	drop_cache(root->extent_root);
 	drop_cache(root);
 	BUG_ON(!list_empty(&root->trans));

fs/btrfs/extent-tree.c

@@ -39,7 +39,7 @@ static int del_pending_extents(struct ctree_root *extent_root)
 			key.flags = 0;
 			key.offset = 1;
 			init_path(&path);
-			ret = search_slot(extent_root, &key, &path, 0);
+			ret = search_slot(extent_root, &key, &path, -1);
 			if (ret) {
 				print_tree(extent_root, extent_root->node);
 				printf("unable to find %Lu\n", key.objectid);
@@ -83,7 +83,7 @@ int free_extent(struct ctree_root *root, u64 blocknr, u64 num_blocks)
 		return 0;
 	}
 	init_path(&path);
-	ret = search_slot(extent_root, &key, &path, 0);
+	ret = search_slot(extent_root, &key, &path, -1);
 	if (ret) {
 		print_tree(extent_root, extent_root->node);
 		printf("failed to find %Lu\n", key.objectid);

fs/btrfs/random-test.c

@@ -59,6 +59,11 @@ static int ins_one(struct ctree_root *root, struct radix_tree_root *radix)
 	return -1;
 }
 
+static int run_commit(struct ctree_root *root, struct radix_tree_root *radix)
+{
+	return commit_transaction(root);
+}
+
 static int insert_dup(struct ctree_root *root, struct radix_tree_root *radix)
 {
 	struct ctree_path path;
@@ -233,7 +238,8 @@ static int bulk_op(struct ctree_root *root, struct radix_tree_root *radix)
 
 
 int (*ops[])(struct ctree_root *root, struct radix_tree_root *radix) =
-{ ins_one, insert_dup, del_one, lookup_item, lookup_enoent, bulk_op };
+	{ ins_one, insert_dup, del_one, lookup_item,
+	  lookup_enoent, bulk_op, run_commit };
 
 static int fill_radix(struct ctree_root *root, struct radix_tree_root *radix)
 {
@@ -366,7 +372,7 @@ int main(int ac, char **av)
 				err = ret;
 				goto out;
 			}
-			if (ops[op] == bulk_op)
+			if (ops[op] == bulk_op || ops[op] == run_commit)
 				break;
 			if (keep_running == 0) {
 				err = 0;