Add tests for bpf_map_update_batch().
$ ./test_maps
...
test_map_update_batch:PASS
...
---
.../bpf/map_tests/map_update_batch.c | 115 ++++++++++++++++++
1 file changed, 115 insertions(+)
create mode 100644 tools/testing/selftests/bpf/map_tests/map_update_batch.c
diff --git a/tools/testing/selftests/bpf/map_tests/map_update_batch.c
b/tools/testing/selftests/bpf/map_tests/map_update_batch.c
new file mode 100644
index 000000000000..67c1e11fc911
--- /dev/null
+++ b/tools/testing/selftests/bpf/map_tests/map_update_batch.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2019 Facebook */
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+#include <bpf/bpf.h>
+#include <bpf/libbpf.h>
+
+#include <test_maps.h>
+
+void test_map_update_batch(void)
+{
+ struct bpf_create_map_attr xattr = {
+ .name = "hash_map",
+ .map_type = BPF_MAP_TYPE_HASH,
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ };
+ int map_fd, *keys, *values, key, value;
+ const int max_entries = 10;
+ __u32 count, max_count;
+ int err, i;
+
+ xattr.max_entries = max_entries;
+ map_fd = bpf_create_map_xattr(&xattr);
+ CHECK(map_fd == -1,
+ "bpf_create_map_xattr()", "error:%s\n", strerror(errno));
+
+ keys = malloc(max_entries * sizeof(int));
+ values = malloc(max_entries * sizeof(int));
+ CHECK(!keys || !values, "malloc()", "error:%s\n", strerror(errno));
+
+ /* do not fill in the whole hash table, so we could test
+ * update with new elements.
+ */
+ max_count = max_entries - 2;
+
+ for (i = 0; i < max_count; i++) {
+ keys[i] = i + 1;
+ values[i] = i + 2;
+ }
+
+ /* test 1: count == 0, expect success. */
+ count = 0;
+ err = bpf_map_update_batch(map_fd, keys, values, &count, 0, 0);
+ CHECK(err, "count = 0", "error:%s\n", strerror(errno));
+
+ /* test 2: update initial map with BPF_NOEXIST, expect success. */
+ count = max_count;
+ err = bpf_map_update_batch(map_fd, keys, values,
+ &count, BPF_NOEXIST, 0);
+ CHECK(err, "elem_flags = BPF_NOEXIST",
+ "error:%s\n", strerror(errno));
+
+ /* use bpf_map_get_next_key to ensure all keys/values are indeed
+ * covered.
+ */
+ err = bpf_map_get_next_key(map_fd, NULL, &key);
+ CHECK(err, "bpf_map_get_next_key()", "error: %s\n", strerror(errno));
+ err = bpf_map_lookup_elem(map_fd, &key, &value);
+ CHECK(err, "bpf_map_lookup_elem()", "error: %s\n", strerror(errno));
+ CHECK(key + 1 != value, "key/value checking",
+ "error: key %d value %d\n", key, value);
+ i = 1;
+ while (!bpf_map_get_next_key(map_fd, &key, &key)) {
+ err = bpf_map_lookup_elem(map_fd, &key, &value);
+ CHECK(err, "bpf_map_lookup_elem()", "error: %s\n",
+ strerror(errno));
+ CHECK(key + 1 != value,
+ "key/value checking", "error: key %d value %d\n",
+ key, value);
+ i++;
+ }
+ CHECK(i != max_count, "checking number of entries",
+ "err: i %u max_count %u\n", i, max_count);
+
+ /* test 3: elem_flags = BPF_NOEXIST, already exists, expect failure */
+ err = bpf_map_update_batch(map_fd, keys, values,
+ &count, BPF_NOEXIST, 0);
+ /* failure to due to flag BPF_NOEXIST, count is set to 0 */
+ CHECK(!err || count, "elem_flags = BPF_NOEXIST again",
+ "unexpected success\n");
+
+ /* test 4: elem_flags = 0, expect success */
+ count = max_count;
+ err = bpf_map_update_batch(map_fd, keys, values,
+ &count, 0, 0);
+ CHECK(err, "elem_flags = 0", "error %s\n", strerror(errno));
+
+ /* test 5: keys = NULL, expect failure */
+ count = max_count;
+ err = bpf_map_update_batch(map_fd, NULL, values,
+ &count, 0, 0);
+ CHECK(!err, "keys = NULL", "unexpected success\n");
+
+ /* test 6: values = NULL, expect failure */
+ count = max_count;
+ err = bpf_map_update_batch(map_fd, keys, NULL, &count, 0, 0);
+ CHECK(!err, "values = NULL", "unexpected success\n");
+
+ /* test 7: modify the first key to be max_count + 10,
+ * elem_flags = BPF_NOEXIST,
+ * expect failure, the return count = 1.
+ */
+ count = max_count;
+ keys[0] = max_count + 10;
+ err = bpf_map_update_batch(map_fd, keys, values,
+ &count, BPF_NOEXIST, 0);
+ CHECK(!err, "keys[0] = max_count + 10", "unexpected success\n");
+ CHECK(count != 1, "keys[0] = max_count + 10",
+ "error: %s, incorrect count %u\n", strerror(errno), count);
+
+ printf("%s:PASS\n", __func__);
+}
--
2.17.1
