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-rw-r--r--tools/testing/selftests/bpf/prog_tests/test_mmap_inner_array.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/test_mmap_inner_array.c b/tools/testing/selftests/bpf/prog_tests/test_mmap_inner_array.c
new file mode 100644
index 000000000000..ce745776ed18
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/test_mmap_inner_array.c
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
+#include <test_progs.h>
+#include <sys/mman.h>
+#include "mmap_inner_array.skel.h"
+
+void test_mmap_inner_array(void)
+{
+ const long page_size = sysconf(_SC_PAGE_SIZE);
+ struct mmap_inner_array *skel;
+ int inner_array_fd, err;
+ void *tmp;
+ __u64 *val;
+
+ skel = mmap_inner_array__open_and_load();
+
+ if (!ASSERT_OK_PTR(skel, "open_and_load"))
+ return;
+
+ inner_array_fd = bpf_map__fd(skel->maps.inner_array);
+ tmp = mmap(NULL, page_size, PROT_READ | PROT_WRITE, MAP_SHARED, inner_array_fd, 0);
+ if (!ASSERT_OK_PTR(tmp, "inner array mmap"))
+ goto out;
+ val = (void *)tmp;
+
+ err = mmap_inner_array__attach(skel);
+ if (!ASSERT_OK(err, "attach"))
+ goto out_unmap;
+
+ skel->bss->pid = getpid();
+ usleep(1);
+
+ /* pid is set, pid_match == true and outer_map_match == false */
+ ASSERT_TRUE(skel->bss->pid_match, "pid match 1");
+ ASSERT_FALSE(skel->bss->outer_map_match, "outer map match 1");
+ ASSERT_FALSE(skel->bss->done, "done 1");
+ ASSERT_EQ(*val, 0, "value match 1");
+
+ err = bpf_map__update_elem(skel->maps.outer_map,
+ &skel->bss->pid, sizeof(skel->bss->pid),
+ &inner_array_fd, sizeof(inner_array_fd),
+ BPF_ANY);
+ if (!ASSERT_OK(err, "update elem"))
+ goto out_unmap;
+ usleep(1);
+
+ /* outer map key is set, outer_map_match == true */
+ ASSERT_TRUE(skel->bss->pid_match, "pid match 2");
+ ASSERT_TRUE(skel->bss->outer_map_match, "outer map match 2");
+ ASSERT_TRUE(skel->bss->done, "done 2");
+ ASSERT_EQ(*val, skel->data->match_value, "value match 2");
+
+out_unmap:
+ munmap(tmp, page_size);
+out:
+ mmap_inner_array__destroy(skel);
+}