diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/test_mmap_inner_array.c')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/test_mmap_inner_array.c | 57 |
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); +} |