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-rw-r--r--tools/testing/selftests/bpf/prog_tests/pinning.c49
1 files changed, 48 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/pinning.c b/tools/testing/selftests/bpf/prog_tests/pinning.c
index 041952524c55..fcf54b3a1dd0 100644
--- a/tools/testing/selftests/bpf/prog_tests/pinning.c
+++ b/tools/testing/selftests/bpf/prog_tests/pinning.c
@@ -37,7 +37,7 @@ void test_pinning(void)
struct stat statbuf = {};
struct bpf_object *obj;
struct bpf_map *map;
- int err;
+ int err, map_fd;
DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts,
.pin_root_path = custpath,
);
@@ -213,6 +213,53 @@ void test_pinning(void)
if (CHECK(err, "stat custpinpath", "err %d errno %d\n", err, errno))
goto out;
+ /* remove the custom pin path to re-test it with reuse fd below */
+ err = unlink(custpinpath);
+ if (CHECK(err, "unlink custpinpath", "err %d errno %d\n", err, errno))
+ goto out;
+
+ err = rmdir(custpath);
+ if (CHECK(err, "rmdir custpindir", "err %d errno %d\n", err, errno))
+ goto out;
+
+ bpf_object__close(obj);
+
+ /* test pinning at custom path with reuse fd */
+ obj = bpf_object__open_file(file, NULL);
+ err = libbpf_get_error(obj);
+ if (CHECK(err, "default open", "err %d errno %d\n", err, errno)) {
+ obj = NULL;
+ goto out;
+ }
+
+ map_fd = bpf_create_map(BPF_MAP_TYPE_ARRAY, sizeof(__u32),
+ sizeof(__u64), 1, 0);
+ if (CHECK(map_fd < 0, "create pinmap manually", "fd %d\n", map_fd))
+ goto out;
+
+ map = bpf_object__find_map_by_name(obj, "pinmap");
+ if (CHECK(!map, "find map", "NULL map"))
+ goto close_map_fd;
+
+ err = bpf_map__reuse_fd(map, map_fd);
+ if (CHECK(err, "reuse pinmap fd", "err %d errno %d\n", err, errno))
+ goto close_map_fd;
+
+ err = bpf_map__set_pin_path(map, custpinpath);
+ if (CHECK(err, "set pin path", "err %d errno %d\n", err, errno))
+ goto close_map_fd;
+
+ err = bpf_object__load(obj);
+ if (CHECK(err, "custom load", "err %d errno %d\n", err, errno))
+ goto close_map_fd;
+
+ /* check that pinmap was pinned at the custom path */
+ err = stat(custpinpath, &statbuf);
+ if (CHECK(err, "stat custpinpath", "err %d errno %d\n", err, errno))
+ goto close_map_fd;
+
+close_map_fd:
+ close(map_fd);
out:
unlink(pinpath);
unlink(nopinpath);