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selftests/bpf: Add tests for automatic map unpinning on load failure 

This add tests for the different variations of automatic map unpinning on
load failure.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/157333184838.88376.8243704248624814775.stgit@toke.dk
This commit is contained in:
Toke Høiland-Jørgensen 2019-11-09 21:37:28 +01:00 committed by Alexei Starovoitov
parent ec6d5f47bf
commit 9c4e395a1e
2 changed files with 18 additions and 4 deletions
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20
tools/testing/selftests/bpf/prog_tests/pinning.c
View File

@ -163,12 +163,15 @@ void test_pinning(void)
goto out;
}
/* swap pin paths of the two maps */
/* set pin paths so that nopinmap2 will attempt to reuse the map at
* pinpath (which will fail), but not before pinmap has already been
* reused
*/
bpf_object__for_each_map(map, obj) {
if (!strcmp(bpf_map__name(map), "nopinmap"))
err = bpf_map__set_pin_path(map, nopinpath2);
else if (!strcmp(bpf_map__name(map), "nopinmap2"))
err = bpf_map__set_pin_path(map, pinpath);
else if (!strcmp(bpf_map__name(map), "pinmap"))
err = bpf_map__set_pin_path(map, NULL);
else
continue;
@ -181,6 +184,17 @@ void test_pinning(void)
if (CHECK(err != -EINVAL, "param mismatch load", "err %d errno %d\n", err, errno))
goto out;
/* nopinmap2 should have been pinned and cleaned up again */
err = stat(nopinpath2, &statbuf);
if (CHECK(!err || errno != ENOENT, "stat nopinpath2",
"err %d errno %d\n", err, errno))
goto out;
/* pinmap should still be there */
err = stat(pinpath, &statbuf);
if (CHECK(err, "stat pinpath", "err %d errno %d\n", err, errno))
goto out;
bpf_object__close(obj);
/* test auto-pinning at custom path with open opt */

2
tools/testing/selftests/bpf/progs/test_pinning.c
View File

@ -21,7 +21,7 @@ struct {
} nopinmap SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
__uint(type, BPF_MAP_TYPE_HASH);
__uint(max_entries, 1);
__type(key, __u32);
__type(value, __u64);