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authorLorenz Bauer <lmb@cloudflare.com>2018-12-03 11:31:26 +0000
committerAlexei Starovoitov <ast@kernel.org>2018-12-04 08:18:13 -0800
commitdf47fc376df8338fdc9b27a5c9162a08f6e6157c (patch)
tree416ce2a6672f6c97c074df80912ec09e2ff0c29c /tools
parentlibbpf: add bpf_prog_test_run_xattr (diff)
downloadlinux-dev-df47fc376df8338fdc9b27a5c9162a08f6e6157c.tar.xz
linux-dev-df47fc376df8338fdc9b27a5c9162a08f6e6157c.zip
selftests: add a test for bpf_prog_test_run_xattr
Make sure that bpf_prog_test_run_xattr returns the correct length and that the kernel respects the output size hint. Also check that errno indicates ENOSPC if there is a short output buffer given. Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/bpf/test_progs.c55
1 files changed, 54 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c
index 1c57abbe0945..26f1fdf3e2bf 100644
--- a/tools/testing/selftests/bpf/test_progs.c
+++ b/tools/testing/selftests/bpf/test_progs.c
@@ -70,7 +70,7 @@ static struct {
.tcp.urg_ptr = 123,
};
-#define CHECK(condition, tag, format...) ({ \
+#define _CHECK(condition, tag, duration, format...) ({ \
int __ret = !!(condition); \
if (__ret) { \
error_cnt++; \
@@ -83,6 +83,11 @@ static struct {
__ret; \
})
+#define CHECK(condition, tag, format...) \
+ _CHECK(condition, tag, duration, format)
+#define CHECK_ATTR(condition, tag, format...) \
+ _CHECK(condition, tag, tattr.duration, format)
+
static int bpf_find_map(const char *test, struct bpf_object *obj,
const char *name)
{
@@ -124,6 +129,53 @@ static void test_pkt_access(void)
bpf_object__close(obj);
}
+static void test_prog_run_xattr(void)
+{
+ const char *file = "./test_pkt_access.o";
+ struct bpf_object *obj;
+ char buf[10];
+ int err;
+ struct bpf_prog_test_run_attr tattr = {
+ .repeat = 1,
+ .data_in = &pkt_v4,
+ .data_size_in = sizeof(pkt_v4),
+ .data_out = buf,
+ .data_size_out = 5,
+ };
+
+ err = bpf_prog_load(file, BPF_PROG_TYPE_SCHED_CLS, &obj,
+ &tattr.prog_fd);
+ if (CHECK_ATTR(err, "load", "err %d errno %d\n", err, errno))
+ return;
+
+ memset(buf, 0, sizeof(buf));
+
+ err = bpf_prog_test_run_xattr(&tattr);
+ CHECK_ATTR(err != -1 || errno != ENOSPC || tattr.retval, "run",
+ "err %d errno %d retval %d\n", err, errno, tattr.retval);
+
+ CHECK_ATTR(tattr.data_size_out != sizeof(pkt_v4), "data_size_out",
+ "incorrect output size, want %lu have %u\n",
+ sizeof(pkt_v4), tattr.data_size_out);
+
+ CHECK_ATTR(buf[5] != 0, "overflow",
+ "BPF_PROG_TEST_RUN ignored size hint\n");
+
+ tattr.data_out = NULL;
+ tattr.data_size_out = 0;
+ errno = 0;
+
+ err = bpf_prog_test_run_xattr(&tattr);
+ CHECK_ATTR(err || errno || tattr.retval, "run_no_output",
+ "err %d errno %d retval %d\n", err, errno, tattr.retval);
+
+ tattr.data_size_out = 1;
+ err = bpf_prog_test_run_xattr(&tattr);
+ CHECK_ATTR(err != -EINVAL, "run_wrong_size_out", "err %d\n", err);
+
+ bpf_object__close(obj);
+}
+
static void test_xdp(void)
{
struct vip key4 = {.protocol = 6, .family = AF_INET};
@@ -1837,6 +1889,7 @@ int main(void)
jit_enabled = is_jit_enabled();
test_pkt_access();
+ test_prog_run_xattr();
test_xdp();
test_xdp_adjust_tail();
test_l4lb_all();