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Message-Id: <49ce684b1de9d926c9df27e58e67afabbe6093cf.1641641663.git.lorenzo@kernel.org>
Date: Sat, 8 Jan 2022 12:53:25 +0100
From: Lorenzo Bianconi <lorenzo@...nel.org>
To: bpf@...r.kernel.org, netdev@...r.kernel.org
Cc: lorenzo.bianconi@...hat.com, davem@...emloft.net, kuba@...nel.org,
ast@...nel.org, daniel@...earbox.net, shayagr@...zon.com,
john.fastabend@...il.com, dsahern@...nel.org, brouer@...hat.com,
echaudro@...hat.com, jasowang@...hat.com,
alexander.duyck@...il.com, saeed@...nel.org,
maciej.fijalkowski@...el.com, magnus.karlsson@...el.com,
tirthendu.sarkar@...el.com, toke@...hat.com
Subject: [PATCH v21 bpf-next 22/23] bpf: selftests: add CPUMAP/DEVMAP selftests for xdp multi-buff
Verify compatibility checks attaching a XDP multi-buff program to a
CPUMAP/DEVMAP
Acked-by: Toke Hoiland-Jorgensen <toke@...hat.com>
Acked-by: John Fastabend <john.fastabend@...il.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
.../bpf/prog_tests/xdp_cpumap_attach.c | 65 ++++++++++++++++++-
.../bpf/prog_tests/xdp_devmap_attach.c | 56 ++++++++++++++++
.../bpf/progs/test_xdp_with_cpumap_helpers.c | 6 ++
.../progs/test_xdp_with_cpumap_mb_helpers.c | 27 ++++++++
.../bpf/progs/test_xdp_with_devmap_helpers.c | 7 ++
.../progs/test_xdp_with_devmap_mb_helpers.c | 27 ++++++++
6 files changed, 187 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_with_cpumap_mb_helpers.c
create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_with_devmap_mb_helpers.c
diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c b/tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c
index fd812bd43600..ee580b50a945 100644
--- a/tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c
+++ b/tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c
@@ -3,11 +3,12 @@
#include <linux/if_link.h>
#include <test_progs.h>
+#include "test_xdp_with_cpumap_mb_helpers.skel.h"
#include "test_xdp_with_cpumap_helpers.skel.h"
#define IFINDEX_LO 1
-void serial_test_xdp_cpumap_attach(void)
+void test_xdp_with_cpumap_helpers(void)
{
struct test_xdp_with_cpumap_helpers *skel;
struct bpf_prog_info info = {};
@@ -54,6 +55,68 @@ void serial_test_xdp_cpumap_attach(void)
err = bpf_map_update_elem(map_fd, &idx, &val, 0);
ASSERT_NEQ(err, 0, "Add non-BPF_XDP_CPUMAP program to cpumap entry");
+ /* try to attach BPF_XDP_CPUMAP multi-buff program when we have already
+ * loaded a legacy XDP program on the map
+ */
+ idx = 1;
+ val.qsize = 192;
+ val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_cm_mb);
+ err = bpf_map_update_elem(map_fd, &idx, &val, 0);
+ ASSERT_NEQ(err, 0,
+ "Add BPF_XDP_CPUMAP multi-buff program to cpumap entry");
+
out_close:
test_xdp_with_cpumap_helpers__destroy(skel);
}
+
+void test_xdp_with_cpumap_mb_helpers(void)
+{
+ struct test_xdp_with_cpumap_mb_helpers *skel;
+ struct bpf_prog_info info = {};
+ __u32 len = sizeof(info);
+ struct bpf_cpumap_val val = {
+ .qsize = 192,
+ };
+ int err, mb_prog_fd, map_fd;
+ __u32 idx = 0;
+
+ skel = test_xdp_with_cpumap_mb_helpers__open_and_load();
+ if (!ASSERT_OK_PTR(skel, "test_xdp_with_cpumap_helpers__open_and_load"))
+ return;
+
+ mb_prog_fd = bpf_program__fd(skel->progs.xdp_dummy_cm_mb);
+ map_fd = bpf_map__fd(skel->maps.cpu_map);
+ err = bpf_obj_get_info_by_fd(mb_prog_fd, &info, &len);
+ if (!ASSERT_OK(err, "bpf_obj_get_info_by_fd"))
+ goto out_close;
+
+ val.bpf_prog.fd = mb_prog_fd;
+ err = bpf_map_update_elem(map_fd, &idx, &val, 0);
+ ASSERT_OK(err, "Add program to cpumap entry");
+
+ err = bpf_map_lookup_elem(map_fd, &idx, &val);
+ ASSERT_OK(err, "Read cpumap entry");
+ ASSERT_EQ(info.id, val.bpf_prog.id,
+ "Match program id to cpumap entry prog_id");
+
+ /* try to attach BPF_XDP_CPUMAP program when we have already
+ * loaded a multi-buff XDP program on the map
+ */
+ idx = 1;
+ val.qsize = 192;
+ val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_cm);
+ err = bpf_map_update_elem(map_fd, &idx, &val, 0);
+ ASSERT_NEQ(err, 0, "Add BPF_XDP_CPUMAP program to cpumap entry");
+
+out_close:
+ test_xdp_with_cpumap_mb_helpers__destroy(skel);
+}
+
+void serial_test_xdp_cpumap_attach(void)
+{
+ if (test__start_subtest("CPUMAP with programs in entries"))
+ test_xdp_with_cpumap_helpers();
+
+ if (test__start_subtest("CPUMAP with multi-buff programs in entries"))
+ test_xdp_with_cpumap_mb_helpers();
+}
diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_devmap_attach.c b/tools/testing/selftests/bpf/prog_tests/xdp_devmap_attach.c
index 3079d5568f8f..5c0dc3c20fc9 100644
--- a/tools/testing/selftests/bpf/prog_tests/xdp_devmap_attach.c
+++ b/tools/testing/selftests/bpf/prog_tests/xdp_devmap_attach.c
@@ -4,6 +4,7 @@
#include <test_progs.h>
#include "test_xdp_devmap_helpers.skel.h"
+#include "test_xdp_with_devmap_mb_helpers.skel.h"
#include "test_xdp_with_devmap_helpers.skel.h"
#define IFINDEX_LO 1
@@ -56,6 +57,16 @@ static void test_xdp_with_devmap_helpers(void)
err = bpf_map_update_elem(map_fd, &idx, &val, 0);
ASSERT_NEQ(err, 0, "Add non-BPF_XDP_DEVMAP program to devmap entry");
+ /* try to attach BPF_XDP_DEVMAP multi-buff program when we have already
+ * loaded a legacy XDP program on the map
+ */
+ idx = 1;
+ val.ifindex = 1;
+ val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_dm_mb);
+ err = bpf_map_update_elem(map_fd, &idx, &val, 0);
+ ASSERT_NEQ(err, 0,
+ "Add BPF_XDP_DEVMAP multi-buff program to devmap entry");
+
out_close:
test_xdp_with_devmap_helpers__destroy(skel);
}
@@ -71,12 +82,57 @@ static void test_neg_xdp_devmap_helpers(void)
}
}
+void test_xdp_with_devmap_mb_helpers(void)
+{
+ struct test_xdp_with_devmap_mb_helpers *skel;
+ struct bpf_prog_info info = {};
+ struct bpf_devmap_val val = {
+ .ifindex = IFINDEX_LO,
+ };
+ __u32 len = sizeof(info);
+ int err, dm_fd_mb, map_fd;
+ __u32 idx = 0;
+
+ skel = test_xdp_with_devmap_mb_helpers__open_and_load();
+ if (!ASSERT_OK_PTR(skel, "test_xdp_with_devmap_helpers__open_and_load"))
+ return;
+
+ dm_fd_mb = bpf_program__fd(skel->progs.xdp_dummy_dm_mb);
+ map_fd = bpf_map__fd(skel->maps.dm_ports);
+ err = bpf_obj_get_info_by_fd(dm_fd_mb, &info, &len);
+ if (!ASSERT_OK(err, "bpf_obj_get_info_by_fd"))
+ goto out_close;
+
+ val.bpf_prog.fd = dm_fd_mb;
+ err = bpf_map_update_elem(map_fd, &idx, &val, 0);
+ ASSERT_OK(err, "Add multi-buff program to devmap entry");
+
+ err = bpf_map_lookup_elem(map_fd, &idx, &val);
+ ASSERT_OK(err, "Read devmap entry");
+ ASSERT_EQ(info.id, val.bpf_prog.id,
+ "Match program id to devmap entry prog_id");
+
+ /* try to attach BPF_XDP_DEVMAP program when we have already loaded a
+ * multi-buff XDP program on the map
+ */
+ idx = 1;
+ val.ifindex = 1;
+ val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_dm);
+ err = bpf_map_update_elem(map_fd, &idx, &val, 0);
+ ASSERT_NEQ(err, 0, "Add BPF_XDP_DEVMAP program to devmap entry");
+
+out_close:
+ test_xdp_with_devmap_mb_helpers__destroy(skel);
+}
void serial_test_xdp_devmap_attach(void)
{
if (test__start_subtest("DEVMAP with programs in entries"))
test_xdp_with_devmap_helpers();
+ if (test__start_subtest("DEVMAP with multi-buff programs in entries"))
+ test_xdp_with_devmap_mb_helpers();
+
if (test__start_subtest("Verifier check of DEVMAP programs"))
test_neg_xdp_devmap_helpers();
}
diff --git a/tools/testing/selftests/bpf/progs/test_xdp_with_cpumap_helpers.c b/tools/testing/selftests/bpf/progs/test_xdp_with_cpumap_helpers.c
index 532025057711..f32e4dab1751 100644
--- a/tools/testing/selftests/bpf/progs/test_xdp_with_cpumap_helpers.c
+++ b/tools/testing/selftests/bpf/progs/test_xdp_with_cpumap_helpers.c
@@ -33,4 +33,10 @@ int xdp_dummy_cm(struct xdp_md *ctx)
return XDP_PASS;
}
+SEC("xdp_cpumap_mb/mb_dummy_cm")
+int xdp_dummy_cm_mb(struct xdp_md *ctx)
+{
+ return XDP_PASS;
+}
+
char _license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/progs/test_xdp_with_cpumap_mb_helpers.c b/tools/testing/selftests/bpf/progs/test_xdp_with_cpumap_mb_helpers.c
new file mode 100644
index 000000000000..96eedbaef71b
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/test_xdp_with_cpumap_mb_helpers.c
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+
+#define IFINDEX_LO 1
+
+struct {
+ __uint(type, BPF_MAP_TYPE_CPUMAP);
+ __uint(key_size, sizeof(__u32));
+ __uint(value_size, sizeof(struct bpf_cpumap_val));
+ __uint(max_entries, 4);
+} cpu_map SEC(".maps");
+
+SEC("xdp_cpumap/dummy_cm")
+int xdp_dummy_cm(struct xdp_md *ctx)
+{
+ return XDP_PASS;
+}
+
+SEC("xdp_cpumap_mb/mb_dummy_cm")
+int xdp_dummy_cm_mb(struct xdp_md *ctx)
+{
+ return XDP_PASS;
+}
+
+char _license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/progs/test_xdp_with_devmap_helpers.c b/tools/testing/selftests/bpf/progs/test_xdp_with_devmap_helpers.c
index 1e6b9c38ea6d..691f2d70dedc 100644
--- a/tools/testing/selftests/bpf/progs/test_xdp_with_devmap_helpers.c
+++ b/tools/testing/selftests/bpf/progs/test_xdp_with_devmap_helpers.c
@@ -40,4 +40,11 @@ int xdp_dummy_dm(struct xdp_md *ctx)
return XDP_PASS;
}
+
+SEC("xdp_devmap_mb/mp_map_prog")
+int xdp_dummy_dm_mb(struct xdp_md *ctx)
+{
+ return XDP_PASS;
+}
+
char _license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/progs/test_xdp_with_devmap_mb_helpers.c b/tools/testing/selftests/bpf/progs/test_xdp_with_devmap_mb_helpers.c
new file mode 100644
index 000000000000..05221b1fd9f2
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/test_xdp_with_devmap_mb_helpers.c
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+
+struct {
+ __uint(type, BPF_MAP_TYPE_DEVMAP);
+ __uint(key_size, sizeof(__u32));
+ __uint(value_size, sizeof(struct bpf_devmap_val));
+ __uint(max_entries, 4);
+} dm_ports SEC(".maps");
+
+/* valid program on DEVMAP entry via SEC name;
+ * has access to egress and ingress ifindex
+ */
+SEC("xdp_devmap/map_prog")
+int xdp_dummy_dm(struct xdp_md *ctx)
+{
+ return XDP_PASS;
+}
+
+SEC("xdp_devmap_mb/mp_map_prog")
+int xdp_dummy_dm_mb(struct xdp_md *ctx)
+{
+ return XDP_PASS;
+}
+
+char _license[] SEC("license") = "GPL";
--
2.33.1
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