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-rw-r--r--tools/testing/selftests/bpf/prog_tests/tc_bpf.c395
-rw-r--r--tools/testing/selftests/bpf/progs/test_tc_bpf.c12
2 files changed, 407 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/tc_bpf.c b/tools/testing/selftests/bpf/prog_tests/tc_bpf.c
new file mode 100644
index 000000000000..4a505a5adf4d
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/tc_bpf.c
@@ -0,0 +1,395 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <test_progs.h>
+#include <linux/pkt_cls.h>
+
+#include "test_tc_bpf.skel.h"
+
+#define LO_IFINDEX 1
+
+#define TEST_DECLARE_OPTS(__fd) \
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_h, .handle = 1); \
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_p, .priority = 1); \
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_f, .prog_fd = __fd); \
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_hp, .handle = 1, .priority = 1); \
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_hf, .handle = 1, .prog_fd = __fd); \
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_pf, .priority = 1, .prog_fd = __fd); \
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_hpf, .handle = 1, .priority = 1, .prog_fd = __fd); \
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_hpi, .handle = 1, .priority = 1, .prog_id = 42); \
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_hpr, .handle = 1, .priority = 1, \
+ .flags = BPF_TC_F_REPLACE); \
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_hpfi, .handle = 1, .priority = 1, .prog_fd = __fd, \
+ .prog_id = 42); \
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_prio_max, .handle = 1, .priority = UINT16_MAX + 1);
+
+static int test_tc_bpf_basic(const struct bpf_tc_hook *hook, int fd)
+{
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts, .handle = 1, .priority = 1, .prog_fd = fd);
+ struct bpf_prog_info info = {};
+ __u32 info_len = sizeof(info);
+ int ret;
+
+ ret = bpf_obj_get_info_by_fd(fd, &info, &info_len);
+ if (!ASSERT_OK(ret, "bpf_obj_get_info_by_fd"))
+ return ret;
+
+ ret = bpf_tc_attach(hook, &opts);
+ if (!ASSERT_OK(ret, "bpf_tc_attach"))
+ return ret;
+
+ if (!ASSERT_EQ(opts.handle, 1, "handle set") ||
+ !ASSERT_EQ(opts.priority, 1, "priority set") ||
+ !ASSERT_EQ(opts.prog_id, info.id, "prog_id set"))
+ goto end;
+
+ opts.prog_id = 0;
+ opts.flags = BPF_TC_F_REPLACE;
+ ret = bpf_tc_attach(hook, &opts);
+ if (!ASSERT_OK(ret, "bpf_tc_attach replace mode"))
+ goto end;
+
+ opts.flags = opts.prog_fd = opts.prog_id = 0;
+ ret = bpf_tc_query(hook, &opts);
+ if (!ASSERT_OK(ret, "bpf_tc_query"))
+ goto end;
+
+ if (!ASSERT_EQ(opts.handle, 1, "handle set") ||
+ !ASSERT_EQ(opts.priority, 1, "priority set") ||
+ !ASSERT_EQ(opts.prog_id, info.id, "prog_id set"))
+ goto end;
+
+end:
+ opts.flags = opts.prog_fd = opts.prog_id = 0;
+ ret = bpf_tc_detach(hook, &opts);
+ ASSERT_OK(ret, "bpf_tc_detach");
+ return ret;
+}
+
+static int test_tc_bpf_api(struct bpf_tc_hook *hook, int fd)
+{
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, attach_opts, .handle = 1, .priority = 1, .prog_fd = fd);
+ DECLARE_LIBBPF_OPTS(bpf_tc_hook, inv_hook, .attach_point = BPF_TC_INGRESS);
+ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts, .handle = 1, .priority = 1);
+ int ret;
+
+ ret = bpf_tc_hook_create(NULL);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_create invalid hook = NULL"))
+ return -EINVAL;
+
+ /* hook ifindex = 0 */
+ ret = bpf_tc_hook_create(&inv_hook);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_create invalid hook ifindex == 0"))
+ return -EINVAL;
+
+ ret = bpf_tc_hook_destroy(&inv_hook);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_destroy invalid hook ifindex == 0"))
+ return -EINVAL;
+
+ ret = bpf_tc_attach(&inv_hook, &attach_opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid hook ifindex == 0"))
+ return -EINVAL;
+ attach_opts.prog_id = 0;
+
+ ret = bpf_tc_detach(&inv_hook, &opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid hook ifindex == 0"))
+ return -EINVAL;
+
+ ret = bpf_tc_query(&inv_hook, &opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid hook ifindex == 0"))
+ return -EINVAL;
+
+ /* hook ifindex < 0 */
+ inv_hook.ifindex = -1;
+
+ ret = bpf_tc_hook_create(&inv_hook);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_create invalid hook ifindex < 0"))
+ return -EINVAL;
+
+ ret = bpf_tc_hook_destroy(&inv_hook);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_destroy invalid hook ifindex < 0"))
+ return -EINVAL;
+
+ ret = bpf_tc_attach(&inv_hook, &attach_opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid hook ifindex < 0"))
+ return -EINVAL;
+ attach_opts.prog_id = 0;
+
+ ret = bpf_tc_detach(&inv_hook, &opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid hook ifindex < 0"))
+ return -EINVAL;
+
+ ret = bpf_tc_query(&inv_hook, &opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid hook ifindex < 0"))
+ return -EINVAL;
+
+ inv_hook.ifindex = LO_IFINDEX;
+
+ /* hook.attach_point invalid */
+ inv_hook.attach_point = 0xabcd;
+ ret = bpf_tc_hook_create(&inv_hook);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_create invalid hook.attach_point"))
+ return -EINVAL;
+
+ ret = bpf_tc_hook_destroy(&inv_hook);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_destroy invalid hook.attach_point"))
+ return -EINVAL;
+
+ ret = bpf_tc_attach(&inv_hook, &attach_opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid hook.attach_point"))
+ return -EINVAL;
+
+ ret = bpf_tc_detach(&inv_hook, &opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid hook.attach_point"))
+ return -EINVAL;
+
+ ret = bpf_tc_query(&inv_hook, &opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid hook.attach_point"))
+ return -EINVAL;
+
+ inv_hook.attach_point = BPF_TC_INGRESS;
+
+ /* hook.attach_point valid, but parent invalid */
+ inv_hook.parent = TC_H_MAKE(1UL << 16, 10);
+ ret = bpf_tc_hook_create(&inv_hook);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_create invalid hook parent"))
+ return -EINVAL;
+
+ ret = bpf_tc_hook_destroy(&inv_hook);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_destroy invalid hook parent"))
+ return -EINVAL;
+
+ ret = bpf_tc_attach(&inv_hook, &attach_opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid hook parent"))
+ return -EINVAL;
+
+ ret = bpf_tc_detach(&inv_hook, &opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid hook parent"))
+ return -EINVAL;
+
+ ret = bpf_tc_query(&inv_hook, &opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid hook parent"))
+ return -EINVAL;
+
+ inv_hook.attach_point = BPF_TC_CUSTOM;
+ inv_hook.parent = 0;
+ /* These return EOPNOTSUPP instead of EINVAL as parent is checked after
+ * attach_point of the hook.
+ */
+ ret = bpf_tc_hook_create(&inv_hook);
+ if (!ASSERT_EQ(ret, -EOPNOTSUPP, "bpf_tc_hook_create invalid hook parent"))
+ return -EINVAL;
+
+ ret = bpf_tc_hook_destroy(&inv_hook);
+ if (!ASSERT_EQ(ret, -EOPNOTSUPP, "bpf_tc_hook_destroy invalid hook parent"))
+ return -EINVAL;
+
+ ret = bpf_tc_attach(&inv_hook, &attach_opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid hook parent"))
+ return -EINVAL;
+
+ ret = bpf_tc_detach(&inv_hook, &opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid hook parent"))
+ return -EINVAL;
+
+ ret = bpf_tc_query(&inv_hook, &opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid hook parent"))
+ return -EINVAL;
+
+ inv_hook.attach_point = BPF_TC_INGRESS;
+
+ /* detach */
+ {
+ TEST_DECLARE_OPTS(fd);
+
+ ret = bpf_tc_detach(NULL, &opts_hp);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid hook = NULL"))
+ return -EINVAL;
+
+ ret = bpf_tc_detach(hook, NULL);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid opts = NULL"))
+ return -EINVAL;
+
+ ret = bpf_tc_detach(hook, &opts_hpr);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid flags set"))
+ return -EINVAL;
+
+ ret = bpf_tc_detach(hook, &opts_hpf);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid prog_fd set"))
+ return -EINVAL;
+
+ ret = bpf_tc_detach(hook, &opts_hpi);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid prog_id set"))
+ return -EINVAL;
+
+ ret = bpf_tc_detach(hook, &opts_p);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid handle unset"))
+ return -EINVAL;
+
+ ret = bpf_tc_detach(hook, &opts_h);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid priority unset"))
+ return -EINVAL;
+
+ ret = bpf_tc_detach(hook, &opts_prio_max);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid priority > UINT16_MAX"))
+ return -EINVAL;
+ }
+
+ /* query */
+ {
+ TEST_DECLARE_OPTS(fd);
+
+ ret = bpf_tc_query(NULL, &opts);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid hook = NULL"))
+ return -EINVAL;
+
+ ret = bpf_tc_query(hook, NULL);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid opts = NULL"))
+ return -EINVAL;
+
+ ret = bpf_tc_query(hook, &opts_hpr);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid flags set"))
+ return -EINVAL;
+
+ ret = bpf_tc_query(hook, &opts_hpf);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid prog_fd set"))
+ return -EINVAL;
+
+ ret = bpf_tc_query(hook, &opts_hpi);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid prog_id set"))
+ return -EINVAL;
+
+ ret = bpf_tc_query(hook, &opts_p);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid handle unset"))
+ return -EINVAL;
+
+ ret = bpf_tc_query(hook, &opts_h);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid priority unset"))
+ return -EINVAL;
+
+ ret = bpf_tc_query(hook, &opts_prio_max);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid priority > UINT16_MAX"))
+ return -EINVAL;
+
+ /* when chain is not present, kernel returns -EINVAL */
+ ret = bpf_tc_query(hook, &opts_hp);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query valid handle, priority set"))
+ return -EINVAL;
+ }
+
+ /* attach */
+ {
+ TEST_DECLARE_OPTS(fd);
+
+ ret = bpf_tc_attach(NULL, &opts_hp);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid hook = NULL"))
+ return -EINVAL;
+
+ ret = bpf_tc_attach(hook, NULL);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid opts = NULL"))
+ return -EINVAL;
+
+ opts_hp.flags = 42;
+ ret = bpf_tc_attach(hook, &opts_hp);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid flags"))
+ return -EINVAL;
+
+ ret = bpf_tc_attach(hook, NULL);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid prog_fd unset"))
+ return -EINVAL;
+
+ ret = bpf_tc_attach(hook, &opts_hpi);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid prog_id set"))
+ return -EINVAL;
+
+ ret = bpf_tc_attach(hook, &opts_pf);
+ if (!ASSERT_OK(ret, "bpf_tc_attach valid handle unset"))
+ return -EINVAL;
+ opts_pf.prog_fd = opts_pf.prog_id = 0;
+ ASSERT_OK(bpf_tc_detach(hook, &opts_pf), "bpf_tc_detach");
+
+ ret = bpf_tc_attach(hook, &opts_hf);
+ if (!ASSERT_OK(ret, "bpf_tc_attach valid priority unset"))
+ return -EINVAL;
+ opts_hf.prog_fd = opts_hf.prog_id = 0;
+ ASSERT_OK(bpf_tc_detach(hook, &opts_hf), "bpf_tc_detach");
+
+ ret = bpf_tc_attach(hook, &opts_prio_max);
+ if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid priority > UINT16_MAX"))
+ return -EINVAL;
+
+ ret = bpf_tc_attach(hook, &opts_f);
+ if (!ASSERT_OK(ret, "bpf_tc_attach valid both handle and priority unset"))
+ return -EINVAL;
+ opts_f.prog_fd = opts_f.prog_id = 0;
+ ASSERT_OK(bpf_tc_detach(hook, &opts_f), "bpf_tc_detach");
+ }
+
+ return 0;
+}
+
+void test_tc_bpf(void)
+{
+ DECLARE_LIBBPF_OPTS(bpf_tc_hook, hook, .ifindex = LO_IFINDEX,
+ .attach_point = BPF_TC_INGRESS);
+ struct test_tc_bpf *skel = NULL;
+ bool hook_created = false;
+ int cls_fd, ret;
+
+ skel = test_tc_bpf__open_and_load();
+ if (!ASSERT_OK_PTR(skel, "test_tc_bpf__open_and_load"))
+ return;
+
+ cls_fd = bpf_program__fd(skel->progs.cls);
+
+ ret = bpf_tc_hook_create(&hook);
+ if (ret == 0)
+ hook_created = true;
+
+ ret = ret == -EEXIST ? 0 : ret;
+ if (!ASSERT_OK(ret, "bpf_tc_hook_create(BPF_TC_INGRESS)"))
+ goto end;
+
+ hook.attach_point = BPF_TC_CUSTOM;
+ hook.parent = TC_H_MAKE(TC_H_CLSACT, TC_H_MIN_INGRESS);
+ ret = bpf_tc_hook_create(&hook);
+ if (!ASSERT_EQ(ret, -EOPNOTSUPP, "bpf_tc_hook_create invalid hook.attach_point"))
+ goto end;
+
+ ret = test_tc_bpf_basic(&hook, cls_fd);
+ if (!ASSERT_OK(ret, "test_tc_internal ingress"))
+ goto end;
+
+ ret = bpf_tc_hook_destroy(&hook);
+ if (!ASSERT_EQ(ret, -EOPNOTSUPP, "bpf_tc_hook_destroy invalid hook.attach_point"))
+ goto end;
+
+ hook.attach_point = BPF_TC_INGRESS;
+ hook.parent = 0;
+ bpf_tc_hook_destroy(&hook);
+
+ ret = test_tc_bpf_basic(&hook, cls_fd);
+ if (!ASSERT_OK(ret, "test_tc_internal ingress"))
+ goto end;
+
+ bpf_tc_hook_destroy(&hook);
+
+ hook.attach_point = BPF_TC_EGRESS;
+ ret = test_tc_bpf_basic(&hook, cls_fd);
+ if (!ASSERT_OK(ret, "test_tc_internal egress"))
+ goto end;
+
+ bpf_tc_hook_destroy(&hook);
+
+ ret = test_tc_bpf_api(&hook, cls_fd);
+ if (!ASSERT_OK(ret, "test_tc_bpf_api"))
+ goto end;
+
+ bpf_tc_hook_destroy(&hook);
+
+end:
+ if (hook_created) {
+ hook.attach_point = BPF_TC_INGRESS | BPF_TC_EGRESS;
+ bpf_tc_hook_destroy(&hook);
+ }
+ test_tc_bpf__destroy(skel);
+}
diff --git a/tools/testing/selftests/bpf/progs/test_tc_bpf.c b/tools/testing/selftests/bpf/progs/test_tc_bpf.c
new file mode 100644
index 000000000000..18a3a7ed924a
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/test_tc_bpf.c
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+
+/* Dummy prog to test TC-BPF API */
+
+SEC("classifier")
+int cls(struct __sk_buff *skb)
+{
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-14 09:29:12 +0000