diff options
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c | 105 | ||||
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_xdp_context_test_run.c | 20 |
2 files changed, 125 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c b/tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c new file mode 100644 index 000000000000..ab4952b9fb1d --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <test_progs.h> +#include <network_helpers.h> +#include "test_xdp_context_test_run.skel.h" + +void test_xdp_context_error(int prog_fd, struct bpf_test_run_opts opts, + __u32 data_meta, __u32 data, __u32 data_end, + __u32 ingress_ifindex, __u32 rx_queue_index, + __u32 egress_ifindex) +{ + struct xdp_md ctx = { + .data = data, + .data_end = data_end, + .data_meta = data_meta, + .ingress_ifindex = ingress_ifindex, + .rx_queue_index = rx_queue_index, + .egress_ifindex = egress_ifindex, + }; + int err; + + opts.ctx_in = &ctx; + opts.ctx_size_in = sizeof(ctx); + err = bpf_prog_test_run_opts(prog_fd, &opts); + ASSERT_EQ(errno, EINVAL, "errno-EINVAL"); + ASSERT_ERR(err, "bpf_prog_test_run"); +} + +void test_xdp_context_test_run(void) +{ + struct test_xdp_context_test_run *skel = NULL; + char data[sizeof(pkt_v4) + sizeof(__u32)]; + char bad_ctx[sizeof(struct xdp_md) + 1]; + struct xdp_md ctx_in, ctx_out; + DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts, + .data_in = &data, + .data_size_in = sizeof(data), + .ctx_out = &ctx_out, + .ctx_size_out = sizeof(ctx_out), + .repeat = 1, + ); + int err, prog_fd; + + skel = test_xdp_context_test_run__open_and_load(); + if (!ASSERT_OK_PTR(skel, "skel")) + return; + prog_fd = bpf_program__fd(skel->progs.xdp_context); + + /* Data past the end of the kernel's struct xdp_md must be 0 */ + bad_ctx[sizeof(bad_ctx) - 1] = 1; + opts.ctx_in = bad_ctx; + opts.ctx_size_in = sizeof(bad_ctx); + err = bpf_prog_test_run_opts(prog_fd, &opts); + ASSERT_EQ(errno, E2BIG, "extradata-errno"); + ASSERT_ERR(err, "bpf_prog_test_run(extradata)"); + + *(__u32 *)data = XDP_PASS; + *(struct ipv4_packet *)(data + sizeof(__u32)) = pkt_v4; + opts.ctx_in = &ctx_in; + opts.ctx_size_in = sizeof(ctx_in); + memset(&ctx_in, 0, sizeof(ctx_in)); + ctx_in.data_meta = 0; + ctx_in.data = sizeof(__u32); + ctx_in.data_end = ctx_in.data + sizeof(pkt_v4); + err = bpf_prog_test_run_opts(prog_fd, &opts); + ASSERT_OK(err, "bpf_prog_test_run(valid)"); + ASSERT_EQ(opts.retval, XDP_PASS, "valid-retval"); + ASSERT_EQ(opts.data_size_out, sizeof(pkt_v4), "valid-datasize"); + ASSERT_EQ(opts.ctx_size_out, opts.ctx_size_in, "valid-ctxsize"); + ASSERT_EQ(ctx_out.data_meta, 0, "valid-datameta"); + ASSERT_EQ(ctx_out.data, 0, "valid-data"); + ASSERT_EQ(ctx_out.data_end, sizeof(pkt_v4), "valid-dataend"); + + /* Meta data's size must be a multiple of 4 */ + test_xdp_context_error(prog_fd, opts, 0, 1, sizeof(data), 0, 0, 0); + + /* data_meta must reference the start of data */ + test_xdp_context_error(prog_fd, opts, 4, sizeof(__u32), sizeof(data), + 0, 0, 0); + + /* Meta data must be 32 bytes or smaller */ + test_xdp_context_error(prog_fd, opts, 0, 36, sizeof(data), 0, 0, 0); + + /* Total size of data must match data_end - data_meta */ + test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32), + sizeof(data) - 1, 0, 0, 0); + test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32), + sizeof(data) + 1, 0, 0, 0); + + /* RX queue cannot be specified without specifying an ingress */ + test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32), sizeof(data), + 0, 1, 0); + + /* Interface 1 is always the loopback interface which always has only + * one RX queue (index 0). This makes index 1 an invalid rx queue index + * for interface 1. + */ + test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32), sizeof(data), + 1, 1, 0); + + /* The egress cannot be specified */ + test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32), sizeof(data), + 0, 0, 1); + + test_xdp_context_test_run__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/progs/test_xdp_context_test_run.c b/tools/testing/selftests/bpf/progs/test_xdp_context_test_run.c new file mode 100644 index 000000000000..d7b88cd05afd --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_xdp_context_test_run.c @@ -0,0 +1,20 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/bpf.h> +#include <bpf/bpf_helpers.h> + +SEC("xdp") +int xdp_context(struct xdp_md *xdp) +{ + void *data = (void *)(long)xdp->data; + __u32 *metadata = (void *)(long)xdp->data_meta; + __u32 ret; + + if (metadata + 1 > data) + return XDP_ABORTED; + ret = *metadata; + if (bpf_xdp_adjust_meta(xdp, 4)) + return XDP_ABORTED; + return ret; +} + +char _license[] SEC("license") = "GPL"; |