diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/xdp_adjust_frags.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/xdp_adjust_frags.c | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_adjust_frags.c b/tools/testing/selftests/bpf/prog_tests/xdp_adjust_frags.c index d18e6f343c48..2f033da4cd45 100644 --- a/tools/testing/selftests/bpf/prog_tests/xdp_adjust_frags.c +++ b/tools/testing/selftests/bpf/prog_tests/xdp_adjust_frags.c @@ -5,11 +5,12 @@ static void test_xdp_update_frags(void) { const char *file = "./test_xdp_update_frags.o"; + int err, prog_fd, max_skb_frags, buf_size, num; struct bpf_program *prog; struct bpf_object *obj; - int err, prog_fd; __u32 *offset; __u8 *buf; + FILE *f; LIBBPF_OPTS(bpf_test_run_opts, topts); obj = bpf_object__open(file); @@ -99,6 +100,41 @@ static void test_xdp_update_frags(void) ASSERT_EQ(buf[7621], 0xbb, "xdp_update_frag buf[7621]"); free(buf); + + /* test_xdp_update_frags: unsupported buffer size */ + f = fopen("/proc/sys/net/core/max_skb_frags", "r"); + if (!ASSERT_OK_PTR(f, "max_skb_frag file pointer")) + goto out; + + num = fscanf(f, "%d", &max_skb_frags); + fclose(f); + + if (!ASSERT_EQ(num, 1, "max_skb_frags read failed")) + goto out; + + /* xdp_buff linear area size is always set to 4096 in the + * bpf_prog_test_run_xdp routine. + */ + buf_size = 4096 + (max_skb_frags + 1) * sysconf(_SC_PAGE_SIZE); + buf = malloc(buf_size); + if (!ASSERT_OK_PTR(buf, "alloc buf")) + goto out; + + memset(buf, 0, buf_size); + offset = (__u32 *)buf; + *offset = 16; + buf[*offset] = 0xaa; + buf[*offset + 15] = 0xaa; + + topts.data_in = buf; + topts.data_out = buf; + topts.data_size_in = buf_size; + topts.data_size_out = buf_size; + + err = bpf_prog_test_run_opts(prog_fd, &topts); + ASSERT_EQ(err, -ENOMEM, + "unsupported buf size, possible non-default /proc/sys/net/core/max_skb_flags?"); + free(buf); out: bpf_object__close(obj); } |