Add a new function, which encourages safe usage of the test interface.
bpf_prog_test_run continues to work as before, but should be considered
unsafe.
Signed-off-by: Lorenz Bauer <lmb@xxxxxxxxxxxxxx>
---
tools/lib/bpf/bpf.c | 27 +++++++++++++++++++++++++++
tools/lib/bpf/bpf.h | 13 +++++++++++++
2 files changed, 40 insertions(+)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 961e1b9fc592..f8518bef6886 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -424,6 +424,33 @@ int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,
return ret;
}
+int bpf_prog_test_run_xattr(const struct bpf_prog_test_run_attr *test_attr,
+ __u32 *size_out, __u32 *retval, __u32 *duration)
+{
+ union bpf_attr attr;
+ int ret;
+
+ if (!test_attr->data_out && test_attr->size_out > 0)
+ return -EINVAL;
+
+ bzero(&attr, sizeof(attr));
+ attr.test.prog_fd = test_attr->prog_fd;
+ attr.test.data_in = ptr_to_u64(test_attr->data);
+ attr.test.data_out = ptr_to_u64(test_attr->data_out);
+ attr.test.data_size_in = test_attr->size;
+ attr.test.data_size_out = test_attr->size_out;
+ attr.test.repeat = test_attr->repeat;
+
+ ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, sizeof(attr));
+ if (size_out)
+ *size_out = attr.test.data_size_out;
+ if (retval)
+ *retval = attr.test.retval;
+ if (duration)
+ *duration = attr.test.duration;
+ return ret;
+}
+
int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id)
{
union bpf_attr attr;
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 26a51538213c..570f19f77f42 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -110,6 +110,19 @@ LIBBPF_API int bpf_prog_attach(int prog_fd, int attachable_fd,
LIBBPF_API int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type);
LIBBPF_API int bpf_prog_detach2(int prog_fd, int attachable_fd,
enum bpf_attach_type type);
+
+struct bpf_prog_test_run_attr {
+ int prog_fd;
+ int repeat;
+ const void *data;
+ __u32 size;
+ void *data_out; /* optional */
+ __u32 size_out;
+};
+
+LIBBPF_API int bpf_prog_test_run_xattr(const struct bpf_prog_test_run_attr *test_attr,
+ __u32 *size_out, __u32 *retval,
+ __u32 *duration);
LIBBPF_API int bpf_prog_test_run(int prog_fd, int repeat, void *data,
__u32 size, void *data_out, __u32 *size_out,
__u32 *retval, __u32 *duration);
--
2.17.1
