From: Joe Burton <jevburton@xxxxxxxxxx>
Tracing programs may now load with this hook. There is not yet a way to
invoke those programs.
Signed-off-by: Joe Burton <jevburton@xxxxxxxxxx>
---
kernel/bpf/map_trace.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/kernel/bpf/map_trace.c b/kernel/bpf/map_trace.c
index 77a55f8cd119..d7c52e197482 100644
--- a/kernel/bpf/map_trace.c
+++ b/kernel/bpf/map_trace.c
@@ -335,3 +335,26 @@ void bpf_trace_map_delete_elem(struct bpf_map *map,
bpf_map_trace_run_progs(map, BPF_MAP_TRACE_DELETE_ELEM, &ctx);
}
+DEFINE_BPF_MAP_TRACE_FUNC(BPF_MAP_TRACE_UPDATE_ELEM, void *key, void *value, u64 flags);
+DEFINE_BPF_MAP_TRACE_FUNC(BPF_MAP_TRACE_DELETE_ELEM, void *key);
+
+static struct bpf_map_trace_reg map_trace_update_elem_reg_info = {
+ .target = BPF_MAP_TRACE_FUNC(BPF_MAP_TRACE_UPDATE_ELEM),
+ .trace_type = BPF_MAP_TRACE_UPDATE_ELEM,
+};
+static struct bpf_map_trace_reg map_trace_delete_elem_reg_info = {
+ .target = BPF_MAP_TRACE_FUNC(BPF_MAP_TRACE_DELETE_ELEM),
+ .trace_type = BPF_MAP_TRACE_DELETE_ELEM,
+};
+
+static int __init bpf_map_trace_init(void)
+{
+ int err = bpf_map_trace_reg_target(&map_trace_update_elem_reg_info);
+
+ err = (err ? err :
+ bpf_map_trace_reg_target(&map_trace_delete_elem_reg_info));
+ return err;
+}
+
+late_initcall(bpf_map_trace_init);
+
--
2.33.0.685.g46640cef36-goog
