This patch allows eBPF programs that use sock_ops to send
perf-based event notifications using bpf_perf_event_output()
Signed-off-by: Sowmini Varadhan <sowmini.varad...@oracle.com>
---
net/core/filter.c | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/net/core/filter.c b/net/core/filter.c
index e521c5e..23464a3 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -4048,6 +4048,23 @@ static unsigned long bpf_xdp_copy(void *dst_buff, const
void *src_buff,
return ret;
}
+BPF_CALL_5(bpf_sock_opts_event_output, struct bpf_sock_ops *, skops,
+ struct bpf_map *, map, u64, flags, void *, data, u64, size)
+{
+ return bpf_event_output(map, flags, data, size, NULL, 0, NULL);
+}
+
+static const struct bpf_func_proto bpf_sock_ops_event_output_proto = {
+ .func = bpf_sock_opts_event_output,
+ .gpl_only = true,
+ .ret_type = RET_INTEGER,
+ .arg1_type = ARG_PTR_TO_CTX,
+ .arg2_type = ARG_CONST_MAP_PTR,
+ .arg3_type = ARG_ANYTHING,
+ .arg4_type = ARG_PTR_TO_MEM,
+ .arg5_type = ARG_CONST_SIZE_OR_ZERO,
+};
+
static const struct bpf_func_proto bpf_setsockopt_proto = {
.func = bpf_setsockopt,
.gpl_only = false,
@@ -5226,6 +5243,8 @@ bool bpf_helper_changes_pkt_data(void *func)
sock_ops_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
{
switch (func_id) {
+ case BPF_FUNC_perf_event_output:
+ return &bpf_sock_ops_event_output_proto;
case BPF_FUNC_setsockopt:
return &bpf_setsockopt_proto;
case BPF_FUNC_getsockopt:
--
1.7.1
