Introduce support SEC("xdp_mb") as a short cut for loading
the program with type BPF_PROG_TYPE_XDP that fully supports
XDP multi-buffer.
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
---
tools/lib/bpf/libbpf.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index ae0889bebe32..d5ae2716d08b 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -244,6 +244,8 @@ enum sec_def_flags {
SEC_SLEEPABLE = 8,
/* allow non-strict prefix matching */
SEC_SLOPPY_PFX = 16,
+ /* BPF program support XDP multi-buff */
+ SEC_XDP_MB = 32,
};
struct bpf_sec_def {
@@ -6171,6 +6173,9 @@ static int libbpf_preload_prog(struct bpf_program *prog,
if (def & SEC_SLEEPABLE)
attr->prog_flags |= BPF_F_SLEEPABLE;
+ if (prog->type == BPF_PROG_TYPE_XDP && (def & SEC_XDP_MB))
+ attr->prog_flags |= BPF_F_XDP_MB;
+
if ((prog->type == BPF_PROG_TYPE_TRACING ||
prog->type == BPF_PROG_TYPE_LSM ||
prog->type == BPF_PROG_TYPE_EXT) && !prog->attach_btf_id) {
@@ -8094,6 +8099,7 @@ static const struct bpf_sec_def section_defs[] = {
SEC_DEF("xdp_devmap/", XDP, BPF_XDP_DEVMAP, SEC_ATTACHABLE),
SEC_DEF("xdp_cpumap/", XDP, BPF_XDP_CPUMAP, SEC_ATTACHABLE),
SEC_DEF("xdp", XDP, BPF_XDP, SEC_ATTACHABLE_OPT | SEC_SLOPPY_PFX),
+ SEC_DEF("xdp_mb/", XDP, BPF_XDP, SEC_ATTACHABLE_OPT | SEC_SLOPPY_PFX | SEC_XDP_MB),
SEC_DEF("perf_event", PERF_EVENT, 0, SEC_NONE | SEC_SLOPPY_PFX),
SEC_DEF("lwt_in", LWT_IN, 0, SEC_NONE | SEC_SLOPPY_PFX),
SEC_DEF("lwt_out", LWT_OUT, 0, SEC_NONE | SEC_SLOPPY_PFX),
--
2.31.1
