netdev - [RFC PATCH 13/17] libbpf: Add support for dequeue program type and PIFO map type

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Message-Id: <20220713111430.134810-14-toke@redhat.com>
Date:   Wed, 13 Jul 2022 13:14:21 +0200
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>
Cc:     Kumar Kartikeya Dwivedi <memxor@...il.com>, netdev@...r.kernel.org,
        bpf@...r.kernel.org,
        Freysteinn Alfredsson <freysteinn.alfredsson@....se>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Toke Høiland-Jørgensen <toke@...hat.com>
Subject: [RFC PATCH 13/17] libbpf: Add support for dequeue program type and PIFO map type

Add support for a 'dequeue' section type to specify dequeue type programs
and add support for dequeue program and PIFO map to probing code.

Signed-off-by: Toke Høiland-Jørgensen <toke@...hat.com>
---
 tools/lib/bpf/libbpf.c        | 1 +
 tools/lib/bpf/libbpf_probes.c | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index cb49408eb298..8553bb8369e0 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -8431,6 +8431,7 @@ static const struct bpf_sec_def section_defs[] = {
 	SEC_DEF("xdp/cpumap",		XDP, BPF_XDP_CPUMAP, SEC_ATTACHABLE),
 	SEC_DEF("xdp.frags",		XDP, BPF_XDP, SEC_XDP_FRAGS),
 	SEC_DEF("xdp",			XDP, BPF_XDP, SEC_ATTACHABLE_OPT),
+	SEC_DEF("dequeue",		DEQUEUE, 0, SEC_NONE),
 	SEC_DEF("perf_event",		PERF_EVENT, 0, SEC_NONE),
 	SEC_DEF("lwt_in",		LWT_IN, 0, SEC_NONE),
 	SEC_DEF("lwt_out",		LWT_OUT, 0, SEC_NONE),
diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c
index 0b5398786bf3..a9ead2d55264 100644
--- a/tools/lib/bpf/libbpf_probes.c
+++ b/tools/lib/bpf/libbpf_probes.c
@@ -97,6 +97,7 @@ static int probe_prog_load(enum bpf_prog_type prog_type,
 	case BPF_PROG_TYPE_SK_REUSEPORT:
 	case BPF_PROG_TYPE_FLOW_DISSECTOR:
 	case BPF_PROG_TYPE_CGROUP_SYSCTL:
+	case BPF_PROG_TYPE_DEQUEUE:
 		break;
 	default:
 		return -EOPNOTSUPP;
@@ -244,6 +245,10 @@ static int probe_map_create(enum bpf_map_type map_type)
 		key_size = 0;
 		max_entries = 1;
 		break;
+	case BPF_MAP_TYPE_PIFO_GENERIC:
+	case BPF_MAP_TYPE_PIFO_XDP:
+		opts.map_extra = 8;
+		break;
 	case BPF_MAP_TYPE_HASH:
 	case BPF_MAP_TYPE_ARRAY:
 	case BPF_MAP_TYPE_PROG_ARRAY:
-- 
2.37.0