netdev - [RFC PATCH v7 6/8] tools/libbpf: Add support for BPF_PROG_TYPE

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Message-Id: <813b2de18b94389f4df53f21b8a328e1c2fdda13.1705432850.git.amery.hung@bytedance.com>
Date: Wed, 17 Jan 2024 21:56:22 +0000
From: Amery Hung <ameryhung@...il.com>
To: netdev@...r.kernel.org
Cc: bpf@...r.kernel.org,
	yangpeihao@...u.edu.cn,
	toke@...hat.com,
	jhs@...atatu.com,
	jiri@...nulli.us,
	sdf@...gle.com,
	xiyou.wangcong@...il.com,
	yepeilin.cs@...il.com
Subject: [RFC PATCH v7 6/8] tools/libbpf: Add support for BPF_PROG_TYPE_QDISC

While eBPF qdisc uses NETLINK for attachment, expected_attach_type is
required at load time to verify context access from different programs.
This patch adds the section definition for this.

Signed-off-by: Amery Hung <amery.hung@...edance.com>
---
 tools/lib/bpf/libbpf.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e067be95da3c..0541f85b4ce6 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -8991,6 +8991,10 @@ static const struct bpf_sec_def section_defs[] = {
 	SEC_DEF("struct_ops.s+",	STRUCT_OPS, 0, SEC_SLEEPABLE),
 	SEC_DEF("sk_lookup",		SK_LOOKUP, BPF_SK_LOOKUP, SEC_ATTACHABLE),
 	SEC_DEF("netfilter",		NETFILTER, BPF_NETFILTER, SEC_NONE),
+	SEC_DEF("qdisc/enqueue",	QDISC, BPF_QDISC_ENQUEUE, SEC_ATTACHABLE_OPT),
+	SEC_DEF("qdisc/dequeue",	QDISC, BPF_QDISC_DEQUEUE, SEC_ATTACHABLE_OPT),
+	SEC_DEF("qdisc/reset",		QDISC, BPF_QDISC_RESET, SEC_ATTACHABLE_OPT),
+	SEC_DEF("qdisc/init",		QDISC, BPF_QDISC_INIT, SEC_ATTACHABLE_OPT),
 };
 
 int libbpf_register_prog_handler(const char *sec,
-- 
2.20.1