netdev - [PATCH v4 bpf-next 3/4] libbpf: introduce section "iter.s/" for sleepable bpf

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Message-ID: <20210204205002.4075937-4-songliubraving@fb.com>
Date:   Thu, 4 Feb 2021 12:50:00 -0800
From:   Song Liu <songliubraving@...com>
To:     <bpf@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-mm@...ck.org>
CC:     <ast@...nel.org>, <daniel@...earbox.net>, <kernel-team@...com>,
        <akpm@...ux-foundation.org>, Song Liu <songliubraving@...com>,
        Yonghong Song <yhs@...com>, KP Singh <kpsingh@...nel.org>
Subject: [PATCH v4 bpf-next 3/4] libbpf: introduce section "iter.s/" for sleepable bpf_iter program

Sleepable iterator program have access to helper functions like bpf_d_path.

Acked-by: Yonghong Song <yhs@...com>
Acked-by: KP Singh <kpsingh@...nel.org>
Signed-off-by: Song Liu <songliubraving@...com>
---
 tools/lib/bpf/libbpf.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 2abbc38005684..903ccd7e93206 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -8555,6 +8555,11 @@ static const struct bpf_sec_def section_defs[] = {
 		.expected_attach_type = BPF_TRACE_ITER,
 		.is_attach_btf = true,
 		.attach_fn = attach_iter),
+	SEC_DEF("iter.s/", TRACING,
+		.expected_attach_type = BPF_TRACE_ITER,
+		.is_attach_btf = true,
+		.is_sleepable = true,
+		.attach_fn = attach_iter),
 	BPF_EAPROG_SEC("xdp_devmap/",		BPF_PROG_TYPE_XDP,
 						BPF_XDP_DEVMAP),
 	BPF_EAPROG_SEC("xdp_cpumap/",		BPF_PROG_TYPE_XDP,
-- 
2.24.1