linux-kernel - [PATCH bpf-next 2/5] libbpf: support BPF_PROG_TYPE

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Date:   Sat, 1 Aug 2020 01:47:18 -0700
From:   Song Liu <songliubraving@...com>
To:     <linux-kernel@...r.kernel.org>, <bpf@...r.kernel.org>,
        <netdev@...r.kernel.org>
CC:     <ast@...nel.org>, <daniel@...earbox.net>, <kernel-team@...com>,
        <john.fastabend@...il.com>, <kpsingh@...omium.org>,
        <brouer@...hat.com>, <dlxu@...com>,
        Song Liu <songliubraving@...com>
Subject: [PATCH bpf-next 2/5] libbpf: support BPF_PROG_TYPE_USER programs

Add cpu_plus to bpf_prog_test_run_attr. Add BPF_PROG_SEC "user" for
BPF_PROG_TYPE_USER programs.

Signed-off-by: Song Liu <songliubraving@...com>
---
 tools/lib/bpf/bpf.c           | 1 +
 tools/lib/bpf/bpf.h           | 3 +++
 tools/lib/bpf/libbpf.c        | 1 +
 tools/lib/bpf/libbpf_probes.c | 1 +
 4 files changed, 6 insertions(+)

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index e1bdf214f75fe..b28c3daa9c270 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -693,6 +693,7 @@ int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr)
 	attr.test.ctx_size_in = test_attr->ctx_size_in;
 	attr.test.ctx_size_out = test_attr->ctx_size_out;
 	attr.test.repeat = test_attr->repeat;
+	attr.test.cpu_plus = test_attr->cpu_plus;
 
 	ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, sizeof(attr));
 	test_attr->data_size_out = attr.test.data_size_out;
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 6d367e01d05e9..0c799740df566 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -205,6 +205,9 @@ struct bpf_prog_test_run_attr {
 	void *ctx_out;      /* optional */
 	__u32 ctx_size_out; /* in: max length of ctx_out
 			     * out: length of cxt_out */
+	__u32 cpu_plus;	    /* specify which cpu to run the test with
+			     * cpu_plus = cpu_id + 1.
+			     * If cpu_plus = 0, run on current cpu */
 };
 
 LIBBPF_API int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr);
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index b9f11f854985b..9ce175a486214 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -6922,6 +6922,7 @@ static const struct bpf_sec_def section_defs[] = {
 	BPF_PROG_SEC("lwt_out",			BPF_PROG_TYPE_LWT_OUT),
 	BPF_PROG_SEC("lwt_xmit",		BPF_PROG_TYPE_LWT_XMIT),
 	BPF_PROG_SEC("lwt_seg6local",		BPF_PROG_TYPE_LWT_SEG6LOCAL),
+	BPF_PROG_SEC("user",			BPF_PROG_TYPE_USER),
 	BPF_APROG_SEC("cgroup_skb/ingress",	BPF_PROG_TYPE_CGROUP_SKB,
 						BPF_CGROUP_INET_INGRESS),
 	BPF_APROG_SEC("cgroup_skb/egress",	BPF_PROG_TYPE_CGROUP_SKB,
diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c
index 5a3d3f0784081..163013084000e 100644
--- a/tools/lib/bpf/libbpf_probes.c
+++ b/tools/lib/bpf/libbpf_probes.c
@@ -112,6 +112,7 @@ probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns,
 	case BPF_PROG_TYPE_STRUCT_OPS:
 	case BPF_PROG_TYPE_EXT:
 	case BPF_PROG_TYPE_LSM:
+	case BPF_PROG_TYPE_USER:
 	default:
 		break;
 	}
-- 
2.24.1