linux-kernel - [PATCH v10 1/9] bpf: Allow kfuncs to be used in LSM programs

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Message-ID: <20220810165932.2143413-2-roberto.sassu@huawei.com>
Date:   Wed, 10 Aug 2022 18:59:24 +0200
From:   Roberto Sassu <roberto.sassu@...wei.com>
To:     <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>,
        <martin.lau@...ux.dev>, <song@...nel.org>, <yhs@...com>,
        <john.fastabend@...il.com>, <kpsingh@...nel.org>, <sdf@...gle.com>,
        <haoluo@...gle.com>, <jolsa@...nel.org>, <corbet@....net>,
        <dhowells@...hat.com>, <jarkko@...nel.org>, <rostedt@...dmis.org>,
        <mingo@...hat.com>, <paul@...l-moore.com>, <jmorris@...ei.org>,
        <serge@...lyn.com>, <shuah@...nel.org>
CC:     <bpf@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <keyrings@...r.kernel.org>,
        <linux-security-module@...r.kernel.org>,
        <linux-kselftest@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Roberto Sassu <roberto.sassu@...wei.com>
Subject: [PATCH v10 1/9] bpf: Allow kfuncs to be used in LSM programs

From: KP Singh <kpsingh@...nel.org>

In preparation for the addition of new kfuncs, allow kfuncs defined in the
tracing subsystem to be used in LSM programs by mapping the LSM program
type to the TRACING hook.

Signed-off-by: KP Singh <kpsingh@...nel.org>
Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
---
 kernel/bpf/btf.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index 903719b89238..e49b3b6d48ad 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -7243,6 +7243,7 @@ static int bpf_prog_type_to_kfunc_hook(enum bpf_prog_type prog_type)
 	case BPF_PROG_TYPE_STRUCT_OPS:
 		return BTF_KFUNC_HOOK_STRUCT_OPS;
 	case BPF_PROG_TYPE_TRACING:
+	case BPF_PROG_TYPE_LSM:
 		return BTF_KFUNC_HOOK_TRACING;
 	case BPF_PROG_TYPE_SYSCALL:
 		return BTF_KFUNC_HOOK_SYSCALL;
-- 
2.25.1