netdev - [PATCH v3 4/9] selftests/bpf: Move sample generation code to ima_test

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Date:   Wed, 2 Mar 2022 12:13:59 +0100
From:   Roberto Sassu <roberto.sassu@...wei.com>
To:     <zohar@...ux.ibm.com>, <shuah@...nel.org>, <ast@...nel.org>,
        <daniel@...earbox.net>, <andrii@...nel.org>, <yhs@...com>,
        <kpsingh@...nel.org>, <revest@...omium.org>,
        <gregkh@...uxfoundation.org>
CC:     <linux-integrity@...r.kernel.org>,
        <linux-security-module@...r.kernel.org>,
        <linux-kselftest@...r.kernel.org>, <bpf@...r.kernel.org>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Roberto Sassu <roberto.sassu@...wei.com>
Subject: [PATCH v3 4/9] selftests/bpf: Move sample generation code to ima_test_common()

Move sample generator code to ima_test_common() so that the new function
can be called by multiple LSM hooks.

Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
---
 tools/testing/selftests/bpf/progs/ima.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/bpf/progs/ima.c b/tools/testing/selftests/bpf/progs/ima.c
index 96060ff4ffc6..b5a0de50d1b4 100644
--- a/tools/testing/selftests/bpf/progs/ima.c
+++ b/tools/testing/selftests/bpf/progs/ima.c
@@ -18,8 +18,7 @@ struct {
 
 char _license[] SEC("license") = "GPL";
 
-SEC("lsm.s/bprm_committed_creds")
-void BPF_PROG(ima, struct linux_binprm *bprm)
+static void ima_test_common(struct file *file)
 {
 	u64 ima_hash = 0;
 	u64 *sample;
@@ -28,7 +27,7 @@ void BPF_PROG(ima, struct linux_binprm *bprm)
 
 	pid = bpf_get_current_pid_tgid() >> 32;
 	if (pid == monitored_pid) {
-		ret = bpf_ima_inode_hash(bprm->file->f_inode, &ima_hash,
+		ret = bpf_ima_inode_hash(file->f_inode, &ima_hash,
 					 sizeof(ima_hash));
 		if (ret < 0 || ima_hash == 0)
 			return;
@@ -43,3 +42,9 @@ void BPF_PROG(ima, struct linux_binprm *bprm)
 
 	return;
 }
+
+SEC("lsm.s/bprm_committed_creds")
+void BPF_PROG(bprm_committed_creds, struct linux_binprm *bprm)
+{
+	ima_test_common(bprm->file);
+}
-- 
2.32.0