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@huawei.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220302111404.193900-5-roberto.sassu@huawei.com

diff --git a/tools/testing/selftests/bpf/progs/ima.c b/tools/testing/selftests/bpf/progs/ima.c
index 96060ff..b5a0de5 100644 (file)
--- 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);
+}