[PATCH bpf-next] selftests/bpf: Add verbosity to ima_setup.sh

[KP Singh <kpsingh@xxxxxxxxxxxx>]

From: KP Singh <kpsingh@xxxxxxxxxx>

Currently, ima_setup.sh spews outputs from commands like mkfs and dd
on the terminal without taking into account the verbosity level of
the test framework. Add an option to specify the verbosity for the
shell script and only print output when verbosity > VERBOSE_NONE.

Since the command line parsing got complicated with the addition of
verbosity, switched "action" (-a, --action) and "directory" (-d, --dir)
to command line switches as well.

Fixes: 34b82d3ac105 ("bpf: Add a selftest for bpf_ima_inode_hash")
Reported-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
Signed-off-by: KP Singh <kpsingh@xxxxxxxxxx>
---
 tools/testing/selftests/bpf/ima_setup.sh      | 36 ++++++++++++++++---
 .../selftests/bpf/prog_tests/test_ima.c       | 11 ++++--
 2 files changed, 40 insertions(+), 7 deletions(-)

diff --git a/tools/testing/selftests/bpf/ima_setup.sh b/tools/testing/selftests/bpf/ima_setup.sh
index 2bfc646bc230..d8d063fa7781 100755
--- a/tools/testing/selftests/bpf/ima_setup.sh
+++ b/tools/testing/selftests/bpf/ima_setup.sh
@@ -10,7 +10,7 @@ TEST_BINARY="/bin/true"
 
 usage()
 {
-	echo "Usage: $0 <setup|cleanup|run> <existing_tmp_dir>"
+	echo "Usage: $0 -a <setup|cleanup|run> -d <existing_tmp_dir> -v <yes|no>"
 	exit 1
 }
 
@@ -77,12 +77,40 @@ run()
 
 main()
 {
-	[[ $# -ne 2 ]] && usage
+	local tmp_dir=""
+	local action=""
+	local verbosity="no"
+
+	while [[ $# -gt 0 ]]; do
+		case "$1" in
+		-v | --verbosity)
+			shift
+			verbosity="$1"
+			shift
+			;;
+		-a | --action)
+			shift
+			action="$1"
+			shift
+			;;
+		-d | --dir)
+			shift
+			tmp_dir="$1"
+			shift
+			;;
+		* )
+			break
+			;;
+		esac
+	done
 
-	local action="$1"
-	local tmp_dir="$2"
+	if [[ "${verbosity}" == "no" ]]; then
+		exec 1> /dev/null
+		exec 2>&1
+	fi
 
 	[[ ! -d "${tmp_dir}" ]] && echo "Directory ${tmp_dir} doesn't exist" && exit 1
+	[[ -z "${action}" ]] && usage
 
 	if [[ "${action}" == "setup" ]]; then
 		setup "${tmp_dir}"
diff --git a/tools/testing/selftests/bpf/prog_tests/test_ima.c b/tools/testing/selftests/bpf/prog_tests/test_ima.c
index 61fca681d524..debf53976997 100644
--- a/tools/testing/selftests/bpf/prog_tests/test_ima.c
+++ b/tools/testing/selftests/bpf/prog_tests/test_ima.c
@@ -12,6 +12,8 @@
 
 #include "ima.skel.h"
 
+#define HELPER_VERBOSITY() (env.verbosity == VERBOSE_NONE ? "no" : "yes")
+
 static int run_measured_process(const char *measured_dir, u32 *monitored_pid)
 {
 	int child_pid, child_status;
@@ -19,7 +21,8 @@ static int run_measured_process(const char *measured_dir, u32 *monitored_pid)
 	child_pid = fork();
 	if (child_pid == 0) {
 		*monitored_pid = getpid();
-		execlp("./ima_setup.sh", "./ima_setup.sh", "run", measured_dir,
+		execlp("./ima_setup.sh", "./ima_setup.sh", "-v",
+		       HELPER_VERBOSITY(), "-a", "run", "-d", measured_dir,
 		       NULL);
 		exit(errno);
 
@@ -52,7 +55,8 @@ void test_test_ima(void)
 	if (CHECK(measured_dir == NULL, "mkdtemp", "err %d\n", errno))
 		goto close_prog;
 
-	snprintf(cmd, sizeof(cmd), "./ima_setup.sh setup %s", measured_dir);
+	snprintf(cmd, sizeof(cmd), "./ima_setup.sh -v %s -a setup -d %s",
+		 HELPER_VERBOSITY(), measured_dir);
 	if (CHECK_FAIL(system(cmd)))
 		goto close_clean;
 
@@ -67,7 +71,8 @@ void test_test_ima(void)
 	      "ima_hash = %lu\n", skel->bss->ima_hash);
 
 close_clean:
-	snprintf(cmd, sizeof(cmd), "./ima_setup.sh cleanup %s", measured_dir);
+	snprintf(cmd, sizeof(cmd), "./ima_setup.sh -v %s -a cleanup -d %s",
+		 HELPER_VERBOSITY(), measured_dir);
 	CHECK_FAIL(system(cmd));
 close_prog:
 	ima__destroy(skel);
-- 
2.29.2.576.ga3fc446d84-goog