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// Copyright 2021 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <sys/mount.h>
#include <iomanip>
#include <sstream>
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "test/util/capability_util.h"
#include "test/util/temp_path.h"
#include "test/util/test_util.h"
#include "test/util/verity_util.h"
namespace gvisor {
namespace testing {
namespace {
// Mount verity file system on an existing tmpfs mount.
TEST(MountTest, MountExisting) {
// Verity is implemented in VFS2.
SKIP_IF(IsRunningWithVFS1());
SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_SYS_ADMIN)));
// Mount a new tmpfs file system.
auto const tmpfs_dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
ASSERT_THAT(mount("", tmpfs_dir.path().c_str(), "tmpfs", 0, ""),
SyscallSucceeds());
// Mount a verity file system on the existing gofer mount.
auto const verity_dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
std::string opts = "lower_path=" + tmpfs_dir.path();
ASSERT_THAT(mount("", verity_dir.path().c_str(), "verity", 0, opts.c_str()),
SyscallSucceeds());
auto const fd =
ASSERT_NO_ERRNO_AND_VALUE(Open(verity_dir.path(), O_RDONLY, 0777));
EXPECT_THAT(ioctl(fd.get(), FS_IOC_ENABLE_VERITY), SyscallSucceeds());
}
} // namespace
} // namespace testing
} // namespace gvisor
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