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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 <dirent.h>
#include <stdint.h>
#include <stdlib.h>
#include <sys/mount.h>
#include <sys/syscall.h>
#include <string>
#include <vector>
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "test/util/capability_util.h"
#include "test/util/fs_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 {
class GetDentsTest : public ::testing::Test {
protected:
void SetUp() override {
// Verity is implemented in VFS2.
SKIP_IF(IsRunningWithVFS1());
SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_SYS_ADMIN)));
// Mount a tmpfs file system, to be wrapped by a verity fs.
tmpfs_dir_ = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
ASSERT_THAT(mount("", tmpfs_dir_.path().c_str(), "tmpfs", 0, ""),
SyscallSucceeds());
// Create a new file in the tmpfs mount.
file_ = ASSERT_NO_ERRNO_AND_VALUE(
TempPath::CreateFileWith(tmpfs_dir_.path(), kContents, 0777));
filename_ = Basename(file_.path());
}
TempPath tmpfs_dir_;
TempPath file_;
std::string filename_;
};
TEST_F(GetDentsTest, GetDents) {
std::string verity_dir = ASSERT_NO_ERRNO_AND_VALUE(
MountVerity(tmpfs_dir_.path(), {EnableTarget(filename_, O_RDONLY)}));
std::vector<std::string> expect = {".", "..", filename_};
EXPECT_NO_ERRNO(DirContains(verity_dir, expect, /*exclude=*/{}));
}
TEST_F(GetDentsTest, Deleted) {
std::string verity_dir = ASSERT_NO_ERRNO_AND_VALUE(
MountVerity(tmpfs_dir_.path(), {EnableTarget(filename_, O_RDONLY)}));
EXPECT_THAT(unlink(JoinPath(tmpfs_dir_.path(), filename_).c_str()),
SyscallSucceeds());
EXPECT_THAT(DirContains(verity_dir, /*expect=*/{}, /*exclude=*/{}),
PosixErrorIs(EIO, ::testing::_));
}
TEST_F(GetDentsTest, Renamed) {
std::string verity_dir = ASSERT_NO_ERRNO_AND_VALUE(
MountVerity(tmpfs_dir_.path(), {EnableTarget(filename_, O_RDONLY)}));
std::string new_file_name = "renamed-" + filename_;
EXPECT_THAT(rename(JoinPath(tmpfs_dir_.path(), filename_).c_str(),
JoinPath(tmpfs_dir_.path(), new_file_name).c_str()),
SyscallSucceeds());
EXPECT_THAT(DirContains(verity_dir, /*expect=*/{}, /*exclude=*/{}),
PosixErrorIs(EIO, ::testing::_));
}
} // namespace
} // namespace testing
} // namespace gvisor
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