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// Copyright 2020 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 <errno.h>
#include <fcntl.h>
#include <sys/mount.h>
#include "gtest/gtest.h"
#include "test/util/mount_util.h"
#include "test/util/temp_path.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
namespace {
TEST(FuseMount, Success) {
const FileDescriptor fd =
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/fuse", O_WRONLY));
std::string mopts = absl::StrCat("fd=", std::to_string(fd.get()));
const auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
const auto mount =
ASSERT_NO_ERRNO_AND_VALUE(Mount("", dir.path(), "fuse", 0, mopts, 0));
}
TEST(FuseMount, FDNotParsable) {
int devfd;
EXPECT_THAT(devfd = open("/dev/fuse", O_RDWR), SyscallSucceeds());
std::string mount_opts = "fd=thiscantbeparsed";
TempPath mount_dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
EXPECT_THAT(mount("fuse", mount_dir.path().c_str(), "fuse",
MS_NODEV | MS_NOSUID, mount_opts.c_str()),
SyscallFailsWithErrno(EINVAL));
}
TEST(FuseMount, NoDevice) {
const auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
EXPECT_THAT(mount("", dir.path().c_str(), "fuse", 0, ""),
SyscallFailsWithErrno(EINVAL));
}
TEST(FuseMount, ClosedFD) {
FileDescriptor f = ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/fuse", O_WRONLY));
int fd = f.release();
close(fd);
std::string mopts = absl::StrCat("fd=", std::to_string(fd));
const auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
EXPECT_THAT(mount("", dir.path().c_str(), "fuse", 0, mopts.c_str()),
SyscallFailsWithErrno(EINVAL));
}
TEST(FuseMount, BadFD) {
const auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
auto file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
const FileDescriptor fd =
ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_RDWR));
std::string mopts = absl::StrCat("fd=", std::to_string(fd.get()));
EXPECT_THAT(mount("", dir.path().c_str(), "fuse", 0, mopts.c_str()),
SyscallFailsWithErrno(EINVAL));
}
} // namespace
} // namespace testing
} // namespace gvisor
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