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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 <linux/fuse.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <sys/types.h>
#include <unistd.h>
#include <string>
#include <vector>
#include "gtest/gtest.h"
#include "test/fuse/linux/fuse_base.h"
#include "test/util/fuse_util.h"
#include "test/util/temp_umask.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
namespace {
class MknodTest : public FuseTest {
protected:
const std::string test_file_ = "test_file";
const mode_t perms_ = S_IRWXU | S_IRWXG | S_IRWXO;
};
TEST_F(MknodTest, RegularFile) {
const std::string test_file_path =
JoinPath(mount_point_.path().c_str(), test_file_);
const mode_t new_umask = 0077;
struct fuse_out_header out_header = {
.len = sizeof(struct fuse_out_header) + sizeof(struct fuse_entry_out),
};
struct fuse_entry_out out_payload = DefaultEntryOut(S_IFREG | perms_, 5);
auto iov_out = FuseGenerateIovecs(out_header, out_payload);
SetServerResponse(FUSE_MKNOD, iov_out);
TempUmask mask(new_umask);
ASSERT_THAT(mknod(test_file_path.c_str(), perms_, 0), SyscallSucceeds());
struct fuse_in_header in_header;
struct fuse_mknod_in in_payload;
std::vector<char> actual_file(test_file_.length() + 1);
auto iov_in = FuseGenerateIovecs(in_header, in_payload, actual_file);
GetServerActualRequest(iov_in);
EXPECT_EQ(in_header.len,
sizeof(in_header) + sizeof(in_payload) + test_file_.length() + 1);
EXPECT_EQ(in_header.opcode, FUSE_MKNOD);
EXPECT_EQ(in_payload.mode & 0777, perms_ & ~new_umask);
EXPECT_EQ(in_payload.umask, new_umask);
EXPECT_EQ(in_payload.rdev, 0);
EXPECT_EQ(std::string(actual_file.data()), test_file_);
}
TEST_F(MknodTest, FileTypeError) {
const std::string test_file_path =
JoinPath(mount_point_.path().c_str(), test_file_);
struct fuse_out_header out_header = {
.len = sizeof(struct fuse_out_header) + sizeof(struct fuse_entry_out),
};
// server return directory instead of regular file should cause an error.
struct fuse_entry_out out_payload = DefaultEntryOut(S_IFDIR | perms_, 5);
auto iov_out = FuseGenerateIovecs(out_header, out_payload);
SetServerResponse(FUSE_MKNOD, iov_out);
ASSERT_THAT(mknod(test_file_path.c_str(), perms_, 0),
SyscallFailsWithErrno(EIO));
SkipServerActualRequest();
}
TEST_F(MknodTest, NodeIDError) {
const std::string test_file_path =
JoinPath(mount_point_.path().c_str(), test_file_);
struct fuse_out_header out_header = {
.len = sizeof(struct fuse_out_header) + sizeof(struct fuse_entry_out),
};
struct fuse_entry_out out_payload =
DefaultEntryOut(S_IFREG | perms_, FUSE_ROOT_ID);
auto iov_out = FuseGenerateIovecs(out_header, out_payload);
SetServerResponse(FUSE_MKNOD, iov_out);
ASSERT_THAT(mknod(test_file_path.c_str(), perms_, 0),
SyscallFailsWithErrno(EIO));
SkipServerActualRequest();
}
} // namespace
} // namespace testing
} // namespace gvisor
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