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// Copyright 2018 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 <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <string>
#include "gtest/gtest.h"
#include "test/util/file_descriptor.h"
#include "test/util/temp_path.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
namespace {
TEST(SyncFileRangeTest, TempFileSucceeds) {
auto tmpfile = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
auto f = ASSERT_NO_ERRNO_AND_VALUE(Open(tmpfile.path(), O_RDWR));
constexpr char data[] = "some data to sync";
int fd = f.get();
EXPECT_THAT(write(fd, data, sizeof(data)),
SyscallSucceedsWithValue(sizeof(data)));
EXPECT_THAT(sync_file_range(fd, 0, 0, SYNC_FILE_RANGE_WRITE),
SyscallSucceeds());
EXPECT_THAT(sync_file_range(fd, 0, 0, 0), SyscallSucceeds());
EXPECT_THAT(
sync_file_range(fd, 0, 0,
SYNC_FILE_RANGE_WRITE | SYNC_FILE_RANGE_WAIT_AFTER |
SYNC_FILE_RANGE_WAIT_BEFORE),
SyscallSucceeds());
EXPECT_THAT(sync_file_range(
fd, 0, 1, SYNC_FILE_RANGE_WRITE | SYNC_FILE_RANGE_WAIT_AFTER),
SyscallSucceeds());
EXPECT_THAT(sync_file_range(
fd, 1, 0, SYNC_FILE_RANGE_WRITE | SYNC_FILE_RANGE_WAIT_AFTER),
SyscallSucceeds());
}
TEST(SyncFileRangeTest, CannotSyncFileRangeOnUnopenedFd) {
auto tmpfile = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
auto f = ASSERT_NO_ERRNO_AND_VALUE(Open(tmpfile.path(), O_RDWR));
constexpr char data[] = "some data to sync";
int fd = f.get();
EXPECT_THAT(write(fd, data, sizeof(data)),
SyscallSucceedsWithValue(sizeof(data)));
pid_t pid = fork();
if (pid == 0) {
f.reset();
// fd is now invalid.
TEST_CHECK(sync_file_range(fd, 0, 0, SYNC_FILE_RANGE_WRITE) == -1);
TEST_PCHECK(errno == EBADF);
_exit(0);
}
ASSERT_THAT(pid, SyscallSucceeds());
int status = 0;
ASSERT_THAT(waitpid(pid, &status, 0), SyscallSucceedsWithValue(pid));
EXPECT_TRUE(WIFEXITED(status));
EXPECT_EQ(WEXITSTATUS(status), 0);
}
TEST(SyncFileRangeTest, BadArgs) {
auto tmpfile = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
auto f = ASSERT_NO_ERRNO_AND_VALUE(Open(tmpfile.path(), O_RDWR));
int fd = f.get();
EXPECT_THAT(sync_file_range(fd, -1, 0, 0), SyscallFailsWithErrno(EINVAL));
EXPECT_THAT(sync_file_range(fd, 0, -1, 0), SyscallFailsWithErrno(EINVAL));
EXPECT_THAT(sync_file_range(fd, 8912, INT64_MAX - 4096, 0),
SyscallFailsWithErrno(EINVAL));
}
TEST(SyncFileRangeTest, CannotSyncFileRangeWithWaitBefore) {
auto tmpfile = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
auto f = ASSERT_NO_ERRNO_AND_VALUE(Open(tmpfile.path(), O_RDWR));
constexpr char data[] = "some data to sync";
int fd = f.get();
EXPECT_THAT(write(fd, data, sizeof(data)),
SyscallSucceedsWithValue(sizeof(data)));
if (IsRunningOnGvisor()) {
EXPECT_THAT(sync_file_range(fd, 0, 0, SYNC_FILE_RANGE_WAIT_BEFORE),
SyscallFailsWithErrno(ENOSYS));
EXPECT_THAT(
sync_file_range(fd, 0, 0,
SYNC_FILE_RANGE_WAIT_BEFORE | SYNC_FILE_RANGE_WRITE),
SyscallFailsWithErrno(ENOSYS));
}
}
} // namespace
} // namespace testing
} // namespace gvisor
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