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// Copyright 2019 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 "gtest/gtest.h"
#include "test/syscalls/linux/socket_test_util.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(ReadaheadTest, InvalidFD) {
EXPECT_THAT(readahead(-1, 1, 1), SyscallFailsWithErrno(EBADF));
}
TEST(ReadaheadTest, UnsupportedFile) {
FileDescriptor sock =
ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, SOCK_STREAM, 0));
ASSERT_THAT(readahead(sock.get(), 1, 1), SyscallFailsWithErrno(EINVAL));
}
TEST(ReadaheadTest, InvalidOffset) {
// This test is not valid for some Linux Kernels.
SKIP_IF(!IsRunningOnGvisor());
const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
const FileDescriptor fd =
ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR));
EXPECT_THAT(readahead(fd.get(), -1, 1), SyscallFailsWithErrno(EINVAL));
}
TEST(ReadaheadTest, ValidOffset) {
constexpr char kData[] = "123";
const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
const FileDescriptor fd =
ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR));
// N.B. The implementation of readahead is filesystem-specific, and a file
// backed by ram may return EINVAL because there is nothing to be read.
EXPECT_THAT(readahead(fd.get(), 1, 1), AnyOf(SyscallSucceedsWithValue(0),
SyscallFailsWithErrno(EINVAL)));
}
TEST(ReadaheadTest, PastEnd) {
constexpr char kData[] = "123";
const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
const FileDescriptor fd =
ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR));
// See above.
EXPECT_THAT(readahead(fd.get(), 2, 2), AnyOf(SyscallSucceedsWithValue(0),
SyscallFailsWithErrno(EINVAL)));
}
TEST(ReadaheadTest, CrossesEnd) {
constexpr char kData[] = "123";
const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
const FileDescriptor fd =
ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR));
// See above.
EXPECT_THAT(readahead(fd.get(), 4, 2), AnyOf(SyscallSucceedsWithValue(0),
SyscallFailsWithErrno(EINVAL)));
}
TEST(ReadaheadTest, WriteOnly) {
const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
const FileDescriptor fd =
ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_WRONLY));
EXPECT_THAT(readahead(fd.get(), 0, 1), SyscallFailsWithErrno(EBADF));
}
TEST(ReadaheadTest, InvalidSize) {
// This test is not valid on some Linux kernels.
SKIP_IF(!IsRunningOnGvisor());
const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
const FileDescriptor fd =
ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR));
EXPECT_THAT(readahead(fd.get(), 0, -1), SyscallFailsWithErrno(EINVAL));
}
} // namespace
} // namespace testing
} // namespace gvisor
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