// 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/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, InvalidOffset) { 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) { 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