92 lines
3.3 KiB
C++
92 lines
3.3 KiB
C++
// Copyright 2019 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <errno.h>
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#include <fcntl.h>
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#include "gtest/gtest.h"
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#include "test/util/file_descriptor.h"
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#include "test/util/temp_path.h"
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#include "test/util/test_util.h"
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namespace gvisor {
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namespace testing {
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namespace {
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TEST(ReadaheadTest, InvalidFD) {
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EXPECT_THAT(readahead(-1, 1, 1), SyscallFailsWithErrno(EBADF));
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}
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TEST(ReadaheadTest, InvalidOffset) {
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const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
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const FileDescriptor fd =
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ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR));
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EXPECT_THAT(readahead(fd.get(), -1, 1), SyscallFailsWithErrno(EINVAL));
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}
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TEST(ReadaheadTest, ValidOffset) {
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constexpr char kData[] = "123";
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const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
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GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
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const FileDescriptor fd =
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ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR));
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// N.B. The implementation of readahead is filesystem-specific, and a file
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// backed by ram may return EINVAL because there is nothing to be read.
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EXPECT_THAT(readahead(fd.get(), 1, 1), AnyOf(SyscallSucceedsWithValue(0),
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SyscallFailsWithErrno(EINVAL)));
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}
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TEST(ReadaheadTest, PastEnd) {
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constexpr char kData[] = "123";
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const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
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GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
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const FileDescriptor fd =
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ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR));
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// See above.
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EXPECT_THAT(readahead(fd.get(), 2, 2), AnyOf(SyscallSucceedsWithValue(0),
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SyscallFailsWithErrno(EINVAL)));
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}
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TEST(ReadaheadTest, CrossesEnd) {
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constexpr char kData[] = "123";
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const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
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GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
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const FileDescriptor fd =
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ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR));
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// See above.
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EXPECT_THAT(readahead(fd.get(), 4, 2), AnyOf(SyscallSucceedsWithValue(0),
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SyscallFailsWithErrno(EINVAL)));
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}
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TEST(ReadaheadTest, WriteOnly) {
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const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
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const FileDescriptor fd =
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ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_WRONLY));
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EXPECT_THAT(readahead(fd.get(), 0, 1), SyscallFailsWithErrno(EBADF));
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}
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TEST(ReadaheadTest, InvalidSize) {
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const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
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const FileDescriptor fd =
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ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR));
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EXPECT_THAT(readahead(fd.get(), 0, -1), SyscallFailsWithErrno(EINVAL));
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}
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} // namespace
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} // namespace testing
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} // namespace gvisor
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