diff options
Diffstat (limited to 'test/syscalls/linux/sendfile.cc')
| -rw-r--r-- | test/syscalls/linux/sendfile.cc | 729 |
1 files changed, 0 insertions, 729 deletions
diff --git a/test/syscalls/linux/sendfile.cc b/test/syscalls/linux/sendfile.cc deleted file mode 100644 index 93b3a94f1..000000000 --- a/test/syscalls/linux/sendfile.cc +++ /dev/null @@ -1,729 +0,0 @@ -// 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 <linux/unistd.h> -#include <sys/eventfd.h> -#include <sys/sendfile.h> -#include <unistd.h> - -#include "gmock/gmock.h" -#include "gtest/gtest.h" -#include "absl/strings/string_view.h" -#include "absl/time/clock.h" -#include "absl/time/time.h" -#include "test/util/eventfd_util.h" -#include "test/util/file_descriptor.h" -#include "test/util/signal_util.h" -#include "test/util/temp_path.h" -#include "test/util/test_util.h" -#include "test/util/thread_util.h" -#include "test/util/timer_util.h" - -namespace gvisor { -namespace testing { - -namespace { - -TEST(SendFileTest, SendZeroBytes) { - // Create temp files. - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - - // Open the input file as read only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Open the output file as write only. - const FileDescriptor outf = - ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY)); - - // Send data and verify that sendfile returns the correct value. - EXPECT_THAT(sendfile(outf.get(), inf.get(), nullptr, 0), - SyscallSucceedsWithValue(0)); -} - -TEST(SendFileTest, InvalidOffset) { - // Create temp files. - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - - // Open the input file as read only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Open the output file as write only. - const FileDescriptor outf = - ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY)); - - // Send data and verify that sendfile returns the correct value. - off_t offset = -1; - EXPECT_THAT(sendfile(outf.get(), inf.get(), &offset, 0), - SyscallFailsWithErrno(EINVAL)); -} - -int memfd_create(const std::string& name, unsigned int flags) { - return syscall(__NR_memfd_create, name.c_str(), flags); -} - -TEST(SendFileTest, Overflow) { - // Create input file. - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Open the output file. - int fd; - EXPECT_THAT(fd = memfd_create("overflow", 0), SyscallSucceeds()); - const FileDescriptor outf(fd); - - // out_offset + kSize overflows INT64_MAX. - loff_t out_offset = 0x7ffffffffffffffeull; - constexpr int kSize = 3; - EXPECT_THAT(sendfile(outf.get(), inf.get(), &out_offset, kSize), - SyscallFailsWithErrno(EINVAL)); -} - -TEST(SendFileTest, SendTrivially) { - // Create temp files. - constexpr char kData[] = "To be, or not to be, that is the question:"; - constexpr int kDataSize = sizeof(kData) - 1; - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - - // Open the input file as read only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Open the output file as write only. - FileDescriptor outf; - outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY)); - - // Send data and verify that sendfile returns the correct value. - int bytes_sent; - EXPECT_THAT(bytes_sent = sendfile(outf.get(), inf.get(), nullptr, kDataSize), - SyscallSucceedsWithValue(kDataSize)); - - // Close outf to avoid leak. - outf.reset(); - - // Open the output file as read only. - outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY)); - - // Verify that the output file has the correct data. - char actual[kDataSize]; - ASSERT_THAT(read(outf.get(), &actual, bytes_sent), - SyscallSucceedsWithValue(kDataSize)); - EXPECT_EQ(kData, absl::string_view(actual, bytes_sent)); -} - -TEST(SendFileTest, SendTriviallyWithBothFilesReadWrite) { - // Create temp files. - constexpr char kData[] = "Whether 'tis nobler in the mind to suffer"; - constexpr int kDataSize = sizeof(kData) - 1; - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - - // Open the input file as readwrite. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR)); - - // Open the output file as readwrite. - FileDescriptor outf; - outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDWR)); - - // Send data and verify that sendfile returns the correct value. - int bytes_sent; - EXPECT_THAT(bytes_sent = sendfile(outf.get(), inf.get(), nullptr, kDataSize), - SyscallSucceedsWithValue(kDataSize)); - - // Close outf to avoid leak. - outf.reset(); - - // Open the output file as read only. - outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY)); - - // Verify that the output file has the correct data. - char actual[kDataSize]; - ASSERT_THAT(read(outf.get(), &actual, bytes_sent), - SyscallSucceedsWithValue(kDataSize)); - EXPECT_EQ(kData, absl::string_view(actual, bytes_sent)); -} - -TEST(SendFileTest, SendAndUpdateFileOffset) { - // Create temp files. - // Test input string length must be > 2 AND even. - constexpr char kData[] = "The slings and arrows of outrageous fortune,"; - constexpr int kDataSize = sizeof(kData) - 1; - constexpr int kHalfDataSize = kDataSize / 2; - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - - // Open the input file as read only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Open the output file as write only. - FileDescriptor outf; - outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY)); - - // Send data and verify that sendfile returns the correct value. - int bytes_sent; - EXPECT_THAT( - bytes_sent = sendfile(outf.get(), inf.get(), nullptr, kHalfDataSize), - SyscallSucceedsWithValue(kHalfDataSize)); - - // Close outf to avoid leak. - outf.reset(); - - // Open the output file as read only. - outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY)); - - // Verify that the output file has the correct data. - char actual[kHalfDataSize]; - ASSERT_THAT(read(outf.get(), &actual, bytes_sent), - SyscallSucceedsWithValue(kHalfDataSize)); - EXPECT_EQ(absl::string_view(kData, kHalfDataSize), - absl::string_view(actual, bytes_sent)); - - // Verify that the input file offset has been updated. - ASSERT_THAT(read(inf.get(), &actual, kDataSize - bytes_sent), - SyscallSucceedsWithValue(kHalfDataSize)); - EXPECT_EQ( - absl::string_view(kData + kDataSize - bytes_sent, kDataSize - bytes_sent), - absl::string_view(actual, kHalfDataSize)); -} - -TEST(SendFileTest, SendToDevZeroAndUpdateFileOffset) { - // Create temp files. - // Test input string length must be > 2 AND even. - constexpr char kData[] = "The slings and arrows of outrageous fortune,"; - constexpr int kDataSize = sizeof(kData) - 1; - constexpr int kHalfDataSize = kDataSize / 2; - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - - // Open the input file as read only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Open /dev/zero as write only. - const FileDescriptor outf = - ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/zero", O_WRONLY)); - - // Send data and verify that sendfile returns the correct value. - int bytes_sent; - EXPECT_THAT( - bytes_sent = sendfile(outf.get(), inf.get(), nullptr, kHalfDataSize), - SyscallSucceedsWithValue(kHalfDataSize)); - - char actual[kHalfDataSize]; - // Verify that the input file offset has been updated. - ASSERT_THAT(read(inf.get(), &actual, kDataSize - bytes_sent), - SyscallSucceedsWithValue(kHalfDataSize)); - EXPECT_EQ( - absl::string_view(kData + kDataSize - bytes_sent, kDataSize - bytes_sent), - absl::string_view(actual, kHalfDataSize)); -} - -TEST(SendFileTest, SendAndUpdateFileOffsetFromNonzeroStartingPoint) { - // Create temp files. - // Test input string length must be > 2 AND divisible by 4. - constexpr char kData[] = "The slings and arrows of outrageous fortune,"; - constexpr int kDataSize = sizeof(kData) - 1; - constexpr int kHalfDataSize = kDataSize / 2; - constexpr int kQuarterDataSize = kHalfDataSize / 2; - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - - // Open the input file as read only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Open the output file as write only. - FileDescriptor outf; - outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY)); - - // Read a quarter of the data from the infile which should update the file - // offset, we don't actually care about the data so it goes into the garbage. - char garbage[kQuarterDataSize]; - ASSERT_THAT(read(inf.get(), &garbage, kQuarterDataSize), - SyscallSucceedsWithValue(kQuarterDataSize)); - - // Send data and verify that sendfile returns the correct value. - int bytes_sent; - EXPECT_THAT( - bytes_sent = sendfile(outf.get(), inf.get(), nullptr, kHalfDataSize), - SyscallSucceedsWithValue(kHalfDataSize)); - - // Close out_fd to avoid leak. - outf.reset(); - - // Open the output file as read only. - outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY)); - - // Verify that the output file has the correct data. - char actual[kHalfDataSize]; - ASSERT_THAT(read(outf.get(), &actual, bytes_sent), - SyscallSucceedsWithValue(kHalfDataSize)); - EXPECT_EQ(absl::string_view(kData + kQuarterDataSize, kHalfDataSize), - absl::string_view(actual, bytes_sent)); - - // Verify that the input file offset has been updated. - ASSERT_THAT(read(inf.get(), &actual, kQuarterDataSize), - SyscallSucceedsWithValue(kQuarterDataSize)); - - EXPECT_EQ( - absl::string_view(kData + kDataSize - kQuarterDataSize, kQuarterDataSize), - absl::string_view(actual, kQuarterDataSize)); -} - -TEST(SendFileTest, SendAndUpdateGivenOffset) { - // Create temp files. - // Test input string length must be >= 4 AND divisible by 4. - constexpr char kData[] = "Or to take Arms against a Sea of troubles,"; - constexpr int kDataSize = sizeof(kData) + 1; - constexpr int kHalfDataSize = kDataSize / 2; - constexpr int kQuarterDataSize = kHalfDataSize / 2; - constexpr int kThreeFourthsDataSize = 3 * kDataSize / 4; - - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - - // Open the input file as read only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Open the output file as write only. - FileDescriptor outf; - outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY)); - - // Create offset for sending. - off_t offset = kQuarterDataSize; - - // Send data and verify that sendfile returns the correct value. - int bytes_sent; - EXPECT_THAT( - bytes_sent = sendfile(outf.get(), inf.get(), &offset, kHalfDataSize), - SyscallSucceedsWithValue(kHalfDataSize)); - - // Close out_fd to avoid leak. - outf.reset(); - - // Open the output file as read only. - outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY)); - - // Verify that the output file has the correct data. - char actual[kHalfDataSize]; - ASSERT_THAT(read(outf.get(), &actual, bytes_sent), - SyscallSucceedsWithValue(kHalfDataSize)); - EXPECT_EQ(absl::string_view(kData + kQuarterDataSize, kHalfDataSize), - absl::string_view(actual, bytes_sent)); - - // Verify that the input file offset has NOT been updated. - ASSERT_THAT(read(inf.get(), &actual, kHalfDataSize), - SyscallSucceedsWithValue(kHalfDataSize)); - EXPECT_EQ(absl::string_view(kData, kHalfDataSize), - absl::string_view(actual, kHalfDataSize)); - - // Verify that the offset pointer has been updated. - EXPECT_EQ(offset, kThreeFourthsDataSize); -} - -TEST(SendFileTest, DoNotSendfileIfOutfileIsAppendOnly) { - // Create temp files. - constexpr char kData[] = "And by opposing end them: to die, to sleep"; - constexpr int kDataSize = sizeof(kData) - 1; - - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - - // Open the input file as read only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Open the output file as append only. - const FileDescriptor outf = - ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY | O_APPEND)); - - // Send data and verify that sendfile returns the correct errno. - EXPECT_THAT(sendfile(outf.get(), inf.get(), nullptr, kDataSize), - SyscallFailsWithErrno(EINVAL)); -} - -TEST(SendFileTest, AppendCheckOrdering) { - constexpr char kData[] = "And by opposing end them: to die, to sleep"; - constexpr int kDataSize = sizeof(kData) - 1; - const TempPath file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - - const FileDescriptor read = - ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_RDONLY)); - const FileDescriptor write = - ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_WRONLY)); - const FileDescriptor append = - ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_APPEND)); - - // Check that read/write file mode is verified before append. - EXPECT_THAT(sendfile(append.get(), read.get(), nullptr, kDataSize), - SyscallFailsWithErrno(EBADF)); - EXPECT_THAT(sendfile(write.get(), write.get(), nullptr, kDataSize), - SyscallFailsWithErrno(EBADF)); -} - -TEST(SendFileTest, DoNotSendfileIfOutfileIsNotWritable) { - // Create temp files. - constexpr char kData[] = "No more; and by a sleep, to say we end"; - constexpr int kDataSize = sizeof(kData) - 1; - - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - - // Open the input file as read only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Open the output file as read only. - const FileDescriptor outf = - ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY)); - - // Send data and verify that sendfile returns the correct errno. - EXPECT_THAT(sendfile(outf.get(), inf.get(), nullptr, kDataSize), - SyscallFailsWithErrno(EBADF)); -} - -TEST(SendFileTest, DoNotSendfileIfInfileIsNotReadable) { - // Create temp files. - constexpr char kData[] = "the heart-ache, and the thousand natural shocks"; - constexpr int kDataSize = sizeof(kData) - 1; - - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - - // Open the input file as write only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_WRONLY)); - - // Open the output file as write only. - const FileDescriptor outf = - ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY)); - - // Send data and verify that sendfile returns the correct errno. - EXPECT_THAT(sendfile(outf.get(), inf.get(), nullptr, kDataSize), - SyscallFailsWithErrno(EBADF)); -} - -TEST(SendFileTest, DoNotSendANegativeNumberOfBytes) { - // Create temp files. - constexpr char kData[] = "that Flesh is heir to? 'Tis a consummation"; - - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - - // Open the input file as read only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Open the output file as write only. - const FileDescriptor outf = - ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY)); - - // Send data and verify that sendfile returns the correct errno. - EXPECT_THAT(sendfile(outf.get(), inf.get(), nullptr, -1), - SyscallFailsWithErrno(EINVAL)); -} - -TEST(SendFileTest, SendTheCorrectNumberOfBytesEvenIfWeTryToSendTooManyBytes) { - // Create temp files. - constexpr char kData[] = "devoutly to be wished. To die, to sleep,"; - constexpr int kDataSize = sizeof(kData) - 1; - - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - - // Open the input file as read only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Open the output file as write only. - FileDescriptor outf; - outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY)); - - // Send data and verify that sendfile returns the correct value. - int bytes_sent; - EXPECT_THAT( - bytes_sent = sendfile(outf.get(), inf.get(), nullptr, kDataSize + 100), - SyscallSucceedsWithValue(kDataSize)); - - // Close outf to avoid leak. - outf.reset(); - - // Open the output file as read only. - outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY)); - - // Verify that the output file has the correct data. - char actual[kDataSize]; - ASSERT_THAT(read(outf.get(), &actual, bytes_sent), - SyscallSucceedsWithValue(kDataSize)); - EXPECT_EQ(kData, absl::string_view(actual, bytes_sent)); -} - -TEST(SendFileTest, SendToNotARegularFile) { - // Make temp input directory and open as read only. - const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(dir.path(), O_RDONLY)); - - // Make temp output file and open as write only. - const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - const FileDescriptor outf = - ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY)); - - // Receive an error since a directory is not a regular file. - EXPECT_THAT(sendfile(outf.get(), inf.get(), nullptr, 0), - SyscallFailsWithErrno(EINVAL)); -} - -TEST(SendFileTest, SendPipeWouldBlock) { - // Create temp file. - constexpr char kData[] = - "The fool doth think he is wise, but the wise man knows himself to be a " - "fool."; - constexpr int kDataSize = sizeof(kData) - 1; - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - - // Open the input file as read only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Setup the output named pipe. - int fds[2]; - ASSERT_THAT(pipe2(fds, O_NONBLOCK), SyscallSucceeds()); - const FileDescriptor rfd(fds[0]); - const FileDescriptor wfd(fds[1]); - - // Fill up the pipe's buffer. - int pipe_size = -1; - ASSERT_THAT(pipe_size = fcntl(wfd.get(), F_GETPIPE_SZ), SyscallSucceeds()); - std::vector<char> buf(2 * pipe_size); - ASSERT_THAT(write(wfd.get(), buf.data(), buf.size()), - SyscallSucceedsWithValue(pipe_size)); - - EXPECT_THAT(sendfile(wfd.get(), inf.get(), nullptr, kDataSize), - SyscallFailsWithErrno(EWOULDBLOCK)); -} - -TEST(SendFileTest, SendPipeEOF) { - // Create and open an empty input file. - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Setup the output named pipe. - int fds[2]; - ASSERT_THAT(pipe2(fds, O_NONBLOCK), SyscallSucceeds()); - const FileDescriptor rfd(fds[0]); - const FileDescriptor wfd(fds[1]); - - EXPECT_THAT(sendfile(wfd.get(), inf.get(), nullptr, 123), - SyscallSucceedsWithValue(0)); -} - -TEST(SendFileTest, SendToFullPipeReturnsEAGAIN) { - // Create and open an empty input file. - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - const FileDescriptor in_fd = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR)); - - // Set up the output pipe. - int fds[2]; - ASSERT_THAT(pipe2(fds, O_NONBLOCK), SyscallSucceeds()); - const FileDescriptor rfd(fds[0]); - const FileDescriptor wfd(fds[1]); - - int pipe_size = -1; - ASSERT_THAT(pipe_size = fcntl(wfd.get(), F_GETPIPE_SZ), SyscallSucceeds()); - int data_size = pipe_size * 8; - ASSERT_THAT(ftruncate(in_fd.get(), data_size), SyscallSucceeds()); - - ASSERT_THAT(sendfile(wfd.get(), in_fd.get(), 0, data_size), - SyscallSucceeds()); - EXPECT_THAT(sendfile(wfd.get(), in_fd.get(), 0, data_size), - SyscallFailsWithErrno(EAGAIN)); -} - -TEST(SendFileTest, SendPipeBlocks) { - // Create temp file. - constexpr char kData[] = - "The fault, dear Brutus, is not in our stars, but in ourselves."; - constexpr int kDataSize = sizeof(kData) - 1; - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - - // Open the input file as read only. - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Setup the output named pipe. - int fds[2]; - ASSERT_THAT(pipe(fds), SyscallSucceeds()); - const FileDescriptor rfd(fds[0]); - const FileDescriptor wfd(fds[1]); - - // Fill up the pipe's buffer. - int pipe_size = -1; - ASSERT_THAT(pipe_size = fcntl(wfd.get(), F_GETPIPE_SZ), SyscallSucceeds()); - std::vector<char> buf(pipe_size); - ASSERT_THAT(write(wfd.get(), buf.data(), buf.size()), - SyscallSucceedsWithValue(pipe_size)); - - ScopedThread t([&]() { - absl::SleepFor(absl::Milliseconds(100)); - ASSERT_THAT(read(rfd.get(), buf.data(), buf.size()), - SyscallSucceedsWithValue(pipe_size)); - }); - - EXPECT_THAT(sendfile(wfd.get(), inf.get(), nullptr, kDataSize), - SyscallSucceedsWithValue(kDataSize)); -} - -TEST(SendFileTest, SendToSpecialFile) { - // Create temp file. - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), "", TempPath::kDefaultFileMode)); - - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR)); - constexpr int kSize = 0x7ff; - ASSERT_THAT(ftruncate(inf.get(), kSize), SyscallSucceeds()); - - auto eventfd = ASSERT_NO_ERRNO_AND_VALUE(NewEventFD()); - - // eventfd can accept a number of bytes which is a multiple of 8. - EXPECT_THAT(sendfile(eventfd.get(), inf.get(), nullptr, 0xfffff), - SyscallSucceedsWithValue(kSize & (~7))); -} - -TEST(SendFileTest, SendFileToPipe) { - // Create temp file. - constexpr char kData[] = "<insert-quote-here>"; - constexpr int kDataSize = sizeof(kData) - 1; - const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode)); - const FileDescriptor inf = - ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY)); - - // Create a pipe for sending to a pipe. - int fds[2]; - ASSERT_THAT(pipe(fds), SyscallSucceeds()); - const FileDescriptor rfd(fds[0]); - const FileDescriptor wfd(fds[1]); - - // Expect to read up to the given size. - std::vector<char> buf(kDataSize); - ScopedThread t([&]() { - absl::SleepFor(absl::Milliseconds(100)); - ASSERT_THAT(read(rfd.get(), buf.data(), buf.size()), - SyscallSucceedsWithValue(kDataSize)); - }); - - // Send with twice the size of the file, which should hit EOF. - EXPECT_THAT(sendfile(wfd.get(), inf.get(), nullptr, kDataSize * 2), - SyscallSucceedsWithValue(kDataSize)); -} - -TEST(SendFileTest, SendFileToSelf_NoRandomSave) { - int rawfd; - ASSERT_THAT(rawfd = memfd_create("memfd", 0), SyscallSucceeds()); - const FileDescriptor fd(rawfd); - - char c = 0x01; - ASSERT_THAT(WriteFd(fd.get(), &c, 1), SyscallSucceedsWithValue(1)); - - // Arbitrarily chosen to make sendfile() take long enough that the sentry - // watchdog usually fires unless it's reset by sendfile() between iterations - // of the buffered copy. See b/172076632. - constexpr size_t kSendfileSize = 0xa00000; - - off_t offset = 0; - ASSERT_THAT(sendfile(fd.get(), fd.get(), &offset, kSendfileSize), - SyscallSucceedsWithValue(kSendfileSize)); -} - -static volatile int signaled = 0; -void SigUsr1Handler(int sig, siginfo_t* info, void* context) { signaled = 1; } - -TEST(SendFileTest, ToEventFDDoesNotSpin_NoRandomSave) { - FileDescriptor efd = ASSERT_NO_ERRNO_AND_VALUE(NewEventFD(0, 0)); - - // Write the maximum value of an eventfd to a file. - const uint64_t kMaxEventfdValue = 0xfffffffffffffffe; - const auto tempfile = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); - const auto tempfd = ASSERT_NO_ERRNO_AND_VALUE(Open(tempfile.path(), O_RDWR)); - ASSERT_THAT( - pwrite(tempfd.get(), &kMaxEventfdValue, sizeof(kMaxEventfdValue), 0), - SyscallSucceedsWithValue(sizeof(kMaxEventfdValue))); - - // Set the eventfd's value to 1. - const uint64_t kOne = 1; - ASSERT_THAT(write(efd.get(), &kOne, sizeof(kOne)), - SyscallSucceedsWithValue(sizeof(kOne))); - - // Set up signal handler. - struct sigaction sa = {}; - sa.sa_sigaction = SigUsr1Handler; - sa.sa_flags = SA_SIGINFO; - const auto cleanup_sigact = - ASSERT_NO_ERRNO_AND_VALUE(ScopedSigaction(SIGUSR1, sa)); - - // Send SIGUSR1 to this thread in 1 second. - struct sigevent sev = {}; - sev.sigev_notify = SIGEV_THREAD_ID; - sev.sigev_signo = SIGUSR1; - sev.sigev_notify_thread_id = gettid(); - auto timer = ASSERT_NO_ERRNO_AND_VALUE(TimerCreate(CLOCK_MONOTONIC, sev)); - struct itimerspec its = {}; - its.it_value = absl::ToTimespec(absl::Seconds(1)); - DisableSave ds; // Asserting an EINTR. - ASSERT_NO_ERRNO(timer.Set(0, its)); - - // Sendfile from tempfd to the eventfd. Since the eventfd is not already at - // its maximum value, the eventfd is "ready for writing"; however, since the - // eventfd's existing value plus the new value would exceed the maximum, the - // write should internally fail with EWOULDBLOCK. In this case, sendfile() - // should block instead of spinning, and eventually be interrupted by our - // timer. See b/172075629. - EXPECT_THAT( - sendfile(efd.get(), tempfd.get(), nullptr, sizeof(kMaxEventfdValue)), - SyscallFailsWithErrno(EINTR)); - - // Signal should have been handled. - EXPECT_EQ(signaled, 1); -} - -} // namespace - -} // namespace testing -} // namespace gvisor |