1 files changed, 111 insertions, 0 deletions
diff --git a/test/syscalls/linux/sync_file_range.cc b/test/syscalls/linux/sync_file_range.cc
new file mode 100644
index 000000000..ebe4ca171
--- /dev/null
+++ b/test/syscalls/linux/sync_file_range.cc
@@ -0,0 +1,111 @@
+// Copyright 2018 Google LLC
+//
+// 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);
+  }
+
+  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