1 files changed, 57 insertions, 0 deletions
diff --git a/test/syscalls/linux/fallocate.cc b/test/syscalls/linux/fallocate.cc
new file mode 100644
index 000000000..53aedd4e4
--- /dev/null
+++ b/test/syscalls/linux/fallocate.cc
@@ -0,0 +1,57 @@
+// 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 <sys/eventfd.h>
+#include <unistd.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 {
+
+// These tests are very rudimentary because fallocate is not
+// implemented.  We just want to make sure the expected error codes are
+// returned.
+
+TEST(FallocateTest, NotImplemented) {
+  auto temp_path = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
+  FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(temp_path.path(), O_RDWR));
+
+  // Test that a completely unassigned fallocate mode returns EOPNOTSUPP.
+  ASSERT_THAT(fallocate(fd.get(), 0x80, 0, 32768),
+              SyscallFailsWithErrno(EOPNOTSUPP));
+}
+
+TEST(FallocateTest, BadOffset) {
+  auto temp_path = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
+  FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(temp_path.path(), O_RDWR));
+  ASSERT_THAT(fallocate(fd.get(), 0, -1, 32768), SyscallFailsWithErrno(EINVAL));
+}
+
+TEST(FallocateTest, BadLength) {
+  auto temp_path = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
+  FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(temp_path.path(), O_RDWR));
+  ASSERT_THAT(fallocate(fd.get(), 0, 0, -1), SyscallFailsWithErrno(EINVAL));
+}
+
+}  // namespace
+
+}  // namespace testing
+}  // namespace gvisor