Implement FUSE_OPEN/OPENDIR

Fixes #3174

3 files changed, 64 insertions, 0 deletions

diff --git a/test/util/BUILD b/test/util/BUILD
index b0c2c2a5a..fc5fb3a8d 100644
--- a/test/util/BUILD
+++ b/test/util/BUILD
@@ -48,6 +48,7 @@ cc_library(
 cc_library(
     name = "fuse_util",
     testonly = 1,
+    srcs = ["fuse_util.cc"],
     hdrs = ["fuse_util.h"],
 )
 
diff --git a/test/util/fuse_util.cc b/test/util/fuse_util.cc
new file mode 100644
index 000000000..5b10a9e45
--- /dev/null
+++ b/test/util/fuse_util.cc
@@ -0,0 +1,59 @@
+// Copyright 2020 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 "test/util/fuse_util.h"
+
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <string>
+
+namespace gvisor {
+namespace testing {
+
+// Create response body with specified mode and nodeID.
+fuse_entry_out DefaultEntryOut(mode_t mode, uint64_t node_id) {
+  const int time_sec = 1595436289;
+  const int time_nsec = 134150844;
+  struct fuse_entry_out default_entry_out = {
+      .nodeid = node_id,
+      .generation = 0,
+      .entry_valid = time_sec,
+      .attr_valid = time_sec,
+      .entry_valid_nsec = time_nsec,
+      .attr_valid_nsec = time_nsec,
+      .attr =
+          (struct fuse_attr){
+              .ino = node_id,
+              .size = 512,
+              .blocks = 4,
+              .atime = time_sec,
+              .mtime = time_sec,
+              .ctime = time_sec,
+              .atimensec = time_nsec,
+              .mtimensec = time_nsec,
+              .ctimensec = time_nsec,
+              .mode = mode,
+              .nlink = 2,
+              .uid = 1234,
+              .gid = 4321,
+              .rdev = 12,
+              .blksize = 4096,
+          },
+  };
+  return default_entry_out;
+};
+
+}  // namespace testing
+}  // namespace gvisor
diff --git a/test/util/fuse_util.h b/test/util/fuse_util.h
index 5f5182b96..1f1bf64a4 100644
--- a/test/util/fuse_util.h
+++ b/test/util/fuse_util.h
@@ -15,6 +15,7 @@
 #ifndef GVISOR_TEST_UTIL_FUSE_UTIL_H_
 #define GVISOR_TEST_UTIL_FUSE_UTIL_H_
 
+#include <linux/fuse.h>
 #include <sys/uio.h>
 
 #include <string>
@@ -62,6 +63,9 @@ std::vector<struct iovec> FuseGenerateIovecs(T &first, Types &...args) {
   return first_iovec;
 }
 
+// Return a fuse_entry_out FUSE server response body.
+fuse_entry_out DefaultEntryOut(mode_t mode, uint64_t nodeId);
+
 }  // namespace testing
 }  // namespace gvisor
 #endif  // GVISOR_TEST_UTIL_FUSE_UTIL_H_