From 7db196c4dbb33562dbfaa28a9476c590f356b2b5 Mon Sep 17 00:00:00 2001
From: Dean Deng <deandeng@google.com>
Date: Fri, 19 Jun 2020 11:48:24 -0700
Subject: Port fadvise64 to vfs2.

Like vfs1, we have a trivial implementation that ignores all valid advice.

Updates #2923.

PiperOrigin-RevId: 317349505
---
 pkg/abi/linux/BUILD      |  1 +
 pkg/abi/linux/fadvise.go | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+)
 create mode 100644 pkg/abi/linux/fadvise.go

(limited to 'pkg/abi')

diff --git a/pkg/abi/linux/BUILD b/pkg/abi/linux/BUILD
index 114b516e2..2b789c4ec 100644
--- a/pkg/abi/linux/BUILD
+++ b/pkg/abi/linux/BUILD
@@ -23,6 +23,7 @@ go_library(
         "errors.go",
         "eventfd.go",
         "exec.go",
+        "fadvise.go",
         "fcntl.go",
         "file.go",
         "file_amd64.go",
diff --git a/pkg/abi/linux/fadvise.go b/pkg/abi/linux/fadvise.go
new file mode 100644
index 000000000..b06ff9964
--- /dev/null
+++ b/pkg/abi/linux/fadvise.go
@@ -0,0 +1,24 @@
+// 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.
+
+package linux
+
+const (
+	POSIX_FADV_NORMAL     = 0
+	POSIX_FADV_RANDOM     = 1
+	POSIX_FADV_SEQUENTIAL = 2
+	POSIX_FADV_WILLNEED   = 3
+	POSIX_FADV_DONTNEED   = 4
+	POSIX_FADV_NOREUSE    = 5
+)
-- 
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