From fc1196ee65a53004e3e8b97ec5d57404552b90b8 Mon Sep 17 00:00:00 2001
From: Boyuan He <heboyuan@google.com>
Date: Tue, 18 Aug 2020 01:46:39 +0000
Subject: Implement FUSE_OPEN/OPENDIR

Fixes #3174
---
 pkg/abi/linux/fuse.go | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

(limited to 'pkg/abi')

diff --git a/pkg/abi/linux/fuse.go b/pkg/abi/linux/fuse.go
index 346a9e6fc..e09715ecd 100644
--- a/pkg/abi/linux/fuse.go
+++ b/pkg/abi/linux/fuse.go
@@ -357,3 +357,41 @@ func (r *FUSELookupIn) MarshalUnsafe(buf []byte) {
 func (r *FUSELookupIn) SizeBytes() int {
 	return len(r.Name) + 1
 }
+
+// MAX_NON_LFS indicates the maximum offset without large file support.
+const MAX_NON_LFS = ((1 << 31) - 1)
+
+// flags returned by OPEN request.
+const (
+	// FOPEN_DIRECT_IO indicates bypassing page cache for this opened file.
+	FOPEN_DIRECT_IO = 1 << 0
+	// FOPEN_KEEP_CACHE avoids invalidate of data cache on open.
+	FOPEN_KEEP_CACHE = 1 << 1
+	// FOPEN_NONSEEKABLE indicates the file cannot be seeked.
+	FOPEN_NONSEEKABLE = 1 << 2
+)
+
+// FUSEOpenIn is the request sent by the kernel to the daemon,
+// to negotiate flags and get file handle.
+//
+// +marshal
+type FUSEOpenIn struct {
+	// Flags of this open request.
+	Flags uint32
+
+	_ uint32
+}
+
+// FUSEOpenOut is the reply sent by the daemon to the kernel
+// for FUSEOpenIn.
+//
+// +marshal
+type FUSEOpenOut struct {
+	// Fh is the file handler for opened file.
+	Fh uint64
+
+	// OpenFlag for the opened file.
+	OpenFlag uint32
+
+	_ uint32
+}
-- 
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