From afe364822a73b32b903775104895baab73a59f2a Mon Sep 17 00:00:00 2001
From: Aaron Jacobs <jacobsa@google.com>
Date: Fri, 27 Feb 2015 13:32:04 +1100
Subject: [PATCH] Added a getattr method.

---
 file_system.go                          | 18 ++++++++++++++++++
 fuseutil/not_implemented_file_system.go |  7 +++++++
 2 files changed, 25 insertions(+)

diff --git a/file_system.go b/file_system.go
index a6a042a..5943dd2 100644
--- a/file_system.go
+++ b/file_system.go
@@ -26,6 +26,12 @@ type FileSystem interface {
 		ctx context.Context,
 		req *LookUpInodeRequest) (*LookUpInodeResponse, error)
 
+	// Refresh the attributes for an inode whose ID was previously returned by
+	// LookUpInode.
+	GetInodeAttributes(
+		ctx context.Context,
+		req *GetInodeAttributesRequest) (*GetInodeAttributesResponse, error)
+
 	// Forget an inode ID previously issued (e.g. by LookUpInode). The kernel
 	// calls this when removing an inode from its internal caches.
 	ForgetInode(
@@ -201,6 +207,18 @@ type LookUpInodeResponse struct {
 	EntryExpiration time.Time
 }
 
+type GetInodeAttributesRequest struct {
+	// The inode of interest.
+	Inode InodeID
+}
+
+type GetInodeAttributesResponse struct {
+	// Attributes for the inode, and the time at which they should expire. See
+	// notes on LookUpInodeResponse.AttributesExpiration for more.
+	Attributes           InodeAttributes
+	AttributesExpiration time.Time
+}
+
 type ForgetInodeRequest struct {
 	// The inode to be forgotten. The kernel guarantees that the node ID will not
 	// be used in further calls to the file system (unless it is reissued by the
diff --git a/fuseutil/not_implemented_file_system.go b/fuseutil/not_implemented_file_system.go
index e341065..1fb12f4 100644
--- a/fuseutil/not_implemented_file_system.go
+++ b/fuseutil/not_implemented_file_system.go
@@ -21,6 +21,13 @@ func (fs *NotImplementedFileSystem) LookUpInode(
 	return nil, fuse.ENOSYS
 }
 
+func (fs *NotImplementedFileSystem) GetInodeAttributes(
+	ctx context.Context,
+	req *fuse.GetInodeAttributesRequest) (
+	*fuse.GetInodeAttributesResponse, error) {
+	return nil, fuse.ENOSYS
+}
+
 func (fs *NotImplementedFileSystem) ForgetInode(
 	ctx context.Context,
 	req *fuse.ForgetInodeRequest) (*fuse.ForgetInodeResponse, error) {