From b4820e598681c61fbf0e8a7f4d3436d2599ce53c Mon Sep 17 00:00:00 2001
From: Rahat Mahmood <rahat@google.com>
Date: Fri, 28 Aug 2020 14:29:16 -0700
Subject: Implement StatFS for various VFS2 filesystems.

This mainly involved enabling kernfs' client filesystems to provide a
StatFS implementation.

Fixes #3411, #3515.

PiperOrigin-RevId: 329009864
---
 pkg/sentry/fsimpl/sockfs/sockfs.go | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'pkg/sentry/fsimpl/sockfs/sockfs.go')

diff --git a/pkg/sentry/fsimpl/sockfs/sockfs.go b/pkg/sentry/fsimpl/sockfs/sockfs.go
index c61818ff6..94a998568 100644
--- a/pkg/sentry/fsimpl/sockfs/sockfs.go
+++ b/pkg/sentry/fsimpl/sockfs/sockfs.go
@@ -81,10 +81,10 @@ func (fs *filesystem) PrependPath(ctx context.Context, vfsroot, vd vfs.VirtualDe
 
 // inode implements kernfs.Inode.
 type inode struct {
-	kernfs.InodeNotDirectory
-	kernfs.InodeNotSymlink
 	kernfs.InodeAttrs
 	kernfs.InodeNoopRefCount
+	kernfs.InodeNotDirectory
+	kernfs.InodeNotSymlink
 }
 
 // Open implements kernfs.Inode.Open.
@@ -92,6 +92,11 @@ func (i *inode) Open(ctx context.Context, rp *vfs.ResolvingPath, vfsd *vfs.Dentr
 	return nil, syserror.ENXIO
 }
 
+// StatFS implements kernfs.Inode.StatFS.
+func (i *inode) StatFS(ctx context.Context, fs *vfs.Filesystem) (linux.Statfs, error) {
+	return vfs.GenericStatFS(linux.SOCKFS_MAGIC), nil
+}
+
 // NewDentry constructs and returns a sockfs dentry.
 //
 // Preconditions: mnt.Filesystem() must have been returned by NewFilesystem().
-- 
cgit v1.2.3