From c97f0978b7ced0a31891fab639cc6c9a80e7fb37 Mon Sep 17 00:00:00 2001
From: Nicolas Lacasse <nlacasse@google.com>
Date: Wed, 9 May 2018 16:57:31 -0700
Subject: [PATCH] Cache symlinks in addition to files and directories.

PiperOrigin-RevId: 196051326
Change-Id: I4195b110e9a7d38d1ce1ed9c613971dea1be3bf0
---
 pkg/sentry/fs/gofer/session.go | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/pkg/sentry/fs/gofer/session.go b/pkg/sentry/fs/gofer/session.go
index ab3b964e0..1076e3e55 100644
--- a/pkg/sentry/fs/gofer/session.go
+++ b/pkg/sentry/fs/gofer/session.go
@@ -126,9 +126,12 @@ func (s *session) Revalidate(*fs.Dirent) bool {
 
 // TakeRefs takes an extra reference on dirent if possible.
 func (s *session) Keep(dirent *fs.Dirent) bool {
-	// NOTE: Only cache files and directories.
 	sattr := dirent.Inode.StableAttr
-	return s.cachePolicy != cacheNone && (fs.IsFile(sattr) || fs.IsDir(sattr))
+	if s.cachePolicy == cacheNone {
+		return false
+	}
+	// NOTE: Only cache files, directories, and symlinks.
+	return fs.IsFile(sattr) || fs.IsDir(sattr) || fs.IsSymlink(sattr)
 }
 
 // ResetInodeMappings implements fs.MountSourceOperations.ResetInodeMappings.