tmpfs: Allow xattrs in the trusted namespace if creds has CAP_SYS_ADMIN.

This is needed to support the overlay opaque attribute.

PiperOrigin-RevId: 328552985

1 files changed, 6 insertions, 0 deletions

diff --git a/test/util/fs_util.h b/test/util/fs_util.h
index 8cdac23a1..044190657 100644
--- a/test/util/fs_util.h
+++ b/test/util/fs_util.h
@@ -17,6 +17,7 @@
 
 #include <dirent.h>
 #include <sys/stat.h>
+#include <sys/statfs.h>
 #include <sys/types.h>
 #include <unistd.h>
 
@@ -178,6 +179,11 @@ std::string CleanPath(absl::string_view path);
 // Returns the full path to the executable of the given pid or a PosixError.
 PosixErrorOr<std::string> ProcessExePath(int pid);
 
+#ifndef __fuchsia__
+// IsTmpfs returns true if the file at path is backed by tmpfs.
+PosixErrorOr<bool> IsTmpfs(const std::string& path);
+#endif  // __fucshia__
+
 namespace internal {
 // Not part of the public API.
 std::string JoinPathImpl(std::initializer_list<absl::string_view> paths);