From 4b9303ec2924f73180408479a0f160868165f756 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Mon, 4 Sep 2017 10:55:51 +0900
Subject: [PATCH] elogind-mount: allow to specify an arbitrary string for
 arg_mount_what when vfs is used

Fixes #6591.
---
 src/basic/mount-util.c | 26 ++++++++++++++++++++++++++
 src/basic/mount-util.h |  1 +
 2 files changed, 27 insertions(+)

diff --git a/src/basic/mount-util.c b/src/basic/mount-util.c
index b38363076..adf60c7ee 100644
--- a/src/basic/mount-util.c
+++ b/src/basic/mount-util.c
@@ -552,6 +552,32 @@ bool fstype_is_network(const char *fstype) {
         return nulstr_contains(table, fstype);
 }
 
+bool fstype_is_api_vfs(const char *fstype) {
+        static const char table[] =
+                "autofs\0"
+                "bpf\0"
+                "cgroup\0"
+                "cgroup2\0"
+                "configfs\0"
+                "cpuset\0"
+                "debugfs\0"
+                "devpts\0"
+                "devtmpfs\0"
+                "efivarfs\0"
+                "hugetlbfs\0"
+                "mqueue\0"
+                "proc\0"
+                "pstore\0"
+                "ramfs\0"
+                "securityfs\0"
+                "sysfs\0"
+                "tmpfs\0"
+                "tracefs\0"
+                ;
+
+        return nulstr_contains(table, fstype);
+}
+
 int repeat_unmount(const char *path, int flags) {
         bool done = false;
 
diff --git a/src/basic/mount-util.h b/src/basic/mount-util.h
index 5ce7c9747..571a0eb50 100644
--- a/src/basic/mount-util.h
+++ b/src/basic/mount-util.h
@@ -48,6 +48,7 @@ DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
 #if 0 /// UNNEEDED by elogind
 bool fstype_is_network(const char *fstype);
 #endif // 0
+bool fstype_is_api_vfs(const char *fstype);
 
 union file_handle_union {
         struct file_handle handle;
-- 
2.30.2