core: hook up MountFlags= to the transient unit logic

This makes "systemd-run -p MountFlags=shared -t /bin/sh" work, by making
MountFlags= to the list of properties that may be accessed transiently.

2 files changed, 35 insertions, 0 deletions

diff --git a/src/basic/mount-util.c b/src/basic/mount-util.c
index 352c3505fb..8970050408 100644
--- a/src/basic/mount-util.c
+++ b/src/basic/mount-util.c
@@ -689,3 +689,35 @@ int umount_verbose(const char *what) {
                 return log_error_errno(errno, "Failed to unmount %s: %m", what);
         return 0;
 }
+
+const char *mount_propagation_flags_to_string(unsigned long flags) {
+
+        switch (flags & (MS_SHARED|MS_SLAVE|MS_PRIVATE)) {
+
+        case MS_SHARED:
+                return "shared";
+
+        case MS_SLAVE:
+                return "slave";
+
+        case MS_PRIVATE:
+                return "private";
+        }
+
+        return NULL;
+}
+
+unsigned long mount_propagation_flags_from_string(const char *name) {
+
+        if (isempty(name))
+                return 0;
+
+        if (streq(name, "shared"))
+                return MS_SHARED;
+        if (streq(name, "slave"))
+                return MS_SLAVE;
+        if (streq(name, "private"))
+                return MS_PRIVATE;
+
+        return 0;
+}
diff --git a/src/basic/mount-util.h b/src/basic/mount-util.h
index b840956d63..c8049198d4 100644
--- a/src/basic/mount-util.h
+++ b/src/basic/mount-util.h
@@ -61,3 +61,6 @@ int mount_verbose(
                 unsigned long flags,
                 const char *options);
 int umount_verbose(const char *where);
+
+const char *mount_propagation_flags_to_string(unsigned long flags);
+unsigned long mount_propagation_flags_from_string(const char *name);