unit: use weaker dependencies between mount and device units in --user mode

When running in user mode unmounting of mount units when a device
vanishes is unlikely to work, and even if it would work is already done
by PID 1 anyway. HEnce, when creating implicit dependencies between
mount units and their backing devices, created a Wants= type dependency
in --user mode, but leave a BindsTo= dependency in --system mode.

diff --git a/src/core/unit.c b/src/core/unit.c
index ad5348b57bc64b7c262985b699275d360a354031..875befa0a200e5ce83771316be36c8561009e8be 100644 (file)
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -2839,7 +2839,7 @@ int unit_add_node_link(Unit *u, const char *what, bool wants) {
         if (r < 0)
                 return r;
 
-        r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BINDS_TO, device, true);
+        r = unit_add_two_dependencies(u, UNIT_AFTER, u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_BINDS_TO : UNIT_WANTS, device, true);
         if (r < 0)
                 return r;