Merge pull request #4067 from poettering/invocation-id

Add an "invocation ID" concept to the service manager

1 files changed, 21 insertions, 0 deletions

diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index 7873f88785..20bdbc39d0 100644
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -1361,6 +1361,26 @@ int unit_attach_pids_to_cgroup(Unit *u) {
         return 0;
 }
 
+static void cgroup_xattr_apply(Unit *u) {
+        char ids[SD_ID128_STRING_MAX];
+        int r;
+
+        assert(u);
+
+        if (!MANAGER_IS_SYSTEM(u->manager))
+                return;
+
+        if (sd_id128_is_null(u->invocation_id))
+                return;
+
+        r = cg_set_xattr(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path,
+                         "trusted.invocation_id",
+                         sd_id128_to_string(u->invocation_id, ids), 32,
+                         0);
+        if (r < 0)
+                log_unit_warning_errno(u, r, "Failed to set invocation ID on control group %s, ignoring: %m", u->cgroup_path);
+}
+
 static bool unit_has_mask_realized(Unit *u, CGroupMask target_mask, CGroupMask enable_mask) {
         assert(u);
 
@@ -1404,6 +1424,7 @@ static int unit_realize_cgroup_now(Unit *u, ManagerState state) {
 
         /* Finally, apply the necessary attributes. */
         cgroup_context_apply(u, target_mask, state);
+        cgroup_xattr_apply(u);
 
         return 0;
 }