From 37c1da056b63323514d71d2832a01ea916f004cc Mon Sep 17 00:00:00 2001
From: Lennart Poettering <[email protected]>
Date: Fri, 5 Oct 2018 22:56:40 +0200
Subject: [PATCH] nspawn: rework how we allocate/kill scopes

Fixes: #6347
(cherry picked from commit 1d78fea2d6230e0aafa2603abc8f1f51966ef134)

Resolves: #1697893
---
 src/nspawn/nspawn-register.c | 64 +++++++++++++++++++++++++++++++++++-
 src/nspawn/nspawn-register.h |  1 +
 src/nspawn/nspawn.c          |  8 +++--
 3 files changed, 70 insertions(+), 3 deletions(-)

diff --git a/src/nspawn/nspawn-register.c b/src/nspawn/nspawn-register.c
index 0d45cce66e..a7cdfc1c7d 100644
--- a/src/nspawn/nspawn-register.c
+++ b/src/nspawn/nspawn-register.c
@@ -274,10 +274,12 @@ int allocate_scope(
 
         description = strjoina("Container ", machine_name);
 
-        r = sd_bus_message_append(m, "(sv)(sv)(sv)(sv)",
+        r = sd_bus_message_append(m, "(sv)(sv)(sv)(sv)(sv)(sv)",
                                   "PIDs", "au", 1, pid,
                                   "Description", "s", description,
                                   "Delegate", "b", 1,
+                                  "CollectMode", "s", "inactive-or-failed",
+                                  "AddRef", "b", 1,
                                   "Slice", "s", isempty(slice) ? SPECIAL_MACHINE_SLICE : slice);
         if (r < 0)
                 return bus_log_create_error(r);
@@ -324,3 +326,63 @@ int allocate_scope(
 
         return 0;
 }
+
+int terminate_scope(
+                sd_bus *bus,
+                const char *machine_name) {
+
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+        _cleanup_free_ char *scope = NULL;
+        int r;
+
+        r = unit_name_mangle_with_suffix(machine_name, 0, ".scope", &scope);
+        if (r < 0)
+                return log_error_errno(r, "Failed to mangle scope name: %m");
+
+        r = sd_bus_call_method(
+                        bus,
+                        "org.freedesktop.systemd1",
+                        "/org/freedesktop/systemd1",
+                        "org.freedesktop.systemd1.Manager",
+                        "AbandonScope",
+                        &error,
+                        NULL,
+                        "s",
+                        scope);
+        if (r < 0) {
+                log_debug_errno(r, "Failed to abandon scope '%s', ignoring: %s", scope, bus_error_message(&error, r));
+                sd_bus_error_free(&error);
+        }
+
+        r = sd_bus_call_method(
+                        bus,
+                        "org.freedesktop.systemd1",
+                        "/org/freedesktop/systemd1",
+                        "org.freedesktop.systemd1.Manager",
+                        "KillUnit",
+                        &error,
+                        NULL,
+                        "ssi",
+                        scope,
+                        "all",
+                        (int32_t) SIGKILL);
+        if (r < 0) {
+                log_debug_errno(r, "Failed to SIGKILL scope '%s', ignoring: %s", scope, bus_error_message(&error, r));
+                sd_bus_error_free(&error);
+        }
+
+        r = sd_bus_call_method(
+                        bus,
+                        "org.freedesktop.systemd1",
+                        "/org/freedesktop/systemd1",
+                        "org.freedesktop.systemd1.Manager",
+                        "UnrefUnit",
+                        &error,
+                        NULL,
+                        "s",
+                        scope);
+        if (r < 0)
+                log_debug_errno(r, "Failed to drop reference to scope '%s', ignoring: %s", scope, bus_error_message(&error, r));
+
+        return 0;
+}
diff --git a/src/nspawn/nspawn-register.h b/src/nspawn/nspawn-register.h
index ddd8b053a3..05f5776f23 100644
--- a/src/nspawn/nspawn-register.h
+++ b/src/nspawn/nspawn-register.h
@@ -11,3 +11,4 @@ int register_machine(sd_bus *bus, const char *machine_name, pid_t pid, const cha
 int terminate_machine(sd_bus *bus, const char *machine_name);
 
 int allocate_scope(sd_bus *bus, const char *machine_name, pid_t pid, const char *slice, CustomMount *mounts, unsigned n_mounts, int kill_signal, char **properties);
+int terminate_scope(sd_bus *bus, const char *machine_name);
diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
index c4943f6eb7..b40411dcd0 100644
--- a/src/nspawn/nspawn.c
+++ b/src/nspawn/nspawn.c
@@ -4065,8 +4065,12 @@ static int run(int master,
                 putc('\n', stdout);
 
         /* Kill if it is not dead yet anyway */
-        if (arg_register && !arg_keep_unit && bus)
-                terminate_machine(bus, arg_machine);
+        if (bus) {
+                if (arg_register)
+                        terminate_machine(bus, arg_machine);
+                else if (!arg_keep_unit)
+                        terminate_scope(bus, arg_machine);
+        }
 
         /* Normally redundant, but better safe than sorry */
         (void) kill(*pid, SIGKILL);