pid1: do not fail if we get EPERM while setting up network name

In a user namespace container:
Feb 28 12:45:53 0b2420135953 systemd[1]: Starting Home Manager...
Feb 28 12:45:53 0b2420135953 systemd[21]: systemd-homed.service: Failed to set up network namespacing: Operation not permitted
Feb 28 12:45:53 0b2420135953 systemd[21]: systemd-homed.service: Failed at step NETWORK spawning /usr/lib/systemd/systemd-homed: Operation not permitted
Feb 28 12:45:53 0b2420135953 systemd[1]: systemd-homed.service: Main process exited, code=exited, status=225/NETWORK
Feb 28 12:45:53 0b2420135953 systemd[1]: systemd-homed.service: Failed with result 'exit-code'.
Feb 28 12:45:53 0b2420135953 systemd[1]: Failed to start Home Manager.

We should treat this similarly to the case where network namespace are not
supported at all.

https://bugzilla.redhat.com/show_bug.cgi?id=1807465

1 files changed, 6 insertions, 2 deletions

diff --git a/src/core/execute.c b/src/core/execute.c
index b05471223b..3911363c54 100644
--- a/src/core/execute.c
+++ b/src/core/execute.c
@@ -3511,13 +3511,17 @@ static int exec_child(
 
                 if (ns_type_supported(NAMESPACE_NET)) {
                         r = setup_netns(runtime->netns_storage_socket);
-                        if (r < 0) {
+                        if (r == -EPERM)
+                                log_unit_warning_errno(unit, r,
+                                                       "PrivateNetwork=yes is configured, but network namespace setup failed, ignoring: %m");
+                        else if (r < 0) {
                                 *exit_status = EXIT_NETWORK;
                                 return log_unit_error_errno(unit, r, "Failed to set up network namespacing: %m");
                         }
                 } else if (context->network_namespace_path) {
                         *exit_status = EXIT_NETWORK;
-                        return log_unit_error_errno(unit, SYNTHETIC_ERRNO(EOPNOTSUPP), "NetworkNamespacePath= is not supported, refusing.");
+                        return log_unit_error_errno(unit, SYNTHETIC_ERRNO(EOPNOTSUPP),
+                                                    "NetworkNamespacePath= is not supported, refusing.");
                 } else
                         log_unit_warning(unit, "PrivateNetwork=yes is configured, but the kernel does not support network namespaces, ignoring.");
         }