X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fcore%2Floopback-setup.c;h=67ce160c1982f9cb7084cc3e9b7898cc6d4c7c64;hb=e331e24649213f2e093e16e4d3d64ee823dfc375;hp=ca10e20a344cdb85980c475d739eecc0bf37ee03;hpb=2f0af4e120385e6078c96189f4a4d0cce0e12a3a;p=elogind.git

diff --git a/src/core/loopback-setup.c b/src/core/loopback-setup.c
index ca10e20a3..67ce160c1 100644
--- a/src/core/loopback-setup.c
+++ b/src/core/loopback-setup.c
@@ -27,15 +27,13 @@
 #include <stdlib.h>
 #include <unistd.h>
 
+#include "sd-rtnl.h"
 #include "util.h"
 #include "macro.h"
-#include "loopback-setup.h"
 #include "socket-util.h"
-#include "sd-rtnl.h"
 #include "rtnl-util.h"
-
-/* this is hardcoded in the kernel, so don't look it up */
-#define LOOPBACK_IFINDEX 1
+#include "missing.h"
+#include "loopback-setup.h"
 
 static int start_loopback(sd_rtnl *rtnl) {
         _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
@@ -85,12 +83,17 @@ int loopback_setup(void) {
                 return r;
 
         r = start_loopback(rtnl);
-        if (r == -EPERM) {
-                if (!check_loopback(rtnl))
-                        return log_warning_errno(EPERM, "Failed to configure loopback device: %m");
-        } else if (r < 0)
-                return log_warning_errno(r, "Failed to configure loopback device: %m");
+        if (r < 0) {
 
+                /* If we lack the permissions to configure the
+                 * loopback device, but we find it to be already
+                 * configured, let's exit cleanly, in order to
+                 * supported unprivileged containers. */
+                if (r == -EPERM && check_loopback(rtnl))
+                        return 0;
+
+                return log_warning_errno(r, "Failed to configure loopback device: %m");
+        }
 
         return 0;
 }