networkd: print the ifindex of added links

This debug information may be useful when comapring to dropped rtnetlink messages.

3 files changed, 13 insertions, 8 deletions

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 889efc8c2f..bc8ca21c82 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -89,7 +89,7 @@ void link_free(Link *link) {
         free(link);
 }
 
-int link_add(Manager *m, struct udev_device *device) {
+int link_add(Manager *m, struct udev_device *device, Link **ret) {
         Link *link;
         Network *network;
         int r;
@@ -101,18 +101,22 @@ int link_add(Manager *m, struct udev_device *device) {
 
         ifindex = udev_device_get_ifindex(device);
         link = hashmap_get(m->links, &ifindex);
-        if (link)
+        if (link) {
+                *ret = link;
                 return -EEXIST;
+        }
 
         r = link_new(m, device, &link);
         if (r < 0)
                 return r;
 
+        *ret = link;
+
         devtype = udev_device_get_devtype(device);
         if (streq_ptr(devtype, "bridge")) {
                 r = bridge_set_link(m, link);
-                if (r < 0)
-                        return r == -ENOENT ? 0 : r;
+                if (r < 0 && r != -ENOENT)
+                        return r;
         }
 
         r = network_get(m, device, &network);
diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index 11c3efe901..7b0c5d7653 100644
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -143,17 +143,18 @@ static int manager_process_link(Manager *m, struct udev_device *device) {
 
                 link_free(link);
         } else {
-                r = link_add(m, device);
+                r = link_add(m, device, &link);
                 if (r < 0) {
                         if (r == -EEXIST)
                                 log_debug("%s: link already exists, ignoring",
-                                          udev_device_get_sysname(device));
+                                          link->ifname);
                         else
                                 log_error("%s: could not handle link: %s",
                                           udev_device_get_sysname(device),
                                           strerror(-r));
                 } else
-                        log_debug("%s: link added", udev_device_get_sysname(device));
+                        log_debug("%s: link (with ifindex %" PRIu64") added",
+                                  link->ifname, link->ifindex);
         }
 
         return 0;
diff --git a/src/network/networkd.h b/src/network/networkd.h
index cad81d9b71..3b2908090f 100644
--- a/src/network/networkd.h
+++ b/src/network/networkd.h
@@ -269,7 +269,7 @@ int config_parse_label(const char *unit, const char *filename, unsigned line,
 
 int link_new(Manager *manager, struct udev_device *device, Link **ret);
 void link_free(Link *link);
-int link_add(Manager *manager, struct udev_device *device);
+int link_add(Manager *manager, struct udev_device *device, Link **ret);
 int link_configure(Link *link);
 
 int link_update(Link *link, sd_rtnl_message *message);