udev: net_setup - allow matching on OriginalName=

This has been requested repeatedly, so let's give it a go. We explicitly do not allow matching
on names that have already been changed (from a previous udev run, or otherwise), and matching
on unpredictable names (ethX) is discouraged (but not currently disallowed).

We also currently allow:

[Match]
Name=veth0

[Link]
Name=my-name0
SomeOtherSetting=true

Which means that the link file will be applied the first time it is invoked, but
not on subsequent invocations, which may be surprising.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/udev/net/link-config.h b/src/udev/net/link-config.h
index 844ea98629..688f836144 100644
--- a/src/udev/net/link-config.h
+++ b/src/udev/net/link-config.h
@@ -55,6 +55,7 @@ struct link_config {
         char *match_path;
         char *match_driver;
         char *match_type;
+        char *match_name;
         Condition *match_host;
         Condition *match_virt;
         Condition *match_kernel;