Some operations like interface creation may need to return metadata - in this case, interface name - back to the caller if the operation is successful. This change implements attaching an `NLMSGERR_ATTR_COOKIE` nla to the operation reply message via `nlmsg_report_cookie()`. Additionally, on successful interface creation, interface index and interface name are returned in the `IFLA_NEW_IFINDEX` and `IFLA_IFNAME TLVs, encapsulated in the `NLMSGERR_ATTR_COOKIE`. Reviewed By: pauamma Differential Revision: https://reviews.freebsd.org/D38283 MFC after: 1 week |
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