On Tue, 2 Oct 2018 09:11:17 -0600, David Ahern wrote: > Generically speaking a filter modifies the output based on the input. > Specifying a target namespace is an input to the dump that modifies the > output.
That's conventionally called "algorithm" :-) Let's just say we have a different understanding of what "filter" is. Perhaps we should look at it from a different side. What is the use case of having NLM_F_DUMP_FILTERED set for IFA_TARGET_NETNSID? How is this going to be used by applications? > Yes, you can do it in userspace which is what iproute2 has done to this > point, but it is grossly inefficient and that inefficiency has > implications at scale. You can't do that with IFA_TARGET_NETNSID. Which is my point. Without the flag, you don't get a list of all interfaces in all net name spaces. Jiri
