tree 8816c45d969937d59a0259ee9c7a72a89f562bfa
parent cb20214d478db43756afa2a359feb4f05acc9022
author Chris Kuiper <ckuiper@google.com> 1407957774 -0700
committer Chris Kuiper <ckuiper@google.com> 1409091760 -0700

Mindspeed kernel: add new UDP socket option to report RX queue level

(this is the exact same change already applied to the bruno kernel via
https://gfiber-internal-review.googlesource.com/54693)

This adds a new socket option “SO_RXQ_ALLOC” that enables providing
the RX queue buffer allocation as ancillary data from the recvmsg()
system call. The value reported is a byte number and together with the
RX queue size (obtained via getsockopt(SO_RCVBUF) can be used to
calculate a percentage value.

Change-Id: I4fbadc6b9ef7549cb526cf78b7e432d8054370f5