[PATCH net-next 0/7] net: sched: gred: introduce per-virtual queue attributes

[Jakub Kicinski <jakub.kicinski@netronome.com>]

Hi!

This series updates the GRED Qdisc.  The Qdisc matches nfp offload very
well, but before we can offload it there are a number of improvements
to make.

First few patches add extack messages to the Qdisc and pass extack
to netlink validation.

Next a new netlink attribute group is added, to allow GRED to be
extended more easily.  Currently GRED passes C structures as attributes,
and even an array of C structs for virtual queue configuration.  User
space has hard coded the expected length of that array, so adding new
fields is not possible.

New two-level attribute group is added:

  [TCA_GRED_VQ_LIST]
    [TCA_GRED_VQ_ENTRY]
      [TCA_GRED_VQ_DP]
      [TCA_GRED_VQ_FLAGS]
      [TCA_GRED_VQ_STAT_*]
    [TCA_GRED_VQ_ENTRY]
      [TCA_GRED_VQ_DP]
      [TCA_GRED_VQ_FLAGS]
      [TCA_GRED_VQ_STAT_*]
    [TCA_GRED_VQ_ENTRY]
       ...

Statistics are dump only. Patch 4 switches the byte counts to be 64 bit,
and patch 5 introduces the new stats attributes for dump.  Patch 6
switches RED flags to be per-virtual queue, and patch 7 allows them
to be dumped and set at virtual queue granularity.


Jakub Kicinski (7):
  net: sched: gred: separate error and non-error path in gred_change()
  net: sched: gred: pass extack to nla_parse_nested()
  net: sched: gred: use extack to provide more details on configuration
    errors
  net: sched: gred: store bytesin as a 64 bit value
  net: sched: gred: provide a better structured dump and expose stats
  net: sched: gred: store red flags per virtual queue
  net: sched: gred: allow manipulating per-DP RED flags

 include/uapi/linux/pkt_sched.h |  27 ++++
 net/sched/sch_gred.c           | 281 +++++++++++++++++++++++++++++----
 2 files changed, 281 insertions(+), 27 deletions(-)

-- 
2.17.1