[PATCH net-next v3 0/2] net/sched: sch_fq_pie: add per-flow class statistics

["Hemendra M. Naik" <hemendranaik@gmail.com>]

 FQ-PIE runs an independent PIE controller per flow but exposes no
 per-flow statistics. This series wires up fq_pie_class_ops to expose
 per-flow AQM state (prob, delay, deficit, avg_dq_rate) 
 via 'tc -s class show', following a similar pattern as FQ-CoDel.
---
 Changelog:

 v3: 
  - No changes since v2.
  - Resending as the previous submission was deferred when the net-next tree closed during review.
  - Corresponding iproute2 patch updated in response to review comments; no changes required for this patch.

 v2: 
 - Addressed ABI backward compatibility issue for tc_fq_pie_xstats. (https://lore.kernel.org/netdev/20260614125000.6058-1-hemendranaik@gmail.com/)

 v1: 
 - https://lore.kernel.org/netdev/20260531125314.22492-1-hemendranaik@gmail.com/

Hemendra M. Naik (2):
  net/sched: sch_fq_pie: add per-flow statistics via class ops
  selftests: tc-testing: add fq_pie per-flow class stats test

 include/uapi/linux/pkt_sched.h                |  29 ++++-
 net/sched/sch_fq_pie.c                        | 118 +++++++++++++++++-
 tools/include/uapi/linux/pkt_sched.h          |   4 +-
 .../tc-testing/tc-tests/qdiscs/fq_pie.json    |  22 ++++
 4 files changed, 163 insertions(+), 10 deletions(-)

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2.34.1