[PATCH iproute2-next v9 0/2] tc: fq_pie: add per-flow class statistics support

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

FQ-PIE exposes no per-flow AQM state in userspace today. This series
adds tc support for printing per-flow statistics via
'tc -s class show', matching the kernel fq_pie class ops series.

The corresponding kernel series can be viewed here:
https://lore.kernel.org/netdev/20261109071017.438478-1-hemendranaik@gmail.com/

Both the kernel and iproute2 patches can also be found in GitHub:
- https://github.com/H-N41K/linux-net-next/tree/fq_pie_class_stats/
- https://github.com/H-N41K/iproute2-next/tree/fq_pie_class_stats/
---
Changelog:

v9:
- No code changes since v8.
- Rebased and reposted patch since corresponding kernel series was reposted.

v8:
- No code changes since v7.
- Rebased and reposted patch since corresponding kernel series was reposted.

v7: https://lore.kernel.org/all/20260922211139.38570-1-hemendranaik@gmail.com/
- Removed UAPI header changes. The series now contains 2 commits.

v6: https://lore.kernel.org/netdev/20260919061254.39678-1-hemendranaik@gmail.com/
- No code changes since v5.
- Rebased over the latest iproute2-next tree and re-submitted patch.

v5: https://lore.kernel.org/netdev/20260902040221.83734-1-hemendranaik@gmail.com/
- Addressed Sashiko review comments (folded into patch 1/3):
 - Dropped empty tc_fq_pie_xqd_stats placeholder; class_stats is now a direct
   struct member in the UAPI header.

v4: https://lore.kernel.org/netdev/20260727165028.106817-1-hemendranaik@gmail.com/
- Split into 3 patches: fq_pie class stats, pie avg_dq_rate
  formatting, and tc_pie_xstats comment fixes.

v3: https://lore.kernel.org/netdev/20260630184453.171410-1-hemendranaik@gmail.com/
- Moved print_nl() into each xstats type block to preserve output
  formatting.

v2: https://lore.kernel.org/netdev/20260614130729.10076-1-hemendranaik@gmail.com/
- Addressed ABI backward compatibility issue.

v1: https://lore.kernel.org/netdev/20260531131411.28213-1-hemendranaik@gmail.com/
- Initial submission

Hemendra M. Naik (2):
  tc: fq_pie: add support for printing per-flow PIE statistics
  tc: pie: print avg_dq_rate in human-readable format

 man/man8/tc-fq_pie.8 | 18 ++++++++++++++
 man/man8/tc-pie.8    |  2 +-
 tc/q_fq_pie.c        | 59 ++++++++++++++++++++++++++++++--------------
 tc/q_pie.c           |  4 +--
 4 files changed, 61 insertions(+), 22 deletions(-)

-- 
2.34.1