linux-kernel - [PATCH net-next v2 0/4] netdevsim: implement RX statistics using NETDEV_PCPU_STAT

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Message-Id: <20250613-netdevsim_stat-v2-0-98fa38836c48@debian.org>
Date: Fri, 13 Jun 2025 03:39:57 -0700
From: Breno Leitao <leitao@...ian.org>
To: Jakub Kicinski <kuba@...nel.org>, Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Paolo Abeni <pabeni@...hat.com>, David Wei <dw@...idwei.uk>, 
 Shuah Khan <shuah@...nel.org>, Simon Horman <horms@...nel.org>, joe@...a.to
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-kselftest@...r.kernel.org, Breno Leitao <leitao@...ian.org>, 
 kernel-team@...a.com
Subject: [PATCH net-next v2 0/4] netdevsim: implement RX statistics using
 NETDEV_PCPU_STAT_DSTATS

The netdevsim driver previously lacked RX statistics support, which
prevented its use with the GenerateTraffic() test framework, as this
framework verifies traffic flow by checking RX byte counts.

This patch migrates netdevsim from its custom statistics collection to
the NETDEV_PCPU_STAT_DSTATS framework, as suggested by Jakub. This
change not only standardizes the statistics handling but also adds the
necessary RX statistics support required by the test framework.

Signed-off-by: Breno Leitao <leitao@...ian.org>
---
Changes in v2:
- Changed the RX collection place from nsim_napi_rx() to nsim_rcv (Joe
  Damato)
- Collect RX dropped packets statistic in nsim_queue_free() (Jakub)
- Added a helper in dstat to add values to RX dropped packets
- Link to v1: https://lore.kernel.org/r/20250611-netdevsim_stat-v1-0-c11b657d96bf@debian.org

---
Breno Leitao (4):
      netdevsim: migrate to dstats stats collection
      netdevsim: collect statistics at RX side
      net: add dev_dstats_rx_dropped_add() helper
      netdevsim: account dropped packet length in stats on queue free

 drivers/net/netdevsim/netdev.c    | 48 ++++++++++++++++-----------------------
 drivers/net/netdevsim/netdevsim.h |  5 ----
 include/linux/netdevice.h         | 10 ++++++++
 3 files changed, 29 insertions(+), 34 deletions(-)
---
base-commit: 6d4e01d29d87356924f1521ca6df7a364e948f13
change-id: 20250610-netdevsim_stat-95995921e03e

Best regards,
-- 
Breno Leitao <leitao@...ian.org>