Merge branch 'eth-mpnic-add-basic-netdev-statistics'

Daniel Zahka says:

====================
eth: mpnic: add basic netdev statistics

Add basic netdev statistics and report them via ndo_get_stats64 and
netdev_stat_ops.

Track per queue netdev statistics such as Tx/Rx: packets, bytes, drops,
etc. The driver keeps per-queue state for statistics that is updated
mostly from the NAPI poll and ndo_start_xmit paths. The stats are made
available through the usual driver APIs.

When the netif is transitioned down, the per-queue stat counters are
folded into a global per-device set of counters, and then when the netif
is brought back up, the per-queue counters start counting again from 0.

Extra care is needed for implementing ndo_get_stats64 since the instance
lock is not taken. When ndo_get_stats64 races against ndo_stop and
ndo_open, the reader can attempt to read per-queue stats while the queue
count is changing. To deal with this, the writer publishes the
aggregated base stats and the active queue counts in a single RCU
versioned object.

Signed-off-by: Daniel Zahka <daniel.zahka@gmail.com>
====================

Link: https://patch.msgid.link/20261012-mpnic-counters3-v2-0-8afba81c2d5a@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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