netdev - [PATCH net-next 0/2] net: xdp: handle frags with unreadable memory

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Message-ID: <20250905221539.2930285-1-kuba@kernel.org>
Date: Fri,  5 Sep 2025 15:15:37 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
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	pabeni@...hat.com,
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	Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next 0/2] net: xdp: handle frags with unreadable memory

Make XDP helpers compatible with unreadable memory. This is very
similar to how we handle pfmemalloc frags today. Record the info
in xdp_buf flags as frags get added and then update the skb once
allocated.

This series adds the unreadable memory metadata tracking to drivers
using xdp_build_skb_from*() with no changes on the driver side - hence
the only driver changes here are refactoring. Obviously, unreadable memory
is incompatible with XDP today, but thanks to xdp_build_skb_from_buf()
increasing number of drivers have a unified datapath, whether XDP is
enabled or not.

RFC: https://lore.kernel.org/20250812161528.835855-1-kuba@kernel.org

Jakub Kicinski (2):
  net: xdp: pass full flags to xdp_update_skb_shared_info()
  net: xdp: handle frags with unreadable memory

 include/net/xdp.h                             | 38 ++++++++++++-------
 drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c |  7 ++--
 drivers/net/ethernet/intel/i40e/i40e_txrx.c   | 15 ++++----
 drivers/net/ethernet/intel/ice/ice_txrx.c     | 15 ++++----
 drivers/net/ethernet/marvell/mvneta.c         |  7 ++--
 .../net/ethernet/mellanox/mlx5/core/en_rx.c   | 23 ++++++-----
 drivers/net/virtio_net.c                      |  7 ++--
 net/core/xdp.c                                | 21 +++++-----
 8 files changed, 69 insertions(+), 64 deletions(-)

-- 
2.51.0