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   1 From stable+bounces-41779-greg=kroah.com@vger.kernel.org Tue Apr 30 02:45:02 2024
   2 From: Rahul Rameshbabu <rrameshbabu@nvidia.com>
   3 Date: Mon, 29 Apr 2024 17:44:21 -0700
   4 Subject: macsec: Enable devices to advertise whether they update sk_buff md_dst during offloads
   5 To: stable@vger.kernel.org
   6 Cc: gregkh@linuxfoundation.org, bpoirier@nvidia.com, cratiu@nvidia.com, kuba@kernel.org, sd@queasysnail.net, Rahul Rameshbabu <rrameshbabu@nvidia.com>
   7 Message-ID: <20240430004439.299386-1-rrameshbabu@nvidia.com>
   8
   9 From: Rahul Rameshbabu <rrameshbabu@nvidia.com>
  10
  11 commit 475747a19316b08e856c666a20503e73d7ed67ed upstream.
  12
  13 Omit rx_use_md_dst comment in upstream commit since macsec_ops is not
  14 documented.
  15
  16 Cannot know whether a Rx skb missing md_dst is intended for MACsec or not
  17 without knowing whether the device is able to update this field during an
  18 offload. Assume that an offload to a MACsec device cannot support updating
  19 md_dst by default. Capable devices can advertise that they do indicate that
  20 an skb is related to a MACsec offloaded packet using the md_dst.
  21
  22 Cc: Sabrina Dubroca <sd@queasysnail.net>
  23 Cc: stable@vger.kernel.org
  24 Fixes: 860ead89b851 ("net/macsec: Add MACsec skb_metadata_dst Rx Data path support")
  25 Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
  26 Reviewed-by: Benjamin Poirier <bpoirier@nvidia.com>
  27 Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
  28 Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
  29 Link: https://lore.kernel.org/r/20240423181319.115860-2-rrameshbabu@nvidia.com
  30 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
  31 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  32 ---
  33  include/net/macsec.h |    1 +
  34  1 file changed, 1 insertion(+)
  35
  36 --- a/include/net/macsec.h
  37 +++ b/include/net/macsec.h
  38 @@ -302,6 +302,7 @@ struct macsec_ops {
  39         int (*mdo_get_tx_sa_stats)(struct macsec_context *ctx);
  40         int (*mdo_get_rx_sc_stats)(struct macsec_context *ctx);
  41         int (*mdo_get_rx_sa_stats)(struct macsec_context *ctx);
  42 +       bool rx_uses_md_dst;
  43  };
  44
  45  void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa);