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macsec: Enable devices to advertise whether they update sk_buff md_dst during offloads
Cannot know whether a Rx skb missing md_dst is intended for MACsec or not
without knowing whether the device is able to update this field during an
offload. Assume that an offload to a MACsec device cannot support updating
md_dst by default. Capable devices can advertise that they do indicate that
an skb is related to a MACsec offloaded packet using the md_dst.
Cc: Sabrina Dubroca <sd@queasysnail.net>
Cc: stable@vger.kernel.org
Fixes: 860ead89b8
("net/macsec: Add MACsec skb_metadata_dst Rx Data path support")
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Reviewed-by: Benjamin Poirier <bpoirier@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Link: https://lore.kernel.org/r/20240423181319.115860-2-rrameshbabu@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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@ -321,6 +321,7 @@ struct macsec_context {
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* for the TX tag
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* @needed_tailroom: number of bytes reserved at the end of the sk_buff for the
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* TX tag
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* @rx_uses_md_dst: whether MACsec device offload supports sk_buff md_dst
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*/
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struct macsec_ops {
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/* Device wide */
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@ -352,6 +353,7 @@ struct macsec_ops {
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struct sk_buff *skb);
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unsigned int needed_headroom;
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unsigned int needed_tailroom;
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bool rx_uses_md_dst;
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};
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void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa);
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