Commit 475747a1 authored by Rahul Rameshbabu's avatar Rahul Rameshbabu Committed by Jakub Kicinski
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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: 860ead89 ("net/macsec: Add MACsec skb_metadata_dst Rx Data path support")
Signed-off-by: default avatarRahul Rameshbabu <rrameshbabu@nvidia.com>
Reviewed-by: default avatarBenjamin Poirier <bpoirier@nvidia.com>
Reviewed-by: default avatarCosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: default avatarSabrina Dubroca <sd@queasysnail.net>
Link: https://lore.kernel.org/r/20240423181319.115860-2-rrameshbabu@nvidia.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 4dcd0e83

include/net/macsec.h

+2 −0
Original line number Diff line number Diff line
@@ -321,6 +321,7 @@ struct macsec_context { 
 *	for the TX tag

 * @needed_tailroom: number of bytes reserved at the end of the sk_buff for the

 *	TX tag

 * @rx_uses_md_dst: whether MACsec device offload supports sk_buff md_dst

 */

struct macsec_ops {

	/* Device wide */
@@ -352,6 +353,7 @@ struct macsec_ops { 
				 struct sk_buff *skb);

	unsigned int needed_headroom;

	unsigned int needed_tailroom;

	bool rx_uses_md_dst;

};



void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa);