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xfrm: add support to HW update soft and hard limits

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Both in RX and TX, the traffic that performs IPsec packet offload
transformation is accounted by HW. It is needed to properly handle
hard limits that require to drop the packet.

It means that XFRM core needs to update internal counters with the one
that accounted by the HW, so new callbacks are introduced in this patch.

In case of soft or hard limit is occurred, the driver should call to
xfrm_state_check_expire() that will perform key rekeying exactly as
done by XFRM core.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Leon Romanovsky
2022-12-02 20:41:33 +02:00
committed by Steffen Klassert
parent 3c611d40c6
commit f3da86dc2c
3 changed files with 22 additions and 0 deletions
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include/linux/netdevice.h
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@@ -1040,6 +1040,7 @@ struct xfrmdev_ops {
bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
struct xfrm_state *x);
void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
void (*xdo_dev_state_update_curlft) (struct xfrm_state *x);
int (*xdo_dev_policy_add) (struct xfrm_policy *x);
void (*xdo_dev_policy_delete) (struct xfrm_policy *x);
void (*xdo_dev_policy_free) (struct xfrm_policy *x);