commit 50bd870a9e5cca9fcf5fb4c130c373643d7d9906
author Yossef Efraim <yossefe@mellanox.com> Sun Jan 14 11:39:10 2018 +0200
committer Steffen Klassert <steffen.klassert@secunet.com> Thu Jan 18 10:42:59 2018 +0100
tree e8195f25d0eab9eb269d97e360c573430c5af829
parent 4f7d58517f461aa6e7b7509668f04021e089323d

xfrm: Add ESN support for IPSec HW offload

This patch adds ESN support to IPsec device offload.
Adding new xfrm device operation to synchronize device ESN.

Signed-off-by: Yossef Efraim <yossefe@mellanox.com>
Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

net/xfrm/xfrm_device.c

diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c
index 7598250..93520106 100644
--- a/net/xfrm/xfrm_device.c
+++ b/net/xfrm/xfrm_device.c
@@ -147,8 +147,8 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
 	if (!x->type_offload)
 		return -EINVAL;
 
-	/* We don't yet support UDP encapsulation, TFC padding and ESN. */
-	if (x->encap || x->tfcpad || (x->props.flags & XFRM_STATE_ESN))
+	/* We don't yet support UDP encapsulation and TFC padding. */
+	if (x->encap || x->tfcpad)
 		return -EINVAL;
 
 	dev = dev_get_by_index(net, xuo->ifindex);
@@ -178,6 +178,13 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
 		return 0;
 	}
 
+	if (x->props.flags & XFRM_STATE_ESN &&
+	    !dev->xfrmdev_ops->xdo_dev_state_advance_esn) {
+		xso->dev = NULL;
+		dev_put(dev);
+		return -EINVAL;
+	}
+
 	xso->dev = dev;
 	xso->num_exthdrs = 1;
 	xso->flags = xuo->flags;

net/xfrm/xfrm_replay.c

diff --git a/net/xfrm/xfrm_replay.c b/net/xfrm/xfrm_replay.c
index 0250181..1d38c6a 100644
--- a/net/xfrm/xfrm_replay.c
+++ b/net/xfrm/xfrm_replay.c
@@ -551,6 +551,8 @@ static void xfrm_replay_advance_esn(struct xfrm_state *x, __be32 net_seq)
 			bitnr = replay_esn->replay_window - (diff - pos);
 	}
 
+	xfrm_dev_state_advance_esn(x);
+
 	nr = bitnr >> 5;
 	bitnr = bitnr & 0x1F;
 	replay_esn->bmp[nr] |= (1U << bitnr);