[PATCH net-next] xfrm: gso partial offload support

[Boris Pismenny]

This patch introduces support for gso partial ESP offload.

Signed-off-by: Boris Pismenny <bor...@mellanox.com>
Signed-off-by: Raed Salem <ra...@mellanox.com>
---
 net/ipv4/esp4_offload.c | 10 +++++++---
 net/xfrm/xfrm_device.c  |  3 +++
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/net/ipv4/esp4_offload.c b/net/ipv4/esp4_offload.c
index 8756e0e..c6c84f2 100644
--- a/net/ipv4/esp4_offload.c
+++ b/net/ipv4/esp4_offload.c
@@ -138,9 +138,11 @@ static struct sk_buff *esp4_gso_segment(struct sk_buff 
*skb,
 
        skb->encap_hdr_csum = 1;
 
-       if (!(features & NETIF_F_HW_ESP) || x->xso.dev != skb->dev)
+       if ((!(skb->dev->gso_partial_features & NETIF_F_HW_ESP) &&
+            !(features & NETIF_F_HW_ESP)) || x->xso.dev != skb->dev)
                esp_features = features & ~(NETIF_F_SG | NETIF_F_CSUM_MASK);
-       else if (!(features & NETIF_F_HW_ESP_TX_CSUM))
+       else if (!(features & NETIF_F_HW_ESP_TX_CSUM) &&
+                !(skb->dev->gso_partial_features & NETIF_F_HW_ESP_TX_CSUM))
                esp_features = features & ~NETIF_F_CSUM_MASK;
 
        xo->flags |= XFRM_GSO_SEGMENT;
@@ -181,7 +183,9 @@ static int esp_xmit(struct xfrm_state *x, struct sk_buff 
*skb,  netdev_features_
        if (!xo)
                return -EINVAL;
 
-       if (!(features & NETIF_F_HW_ESP) || x->xso.dev != skb->dev) {
+       if ((!(features & NETIF_F_HW_ESP) &&
+            !(skb->dev->gso_partial_features & NETIF_F_HW_ESP)) ||
+           x->xso.dev != skb->dev) {
                xo->flags |= CRYPTO_FALLBACK;
                hw_offload = false;
        }
diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c
index 2db1626..e437b60 100644
--- a/net/xfrm/xfrm_device.c
+++ b/net/xfrm/xfrm_device.c
@@ -78,6 +78,7 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, 
netdev_features_t featur
        }
 
        if (!skb->next) {
+               esp_features |= skb->dev->gso_partial_features;
                x->outer_mode->xmit(x, skb);
 
                xo->flags |= XFRM_DEV_RESUME;
@@ -101,6 +102,8 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, 
netdev_features_t featur
 
        do {
                struct sk_buff *nskb = skb2->next;
+
+               esp_features |= skb->dev->gso_partial_features;
                skb_mark_not_on_list(skb2);
 
                xo = xfrm_offload(skb2);
-- 
1.8.3.1