net: Add ESP offload features

This patch adds netdev features to configure IPsec offloads.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
index 9a04195..1d4737c 100644 (file)
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -54,8 +54,9 @@ enum {
                                         */
        NETIF_F_GSO_TUNNEL_REMCSUM_BIT, /* ... TUNNEL with TSO & REMCSUM */
        NETIF_F_GSO_SCTP_BIT,           /* ... SCTP fragmentation */
+       NETIF_F_GSO_ESP_BIT,            /* ... ESP with TSO */
        /**/NETIF_F_GSO_LAST =          /* last bit, see GSO_MASK */
-               NETIF_F_GSO_SCTP_BIT,
+               NETIF_F_GSO_ESP_BIT,
 
        NETIF_F_FCOE_CRC_BIT,           /* FCoE CRC32 */
        NETIF_F_SCTP_CRC_BIT,           /* SCTP checksum offload */
@@ -73,6 +74,8 @@ enum {
        NETIF_F_HW_L2FW_DOFFLOAD_BIT,   /* Allow L2 Forwarding in Hardware */
 
        NETIF_F_HW_TC_BIT,              /* Offload TC infrastructure */
+       NETIF_F_HW_ESP_BIT,             /* Hardware ESP transformation offload */
+       NETIF_F_HW_ESP_TX_CSUM_BIT,     /* ESP with TX checksum offload */
 
        /*
         * Add your fresh new feature above and remember to update
@@ -129,11 +132,14 @@ enum {
 #define NETIF_F_GSO_PARTIAL     __NETIF_F(GSO_PARTIAL)
 #define NETIF_F_GSO_TUNNEL_REMCSUM __NETIF_F(GSO_TUNNEL_REMCSUM)
 #define NETIF_F_GSO_SCTP       __NETIF_F(GSO_SCTP)
+#define NETIF_F_GSO_ESP                __NETIF_F(GSO_ESP)
 #define NETIF_F_HW_VLAN_STAG_FILTER __NETIF_F(HW_VLAN_STAG_FILTER)
 #define NETIF_F_HW_VLAN_STAG_RX        __NETIF_F(HW_VLAN_STAG_RX)
 #define NETIF_F_HW_VLAN_STAG_TX        __NETIF_F(HW_VLAN_STAG_TX)
 #define NETIF_F_HW_L2FW_DOFFLOAD       __NETIF_F(HW_L2FW_DOFFLOAD)
 #define NETIF_F_HW_TC          __NETIF_F(HW_TC)
+#define NETIF_F_HW_ESP         __NETIF_F(HW_ESP)
+#define NETIF_F_HW_ESP_TX_CSUM __NETIF_F(HW_ESP_TX_CSUM)
 
 #define for_each_netdev_feature(mask_addr, bit)        \
        for_each_set_bit(bit, (unsigned long *)mask_addr, NETDEV_FEATURE_COUNT)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index cc07c3b..5bb03d1 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -4070,6 +4070,7 @@ static inline bool net_gso_ok(netdev_features_t features, int gso_type)
        BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
        BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
        BUILD_BUG_ON(SKB_GSO_SCTP    != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
+       BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
 
        return (features & feature) == feature;
 }

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 741d75c..81ef53f 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -492,6 +492,8 @@ enum {
        SKB_GSO_TUNNEL_REMCSUM = 1 << 14,
 
        SKB_GSO_SCTP = 1 << 15,
+
+       SKB_GSO_ESP = 1 << 16,
 };
 
 #if BITS_PER_LONG > 32

diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 905a88a..03111a2 100644 (file)
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -90,6 +90,7 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN]
        [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
        [NETIF_F_GSO_PARTIAL_BIT] =      "tx-gso-partial",
        [NETIF_F_GSO_SCTP_BIT] =         "tx-sctp-segmentation",
+       [NETIF_F_GSO_ESP_BIT] =          "tx-esp-segmentation",
 
        [NETIF_F_FCOE_CRC_BIT] =         "tx-checksum-fcoe-crc",
        [NETIF_F_SCTP_CRC_BIT] =        "tx-checksum-sctp",
@@ -103,6 +104,8 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN]
        [NETIF_F_RXALL_BIT] =            "rx-all",
        [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
        [NETIF_F_HW_TC_BIT] =            "hw-tc-offload",
+       [NETIF_F_HW_ESP_BIT] =           "esp-hw-offload",
+       [NETIF_F_HW_ESP_TX_CSUM_BIT] =   "esp-tx-csum-hw-offload",
 };
 
 static const char