[PATCH RFC 2/5] net: Add fraglist GRO/GSO feature flags

[Steffen Klassert]

This adds new Fraglist GRO/GSO feature flags. They will be used
to configure fraglist GRO/GSO what will be implemented with some
followup paches.

Signed-off-by: Steffen Klassert <steffen.klass...@secunet.com>
---
 include/linux/netdev_features.h | 6 +++++-
 include/linux/netdevice.h       | 1 +
 include/linux/skbuff.h          | 2 ++
 net/core/ethtool.c              | 1 +
 4 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
index 4b19c544c59a..b239507da2a0 100644
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -53,8 +53,9 @@ enum {
        NETIF_F_GSO_ESP_BIT,            /* ... ESP with TSO */
        NETIF_F_GSO_UDP_BIT,            /* ... UFO, deprecated except tuntap */
        NETIF_F_GSO_UDP_L4_BIT,         /* ... UDP payload GSO (not UFO) */
+       NETIF_F_GSO_FRAGLIST_BIT,               /* ... Fraglist GSO */
        /**/NETIF_F_GSO_LAST =          /* last bit, see GSO_MASK */
-               NETIF_F_GSO_UDP_L4_BIT,
+               NETIF_F_GSO_FRAGLIST_BIT,
 
        NETIF_F_FCOE_CRC_BIT,           /* FCoE CRC32 */
        NETIF_F_SCTP_CRC_BIT,           /* SCTP checksum offload */
@@ -80,6 +81,7 @@ enum {
 
        NETIF_F_GRO_HW_BIT,             /* Hardware Generic receive offload */
        NETIF_F_HW_TLS_RECORD_BIT,      /* Offload TLS record */
+       NETIF_F_GRO_FRAGLIST_BIT,       /* Fraglist GRO */
 
        /*
         * Add your fresh new feature above and remember to update
@@ -150,6 +152,8 @@ enum {
 #define NETIF_F_GSO_UDP_L4     __NETIF_F(GSO_UDP_L4)
 #define NETIF_F_HW_TLS_TX      __NETIF_F(HW_TLS_TX)
 #define NETIF_F_HW_TLS_RX      __NETIF_F(HW_TLS_RX)
+#define NETIF_F_GRO_FRAGLIST   __NETIF_F(GRO_FRAGLIST)
+#define NETIF_F_GSO_FRAGLIST   __NETIF_F(GSO_FRAGLIST)
 
 /* Finds the next feature with the highest number of the range of start till 0.
  */
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index d7d5626002e9..4917cf513bd1 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -4524,6 +4524,7 @@ static inline bool net_gso_ok(netdev_features_t features, 
int gso_type)
        BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
        BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
        BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> 
NETIF_F_GSO_SHIFT));
+       BUILD_BUG_ON(SKB_GSO_FRAGLIST != (NETIF_F_GSO_FRAGLIST >> 
NETIF_F_GSO_SHIFT));
 
        return (features & feature) == feature;
 }
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 028e684fa974..c72540813ea7 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -595,6 +595,8 @@ enum {
        SKB_GSO_UDP = 1 << 16,
 
        SKB_GSO_UDP_L4 = 1 << 17,
+
+       SKB_GSO_FRAGLIST = 1 << 18,
 };
 
 #if BITS_PER_LONG > 32
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 6288e69e94fc..2eaf94debbf6 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -111,6 +111,7 @@ static const char 
netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN]
        [NETIF_F_HW_TLS_RECORD_BIT] =   "tls-hw-record",
        [NETIF_F_HW_TLS_TX_BIT] =        "tls-hw-tx-offload",
        [NETIF_F_HW_TLS_RX_BIT] =        "tls-hw-rx-offload",
+       [NETIF_F_GRO_FRAGLIST_BIT] =     "rx-gro-list",
 };
 
 static const char
-- 
2.17.1