Commit 83aa025f authored by Willem de Bruijn's avatar Willem de Bruijn Committed by David S. Miller

udp: add gso support to virtual devices

Virtual devices such as tunnels and bonding can handle large packets.
Only segment packets when reaching a physical or loopback device.
Signed-off-by: default avatarWillem de Bruijn <willemb@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2e8de857
...@@ -113,6 +113,13 @@ whatever headers there might be. ...@@ -113,6 +113,13 @@ whatever headers there might be.
NETIF_F_TSO_ECN means that hardware can properly split packets with CWR bit NETIF_F_TSO_ECN means that hardware can properly split packets with CWR bit
set, be it TCPv4 (when NETIF_F_TSO is enabled) or TCPv6 (NETIF_F_TSO6). set, be it TCPv4 (when NETIF_F_TSO is enabled) or TCPv6 (NETIF_F_TSO6).
* Transmit UDP segmentation offload
NETIF_F_GSO_UDP_GSO_L4 accepts a single UDP header with a payload that exceeds
gso_size. On segmentation, it segments the payload on gso_size boundaries and
replicates the network and UDP headers (fixing up the last one if less than
gso_size).
* Transmit DMA from high memory * Transmit DMA from high memory
On platforms where this is relevant, NETIF_F_HIGHDMA signals that On platforms where this is relevant, NETIF_F_HIGHDMA signals that
......
...@@ -55,8 +55,9 @@ enum { ...@@ -55,8 +55,9 @@ enum {
NETIF_F_GSO_SCTP_BIT, /* ... SCTP fragmentation */ NETIF_F_GSO_SCTP_BIT, /* ... SCTP fragmentation */
NETIF_F_GSO_ESP_BIT, /* ... ESP with TSO */ NETIF_F_GSO_ESP_BIT, /* ... ESP with TSO */
NETIF_F_GSO_UDP_BIT, /* ... UFO, deprecated except tuntap */ NETIF_F_GSO_UDP_BIT, /* ... UFO, deprecated except tuntap */
NETIF_F_GSO_UDP_L4_BIT, /* ... UDP payload GSO (not UFO) */
/**/NETIF_F_GSO_LAST = /* last bit, see GSO_MASK */ /**/NETIF_F_GSO_LAST = /* last bit, see GSO_MASK */
NETIF_F_GSO_UDP_BIT, NETIF_F_GSO_UDP_L4_BIT,
NETIF_F_FCOE_CRC_BIT, /* FCoE CRC32 */ NETIF_F_FCOE_CRC_BIT, /* FCoE CRC32 */
NETIF_F_SCTP_CRC_BIT, /* SCTP checksum offload */ NETIF_F_SCTP_CRC_BIT, /* SCTP checksum offload */
...@@ -147,6 +148,7 @@ enum { ...@@ -147,6 +148,7 @@ enum {
#define NETIF_F_HW_ESP_TX_CSUM __NETIF_F(HW_ESP_TX_CSUM) #define NETIF_F_HW_ESP_TX_CSUM __NETIF_F(HW_ESP_TX_CSUM)
#define NETIF_F_RX_UDP_TUNNEL_PORT __NETIF_F(RX_UDP_TUNNEL_PORT) #define NETIF_F_RX_UDP_TUNNEL_PORT __NETIF_F(RX_UDP_TUNNEL_PORT)
#define NETIF_F_HW_TLS_RECORD __NETIF_F(HW_TLS_RECORD) #define NETIF_F_HW_TLS_RECORD __NETIF_F(HW_TLS_RECORD)
#define NETIF_F_GSO_UDP_L4 __NETIF_F(GSO_UDP_L4)
#define for_each_netdev_feature(mask_addr, bit) \ #define for_each_netdev_feature(mask_addr, bit) \
for_each_set_bit(bit, (unsigned long *)mask_addr, NETDEV_FEATURE_COUNT) for_each_set_bit(bit, (unsigned long *)mask_addr, NETDEV_FEATURE_COUNT)
...@@ -216,6 +218,7 @@ enum { ...@@ -216,6 +218,7 @@ enum {
NETIF_F_GSO_GRE_CSUM | \ NETIF_F_GSO_GRE_CSUM | \
NETIF_F_GSO_IPXIP4 | \ NETIF_F_GSO_IPXIP4 | \
NETIF_F_GSO_IPXIP6 | \ NETIF_F_GSO_IPXIP6 | \
NETIF_F_GSO_UDP_L4 | \
NETIF_F_GSO_UDP_TUNNEL | \ NETIF_F_GSO_UDP_TUNNEL | \
NETIF_F_GSO_UDP_TUNNEL_CSUM) NETIF_F_GSO_UDP_TUNNEL_CSUM)
......
...@@ -4186,6 +4186,7 @@ static inline bool net_gso_ok(netdev_features_t features, int gso_type) ...@@ -4186,6 +4186,7 @@ static inline bool net_gso_ok(netdev_features_t features, int gso_type)
BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> 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)); 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 != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
return (features & feature) == feature; return (features & feature) == feature;
} }
......
...@@ -92,6 +92,7 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] ...@@ -92,6 +92,7 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN]
[NETIF_F_GSO_PARTIAL_BIT] = "tx-gso-partial", [NETIF_F_GSO_PARTIAL_BIT] = "tx-gso-partial",
[NETIF_F_GSO_SCTP_BIT] = "tx-sctp-segmentation", [NETIF_F_GSO_SCTP_BIT] = "tx-sctp-segmentation",
[NETIF_F_GSO_ESP_BIT] = "tx-esp-segmentation", [NETIF_F_GSO_ESP_BIT] = "tx-esp-segmentation",
[NETIF_F_GSO_UDP_L4_BIT] = "tx-udp-segmentation",
[NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc", [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
[NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp", [NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
......
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