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Date: Wed, 17 Dec 2014 13:20:46 -0500
From: Vladislav Yasevich <vyasevich@...il.com>
To: netdev@...r.kernel.org
Cc: virtualization@...ts.linux-foundation.org, mst@...hat.com,
ben@...adent.org.uk, stefanha@...hat.com,
Vladislav Yasevich <vyasevic@...hat.com>
Subject: [PATCH 01/10] core: Split out UFO6 support
Split IPv6 support for UFO into its own feature similiar to TSO.
This will later allow us to re-enable UFO support for virtio-net
devices.
Signed-off-by: Vladislav Yasevich <vyasevic@...hat.com>
---
include/linux/netdev_features.h | 7 +++++--
include/linux/netdevice.h | 1 +
include/linux/skbuff.h | 1 +
net/core/dev.c | 35 +++++++++++++++++++----------------
net/core/ethtool.c | 2 +-
5 files changed, 27 insertions(+), 19 deletions(-)
diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
index dcfdecb..a078945 100644
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -48,8 +48,9 @@ enum {
NETIF_F_GSO_UDP_TUNNEL_BIT, /* ... UDP TUNNEL with TSO */
NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT,/* ... UDP TUNNEL with TSO & CSUM */
NETIF_F_GSO_MPLS_BIT, /* ... MPLS segmentation */
+ NETIF_F_UFO6_BIT, /* ... UDPv6 fragmentation */
/**/NETIF_F_GSO_LAST = /* last bit, see GSO_MASK */
- NETIF_F_GSO_MPLS_BIT,
+ NETIF_F_UFO6_BIT,
NETIF_F_FCOE_CRC_BIT, /* FCoE CRC32 */
NETIF_F_SCTP_CSUM_BIT, /* SCTP checksum offload */
@@ -109,6 +110,7 @@ enum {
#define NETIF_F_TSO_ECN __NETIF_F(TSO_ECN)
#define NETIF_F_TSO __NETIF_F(TSO)
#define NETIF_F_UFO __NETIF_F(UFO)
+#define NETIF_F_UFO6 __NETIF_F(UFO6)
#define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED)
#define NETIF_F_RXFCS __NETIF_F(RXFCS)
#define NETIF_F_RXALL __NETIF_F(RXALL)
@@ -141,7 +143,7 @@ enum {
/* List of features with software fallbacks. */
#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
- NETIF_F_TSO6 | NETIF_F_UFO)
+ NETIF_F_TSO6 | NETIF_F_UFO | NETIF_F_UFO6)
#define NETIF_F_GEN_CSUM NETIF_F_HW_CSUM
#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
@@ -149,6 +151,7 @@ enum {
#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
#define NETIF_F_ALL_TSO (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
+#define NETIF_F_ALL_UFO (NETIF_F_UFO | NETIF_F_UFO6)
#define NETIF_F_ALL_FCOE (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
NETIF_F_FSO)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 74fd5d3..86af10a 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3559,6 +3559,7 @@ static inline bool net_gso_ok(netdev_features_t features, int gso_type)
/* check flags correspondence */
BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
+ BUILD_BUG_ON(SKB_GSO_UDP6 != (NETIF_F_UFO6 >> NETIF_F_GSO_SHIFT));
BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 6c8b6f6..8538b67 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -372,6 +372,7 @@ enum {
SKB_GSO_MPLS = 1 << 12,
+ SKB_GSO_UDP6 = 1 << 13
};
#if BITS_PER_LONG > 32
diff --git a/net/core/dev.c b/net/core/dev.c
index 945bbd0..fa4d2ee 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5929,6 +5929,12 @@ static netdev_features_t netdev_fix_features(struct net_device *dev,
features &= ~NETIF_F_ALL_TSO;
}
+ /* UFO requires that SG is present as well */
+ if ((features & NETIF_F_ALL_UFO) && !(features & NETIF_F_SG)) {
+ netdev_dbg(dev, "Dropping UFO features since no SG feature.\n");
+ features &= ~NETIF_F_ALL_UFO;
+ }
+
if ((features & NETIF_F_TSO) && !(features & NETIF_F_HW_CSUM) &&
!(features & NETIF_F_IP_CSUM)) {
netdev_dbg(dev, "Dropping TSO features since no CSUM feature.\n");
@@ -5952,24 +5958,21 @@ static netdev_features_t netdev_fix_features(struct net_device *dev,
features &= ~NETIF_F_GSO;
}
- /* UFO needs SG and checksumming */
- if (features & NETIF_F_UFO) {
- /* maybe split UFO into V4 and V6? */
- if (!((features & NETIF_F_GEN_CSUM) ||
- (features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
- == (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
- netdev_dbg(dev,
- "Dropping NETIF_F_UFO since no checksum offload features.\n");
- features &= ~NETIF_F_UFO;
- }
-
- if (!(features & NETIF_F_SG)) {
- netdev_dbg(dev,
- "Dropping NETIF_F_UFO since no NETIF_F_SG feature.\n");
- features &= ~NETIF_F_UFO;
- }
+ /* UFO also needs checksumming */
+ if ((features & NETIF_F_UFO) && !(features & NETIF_F_GEN_CSUM) &&
+ !(features & NETIF_F_IP_CSUM)) {
+ netdev_dbg(dev,
+ "Dropping NETIF_F_UFO since no checksum offload features.\n");
+ features &= ~NETIF_F_UFO;
+ }
+ if ((features & NETIF_F_UFO6) && !(features & NETIF_F_GEN_CSUM) &&
+ !(features & NETIF_F_IPV6_CSUM)) {
+ netdev_dbg(dev,
+ "Dropping NETIF_F_UFO6 since no checksum offload features.\n");
+ features &= ~NETIF_F_UFO6;
}
+
#ifdef CONFIG_NET_RX_BUSY_POLL
if (dev->netdev_ops->ndo_busy_poll)
features |= NETIF_F_BUSY_POLL;
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 06dfb29..93eff41 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -223,7 +223,7 @@ static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
return NETIF_F_ALL_TSO;
case ETHTOOL_GUFO:
case ETHTOOL_SUFO:
- return NETIF_F_UFO;
+ return NETIF_F_ALL_UFO;
case ETHTOOL_GGSO:
case ETHTOOL_SGSO:
return NETIF_F_GSO;
--
1.9.3
--
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