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-rw-r--r--net/core/dev.c67
-rw-r--r--net/core/ethtool.c4
-rw-r--r--net/core/skbuff.c29
3 files changed, 93 insertions, 7 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 09fb1ace9dc8..556dd09af3b8 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2711,6 +2711,19 @@ struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
return ERR_PTR(err);
}
+ /* Only report GSO partial support if it will enable us to
+ * support segmentation on this frame without needing additional
+ * work.
+ */
+ if (features & NETIF_F_GSO_PARTIAL) {
+ netdev_features_t partial_features = NETIF_F_GSO_ROBUST;
+ struct net_device *dev = skb->dev;
+
+ partial_features |= dev->features & dev->gso_partial_features;
+ if (!skb_gso_ok(skb, features | partial_features))
+ features &= ~NETIF_F_GSO_PARTIAL;
+ }
+
BUILD_BUG_ON(SKB_SGO_CB_OFFSET +
sizeof(*SKB_GSO_CB(skb)) > sizeof(skb->cb));
@@ -2825,14 +2838,45 @@ static netdev_features_t dflt_features_check(const struct sk_buff *skb,
return vlan_features_check(skb, features);
}
+static netdev_features_t gso_features_check(const struct sk_buff *skb,
+ struct net_device *dev,
+ netdev_features_t features)
+{
+ u16 gso_segs = skb_shinfo(skb)->gso_segs;
+
+ if (gso_segs > dev->gso_max_segs)
+ return features & ~NETIF_F_GSO_MASK;
+
+ /* Support for GSO partial features requires software
+ * intervention before we can actually process the packets
+ * so we need to strip support for any partial features now
+ * and we can pull them back in after we have partially
+ * segmented the frame.
+ */
+ if (!(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL))
+ features &= ~dev->gso_partial_features;
+
+ /* Make sure to clear the IPv4 ID mangling feature if the
+ * IPv4 header has the potential to be fragmented.
+ */
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) {
+ struct iphdr *iph = skb->encapsulation ?
+ inner_ip_hdr(skb) : ip_hdr(skb);
+
+ if (!(iph->frag_off & htons(IP_DF)))
+ features &= ~NETIF_F_TSO_MANGLEID;
+ }
+
+ return features;
+}
+
netdev_features_t netif_skb_features(struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
netdev_features_t features = dev->features;
- u16 gso_segs = skb_shinfo(skb)->gso_segs;
- if (gso_segs > dev->gso_max_segs)
- features &= ~NETIF_F_GSO_MASK;
+ if (skb_is_gso(skb))
+ features = gso_features_check(skb, dev, features);
/* If encapsulation offload request, verify we are testing
* hardware encapsulation features instead of standard
@@ -4440,6 +4484,7 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff
NAPI_GRO_CB(skb)->free = 0;
NAPI_GRO_CB(skb)->encap_mark = 0;
NAPI_GRO_CB(skb)->is_fou = 0;
+ NAPI_GRO_CB(skb)->is_atomic = 1;
NAPI_GRO_CB(skb)->gro_remcsum_start = 0;
/* Setup for GRO checksum validation */
@@ -6706,6 +6751,14 @@ static netdev_features_t netdev_fix_features(struct net_device *dev,
}
}
+ /* GSO partial features require GSO partial be set */
+ if ((features & dev->gso_partial_features) &&
+ !(features & NETIF_F_GSO_PARTIAL)) {
+ netdev_dbg(dev,
+ "Dropping partially supported GSO features since no GSO partial.\n");
+ features &= ~dev->gso_partial_features;
+ }
+
#ifdef CONFIG_NET_RX_BUSY_POLL
if (dev->netdev_ops->ndo_busy_poll)
features |= NETIF_F_BUSY_POLL;
@@ -6976,9 +7029,11 @@ int register_netdevice(struct net_device *dev)
dev->features |= NETIF_F_SOFT_FEATURES;
dev->wanted_features = dev->features & dev->hw_features;
- if (!(dev->flags & IFF_LOOPBACK)) {
+ if (!(dev->flags & IFF_LOOPBACK))
dev->hw_features |= NETIF_F_NOCACHE_COPY;
- }
+
+ if (dev->hw_features & NETIF_F_TSO)
+ dev->hw_features |= NETIF_F_TSO_MANGLEID;
/* Make NETIF_F_HIGHDMA inheritable to VLAN devices.
*/
@@ -6986,7 +7041,7 @@ int register_netdevice(struct net_device *dev)
/* Make NETIF_F_SG inheritable to tunnel devices.
*/
- dev->hw_enc_features |= NETIF_F_SG;
+ dev->hw_enc_features |= NETIF_F_SG | NETIF_F_GSO_PARTIAL;
/* Make NETIF_F_SG inheritable to MPLS.
*/
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index f426c5ad6149..e0cf20a3b3dd 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -79,12 +79,16 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN]
[NETIF_F_UFO_BIT] = "tx-udp-fragmentation",
[NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
[NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
+ [NETIF_F_TSO_MANGLEID_BIT] = "tx-tcp-mangleid-segmentation",
[NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
[NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
[NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
+ [NETIF_F_GSO_GRE_CSUM_BIT] = "tx-gre-csum-segmentation",
[NETIF_F_GSO_IPIP_BIT] = "tx-ipip-segmentation",
[NETIF_F_GSO_SIT_BIT] = "tx-sit-segmentation",
[NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
+ [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
+ [NETIF_F_GSO_PARTIAL_BIT] = "tx-gso-partial",
[NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
[NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index d04c2d1c8c87..4cc594cdaada 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -3076,8 +3076,9 @@ struct sk_buff *skb_segment(struct sk_buff *head_skb,
struct sk_buff *frag_skb = head_skb;
unsigned int offset = doffset;
unsigned int tnl_hlen = skb_tnl_header_len(head_skb);
+ unsigned int partial_segs = 0;
unsigned int headroom;
- unsigned int len;
+ unsigned int len = head_skb->len;
__be16 proto;
bool csum;
int sg = !!(features & NETIF_F_SG);
@@ -3094,6 +3095,15 @@ struct sk_buff *skb_segment(struct sk_buff *head_skb,
csum = !!can_checksum_protocol(features, proto);
+ /* GSO partial only requires that we trim off any excess that
+ * doesn't fit into an MSS sized block, so take care of that
+ * now.
+ */
+ if (features & NETIF_F_GSO_PARTIAL) {
+ partial_segs = len / mss;
+ mss *= partial_segs;
+ }
+
headroom = skb_headroom(head_skb);
pos = skb_headlen(head_skb);
@@ -3281,6 +3291,23 @@ perform_csum_check:
*/
segs->prev = tail;
+ /* Update GSO info on first skb in partial sequence. */
+ if (partial_segs) {
+ int type = skb_shinfo(head_skb)->gso_type;
+
+ /* Update type to add partial and then remove dodgy if set */
+ type |= SKB_GSO_PARTIAL;
+ type &= ~SKB_GSO_DODGY;
+
+ /* Update GSO info and prepare to start updating headers on
+ * our way back down the stack of protocols.
+ */
+ skb_shinfo(segs)->gso_size = skb_shinfo(head_skb)->gso_size;
+ skb_shinfo(segs)->gso_segs = partial_segs;
+ skb_shinfo(segs)->gso_type = type;
+ SKB_GSO_CB(segs)->data_offset = skb_headroom(segs) + doffset;
+ }
+
/* Following permits correct backpressure, for protocols
* using skb_set_owner_w().
* Idea is to tranfert ownership from head_skb to last segment.
generated by cgit v1.2.3 (git 2.39.1) at 2025-06-05 16:31:51 +0000