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kernel: improve GRO performance
For packets not belonging to a local socket, use fraglist GRO instead of regular GRO. This make segmenting packets very cheap and avoids the need for selectively disabling GRO Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
parent
98834a4c3f
commit
b5c53848c3
@ -0,0 +1,24 @@
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From: Felix Fietkau <nbd@nbd.name>
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Date: Tue, 23 Apr 2024 12:35:21 +0200
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Subject: [PATCH] net: enable fraglist GRO by default
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This can significantly improve performance for packet forwarding/bridging
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/include/linux/netdev_features.h
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+++ b/include/linux/netdev_features.h
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@@ -242,10 +242,10 @@ static inline int find_next_netdev_featu
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#define NETIF_F_UPPER_DISABLES NETIF_F_LRO
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/* changeable features with no special hardware requirements */
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-#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
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+#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO | NETIF_F_GRO_FRAGLIST)
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/* Changeable features with no special hardware requirements that defaults to off. */
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-#define NETIF_F_SOFT_FEATURES_OFF (NETIF_F_GRO_FRAGLIST | NETIF_F_GRO_UDP_FWD)
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+#define NETIF_F_SOFT_FEATURES_OFF (NETIF_F_GRO_UDP_FWD)
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#define NETIF_F_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_FILTER | \
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NETIF_F_HW_VLAN_CTAG_RX | \
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@ -47,7 +47,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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const struct header_ops *header_ops;
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unsigned char operstate;
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@@ -2206,6 +2213,10 @@ struct net_device {
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@@ -2204,6 +2211,10 @@ struct net_device {
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struct mctp_dev __rcu *mctp_ptr;
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#endif
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@ -60,7 +60,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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*/
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--- a/include/linux/skbuff.h
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+++ b/include/linux/skbuff.h
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@@ -3046,6 +3046,10 @@ static inline int pskb_trim(struct sk_bu
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@@ -3045,6 +3045,10 @@ static inline int pskb_trim(struct sk_bu
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return (len < skb->len) ? __pskb_trim(skb, len) : 0;
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}
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@ -71,7 +71,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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/**
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* pskb_trim_unique - remove end from a paged unique (not cloned) buffer
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* @skb: buffer to alter
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@@ -3195,16 +3199,6 @@ static inline struct sk_buff *dev_alloc_
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@@ -3194,16 +3198,6 @@ static inline struct sk_buff *dev_alloc_
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}
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@ -152,7 +152,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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{
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--- a/net/ethernet/eth.c
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+++ b/net/ethernet/eth.c
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@@ -171,6 +171,12 @@ __be16 eth_type_trans(struct sk_buff *sk
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@@ -159,6 +159,12 @@ __be16 eth_type_trans(struct sk_buff *sk
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const struct ethhdr *eth;
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skb->dev = dev;
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@ -0,0 +1,24 @@
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From: Felix Fietkau <nbd@nbd.name>
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Date: Tue, 23 Apr 2024 12:35:21 +0200
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Subject: [PATCH] net: enable fraglist GRO by default
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This can significantly improve performance for packet forwarding/bridging
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/include/linux/netdev_features.h
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+++ b/include/linux/netdev_features.h
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@@ -242,10 +242,10 @@ static inline int find_next_netdev_featu
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#define NETIF_F_UPPER_DISABLES NETIF_F_LRO
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/* changeable features with no special hardware requirements */
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-#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
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+#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO | NETIF_F_GRO_FRAGLIST)
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/* Changeable features with no special hardware requirements that defaults to off. */
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-#define NETIF_F_SOFT_FEATURES_OFF (NETIF_F_GRO_FRAGLIST | NETIF_F_GRO_UDP_FWD)
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+#define NETIF_F_SOFT_FEATURES_OFF (NETIF_F_GRO_UDP_FWD)
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#define NETIF_F_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_FILTER | \
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NETIF_F_HW_VLAN_CTAG_RX | \
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@ -47,7 +47,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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const struct header_ops *header_ops;
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unsigned char operstate;
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@@ -2259,6 +2266,10 @@ struct net_device {
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@@ -2257,6 +2264,10 @@ struct net_device {
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struct mctp_dev __rcu *mctp_ptr;
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#endif
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@ -60,7 +60,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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*/
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--- a/include/linux/skbuff.h
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+++ b/include/linux/skbuff.h
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@@ -3081,6 +3081,10 @@ static inline int pskb_trim(struct sk_bu
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@@ -3080,6 +3080,10 @@ static inline int pskb_trim(struct sk_bu
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return (len < skb->len) ? __pskb_trim(skb, len) : 0;
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}
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@ -71,7 +71,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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/**
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* pskb_trim_unique - remove end from a paged unique (not cloned) buffer
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* @skb: buffer to alter
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@@ -3246,16 +3250,6 @@ static inline struct sk_buff *dev_alloc_
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@@ -3245,16 +3249,6 @@ static inline struct sk_buff *dev_alloc_
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}
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@ -152,7 +152,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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{
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--- a/net/ethernet/eth.c
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+++ b/net/ethernet/eth.c
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@@ -171,6 +171,12 @@ __be16 eth_type_trans(struct sk_buff *sk
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@@ -159,6 +159,12 @@ __be16 eth_type_trans(struct sk_buff *sk
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const struct ethhdr *eth;
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skb->dev = dev;
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@ -1,151 +0,0 @@
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From: Felix Fietkau <nbd@nbd.name>
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Subject: net: replace GRO optimization patch with a new one that supports VLANs/bridges with different MAC addresses
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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include/linux/netdevice.h | 2 ++
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include/linux/skbuff.h | 3 ++-
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net/core/dev.c | 48 +++++++++++++++++++++++++++++++++++++++++++++++
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net/ethernet/eth.c | 18 +++++++++++++++++-
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4 files changed, 69 insertions(+), 2 deletions(-)
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--- a/include/linux/netdevice.h
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+++ b/include/linux/netdevice.h
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@@ -2157,6 +2157,8 @@ struct net_device {
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struct netdev_hw_addr_list mc;
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struct netdev_hw_addr_list dev_addrs;
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+ unsigned char local_addr_mask[MAX_ADDR_LEN];
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+
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#ifdef CONFIG_SYSFS
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struct kset *queues_kset;
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#endif
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--- a/include/linux/skbuff.h
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+++ b/include/linux/skbuff.h
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@@ -967,6 +967,7 @@ struct sk_buff {
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#ifdef CONFIG_IPV6_NDISC_NODETYPE
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__u8 ndisc_nodetype:2;
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#endif
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+ __u8 gro_skip:1;
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__u8 ipvs_property:1;
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__u8 inner_protocol_type:1;
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--- a/net/core/gro.c
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+++ b/net/core/gro.c
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@@ -492,6 +492,9 @@ static enum gro_result dev_gro_receive(s
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int same_flow;
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int grow;
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+ if (skb->gro_skip)
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+ goto normal;
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+
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if (netif_elide_gro(skb->dev))
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goto normal;
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--- a/net/core/dev.c
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+++ b/net/core/dev.c
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@@ -7628,6 +7628,48 @@ static void __netdev_adjacent_dev_unlink
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&upper_dev->adj_list.lower);
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}
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+static void __netdev_addr_mask(unsigned char *mask, const unsigned char *addr,
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+ struct net_device *dev)
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+{
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+ int i;
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+
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+ for (i = 0; i < dev->addr_len; i++)
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+ mask[i] |= addr[i] ^ dev->dev_addr[i];
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+}
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+
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+static void __netdev_upper_mask(unsigned char *mask, struct net_device *dev,
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+ struct net_device *lower)
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+{
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+ struct net_device *cur;
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+ struct list_head *iter;
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+
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+ netdev_for_each_upper_dev_rcu(dev, cur, iter) {
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+ __netdev_addr_mask(mask, cur->dev_addr, lower);
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+ __netdev_upper_mask(mask, cur, lower);
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+ }
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+}
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+
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+static void __netdev_update_addr_mask(struct net_device *dev)
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+{
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+ unsigned char mask[MAX_ADDR_LEN];
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+ struct net_device *cur;
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+ struct list_head *iter;
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+
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+ memset(mask, 0, sizeof(mask));
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+ __netdev_upper_mask(mask, dev, dev);
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+ memcpy(dev->local_addr_mask, mask, dev->addr_len);
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+
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+ netdev_for_each_lower_dev(dev, cur, iter)
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+ __netdev_update_addr_mask(cur);
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+}
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+
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+static void netdev_update_addr_mask(struct net_device *dev)
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+{
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+ rcu_read_lock();
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+ __netdev_update_addr_mask(dev);
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+ rcu_read_unlock();
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+}
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+
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static int __netdev_upper_dev_link(struct net_device *dev,
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struct net_device *upper_dev, bool master,
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void *upper_priv, void *upper_info,
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@@ -7679,6 +7721,7 @@ static int __netdev_upper_dev_link(struc
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if (ret)
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return ret;
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+ netdev_update_addr_mask(dev);
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ret = call_netdevice_notifiers_info(NETDEV_CHANGEUPPER,
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&changeupper_info.info);
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ret = notifier_to_errno(ret);
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@@ -7775,6 +7818,7 @@ static void __netdev_upper_dev_unlink(st
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__netdev_adjacent_dev_unlink_neighbour(dev, upper_dev);
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+ netdev_update_addr_mask(dev);
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call_netdevice_notifiers_info(NETDEV_CHANGEUPPER,
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&changeupper_info.info);
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@@ -8827,6 +8871,7 @@ int dev_set_mac_address(struct net_devic
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if (err)
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return err;
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dev->addr_assign_type = NET_ADDR_SET;
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+ netdev_update_addr_mask(dev);
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call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
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add_device_randomness(dev->dev_addr, dev->addr_len);
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return 0;
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--- a/net/ethernet/eth.c
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+++ b/net/ethernet/eth.c
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@@ -143,6 +143,18 @@ u32 eth_get_headlen(const struct net_dev
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}
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EXPORT_SYMBOL(eth_get_headlen);
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+static inline bool
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+eth_check_local_mask(const void *addr1, const void *addr2, const void *mask)
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+{
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+ const u16 *a1 = addr1;
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+ const u16 *a2 = addr2;
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+ const u16 *m = mask;
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+
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+ return (((a1[0] ^ a2[0]) & ~m[0]) |
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+ ((a1[1] ^ a2[1]) & ~m[1]) |
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+ ((a1[2] ^ a2[2]) & ~m[2]));
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+}
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+
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/**
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* eth_type_trans - determine the packet's protocol ID.
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* @skb: received socket data
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@@ -174,6 +186,10 @@ __be16 eth_type_trans(struct sk_buff *sk
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} else {
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skb->pkt_type = PACKET_OTHERHOST;
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}
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+
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+ if (eth_check_local_mask(eth->h_dest, dev->dev_addr,
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+ dev->local_addr_mask))
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+ skb->gro_skip = 1;
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}
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/*
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@ -0,0 +1,559 @@
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From: Felix Fietkau <nbd@nbd.name>
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Date: Tue, 23 Apr 2024 11:23:03 +0200
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Subject: [PATCH] net: add TCP fraglist GRO support
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When forwarding TCP after GRO, software segmentation is very expensive,
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especially when the checksum needs to be recalculated.
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One case where that's currently unavoidable is when routing packets over
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PPPoE. Performance improves significantly when using fraglist GRO
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implemented in the same way as for UDP.
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Here's a measurement of running 2 TCP streams through a MediaTek MT7622
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device (2-core Cortex-A53), which runs NAT with flow offload enabled from
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one ethernet port to PPPoE on another ethernet port + cake qdisc set to
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1Gbps.
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rx-gro-list off: 630 Mbit/s, CPU 35% idle
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rx-gro-list on: 770 Mbit/s, CPU 40% idle
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Signe-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/include/net/gro.h
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+++ b/include/net/gro.h
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@@ -424,6 +424,7 @@ static inline __wsum ip6_gro_compute_pse
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}
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int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
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+int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb);
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/* Pass the currently batched GRO_NORMAL SKBs up to the stack. */
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static inline void gro_normal_list(struct napi_struct *napi)
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@@ -446,5 +447,48 @@ static inline void gro_normal_one(struct
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gro_normal_list(napi);
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}
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+/* This function is the alternative of 'inet_iif' and 'inet_sdif'
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+ * functions in case we can not rely on fields of IPCB.
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+ *
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+ * The caller must verify skb_valid_dst(skb) is false and skb->dev is initialized.
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+ * The caller must hold the RCU read lock.
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+ */
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+static inline void inet_get_iif_sdif(const struct sk_buff *skb, int *iif, int *sdif)
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+{
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+ *iif = inet_iif(skb) ?: skb->dev->ifindex;
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+ *sdif = 0;
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+
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+#if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
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+ if (netif_is_l3_slave(skb->dev)) {
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+ struct net_device *master = netdev_master_upper_dev_get_rcu(skb->dev);
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+
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+ *sdif = *iif;
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+ *iif = master ? master->ifindex : 0;
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+ }
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+#endif
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+}
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+
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+/* This function is the alternative of 'inet6_iif' and 'inet6_sdif'
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+ * functions in case we can not rely on fields of IP6CB.
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+ *
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+ * The caller must verify skb_valid_dst(skb) is false and skb->dev is initialized.
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+ * The caller must hold the RCU read lock.
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+ */
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+static inline void inet6_get_iif_sdif(const struct sk_buff *skb, int *iif, int *sdif)
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+{
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+ /* using skb->dev->ifindex because skb_dst(skb) is not initialized */
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+ *iif = skb->dev->ifindex;
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+ *sdif = 0;
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+
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+#if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
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+ if (netif_is_l3_slave(skb->dev)) {
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+ struct net_device *master = netdev_master_upper_dev_get_rcu(skb->dev);
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+
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+ *sdif = *iif;
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+ *iif = master ? master->ifindex : 0;
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+ }
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+#endif
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+}
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+
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#endif /* _NET_IPV6_GRO_H */
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--- a/include/net/tcp.h
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+++ b/include/net/tcp.h
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@@ -2057,7 +2057,10 @@ void tcp_v4_destroy_sock(struct sock *sk
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struct sk_buff *tcp_gso_segment(struct sk_buff *skb,
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netdev_features_t features);
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-struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb);
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+struct tcphdr *tcp_gro_pull_header(struct sk_buff *skb);
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+struct sk_buff *tcp_gro_lookup(struct list_head *head, struct tcphdr *th);
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+struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb,
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+ struct tcphdr *th);
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INDIRECT_CALLABLE_DECLARE(int tcp4_gro_complete(struct sk_buff *skb, int thoff));
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INDIRECT_CALLABLE_DECLARE(struct sk_buff *tcp4_gro_receive(struct list_head *head, struct sk_buff *skb));
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INDIRECT_CALLABLE_DECLARE(int tcp6_gro_complete(struct sk_buff *skb, int thoff));
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--- a/net/core/gro.c
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+++ b/net/core/gro.c
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@@ -290,6 +290,33 @@ done:
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return 0;
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}
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+int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb)
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+{
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+ if (unlikely(p->len + skb->len >= 65536))
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+ return -E2BIG;
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+
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+ if (NAPI_GRO_CB(p)->last == p)
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+ skb_shinfo(p)->frag_list = skb;
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+ else
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+ NAPI_GRO_CB(p)->last->next = skb;
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+
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+ skb_pull(skb, skb_gro_offset(skb));
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+
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+ NAPI_GRO_CB(p)->last = skb;
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+ NAPI_GRO_CB(p)->count++;
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+ p->data_len += skb->len;
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+
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+ /* sk ownership - if any - completely transferred to the aggregated packet */
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+ skb->destructor = NULL;
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+ skb->sk = NULL;
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+ p->truesize += skb->truesize;
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+ p->len += skb->len;
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+
|
||||
+ NAPI_GRO_CB(skb)->same_flow = 1;
|
||||
+
|
||||
+ return 0;
|
||||
+}
|
||||
+
|
||||
|
||||
static void napi_gro_complete(struct napi_struct *napi, struct sk_buff *skb)
|
||||
{
|
||||
--- a/net/ipv4/tcp_offload.c
|
||||
+++ b/net/ipv4/tcp_offload.c
|
||||
@@ -27,6 +27,68 @@ static void tcp_gso_tstamp(struct sk_buf
|
||||
}
|
||||
}
|
||||
|
||||
+static void __tcpv4_gso_segment_csum(struct sk_buff *seg,
|
||||
+ __be32 *oldip, __be32 *newip,
|
||||
+ __be16 *oldport, __be16 *newport)
|
||||
+{
|
||||
+ struct tcphdr *th;
|
||||
+ struct iphdr *iph;
|
||||
+
|
||||
+ if (*oldip == *newip && *oldport == *newport)
|
||||
+ return;
|
||||
+
|
||||
+ th = tcp_hdr(seg);
|
||||
+ iph = ip_hdr(seg);
|
||||
+
|
||||
+ inet_proto_csum_replace4(&th->check, seg, *oldip, *newip, true);
|
||||
+ inet_proto_csum_replace2(&th->check, seg, *oldport, *newport, false);
|
||||
+ *oldport = *newport;
|
||||
+
|
||||
+ csum_replace4(&iph->check, *oldip, *newip);
|
||||
+ *oldip = *newip;
|
||||
+}
|
||||
+
|
||||
+static struct sk_buff *__tcpv4_gso_segment_list_csum(struct sk_buff *segs)
|
||||
+{
|
||||
+ struct sk_buff *seg;
|
||||
+ struct tcphdr *th, *th2;
|
||||
+ struct iphdr *iph, *iph2;
|
||||
+
|
||||
+ seg = segs;
|
||||
+ th = tcp_hdr(seg);
|
||||
+ iph = ip_hdr(seg);
|
||||
+ th2 = tcp_hdr(seg->next);
|
||||
+ iph2 = ip_hdr(seg->next);
|
||||
+
|
||||
+ if (!(*(u32 *)&th->source ^ *(u32 *)&th2->source) &&
|
||||
+ iph->daddr == iph2->daddr && iph->saddr == iph2->saddr)
|
||||
+ return segs;
|
||||
+
|
||||
+ while ((seg = seg->next)) {
|
||||
+ th2 = tcp_hdr(seg);
|
||||
+ iph2 = ip_hdr(seg);
|
||||
+
|
||||
+ __tcpv4_gso_segment_csum(seg,
|
||||
+ &iph2->saddr, &iph->saddr,
|
||||
+ &th2->source, &th->source);
|
||||
+ __tcpv4_gso_segment_csum(seg,
|
||||
+ &iph2->daddr, &iph->daddr,
|
||||
+ &th2->dest, &th->dest);
|
||||
+ }
|
||||
+
|
||||
+ return segs;
|
||||
+}
|
||||
+
|
||||
+static struct sk_buff *__tcp4_gso_segment_list(struct sk_buff *skb,
|
||||
+ netdev_features_t features)
|
||||
+{
|
||||
+ skb = skb_segment_list(skb, features, skb_mac_header_len(skb));
|
||||
+ if (IS_ERR(skb))
|
||||
+ return skb;
|
||||
+
|
||||
+ return __tcpv4_gso_segment_list_csum(skb);
|
||||
+}
|
||||
+
|
||||
static struct sk_buff *tcp4_gso_segment(struct sk_buff *skb,
|
||||
netdev_features_t features)
|
||||
{
|
||||
@@ -36,6 +98,9 @@ static struct sk_buff *tcp4_gso_segment(
|
||||
if (!pskb_may_pull(skb, sizeof(struct tcphdr)))
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_FRAGLIST)
|
||||
+ return __tcp4_gso_segment_list(skb, features);
|
||||
+
|
||||
if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
|
||||
const struct iphdr *iph = ip_hdr(skb);
|
||||
struct tcphdr *th = tcp_hdr(skb);
|
||||
@@ -177,61 +242,76 @@ out:
|
||||
return segs;
|
||||
}
|
||||
|
||||
-struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb)
|
||||
+struct sk_buff *tcp_gro_lookup(struct list_head *head, struct tcphdr *th)
|
||||
{
|
||||
- struct sk_buff *pp = NULL;
|
||||
+ struct tcphdr *th2;
|
||||
struct sk_buff *p;
|
||||
+
|
||||
+ list_for_each_entry(p, head, list) {
|
||||
+ if (!NAPI_GRO_CB(p)->same_flow)
|
||||
+ continue;
|
||||
+
|
||||
+ th2 = tcp_hdr(p);
|
||||
+ if (*(u32 *)&th->source ^ *(u32 *)&th2->source) {
|
||||
+ NAPI_GRO_CB(p)->same_flow = 0;
|
||||
+ continue;
|
||||
+ }
|
||||
+
|
||||
+ return p;
|
||||
+ }
|
||||
+
|
||||
+ return NULL;
|
||||
+}
|
||||
+
|
||||
+struct tcphdr *tcp_gro_pull_header(struct sk_buff *skb)
|
||||
+{
|
||||
+ unsigned int thlen, hlen, off;
|
||||
struct tcphdr *th;
|
||||
- struct tcphdr *th2;
|
||||
- unsigned int len;
|
||||
- unsigned int thlen;
|
||||
- __be32 flags;
|
||||
- unsigned int mss = 1;
|
||||
- unsigned int hlen;
|
||||
- unsigned int off;
|
||||
- int flush = 1;
|
||||
- int i;
|
||||
|
||||
off = skb_gro_offset(skb);
|
||||
hlen = off + sizeof(*th);
|
||||
th = skb_gro_header(skb, hlen, off);
|
||||
if (unlikely(!th))
|
||||
- goto out;
|
||||
+ return NULL;
|
||||
|
||||
thlen = th->doff * 4;
|
||||
if (thlen < sizeof(*th))
|
||||
- goto out;
|
||||
+ return NULL;
|
||||
|
||||
hlen = off + thlen;
|
||||
if (skb_gro_header_hard(skb, hlen)) {
|
||||
th = skb_gro_header_slow(skb, hlen, off);
|
||||
if (unlikely(!th))
|
||||
- goto out;
|
||||
+ return NULL;
|
||||
}
|
||||
|
||||
skb_gro_pull(skb, thlen);
|
||||
|
||||
- len = skb_gro_len(skb);
|
||||
- flags = tcp_flag_word(th);
|
||||
-
|
||||
- list_for_each_entry(p, head, list) {
|
||||
- if (!NAPI_GRO_CB(p)->same_flow)
|
||||
- continue;
|
||||
+ return th;
|
||||
+}
|
||||
|
||||
- th2 = tcp_hdr(p);
|
||||
+struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb,
|
||||
+ struct tcphdr *th)
|
||||
+{
|
||||
+ unsigned int thlen = th->doff * 4;
|
||||
+ struct sk_buff *pp = NULL;
|
||||
+ struct sk_buff *p;
|
||||
+ struct tcphdr *th2;
|
||||
+ unsigned int len;
|
||||
+ __be32 flags;
|
||||
+ unsigned int mss = 1;
|
||||
+ int flush = 1;
|
||||
+ int i;
|
||||
|
||||
- if (*(u32 *)&th->source ^ *(u32 *)&th2->source) {
|
||||
- NAPI_GRO_CB(p)->same_flow = 0;
|
||||
- continue;
|
||||
- }
|
||||
+ len = skb_gro_len(skb);
|
||||
+ flags = tcp_flag_word(th);
|
||||
|
||||
- goto found;
|
||||
- }
|
||||
- p = NULL;
|
||||
- goto out_check_final;
|
||||
+ p = tcp_gro_lookup(head, th);
|
||||
+ if (!p)
|
||||
+ goto out_check_final;
|
||||
|
||||
-found:
|
||||
/* Include the IP ID check below from the inner most IP hdr */
|
||||
+ th2 = tcp_hdr(p);
|
||||
flush = NAPI_GRO_CB(p)->flush;
|
||||
flush |= (__force int)(flags & TCP_FLAG_CWR);
|
||||
flush |= (__force int)((flags ^ tcp_flag_word(th2)) &
|
||||
@@ -268,6 +348,19 @@ found:
|
||||
flush |= p->decrypted ^ skb->decrypted;
|
||||
#endif
|
||||
|
||||
+ if (NAPI_GRO_CB(p)->is_flist) {
|
||||
+ flush |= (__force int)(flags ^ tcp_flag_word(th2));
|
||||
+ flush |= skb->ip_summed != p->ip_summed;
|
||||
+ flush |= skb->csum_level != p->csum_level;
|
||||
+ flush |= !pskb_may_pull(skb, skb_gro_offset(skb));
|
||||
+ flush |= NAPI_GRO_CB(p)->count >= 64;
|
||||
+
|
||||
+ if (flush || skb_gro_receive_list(p, skb))
|
||||
+ mss = 1;
|
||||
+
|
||||
+ goto out_check_final;
|
||||
+ }
|
||||
+
|
||||
if (flush || skb_gro_receive(p, skb)) {
|
||||
mss = 1;
|
||||
goto out_check_final;
|
||||
@@ -289,7 +382,6 @@ out_check_final:
|
||||
if (p && (!NAPI_GRO_CB(skb)->same_flow || flush))
|
||||
pp = p;
|
||||
|
||||
-out:
|
||||
NAPI_GRO_CB(skb)->flush |= (flush != 0);
|
||||
|
||||
return pp;
|
||||
@@ -315,18 +407,56 @@ int tcp_gro_complete(struct sk_buff *skb
|
||||
}
|
||||
EXPORT_SYMBOL(tcp_gro_complete);
|
||||
|
||||
+static void tcp4_check_fraglist_gro(struct list_head *head, struct sk_buff *skb,
|
||||
+ struct tcphdr *th)
|
||||
+{
|
||||
+ const struct iphdr *iph = skb_gro_network_header(skb);
|
||||
+ struct net *net = dev_net(skb->dev);
|
||||
+ struct sk_buff *p;
|
||||
+ struct sock *sk;
|
||||
+ int iif, sdif;
|
||||
+
|
||||
+ if (!(skb->dev->features & NETIF_F_GRO_FRAGLIST))
|
||||
+ return;
|
||||
+
|
||||
+ p = tcp_gro_lookup(head, th);
|
||||
+ if (p) {
|
||||
+ NAPI_GRO_CB(skb)->is_flist = NAPI_GRO_CB(p)->is_flist;
|
||||
+ return;
|
||||
+ }
|
||||
+
|
||||
+ inet_get_iif_sdif(skb, &iif, &sdif);
|
||||
+ sk = __inet_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
|
||||
+ iph->saddr, th->source,
|
||||
+ iph->daddr, ntohs(th->dest),
|
||||
+ iif, sdif);
|
||||
+ NAPI_GRO_CB(skb)->is_flist = !sk;
|
||||
+ if (sk)
|
||||
+ sock_put(sk);
|
||||
+}
|
||||
+
|
||||
INDIRECT_CALLABLE_SCOPE
|
||||
struct sk_buff *tcp4_gro_receive(struct list_head *head, struct sk_buff *skb)
|
||||
{
|
||||
+ struct tcphdr *th;
|
||||
+
|
||||
/* Don't bother verifying checksum if we're going to flush anyway. */
|
||||
if (!NAPI_GRO_CB(skb)->flush &&
|
||||
skb_gro_checksum_validate(skb, IPPROTO_TCP,
|
||||
- inet_gro_compute_pseudo)) {
|
||||
- NAPI_GRO_CB(skb)->flush = 1;
|
||||
- return NULL;
|
||||
- }
|
||||
+ inet_gro_compute_pseudo))
|
||||
+ goto flush;
|
||||
+
|
||||
+ th = tcp_gro_pull_header(skb);
|
||||
+ if (!th)
|
||||
+ goto flush;
|
||||
|
||||
- return tcp_gro_receive(head, skb);
|
||||
+ tcp4_check_fraglist_gro(head, skb, th);
|
||||
+
|
||||
+ return tcp_gro_receive(head, skb, th);
|
||||
+
|
||||
+flush:
|
||||
+ NAPI_GRO_CB(skb)->flush = 1;
|
||||
+ return NULL;
|
||||
}
|
||||
|
||||
INDIRECT_CALLABLE_SCOPE int tcp4_gro_complete(struct sk_buff *skb, int thoff)
|
||||
@@ -334,6 +464,15 @@ INDIRECT_CALLABLE_SCOPE int tcp4_gro_com
|
||||
const struct iphdr *iph = ip_hdr(skb);
|
||||
struct tcphdr *th = tcp_hdr(skb);
|
||||
|
||||
+ if (NAPI_GRO_CB(skb)->is_flist) {
|
||||
+ skb_shinfo(skb)->gso_type |= SKB_GSO_FRAGLIST | SKB_GSO_TCPV4;
|
||||
+ skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
|
||||
+
|
||||
+ __skb_incr_checksum_unnecessary(skb);
|
||||
+
|
||||
+ return 0;
|
||||
+ }
|
||||
+
|
||||
th->check = ~tcp_v4_check(skb->len - thoff, iph->saddr,
|
||||
iph->daddr, 0);
|
||||
skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV4;
|
||||
--- a/net/ipv4/udp_offload.c
|
||||
+++ b/net/ipv4/udp_offload.c
|
||||
@@ -425,33 +425,6 @@ out:
|
||||
return segs;
|
||||
}
|
||||
|
||||
-static int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb)
|
||||
-{
|
||||
- if (unlikely(p->len + skb->len >= 65536))
|
||||
- return -E2BIG;
|
||||
-
|
||||
- if (NAPI_GRO_CB(p)->last == p)
|
||||
- skb_shinfo(p)->frag_list = skb;
|
||||
- else
|
||||
- NAPI_GRO_CB(p)->last->next = skb;
|
||||
-
|
||||
- skb_pull(skb, skb_gro_offset(skb));
|
||||
-
|
||||
- NAPI_GRO_CB(p)->last = skb;
|
||||
- NAPI_GRO_CB(p)->count++;
|
||||
- p->data_len += skb->len;
|
||||
-
|
||||
- /* sk ownership - if any - completely transferred to the aggregated packet */
|
||||
- skb->destructor = NULL;
|
||||
- skb->sk = NULL;
|
||||
- p->truesize += skb->truesize;
|
||||
- p->len += skb->len;
|
||||
-
|
||||
- NAPI_GRO_CB(skb)->same_flow = 1;
|
||||
-
|
||||
- return 0;
|
||||
-}
|
||||
-
|
||||
|
||||
#define UDP_GRO_CNT_MAX 64
|
||||
static struct sk_buff *udp_gro_receive_segment(struct list_head *head,
|
||||
--- a/net/ipv6/tcpv6_offload.c
|
||||
+++ b/net/ipv6/tcpv6_offload.c
|
||||
@@ -7,24 +7,65 @@
|
||||
*/
|
||||
#include <linux/indirect_call_wrapper.h>
|
||||
#include <linux/skbuff.h>
|
||||
+#include <net/inet6_hashtables.h>
|
||||
#include <net/gro.h>
|
||||
#include <net/protocol.h>
|
||||
#include <net/tcp.h>
|
||||
#include <net/ip6_checksum.h>
|
||||
#include "ip6_offload.h"
|
||||
|
||||
+static void tcp6_check_fraglist_gro(struct list_head *head, struct sk_buff *skb,
|
||||
+ struct tcphdr *th)
|
||||
+{
|
||||
+#if IS_ENABLED(CONFIG_IPV6)
|
||||
+ const struct ipv6hdr *hdr = skb_gro_network_header(skb);
|
||||
+ struct net *net = dev_net(skb->dev);
|
||||
+ struct sk_buff *p;
|
||||
+ struct sock *sk;
|
||||
+ int iif, sdif;
|
||||
+
|
||||
+ if (!(skb->dev->features & NETIF_F_GRO_FRAGLIST))
|
||||
+ return;
|
||||
+
|
||||
+ p = tcp_gro_lookup(head, th);
|
||||
+ if (p) {
|
||||
+ NAPI_GRO_CB(skb)->is_flist = NAPI_GRO_CB(p)->is_flist;
|
||||
+ return;
|
||||
+ }
|
||||
+
|
||||
+ inet6_get_iif_sdif(skb, &iif, &sdif);
|
||||
+ sk = __inet6_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
|
||||
+ &hdr->saddr, th->source,
|
||||
+ &hdr->daddr, ntohs(th->dest),
|
||||
+ iif, sdif);
|
||||
+ NAPI_GRO_CB(skb)->is_flist = !sk;
|
||||
+ if (sk)
|
||||
+ sock_put(sk);
|
||||
+#endif /* IS_ENABLED(CONFIG_IPV6) */
|
||||
+}
|
||||
+
|
||||
INDIRECT_CALLABLE_SCOPE
|
||||
struct sk_buff *tcp6_gro_receive(struct list_head *head, struct sk_buff *skb)
|
||||
{
|
||||
+ struct tcphdr *th;
|
||||
+
|
||||
/* Don't bother verifying checksum if we're going to flush anyway. */
|
||||
if (!NAPI_GRO_CB(skb)->flush &&
|
||||
skb_gro_checksum_validate(skb, IPPROTO_TCP,
|
||||
- ip6_gro_compute_pseudo)) {
|
||||
- NAPI_GRO_CB(skb)->flush = 1;
|
||||
- return NULL;
|
||||
- }
|
||||
+ ip6_gro_compute_pseudo))
|
||||
+ goto flush;
|
||||
|
||||
- return tcp_gro_receive(head, skb);
|
||||
+ th = tcp_gro_pull_header(skb);
|
||||
+ if (!th)
|
||||
+ goto flush;
|
||||
+
|
||||
+ tcp6_check_fraglist_gro(head, skb, th);
|
||||
+
|
||||
+ return tcp_gro_receive(head, skb, th);
|
||||
+
|
||||
+flush:
|
||||
+ NAPI_GRO_CB(skb)->flush = 1;
|
||||
+ return NULL;
|
||||
}
|
||||
|
||||
INDIRECT_CALLABLE_SCOPE int tcp6_gro_complete(struct sk_buff *skb, int thoff)
|
||||
@@ -32,6 +73,15 @@ INDIRECT_CALLABLE_SCOPE int tcp6_gro_com
|
||||
const struct ipv6hdr *iph = ipv6_hdr(skb);
|
||||
struct tcphdr *th = tcp_hdr(skb);
|
||||
|
||||
+ if (NAPI_GRO_CB(skb)->is_flist) {
|
||||
+ skb_shinfo(skb)->gso_type |= SKB_GSO_FRAGLIST | SKB_GSO_TCPV6;
|
||||
+ skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
|
||||
+
|
||||
+ __skb_incr_checksum_unnecessary(skb);
|
||||
+
|
||||
+ return 0;
|
||||
+ }
|
||||
+
|
||||
th->check = ~tcp_v6_check(skb->len - thoff, &iph->saddr,
|
||||
&iph->daddr, 0);
|
||||
skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV6;
|
||||
@@ -50,6 +100,9 @@ static struct sk_buff *tcp6_gso_segment(
|
||||
if (!pskb_may_pull(skb, sizeof(*th)))
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_FRAGLIST)
|
||||
+ return skb_segment_list(skb, features, skb_mac_header_len(skb));
|
||||
+
|
||||
if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
|
||||
const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
|
||||
struct tcphdr *th = tcp_hdr(skb);
|
||||
@ -17,7 +17,7 @@ Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
|
||||
|
||||
--- a/include/linux/netdevice.h
|
||||
+++ b/include/linux/netdevice.h
|
||||
@@ -2192,7 +2192,7 @@ struct net_device {
|
||||
@@ -2190,7 +2190,7 @@ struct net_device {
|
||||
#if IS_ENABLED(CONFIG_AX25)
|
||||
void *ax25_ptr;
|
||||
#endif
|
||||
|
||||
@ -20,7 +20,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
|
||||
/**
|
||||
* napi_disable - prevent NAPI from scheduling
|
||||
@@ -3152,6 +3153,7 @@ struct softnet_data {
|
||||
@@ -3150,6 +3151,7 @@ struct softnet_data {
|
||||
unsigned int processed;
|
||||
unsigned int time_squeeze;
|
||||
unsigned int received_rps;
|
||||
@ -157,7 +157,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
void netif_napi_add_weight(struct net_device *dev, struct napi_struct *napi,
|
||||
int (*poll)(struct napi_struct *, int), int weight)
|
||||
{
|
||||
@@ -11171,6 +11242,9 @@ static int dev_cpu_dead(unsigned int old
|
||||
@@ -11126,6 +11197,9 @@ static int dev_cpu_dead(unsigned int old
|
||||
raise_softirq_irqoff(NET_TX_SOFTIRQ);
|
||||
local_irq_enable();
|
||||
|
||||
@ -167,7 +167,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
#ifdef CONFIG_RPS
|
||||
remsd = oldsd->rps_ipi_list;
|
||||
oldsd->rps_ipi_list = NULL;
|
||||
@@ -11483,6 +11557,7 @@ static int __init net_dev_init(void)
|
||||
@@ -11438,6 +11512,7 @@ static int __init net_dev_init(void)
|
||||
INIT_CSD(&sd->defer_csd, trigger_rx_softirq, sd);
|
||||
spin_lock_init(&sd->defer_lock);
|
||||
|
||||
|
||||
@ -1,151 +0,0 @@
|
||||
From: Felix Fietkau <nbd@nbd.name>
|
||||
Subject: net: replace GRO optimization patch with a new one that supports VLANs/bridges with different MAC addresses
|
||||
|
||||
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
---
|
||||
include/linux/netdevice.h | 2 ++
|
||||
include/linux/skbuff.h | 3 ++-
|
||||
net/core/dev.c | 48 +++++++++++++++++++++++++++++++++++++++++++++++
|
||||
net/ethernet/eth.c | 18 +++++++++++++++++-
|
||||
4 files changed, 69 insertions(+), 2 deletions(-)
|
||||
|
||||
--- a/include/linux/netdevice.h
|
||||
+++ b/include/linux/netdevice.h
|
||||
@@ -2210,6 +2210,8 @@ struct net_device {
|
||||
struct netdev_hw_addr_list mc;
|
||||
struct netdev_hw_addr_list dev_addrs;
|
||||
|
||||
+ unsigned char local_addr_mask[MAX_ADDR_LEN];
|
||||
+
|
||||
#ifdef CONFIG_SYSFS
|
||||
struct kset *queues_kset;
|
||||
#endif
|
||||
--- a/include/linux/skbuff.h
|
||||
+++ b/include/linux/skbuff.h
|
||||
@@ -959,6 +959,7 @@ struct sk_buff {
|
||||
#ifdef CONFIG_IPV6_NDISC_NODETYPE
|
||||
__u8 ndisc_nodetype:2;
|
||||
#endif
|
||||
+ __u8 gro_skip:1;
|
||||
|
||||
#if IS_ENABLED(CONFIG_IP_VS)
|
||||
__u8 ipvs_property:1;
|
||||
--- a/net/core/gro.c
|
||||
+++ b/net/core/gro.c
|
||||
@@ -446,6 +446,9 @@ static enum gro_result dev_gro_receive(s
|
||||
enum gro_result ret;
|
||||
int same_flow;
|
||||
|
||||
+ if (skb->gro_skip)
|
||||
+ goto normal;
|
||||
+
|
||||
if (netif_elide_gro(skb->dev))
|
||||
goto normal;
|
||||
|
||||
--- a/net/core/dev.c
|
||||
+++ b/net/core/dev.c
|
||||
@@ -7689,6 +7689,48 @@ static void __netdev_adjacent_dev_unlink
|
||||
&upper_dev->adj_list.lower);
|
||||
}
|
||||
|
||||
+static void __netdev_addr_mask(unsigned char *mask, const unsigned char *addr,
|
||||
+ struct net_device *dev)
|
||||
+{
|
||||
+ int i;
|
||||
+
|
||||
+ for (i = 0; i < dev->addr_len; i++)
|
||||
+ mask[i] |= addr[i] ^ dev->dev_addr[i];
|
||||
+}
|
||||
+
|
||||
+static void __netdev_upper_mask(unsigned char *mask, struct net_device *dev,
|
||||
+ struct net_device *lower)
|
||||
+{
|
||||
+ struct net_device *cur;
|
||||
+ struct list_head *iter;
|
||||
+
|
||||
+ netdev_for_each_upper_dev_rcu(dev, cur, iter) {
|
||||
+ __netdev_addr_mask(mask, cur->dev_addr, lower);
|
||||
+ __netdev_upper_mask(mask, cur, lower);
|
||||
+ }
|
||||
+}
|
||||
+
|
||||
+static void __netdev_update_addr_mask(struct net_device *dev)
|
||||
+{
|
||||
+ unsigned char mask[MAX_ADDR_LEN];
|
||||
+ struct net_device *cur;
|
||||
+ struct list_head *iter;
|
||||
+
|
||||
+ memset(mask, 0, sizeof(mask));
|
||||
+ __netdev_upper_mask(mask, dev, dev);
|
||||
+ memcpy(dev->local_addr_mask, mask, dev->addr_len);
|
||||
+
|
||||
+ netdev_for_each_lower_dev(dev, cur, iter)
|
||||
+ __netdev_update_addr_mask(cur);
|
||||
+}
|
||||
+
|
||||
+static void netdev_update_addr_mask(struct net_device *dev)
|
||||
+{
|
||||
+ rcu_read_lock();
|
||||
+ __netdev_update_addr_mask(dev);
|
||||
+ rcu_read_unlock();
|
||||
+}
|
||||
+
|
||||
static int __netdev_upper_dev_link(struct net_device *dev,
|
||||
struct net_device *upper_dev, bool master,
|
||||
void *upper_priv, void *upper_info,
|
||||
@@ -7740,6 +7782,7 @@ static int __netdev_upper_dev_link(struc
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
+ netdev_update_addr_mask(dev);
|
||||
ret = call_netdevice_notifiers_info(NETDEV_CHANGEUPPER,
|
||||
&changeupper_info.info);
|
||||
ret = notifier_to_errno(ret);
|
||||
@@ -7836,6 +7879,7 @@ static void __netdev_upper_dev_unlink(st
|
||||
|
||||
__netdev_adjacent_dev_unlink_neighbour(dev, upper_dev);
|
||||
|
||||
+ netdev_update_addr_mask(dev);
|
||||
call_netdevice_notifiers_info(NETDEV_CHANGEUPPER,
|
||||
&changeupper_info.info);
|
||||
|
||||
@@ -8892,6 +8936,7 @@ int dev_set_mac_address(struct net_devic
|
||||
return err;
|
||||
}
|
||||
dev->addr_assign_type = NET_ADDR_SET;
|
||||
+ netdev_update_addr_mask(dev);
|
||||
call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
|
||||
add_device_randomness(dev->dev_addr, dev->addr_len);
|
||||
return 0;
|
||||
--- a/net/ethernet/eth.c
|
||||
+++ b/net/ethernet/eth.c
|
||||
@@ -143,6 +143,18 @@ u32 eth_get_headlen(const struct net_dev
|
||||
}
|
||||
EXPORT_SYMBOL(eth_get_headlen);
|
||||
|
||||
+static inline bool
|
||||
+eth_check_local_mask(const void *addr1, const void *addr2, const void *mask)
|
||||
+{
|
||||
+ const u16 *a1 = addr1;
|
||||
+ const u16 *a2 = addr2;
|
||||
+ const u16 *m = mask;
|
||||
+
|
||||
+ return (((a1[0] ^ a2[0]) & ~m[0]) |
|
||||
+ ((a1[1] ^ a2[1]) & ~m[1]) |
|
||||
+ ((a1[2] ^ a2[2]) & ~m[2]));
|
||||
+}
|
||||
+
|
||||
/**
|
||||
* eth_type_trans - determine the packet's protocol ID.
|
||||
* @skb: received socket data
|
||||
@@ -174,6 +186,10 @@ __be16 eth_type_trans(struct sk_buff *sk
|
||||
} else {
|
||||
skb->pkt_type = PACKET_OTHERHOST;
|
||||
}
|
||||
+
|
||||
+ if (eth_check_local_mask(eth->h_dest, dev->dev_addr,
|
||||
+ dev->local_addr_mask))
|
||||
+ skb->gro_skip = 1;
|
||||
}
|
||||
|
||||
/*
|
||||
@ -0,0 +1,510 @@
|
||||
From: Felix Fietkau <nbd@nbd.name>
|
||||
Date: Tue, 23 Apr 2024 11:23:03 +0200
|
||||
Subject: [PATCH] net: add TCP fraglist GRO support
|
||||
|
||||
When forwarding TCP after GRO, software segmentation is very expensive,
|
||||
especially when the checksum needs to be recalculated.
|
||||
One case where that's currently unavoidable is when routing packets over
|
||||
PPPoE. Performance improves significantly when using fraglist GRO
|
||||
implemented in the same way as for UDP.
|
||||
|
||||
Here's a measurement of running 2 TCP streams through a MediaTek MT7622
|
||||
device (2-core Cortex-A53), which runs NAT with flow offload enabled from
|
||||
one ethernet port to PPPoE on another ethernet port + cake qdisc set to
|
||||
1Gbps.
|
||||
|
||||
rx-gro-list off: 630 Mbit/s, CPU 35% idle
|
||||
rx-gro-list on: 770 Mbit/s, CPU 40% idle
|
||||
|
||||
Signe-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
---
|
||||
|
||||
--- a/include/net/gro.h
|
||||
+++ b/include/net/gro.h
|
||||
@@ -430,6 +430,7 @@ static inline __wsum ip6_gro_compute_pse
|
||||
}
|
||||
|
||||
int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
|
||||
+int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb);
|
||||
|
||||
/* Pass the currently batched GRO_NORMAL SKBs up to the stack. */
|
||||
static inline void gro_normal_list(struct napi_struct *napi)
|
||||
--- a/include/net/tcp.h
|
||||
+++ b/include/net/tcp.h
|
||||
@@ -2082,7 +2082,10 @@ void tcp_v4_destroy_sock(struct sock *sk
|
||||
|
||||
struct sk_buff *tcp_gso_segment(struct sk_buff *skb,
|
||||
netdev_features_t features);
|
||||
-struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb);
|
||||
+struct tcphdr *tcp_gro_pull_header(struct sk_buff *skb);
|
||||
+struct sk_buff *tcp_gro_lookup(struct list_head *head, struct tcphdr *th);
|
||||
+struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb,
|
||||
+ struct tcphdr *th);
|
||||
INDIRECT_CALLABLE_DECLARE(int tcp4_gro_complete(struct sk_buff *skb, int thoff));
|
||||
INDIRECT_CALLABLE_DECLARE(struct sk_buff *tcp4_gro_receive(struct list_head *head, struct sk_buff *skb));
|
||||
INDIRECT_CALLABLE_DECLARE(int tcp6_gro_complete(struct sk_buff *skb, int thoff));
|
||||
--- a/net/core/gro.c
|
||||
+++ b/net/core/gro.c
|
||||
@@ -233,6 +233,33 @@ done:
|
||||
return 0;
|
||||
}
|
||||
|
||||
+int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb)
|
||||
+{
|
||||
+ if (unlikely(p->len + skb->len >= 65536))
|
||||
+ return -E2BIG;
|
||||
+
|
||||
+ if (NAPI_GRO_CB(p)->last == p)
|
||||
+ skb_shinfo(p)->frag_list = skb;
|
||||
+ else
|
||||
+ NAPI_GRO_CB(p)->last->next = skb;
|
||||
+
|
||||
+ skb_pull(skb, skb_gro_offset(skb));
|
||||
+
|
||||
+ NAPI_GRO_CB(p)->last = skb;
|
||||
+ NAPI_GRO_CB(p)->count++;
|
||||
+ p->data_len += skb->len;
|
||||
+
|
||||
+ /* sk ownership - if any - completely transferred to the aggregated packet */
|
||||
+ skb->destructor = NULL;
|
||||
+ skb->sk = NULL;
|
||||
+ p->truesize += skb->truesize;
|
||||
+ p->len += skb->len;
|
||||
+
|
||||
+ NAPI_GRO_CB(skb)->same_flow = 1;
|
||||
+
|
||||
+ return 0;
|
||||
+}
|
||||
+
|
||||
|
||||
static void napi_gro_complete(struct napi_struct *napi, struct sk_buff *skb)
|
||||
{
|
||||
--- a/net/ipv4/tcp_offload.c
|
||||
+++ b/net/ipv4/tcp_offload.c
|
||||
@@ -28,6 +28,68 @@ static void tcp_gso_tstamp(struct sk_buf
|
||||
}
|
||||
}
|
||||
|
||||
+static void __tcpv4_gso_segment_csum(struct sk_buff *seg,
|
||||
+ __be32 *oldip, __be32 *newip,
|
||||
+ __be16 *oldport, __be16 *newport)
|
||||
+{
|
||||
+ struct tcphdr *th;
|
||||
+ struct iphdr *iph;
|
||||
+
|
||||
+ if (*oldip == *newip && *oldport == *newport)
|
||||
+ return;
|
||||
+
|
||||
+ th = tcp_hdr(seg);
|
||||
+ iph = ip_hdr(seg);
|
||||
+
|
||||
+ inet_proto_csum_replace4(&th->check, seg, *oldip, *newip, true);
|
||||
+ inet_proto_csum_replace2(&th->check, seg, *oldport, *newport, false);
|
||||
+ *oldport = *newport;
|
||||
+
|
||||
+ csum_replace4(&iph->check, *oldip, *newip);
|
||||
+ *oldip = *newip;
|
||||
+}
|
||||
+
|
||||
+static struct sk_buff *__tcpv4_gso_segment_list_csum(struct sk_buff *segs)
|
||||
+{
|
||||
+ struct sk_buff *seg;
|
||||
+ struct tcphdr *th, *th2;
|
||||
+ struct iphdr *iph, *iph2;
|
||||
+
|
||||
+ seg = segs;
|
||||
+ th = tcp_hdr(seg);
|
||||
+ iph = ip_hdr(seg);
|
||||
+ th2 = tcp_hdr(seg->next);
|
||||
+ iph2 = ip_hdr(seg->next);
|
||||
+
|
||||
+ if (!(*(u32 *)&th->source ^ *(u32 *)&th2->source) &&
|
||||
+ iph->daddr == iph2->daddr && iph->saddr == iph2->saddr)
|
||||
+ return segs;
|
||||
+
|
||||
+ while ((seg = seg->next)) {
|
||||
+ th2 = tcp_hdr(seg);
|
||||
+ iph2 = ip_hdr(seg);
|
||||
+
|
||||
+ __tcpv4_gso_segment_csum(seg,
|
||||
+ &iph2->saddr, &iph->saddr,
|
||||
+ &th2->source, &th->source);
|
||||
+ __tcpv4_gso_segment_csum(seg,
|
||||
+ &iph2->daddr, &iph->daddr,
|
||||
+ &th2->dest, &th->dest);
|
||||
+ }
|
||||
+
|
||||
+ return segs;
|
||||
+}
|
||||
+
|
||||
+static struct sk_buff *__tcp4_gso_segment_list(struct sk_buff *skb,
|
||||
+ netdev_features_t features)
|
||||
+{
|
||||
+ skb = skb_segment_list(skb, features, skb_mac_header_len(skb));
|
||||
+ if (IS_ERR(skb))
|
||||
+ return skb;
|
||||
+
|
||||
+ return __tcpv4_gso_segment_list_csum(skb);
|
||||
+}
|
||||
+
|
||||
static struct sk_buff *tcp4_gso_segment(struct sk_buff *skb,
|
||||
netdev_features_t features)
|
||||
{
|
||||
@@ -37,6 +99,9 @@ static struct sk_buff *tcp4_gso_segment(
|
||||
if (!pskb_may_pull(skb, sizeof(struct tcphdr)))
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_FRAGLIST)
|
||||
+ return __tcp4_gso_segment_list(skb, features);
|
||||
+
|
||||
if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
|
||||
const struct iphdr *iph = ip_hdr(skb);
|
||||
struct tcphdr *th = tcp_hdr(skb);
|
||||
@@ -178,61 +243,76 @@ out:
|
||||
return segs;
|
||||
}
|
||||
|
||||
-struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb)
|
||||
+struct sk_buff *tcp_gro_lookup(struct list_head *head, struct tcphdr *th)
|
||||
{
|
||||
- struct sk_buff *pp = NULL;
|
||||
+ struct tcphdr *th2;
|
||||
struct sk_buff *p;
|
||||
+
|
||||
+ list_for_each_entry(p, head, list) {
|
||||
+ if (!NAPI_GRO_CB(p)->same_flow)
|
||||
+ continue;
|
||||
+
|
||||
+ th2 = tcp_hdr(p);
|
||||
+ if (*(u32 *)&th->source ^ *(u32 *)&th2->source) {
|
||||
+ NAPI_GRO_CB(p)->same_flow = 0;
|
||||
+ continue;
|
||||
+ }
|
||||
+
|
||||
+ return p;
|
||||
+ }
|
||||
+
|
||||
+ return NULL;
|
||||
+}
|
||||
+
|
||||
+struct tcphdr *tcp_gro_pull_header(struct sk_buff *skb)
|
||||
+{
|
||||
+ unsigned int thlen, hlen, off;
|
||||
struct tcphdr *th;
|
||||
- struct tcphdr *th2;
|
||||
- unsigned int len;
|
||||
- unsigned int thlen;
|
||||
- __be32 flags;
|
||||
- unsigned int mss = 1;
|
||||
- unsigned int hlen;
|
||||
- unsigned int off;
|
||||
- int flush = 1;
|
||||
- int i;
|
||||
|
||||
off = skb_gro_offset(skb);
|
||||
hlen = off + sizeof(*th);
|
||||
th = skb_gro_header(skb, hlen, off);
|
||||
if (unlikely(!th))
|
||||
- goto out;
|
||||
+ return NULL;
|
||||
|
||||
thlen = th->doff * 4;
|
||||
if (thlen < sizeof(*th))
|
||||
- goto out;
|
||||
+ return NULL;
|
||||
|
||||
hlen = off + thlen;
|
||||
if (skb_gro_header_hard(skb, hlen)) {
|
||||
th = skb_gro_header_slow(skb, hlen, off);
|
||||
if (unlikely(!th))
|
||||
- goto out;
|
||||
+ return NULL;
|
||||
}
|
||||
|
||||
skb_gro_pull(skb, thlen);
|
||||
|
||||
- len = skb_gro_len(skb);
|
||||
- flags = tcp_flag_word(th);
|
||||
-
|
||||
- list_for_each_entry(p, head, list) {
|
||||
- if (!NAPI_GRO_CB(p)->same_flow)
|
||||
- continue;
|
||||
+ return th;
|
||||
+}
|
||||
|
||||
- th2 = tcp_hdr(p);
|
||||
+struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb,
|
||||
+ struct tcphdr *th)
|
||||
+{
|
||||
+ unsigned int thlen = th->doff * 4;
|
||||
+ struct sk_buff *pp = NULL;
|
||||
+ struct sk_buff *p;
|
||||
+ struct tcphdr *th2;
|
||||
+ unsigned int len;
|
||||
+ __be32 flags;
|
||||
+ unsigned int mss = 1;
|
||||
+ int flush = 1;
|
||||
+ int i;
|
||||
|
||||
- if (*(u32 *)&th->source ^ *(u32 *)&th2->source) {
|
||||
- NAPI_GRO_CB(p)->same_flow = 0;
|
||||
- continue;
|
||||
- }
|
||||
+ len = skb_gro_len(skb);
|
||||
+ flags = tcp_flag_word(th);
|
||||
|
||||
- goto found;
|
||||
- }
|
||||
- p = NULL;
|
||||
- goto out_check_final;
|
||||
+ p = tcp_gro_lookup(head, th);
|
||||
+ if (!p)
|
||||
+ goto out_check_final;
|
||||
|
||||
-found:
|
||||
/* Include the IP ID check below from the inner most IP hdr */
|
||||
+ th2 = tcp_hdr(p);
|
||||
flush = NAPI_GRO_CB(p)->flush;
|
||||
flush |= (__force int)(flags & TCP_FLAG_CWR);
|
||||
flush |= (__force int)((flags ^ tcp_flag_word(th2)) &
|
||||
@@ -269,6 +349,19 @@ found:
|
||||
flush |= p->decrypted ^ skb->decrypted;
|
||||
#endif
|
||||
|
||||
+ if (NAPI_GRO_CB(p)->is_flist) {
|
||||
+ flush |= (__force int)(flags ^ tcp_flag_word(th2));
|
||||
+ flush |= skb->ip_summed != p->ip_summed;
|
||||
+ flush |= skb->csum_level != p->csum_level;
|
||||
+ flush |= !pskb_may_pull(skb, skb_gro_offset(skb));
|
||||
+ flush |= NAPI_GRO_CB(p)->count >= 64;
|
||||
+
|
||||
+ if (flush || skb_gro_receive_list(p, skb))
|
||||
+ mss = 1;
|
||||
+
|
||||
+ goto out_check_final;
|
||||
+ }
|
||||
+
|
||||
if (flush || skb_gro_receive(p, skb)) {
|
||||
mss = 1;
|
||||
goto out_check_final;
|
||||
@@ -290,7 +383,6 @@ out_check_final:
|
||||
if (p && (!NAPI_GRO_CB(skb)->same_flow || flush))
|
||||
pp = p;
|
||||
|
||||
-out:
|
||||
NAPI_GRO_CB(skb)->flush |= (flush != 0);
|
||||
|
||||
return pp;
|
||||
@@ -314,18 +406,56 @@ void tcp_gro_complete(struct sk_buff *sk
|
||||
}
|
||||
EXPORT_SYMBOL(tcp_gro_complete);
|
||||
|
||||
+static void tcp4_check_fraglist_gro(struct list_head *head, struct sk_buff *skb,
|
||||
+ struct tcphdr *th)
|
||||
+{
|
||||
+ const struct iphdr *iph = skb_gro_network_header(skb);
|
||||
+ struct net *net = dev_net(skb->dev);
|
||||
+ struct sk_buff *p;
|
||||
+ struct sock *sk;
|
||||
+ int iif, sdif;
|
||||
+
|
||||
+ if (!(skb->dev->features & NETIF_F_GRO_FRAGLIST))
|
||||
+ return;
|
||||
+
|
||||
+ p = tcp_gro_lookup(head, th);
|
||||
+ if (p) {
|
||||
+ NAPI_GRO_CB(skb)->is_flist = NAPI_GRO_CB(p)->is_flist;
|
||||
+ return;
|
||||
+ }
|
||||
+
|
||||
+ inet_get_iif_sdif(skb, &iif, &sdif);
|
||||
+ sk = __inet_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
|
||||
+ iph->saddr, th->source,
|
||||
+ iph->daddr, ntohs(th->dest),
|
||||
+ iif, sdif);
|
||||
+ NAPI_GRO_CB(skb)->is_flist = !sk;
|
||||
+ if (sk)
|
||||
+ sock_put(sk);
|
||||
+}
|
||||
+
|
||||
INDIRECT_CALLABLE_SCOPE
|
||||
struct sk_buff *tcp4_gro_receive(struct list_head *head, struct sk_buff *skb)
|
||||
{
|
||||
+ struct tcphdr *th;
|
||||
+
|
||||
/* Don't bother verifying checksum if we're going to flush anyway. */
|
||||
if (!NAPI_GRO_CB(skb)->flush &&
|
||||
skb_gro_checksum_validate(skb, IPPROTO_TCP,
|
||||
- inet_gro_compute_pseudo)) {
|
||||
- NAPI_GRO_CB(skb)->flush = 1;
|
||||
- return NULL;
|
||||
- }
|
||||
+ inet_gro_compute_pseudo))
|
||||
+ goto flush;
|
||||
+
|
||||
+ th = tcp_gro_pull_header(skb);
|
||||
+ if (!th)
|
||||
+ goto flush;
|
||||
|
||||
- return tcp_gro_receive(head, skb);
|
||||
+ tcp4_check_fraglist_gro(head, skb, th);
|
||||
+
|
||||
+ return tcp_gro_receive(head, skb, th);
|
||||
+
|
||||
+flush:
|
||||
+ NAPI_GRO_CB(skb)->flush = 1;
|
||||
+ return NULL;
|
||||
}
|
||||
|
||||
INDIRECT_CALLABLE_SCOPE int tcp4_gro_complete(struct sk_buff *skb, int thoff)
|
||||
@@ -333,6 +463,15 @@ INDIRECT_CALLABLE_SCOPE int tcp4_gro_com
|
||||
const struct iphdr *iph = ip_hdr(skb);
|
||||
struct tcphdr *th = tcp_hdr(skb);
|
||||
|
||||
+ if (NAPI_GRO_CB(skb)->is_flist) {
|
||||
+ skb_shinfo(skb)->gso_type |= SKB_GSO_FRAGLIST | SKB_GSO_TCPV4;
|
||||
+ skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
|
||||
+
|
||||
+ __skb_incr_checksum_unnecessary(skb);
|
||||
+
|
||||
+ return 0;
|
||||
+ }
|
||||
+
|
||||
th->check = ~tcp_v4_check(skb->len - thoff, iph->saddr,
|
||||
iph->daddr, 0);
|
||||
skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV4;
|
||||
--- a/net/ipv4/udp_offload.c
|
||||
+++ b/net/ipv4/udp_offload.c
|
||||
@@ -433,33 +433,6 @@ out:
|
||||
return segs;
|
||||
}
|
||||
|
||||
-static int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb)
|
||||
-{
|
||||
- if (unlikely(p->len + skb->len >= 65536))
|
||||
- return -E2BIG;
|
||||
-
|
||||
- if (NAPI_GRO_CB(p)->last == p)
|
||||
- skb_shinfo(p)->frag_list = skb;
|
||||
- else
|
||||
- NAPI_GRO_CB(p)->last->next = skb;
|
||||
-
|
||||
- skb_pull(skb, skb_gro_offset(skb));
|
||||
-
|
||||
- NAPI_GRO_CB(p)->last = skb;
|
||||
- NAPI_GRO_CB(p)->count++;
|
||||
- p->data_len += skb->len;
|
||||
-
|
||||
- /* sk ownership - if any - completely transferred to the aggregated packet */
|
||||
- skb->destructor = NULL;
|
||||
- skb->sk = NULL;
|
||||
- p->truesize += skb->truesize;
|
||||
- p->len += skb->len;
|
||||
-
|
||||
- NAPI_GRO_CB(skb)->same_flow = 1;
|
||||
-
|
||||
- return 0;
|
||||
-}
|
||||
-
|
||||
|
||||
#define UDP_GRO_CNT_MAX 64
|
||||
static struct sk_buff *udp_gro_receive_segment(struct list_head *head,
|
||||
--- a/net/ipv6/tcpv6_offload.c
|
||||
+++ b/net/ipv6/tcpv6_offload.c
|
||||
@@ -7,24 +7,65 @@
|
||||
*/
|
||||
#include <linux/indirect_call_wrapper.h>
|
||||
#include <linux/skbuff.h>
|
||||
+#include <net/inet6_hashtables.h>
|
||||
#include <net/gro.h>
|
||||
#include <net/protocol.h>
|
||||
#include <net/tcp.h>
|
||||
#include <net/ip6_checksum.h>
|
||||
#include "ip6_offload.h"
|
||||
|
||||
+static void tcp6_check_fraglist_gro(struct list_head *head, struct sk_buff *skb,
|
||||
+ struct tcphdr *th)
|
||||
+{
|
||||
+#if IS_ENABLED(CONFIG_IPV6)
|
||||
+ const struct ipv6hdr *hdr = skb_gro_network_header(skb);
|
||||
+ struct net *net = dev_net(skb->dev);
|
||||
+ struct sk_buff *p;
|
||||
+ struct sock *sk;
|
||||
+ int iif, sdif;
|
||||
+
|
||||
+ if (!(skb->dev->features & NETIF_F_GRO_FRAGLIST))
|
||||
+ return;
|
||||
+
|
||||
+ p = tcp_gro_lookup(head, th);
|
||||
+ if (p) {
|
||||
+ NAPI_GRO_CB(skb)->is_flist = NAPI_GRO_CB(p)->is_flist;
|
||||
+ return;
|
||||
+ }
|
||||
+
|
||||
+ inet6_get_iif_sdif(skb, &iif, &sdif);
|
||||
+ sk = __inet6_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
|
||||
+ &hdr->saddr, th->source,
|
||||
+ &hdr->daddr, ntohs(th->dest),
|
||||
+ iif, sdif);
|
||||
+ NAPI_GRO_CB(skb)->is_flist = !sk;
|
||||
+ if (sk)
|
||||
+ sock_put(sk);
|
||||
+#endif /* IS_ENABLED(CONFIG_IPV6) */
|
||||
+}
|
||||
+
|
||||
INDIRECT_CALLABLE_SCOPE
|
||||
struct sk_buff *tcp6_gro_receive(struct list_head *head, struct sk_buff *skb)
|
||||
{
|
||||
+ struct tcphdr *th;
|
||||
+
|
||||
/* Don't bother verifying checksum if we're going to flush anyway. */
|
||||
if (!NAPI_GRO_CB(skb)->flush &&
|
||||
skb_gro_checksum_validate(skb, IPPROTO_TCP,
|
||||
- ip6_gro_compute_pseudo)) {
|
||||
- NAPI_GRO_CB(skb)->flush = 1;
|
||||
- return NULL;
|
||||
- }
|
||||
+ ip6_gro_compute_pseudo))
|
||||
+ goto flush;
|
||||
|
||||
- return tcp_gro_receive(head, skb);
|
||||
+ th = tcp_gro_pull_header(skb);
|
||||
+ if (!th)
|
||||
+ goto flush;
|
||||
+
|
||||
+ tcp6_check_fraglist_gro(head, skb, th);
|
||||
+
|
||||
+ return tcp_gro_receive(head, skb, th);
|
||||
+
|
||||
+flush:
|
||||
+ NAPI_GRO_CB(skb)->flush = 1;
|
||||
+ return NULL;
|
||||
}
|
||||
|
||||
INDIRECT_CALLABLE_SCOPE int tcp6_gro_complete(struct sk_buff *skb, int thoff)
|
||||
@@ -32,6 +73,15 @@ INDIRECT_CALLABLE_SCOPE int tcp6_gro_com
|
||||
const struct ipv6hdr *iph = ipv6_hdr(skb);
|
||||
struct tcphdr *th = tcp_hdr(skb);
|
||||
|
||||
+ if (NAPI_GRO_CB(skb)->is_flist) {
|
||||
+ skb_shinfo(skb)->gso_type |= SKB_GSO_FRAGLIST | SKB_GSO_TCPV6;
|
||||
+ skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
|
||||
+
|
||||
+ __skb_incr_checksum_unnecessary(skb);
|
||||
+
|
||||
+ return 0;
|
||||
+ }
|
||||
+
|
||||
th->check = ~tcp_v6_check(skb->len - thoff, &iph->saddr,
|
||||
&iph->daddr, 0);
|
||||
skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV6;
|
||||
@@ -51,6 +101,9 @@ static struct sk_buff *tcp6_gso_segment(
|
||||
if (!pskb_may_pull(skb, sizeof(*th)))
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_FRAGLIST)
|
||||
+ return skb_segment_list(skb, features, skb_mac_header_len(skb));
|
||||
+
|
||||
if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
|
||||
const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
|
||||
struct tcphdr *th = tcp_hdr(skb);
|
||||
@ -17,7 +17,7 @@ Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
|
||||
|
||||
--- a/include/linux/netdevice.h
|
||||
+++ b/include/linux/netdevice.h
|
||||
@@ -2245,7 +2245,7 @@ struct net_device {
|
||||
@@ -2243,7 +2243,7 @@ struct net_device {
|
||||
#if IS_ENABLED(CONFIG_AX25)
|
||||
void *ax25_ptr;
|
||||
#endif
|
||||
|
||||
@ -20,7 +20,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
|
||||
/**
|
||||
* napi_disable - prevent NAPI from scheduling
|
||||
@@ -3238,6 +3239,7 @@ struct softnet_data {
|
||||
@@ -3236,6 +3237,7 @@ struct softnet_data {
|
||||
/* stats */
|
||||
unsigned int processed;
|
||||
unsigned int time_squeeze;
|
||||
@ -157,7 +157,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
void netif_napi_add_weight(struct net_device *dev, struct napi_struct *napi,
|
||||
int (*poll)(struct napi_struct *, int), int weight)
|
||||
{
|
||||
@@ -11351,6 +11422,9 @@ static int dev_cpu_dead(unsigned int old
|
||||
@@ -11306,6 +11377,9 @@ static int dev_cpu_dead(unsigned int old
|
||||
raise_softirq_irqoff(NET_TX_SOFTIRQ);
|
||||
local_irq_enable();
|
||||
|
||||
@ -167,7 +167,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
#ifdef CONFIG_RPS
|
||||
remsd = oldsd->rps_ipi_list;
|
||||
oldsd->rps_ipi_list = NULL;
|
||||
@@ -11666,6 +11740,7 @@ static int __init net_dev_init(void)
|
||||
@@ -11621,6 +11695,7 @@ static int __init net_dev_init(void)
|
||||
INIT_CSD(&sd->defer_csd, trigger_rx_softirq, sd);
|
||||
spin_lock_init(&sd->defer_lock);
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user