1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
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
@@ -1931,6 +1931,8 @@ 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
@@ -824,6 +824,7 @@ struct sk_buff {
#ifdef CONFIG_TLS_DEVICE
__u8 decrypted:1;
#endif
+ __u8 gro_skip:1;
#ifdef CONFIG_NET_SCHED
__u16 tc_index; /* traffic control index */
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5470,6 +5470,9 @@ static enum gro_result dev_gro_receive(s
int same_flow;
int grow;
+ if (skb->gro_skip)
+ goto normal;
+
if (netif_elide_gro(skb->dev))
goto normal;
@@ -7265,6 +7268,48 @@ 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,
@@ -7315,6 +7360,7 @@ 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);
@@ -7408,6 +7454,7 @@ void netdev_upper_dev_unlink(struct net_
__netdev_adjacent_dev_unlink_neighbour(dev, upper_dev);
+ netdev_update_addr_mask(dev);
call_netdevice_notifiers_info(NETDEV_CHANGEUPPER,
&changeupper_info.info);
@@ -8138,6 +8185,7 @@ int dev_set_mac_address(struct net_devic
if (err)
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;
}
/*
|
