netfilter: fix hardware offload regression (FS#1551)
[openwrt/openwrt.git] / target / linux / generic / pending-4.14 / 644-net-pppoe-support-hardware-flow-table-offload.patch
1 From: Felix Fietkau <nbd@nbd.name>
2 Date: Thu, 15 Mar 2018 21:15:00 +0100
3 Subject: [PATCH] net: pppoe: support hardware flow table offload
4
5 Pass on the PPPoE session ID and the remote MAC address
6
7 Signed-off-by: Felix Fietkau <nbd@nbd.name>
8 ---
9
10 --- a/drivers/net/ppp/ppp_generic.c
11 +++ b/drivers/net/ppp/ppp_generic.c
12 @@ -56,6 +56,11 @@
13 #include <net/net_namespace.h>
14 #include <net/netns/generic.h>
15
16 +#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
17 +#include <linux/netfilter.h>
18 +#include <net/netfilter/nf_flow_table.h>
19 +#endif
20 +
21 #define PPP_VERSION "2.4.2"
22
23 /*
24 @@ -1382,12 +1387,37 @@ static void ppp_dev_priv_destructor(stru
25 ppp_destroy_interface(ppp);
26 }
27
28 +#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
29 +static int ppp_flow_offload_check(struct flow_offload_hw_path *path)
30 +{
31 + struct ppp *ppp = netdev_priv(path->dev);
32 + struct ppp_channel *chan;
33 + struct channel *pch;
34 +
35 + if (ppp->flags & SC_MULTILINK)
36 + return -EOPNOTSUPP;
37 +
38 + if (list_empty(&ppp->channels))
39 + return -ENODEV;
40 +
41 + pch = list_first_entry(&ppp->channels, struct channel, clist);
42 + chan = pch->chan;
43 + if (!chan->ops->flow_offload_check)
44 + return -EOPNOTSUPP;
45 +
46 + return chan->ops->flow_offload_check(chan, path);
47 +}
48 +#endif /* CONFIG_NF_FLOW_TABLE */
49 +
50 static const struct net_device_ops ppp_netdev_ops = {
51 .ndo_init = ppp_dev_init,
52 .ndo_uninit = ppp_dev_uninit,
53 .ndo_start_xmit = ppp_start_xmit,
54 .ndo_do_ioctl = ppp_net_ioctl,
55 .ndo_get_stats64 = ppp_get_stats64,
56 +#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
57 + .ndo_flow_offload_check = ppp_flow_offload_check,
58 +#endif
59 };
60
61 static struct device_type ppp_type = {
62 --- a/drivers/net/ppp/pppoe.c
63 +++ b/drivers/net/ppp/pppoe.c
64 @@ -78,6 +78,11 @@
65 #include <linux/proc_fs.h>
66 #include <linux/seq_file.h>
67
68 +#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
69 +#include <linux/netfilter.h>
70 +#include <net/netfilter/nf_flow_table.h>
71 +#endif
72 +
73 #include <linux/nsproxy.h>
74 #include <net/net_namespace.h>
75 #include <net/netns/generic.h>
76 @@ -970,8 +975,36 @@ static int pppoe_xmit(struct ppp_channel
77 return __pppoe_xmit(sk, skb);
78 }
79
80 +#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
81 +static int pppoe_flow_offload_check(struct ppp_channel *chan,
82 + struct flow_offload_hw_path *path)
83 +{
84 + struct sock *sk = (struct sock *)chan->private;
85 + struct pppox_sock *po = pppox_sk(sk);
86 + struct net_device *dev = po->pppoe_dev;
87 +
88 + if (sock_flag(sk, SOCK_DEAD) ||
89 + !(sk->sk_state & PPPOX_CONNECTED) || !dev)
90 + return -ENODEV;
91 +
92 + path->dev = po->pppoe_dev;
93 + path->flags |= FLOW_OFFLOAD_PATH_PPPOE;
94 + memcpy(path->eth_src, po->pppoe_dev->dev_addr, ETH_ALEN);
95 + memcpy(path->eth_dest, po->pppoe_pa.remote, ETH_ALEN);
96 + path->pppoe_sid = be16_to_cpu(po->num);
97 +
98 + if (path->dev->netdev_ops->ndo_flow_offload_check)
99 + return path->dev->netdev_ops->ndo_flow_offload_check(path);
100 +
101 + return 0;
102 +}
103 +#endif /* CONFIG_NF_FLOW_TABLE */
104 +
105 static const struct ppp_channel_ops pppoe_chan_ops = {
106 .start_xmit = pppoe_xmit,
107 +#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
108 + .flow_offload_check = pppoe_flow_offload_check,
109 +#endif
110 };
111
112 static int pppoe_recvmsg(struct socket *sock, struct msghdr *m,
113 --- a/include/linux/ppp_channel.h
114 +++ b/include/linux/ppp_channel.h
115 @@ -32,6 +32,10 @@ struct ppp_channel_ops {
116 int (*start_xmit)(struct ppp_channel *, struct sk_buff *);
117 /* Handle an ioctl call that has come in via /dev/ppp. */
118 int (*ioctl)(struct ppp_channel *, unsigned int, unsigned long);
119 +
120 +#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
121 + int (*flow_offload_check)(struct ppp_channel *, struct flow_offload_hw_path *);
122 +#endif
123 };
124
125 struct ppp_channel {