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geneve: allow user to specify TOS info for tunnel frames

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Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John W. Linville 2015-06-01 15:51:35 -04:00 • committed by David S. Miller
commit d89511251f
2 changed files with 15 additions and 4 deletions
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18
drivers/net/geneve.c
View file

@ -46,6 +46,7 @@ struct geneve_dev {
struct geneve_sock *sock; /* socket used for geneve tunnel */
u8 vni[3]; /* virtual network ID for tunnel */
u8 ttl; /* TTL override */
u8 tos; /* TOS override */
struct sockaddr_in remote; /* IPv4 address for link partner */
struct list_head next; /* geneve's per namespace list */
};
@ -194,7 +195,12 @@ static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
/* TODO: port min/max limits should be configurable */
sport = udp_flow_src_port(dev_net(dev), skb, 0, 0, true);
tos = geneve->tos;
if (tos == 1)
tos = ip_tunnel_get_dsfield(iip, skb);
memset(&fl4, 0, sizeof(fl4));
fl4.flowi4_tos = RT_TOS(tos);
fl4.daddr = geneve->remote.sin_addr.s_addr;
rt = ip_route_output_key(geneve->net, &fl4);
if (IS_ERR(rt)) {
@ -208,9 +214,7 @@ static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
goto rt_tx_error;
}
/* TODO: tos should be configurable */
tos = ip_tunnel_ecn_encap(0, iip, skb);
tos = ip_tunnel_ecn_encap(tos, iip, skb);
ttl = geneve->ttl;
if (!ttl && IN_MULTICAST(ntohl(fl4.daddr)))
@ -300,6 +304,7 @@ static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = {
[IFLA_GENEVE_ID] = { .type = NLA_U32 },
[IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
[IFLA_GENEVE_TTL] = { .type = NLA_U8 },
[IFLA_GENEVE_TOS] = { .type = NLA_U8 },
};
static int geneve_validate(struct nlattr *tb[], struct nlattr *data[])
@ -370,6 +375,9 @@ static int geneve_newlink(struct net *net, struct net_device *dev,
if (data[IFLA_GENEVE_TTL])
geneve->ttl = nla_get_u8(data[IFLA_GENEVE_TTL]);
if (data[IFLA_GENEVE_TOS])
geneve->tos = nla_get_u8(data[IFLA_GENEVE_TOS]);
list_add(&geneve->next, &gn->geneve_list);
hlist_add_head_rcu(&geneve->hlist, &gn->vni_list[hash]);
@ -393,6 +401,7 @@ static size_t geneve_get_size(const struct net_device *dev)
return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */
nla_total_size(sizeof(struct in_addr)) + /* IFLA_GENEVE_REMOTE */
nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */
nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */
0;
}
@ -409,7 +418,8 @@ static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
geneve->remote.sin_addr.s_addr))
goto nla_put_failure;
if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl))
if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) ||
nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos))
goto nla_put_failure;
return 0;

1
include/uapi/linux/if_link.h
View file

@ -396,6 +396,7 @@ enum {
IFLA_GENEVE_ID,
IFLA_GENEVE_REMOTE,
IFLA_GENEVE_TTL,
IFLA_GENEVE_TOS,
__IFLA_GENEVE_MAX
};
#define IFLA_GENEVE_MAX (__IFLA_GENEVE_MAX - 1)