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ipv6: Create ip6_tnl_xmit

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This patch renames ip6_tnl_xmit2 to ip6_tnl_xmit and exports it. Other
users like GRE will be able to call this. The original ip6_tnl_xmit
function is renamed to ip6_tnl_start_xmit (this is an ndo_start_xmit
function).

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2016-04-29 17:12:18 -07:00 committed by David S. Miller
parent 308edfdf15
commit 8eb30be035
2 changed files with 32 additions and 17 deletions
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2
include/net/ip6_tunnel.h
View File

@ -69,6 +69,8 @@ int ip6_tnl_rcv(struct ip6_tnl *tunnel, struct sk_buff *skb,
bool log_ecn_error); bool log_ecn_error);
int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
const struct in6_addr *raddr); const struct in6_addr *raddr);
int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield,
struct flowi6 *fl6, int encap_limit, __u32 *pmtu, __u8 proto);
__u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw); __u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw);
__u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr, __u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr,
const struct in6_addr *raddr); const struct in6_addr *raddr);

47
net/ipv6/ip6_tunnel.c
View File

@ -979,13 +979,14 @@ int ip6_tnl_xmit_ctl(struct ip6_tnl *t,
EXPORT_SYMBOL_GPL(ip6_tnl_xmit_ctl); EXPORT_SYMBOL_GPL(ip6_tnl_xmit_ctl);
/** /**
* ip6_tnl_xmit2 - encapsulate packet and send * ip6_tnl_xmit - encapsulate packet and send
* @skb: the outgoing socket buffer * @skb: the outgoing socket buffer
* @dev: the outgoing tunnel device * @dev: the outgoing tunnel device
* @dsfield: dscp code for outer header * @dsfield: dscp code for outer header
* @fl: flow of tunneled packet * @fl6: flow of tunneled packet
* @encap_limit: encapsulation limit * @encap_limit: encapsulation limit
* @pmtu: Path MTU is stored if packet is too big * @pmtu: Path MTU is stored if packet is too big
* @proto: next header value
* *
* Description: * Description:
* Build new header and do some sanity checks on the packet before sending * Build new header and do some sanity checks on the packet before sending
@ -997,12 +998,9 @@ EXPORT_SYMBOL_GPL(ip6_tnl_xmit_ctl);
* %-EMSGSIZE message too big. return mtu in this case. * %-EMSGSIZE message too big. return mtu in this case.
**/ **/
static int ip6_tnl_xmit2(struct sk_buff *skb, int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield,
struct net_device *dev, struct flowi6 *fl6, int encap_limit, __u32 *pmtu,
__u8 dsfield, __u8 proto)
struct flowi6 *fl6,
int encap_limit,
__u32 *pmtu)
{ {
struct ip6_tnl *t = netdev_priv(dev); struct ip6_tnl *t = netdev_priv(dev);
struct net *net = t->net; struct net *net = t->net;
@ -1013,7 +1011,6 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
struct net_device *tdev; struct net_device *tdev;
int mtu; int mtu;
unsigned int max_headroom = sizeof(struct ipv6hdr); unsigned int max_headroom = sizeof(struct ipv6hdr);
u8 proto;
int err = -1; int err = -1;
/* NBMA tunnel */ /* NBMA tunnel */
@ -1075,12 +1072,23 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
mtu = IPV6_MIN_MTU; mtu = IPV6_MIN_MTU;
if (skb_dst(skb)) if (skb_dst(skb))
skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu); skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu);
if (skb->len > mtu) { if (skb->len > mtu && !skb_is_gso(skb)) {
*pmtu = mtu; *pmtu = mtu;
err = -EMSGSIZE; err = -EMSGSIZE;
goto tx_err_dst_release; goto tx_err_dst_release;
} }
if (t->err_count > 0) {
if (time_before(jiffies,
t->err_time + IP6TUNNEL_ERR_TIMEO)) {
t->err_count--;
dst_link_failure(skb);
} else {
t->err_count = 0;
}
}
skb_scrub_packet(skb, !net_eq(t->net, dev_net(dev))); skb_scrub_packet(skb, !net_eq(t->net, dev_net(dev)));
/* /*
@ -1108,7 +1116,6 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
skb->transport_header = skb->network_header; skb->transport_header = skb->network_header;
proto = fl6->flowi6_proto;
if (encap_limit >= 0) { if (encap_limit >= 0) {
init_tel_txopt(&opt, encap_limit); init_tel_txopt(&opt, encap_limit);
ipv6_push_nfrag_opts(skb, &opt.ops, &proto, NULL); ipv6_push_nfrag_opts(skb, &opt.ops, &proto, NULL);
@ -1119,6 +1126,11 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
skb->encapsulation = 1; skb->encapsulation = 1;
} }
max_headroom = LL_RESERVED_SPACE(dst->dev) + sizeof(struct ipv6hdr)
+ dst->header_len;
if (max_headroom > dev->needed_headroom)
dev->needed_headroom = max_headroom;
skb_push(skb, sizeof(struct ipv6hdr)); skb_push(skb, sizeof(struct ipv6hdr));
skb_reset_network_header(skb); skb_reset_network_header(skb);
ipv6h = ipv6_hdr(skb); ipv6h = ipv6_hdr(skb);
@ -1137,6 +1149,7 @@ tx_err_dst_release:
dst_release(dst); dst_release(dst);
return err; return err;
} }
EXPORT_SYMBOL(ip6_tnl_xmit);
static inline int static inline int
ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
@ -1160,7 +1173,6 @@ ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
encap_limit = t->parms.encap_limit; encap_limit = t->parms.encap_limit;
memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6)); memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6));
fl6.flowi6_proto = IPPROTO_IPIP;
dsfield = ipv4_get_dsfield(iph); dsfield = ipv4_get_dsfield(iph);
@ -1170,7 +1182,8 @@ ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK) if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
fl6.flowi6_mark = skb->mark; fl6.flowi6_mark = skb->mark;
err = ip6_tnl_xmit2(skb, dev, dsfield, &fl6, encap_limit, &mtu); err = ip6_tnl_xmit(skb, dev, dsfield, &fl6, encap_limit, &mtu,
IPPROTO_IPIP);
if (err != 0) { if (err != 0) {
/* XXX: send ICMP error even if DF is not set. */ /* XXX: send ICMP error even if DF is not set. */
if (err == -EMSGSIZE) if (err == -EMSGSIZE)
@ -1214,7 +1227,6 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
encap_limit = t->parms.encap_limit; encap_limit = t->parms.encap_limit;
memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6)); memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6));
fl6.flowi6_proto = IPPROTO_IPV6;
dsfield = ipv6_get_dsfield(ipv6h); dsfield = ipv6_get_dsfield(ipv6h);
if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS) if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
@ -1224,7 +1236,8 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK) if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
fl6.flowi6_mark = skb->mark; fl6.flowi6_mark = skb->mark;
err = ip6_tnl_xmit2(skb, dev, dsfield, &fl6, encap_limit, &mtu); err = ip6_tnl_xmit(skb, dev, dsfield, &fl6, encap_limit, &mtu,
IPPROTO_IPV6);
if (err != 0) { if (err != 0) {
if (err == -EMSGSIZE) if (err == -EMSGSIZE)
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
@ -1235,7 +1248,7 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
} }
static netdev_tx_t static netdev_tx_t
ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) ip6_tnl_start_xmit(struct sk_buff *skb, struct net_device *dev)
{ {
struct ip6_tnl *t = netdev_priv(dev); struct ip6_tnl *t = netdev_priv(dev);
struct net_device_stats *stats = &t->dev->stats; struct net_device_stats *stats = &t->dev->stats;
@ -1556,7 +1569,7 @@ EXPORT_SYMBOL(ip6_tnl_get_iflink);
static const struct net_device_ops ip6_tnl_netdev_ops = { static const struct net_device_ops ip6_tnl_netdev_ops = {
.ndo_init = ip6_tnl_dev_init, .ndo_init = ip6_tnl_dev_init,
.ndo_uninit = ip6_tnl_dev_uninit, .ndo_uninit = ip6_tnl_dev_uninit,
.ndo_start_xmit = ip6_tnl_xmit, .ndo_start_xmit = ip6_tnl_start_xmit,
.ndo_do_ioctl = ip6_tnl_ioctl, .ndo_do_ioctl = ip6_tnl_ioctl,
.ndo_change_mtu = ip6_tnl_change_mtu, .ndo_change_mtu = ip6_tnl_change_mtu,
.ndo_get_stats = ip6_get_stats, .ndo_get_stats = ip6_get_stats,