Commit 78fbfd8a authored by David S. Miller's avatar David S. Miller

ipv4: Create and use route lookup helpers.

The idea here is this minimizes the number of places one has to edit
in order to make changes to how flows are defined and used.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1561747d
......@@ -183,17 +183,11 @@ static int addr4_resolve(struct sockaddr_in *src_in,
{
__be32 src_ip = src_in->sin_addr.s_addr;
__be32 dst_ip = dst_in->sin_addr.s_addr;
struct flowi fl;
struct rtable *rt;
struct neighbour *neigh;
int ret;
memset(&fl, 0, sizeof fl);
fl.nl_u.ip4_u.daddr = dst_ip;
fl.nl_u.ip4_u.saddr = src_ip;
fl.oif = addr->bound_dev_if;
rt = ip_route_output_key(&init_net, &fl);
rt = ip_route_output(&init_net, dst_ip, src_ip, 0, addr->bound_dev_if);
if (IS_ERR(rt)) {
ret = PTR_ERR(rt);
goto out;
......
......@@ -338,23 +338,10 @@ static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip,
__be16 peer_port, u8 tos)
{
struct rtable *rt;
struct flowi fl = {
.oif = 0,
.nl_u = {
.ip4_u = {
.daddr = peer_ip,
.saddr = local_ip,
.tos = tos}
},
.proto = IPPROTO_TCP,
.uli_u = {
.ports = {
.sport = local_port,
.dport = peer_port}
}
};
rt = ip_route_output_flow(&init_net, &fl, NULL);
rt = ip_route_output_ports(&init_net, NULL, peer_ip, local_ip,
peer_port, local_port, IPPROTO_TCP,
tos, 0);
if (IS_ERR(rt))
return NULL;
return rt;
......
......@@ -315,23 +315,10 @@ static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip,
__be16 peer_port, u8 tos)
{
struct rtable *rt;
struct flowi fl = {
.oif = 0,
.nl_u = {
.ip4_u = {
.daddr = peer_ip,
.saddr = local_ip,
.tos = tos}
},
.proto = IPPROTO_TCP,
.uli_u = {
.ports = {
.sport = local_port,
.dport = peer_port}
}
};
rt = ip_route_output_flow(&init_net, &fl, NULL);
rt = ip_route_output_ports(&init_net, NULL, peer_ip, local_ip,
peer_port, local_port, IPPROTO_TCP,
tos, 0);
if (IS_ERR(rt))
return NULL;
return rt;
......
......@@ -1104,15 +1104,12 @@ static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
{
struct rtable *rt;
struct flowi fl;
struct neighbour *neigh;
int rc = arpindex;
struct net_device *netdev;
struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
memset(&fl, 0, sizeof fl);
fl.nl_u.ip4_u.daddr = htonl(dst_ip);
rt = ip_route_output_key(&init_net, &fl);
rt = ip_route_output(&init_net, htonl(dst_ip), 0, 0, 0);
if (IS_ERR(rt)) {
printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
__func__, dst_ip);
......
......@@ -2676,7 +2676,6 @@ static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
__be32 *targets = bond->params.arp_targets;
struct vlan_entry *vlan;
struct net_device *vlan_dev;
struct flowi fl;
struct rtable *rt;
for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
......@@ -2695,15 +2694,12 @@ static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
* determine which VLAN interface would be used, so we
* can tag the ARP with the proper VLAN tag.
*/
memset(&fl, 0, sizeof(fl));
fl.fl4_dst = targets[i];
fl.fl4_tos = RTO_ONLINK;
rt = ip_route_output_key(dev_net(bond->dev), &fl);
rt = ip_route_output(dev_net(bond->dev), targets[i], 0,
RTO_ONLINK, 0);
if (IS_ERR(rt)) {
if (net_ratelimit()) {
pr_warning("%s: no route to arp_ip_target %pI4\n",
bond->dev->name, &fl.fl4_dst);
bond->dev->name, &targets[i]);
}
continue;
}
......@@ -2739,7 +2735,7 @@ static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
if (net_ratelimit()) {
pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
bond->dev->name, &fl.fl4_dst,
bond->dev->name, &targets[i],
rt->dst.dev ? rt->dst.dev->name : "NULL");
}
ip_rt_put(rt);
......
......@@ -3407,20 +3407,14 @@ static int cnic_get_v4_route(struct sockaddr_in *dst_addr,
struct dst_entry **dst)
{
#if defined(CONFIG_INET)
struct flowi fl;
int err;
struct rtable *rt;
memset(&fl, 0, sizeof(fl));
fl.nl_u.ip4_u.daddr = dst_addr->sin_addr.s_addr;
rt = ip_route_output_key(&init_net, &fl);
err = 0;
if (!IS_ERR(rt))
rt = ip_route_output(&init_net, dst_addr->sin_addr.s_addr, 0, 0, 0);
if (!IS_ERR(rt)) {
*dst = &rt->dst;
else
err = PTR_ERR(rt);
return err;
return 0;
}
return PTR_ERR(rt);
#else
return -ENETUNREACH;
#endif
......
......@@ -189,18 +189,14 @@ static int pptp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
if (sk_pppox(po)->sk_state & PPPOX_DEAD)
goto tx_error;
{
struct flowi fl = { .oif = 0,
.nl_u = {
.ip4_u = {
.daddr = opt->dst_addr.sin_addr.s_addr,
.saddr = opt->src_addr.sin_addr.s_addr,
.tos = RT_TOS(0) } },
.proto = IPPROTO_GRE };
rt = ip_route_output_key(&init_net, &fl);
if (IS_ERR(rt))
goto tx_error;
}
rt = ip_route_output_ports(&init_net, NULL,
opt->dst_addr.sin_addr.s_addr,
opt->src_addr.sin_addr.s_addr,
0, 0, IPPROTO_GRE,
RT_TOS(0), 0);
if (IS_ERR(rt))
goto tx_error;
tdev = rt->dst.dev;
max_headroom = LL_RESERVED_SPACE(tdev) + sizeof(*iph) + sizeof(*hdr) + 2;
......@@ -467,22 +463,17 @@ static int pptp_connect(struct socket *sock, struct sockaddr *uservaddr,
po->chan.private = sk;
po->chan.ops = &pptp_chan_ops;
{
struct flowi fl = {
.nl_u = {
.ip4_u = {
.daddr = opt->dst_addr.sin_addr.s_addr,
.saddr = opt->src_addr.sin_addr.s_addr,
.tos = RT_CONN_FLAGS(sk) } },
.proto = IPPROTO_GRE };
security_sk_classify_flow(sk, &fl);
rt = ip_route_output_key(&init_net, &fl);
if (IS_ERR(rt)) {
error = -EHOSTUNREACH;
goto end;
}
sk_setup_caps(sk, &rt->dst);
rt = ip_route_output_ports(&init_net, sk,
opt->dst_addr.sin_addr.s_addr,
opt->src_addr.sin_addr.s_addr,
0, 0,
IPPROTO_GRE, RT_CONN_FLAGS(sk), 0);
if (IS_ERR(rt)) {
error = -EHOSTUNREACH;
goto end;
}
sk_setup_caps(sk, &rt->dst);
po->chan.mtu = dst_mtu(&rt->dst);
if (!po->chan.mtu)
po->chan.mtu = PPP_MTU;
......
......@@ -451,26 +451,12 @@ static struct cxgbi_sock *cxgbi_sock_create(struct cxgbi_device *cdev)
}
static struct rtable *find_route_ipv4(__be32 saddr, __be32 daddr,
__be16 sport, __be16 dport, u8 tos)
__be16 sport, __be16 dport, u8 tos)
{
struct rtable *rt;
struct flowi fl = {
.oif = 0,
.nl_u = {
.ip4_u = {
.daddr = daddr,
.saddr = saddr,
.tos = tos }
},
.proto = IPPROTO_TCP,
.uli_u = {
.ports = {
.sport = sport,
.dport = dport }
}
};
rt = ip_route_output_flow(&init_net, &fl, NULL);
rt = ip_route_output_ports(&init_net, NULL, daddr, saddr,
dport, sport, IPPROTO_TCP, tos, 0);
if (IS_ERR(rt))
return NULL;
......
......@@ -132,6 +132,54 @@ static inline struct rtable *ip_route_output_key(struct net *net, struct flowi *
return ip_route_output_flow(net, flp, NULL);
}
static inline struct rtable *ip_route_output(struct net *net, __be32 daddr,
__be32 saddr, u8 tos, int oif)
{
struct flowi fl = {
.oif = oif,
.fl4_dst = daddr,
.fl4_src = saddr,
.fl4_tos = tos,
};
return ip_route_output_key(net, &fl);
}
static inline struct rtable *ip_route_output_ports(struct net *net, struct sock *sk,
__be32 daddr, __be32 saddr,
__be16 dport, __be16 sport,
__u8 proto, __u8 tos, int oif)
{
struct flowi fl = {
.oif = oif,
.flags = sk ? inet_sk_flowi_flags(sk) : 0,
.mark = sk ? sk->sk_mark : 0,
.fl4_dst = daddr,
.fl4_src = saddr,
.fl4_tos = tos,
.proto = proto,
.fl_ip_dport = dport,
.fl_ip_sport = sport,
};
if (sk)
security_sk_classify_flow(sk, &fl);
return ip_route_output_flow(net, &fl, sk);
}
static inline struct rtable *ip_route_output_gre(struct net *net,
__be32 daddr, __be32 saddr,
__be32 gre_key, __u8 tos, int oif)
{
struct flowi fl = {
.oif = oif,
.fl4_dst = daddr,
.fl4_src = saddr,
.fl4_tos = tos,
.proto = IPPROTO_GRE,
.fl_gre_key = gre_key,
};
return ip_route_output_key(net, &fl);
}
extern int ip_route_input_common(struct sk_buff *skb, __be32 dst, __be32 src,
u8 tos, struct net_device *devin, bool noref);
......
......@@ -502,8 +502,6 @@ static int clip_setentry(struct atm_vcc *vcc, __be32 ip)
struct atmarp_entry *entry;
int error;
struct clip_vcc *clip_vcc;
struct flowi fl = { .fl4_dst = ip,
.fl4_tos = 1 };
struct rtable *rt;
if (vcc->push != clip_push) {
......@@ -520,7 +518,7 @@ static int clip_setentry(struct atm_vcc *vcc, __be32 ip)
unlink_clip_vcc(clip_vcc);
return 0;
}
rt = ip_route_output_key(&init_net, &fl);
rt = ip_route_output(&init_net, ip, 0, 1, 0);
if (IS_ERR(rt))
return PTR_ERR(rt);
neigh = __neigh_lookup(&clip_tbl, &ip, rt->dst.dev, 1);
......
......@@ -412,10 +412,6 @@ static int br_nf_pre_routing_finish(struct sk_buff *skb)
nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
if (dnat_took_place(skb)) {
if ((err = ip_route_input(skb, iph->daddr, iph->saddr, iph->tos, dev))) {
struct flowi fl = {
.fl4_dst = iph->daddr,
.fl4_tos = RT_TOS(iph->tos),
};
struct in_device *in_dev = __in_dev_get_rcu(dev);
/* If err equals -EHOSTUNREACH the error is due to a
......@@ -428,7 +424,8 @@ static int br_nf_pre_routing_finish(struct sk_buff *skb)
if (err != -EHOSTUNREACH || !in_dev || IN_DEV_FORWARD(in_dev))
goto free_skb;
rt = ip_route_output_key(dev_net(dev), &fl);
rt = ip_route_output(dev_net(dev), iph->daddr, 0,
RT_TOS(iph->tos), 0);
if (!IS_ERR(rt)) {
/* - Bridged-and-DNAT'ed traffic doesn't
* require ip_forwarding. */
......
......@@ -1157,22 +1157,10 @@ int inet_sk_rebuild_header(struct sock *sk)
daddr = inet->inet_daddr;
if (inet->opt && inet->opt->srr)
daddr = inet->opt->faddr;
{
struct flowi fl = {
.oif = sk->sk_bound_dev_if,
.mark = sk->sk_mark,
.fl4_dst = daddr,
.fl4_src = inet->inet_saddr,
.fl4_tos = RT_CONN_FLAGS(sk),
.proto = sk->sk_protocol,
.flags = inet_sk_flowi_flags(sk),
.fl_ip_sport = inet->inet_sport,
.fl_ip_dport = inet->inet_dport,
};
security_sk_classify_flow(sk, &fl);
rt = ip_route_output_flow(sock_net(sk), &fl, sk);
}
rt = ip_route_output_ports(sock_net(sk), sk, daddr, inet->inet_saddr,
inet->inet_dport, inet->inet_sport,
sk->sk_protocol, RT_CONN_FLAGS(sk),
sk->sk_bound_dev_if);
if (!IS_ERR(rt)) {
err = 0;
sk_setup_caps(sk, &rt->dst);
......
......@@ -433,14 +433,12 @@ static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip)
static int arp_filter(__be32 sip, __be32 tip, struct net_device *dev)
{
struct flowi fl = { .fl4_dst = sip,
.fl4_src = tip };
struct rtable *rt;
int flag = 0;
/*unsigned long now; */
struct net *net = dev_net(dev);
rt = ip_route_output_key(net, &fl);
rt = ip_route_output(net, sip, tip, 0, 0);
if (IS_ERR(rt))
return 1;
if (rt->dst.dev != dev) {
......@@ -1062,9 +1060,7 @@ static int arp_req_set(struct net *net, struct arpreq *r,
if (r->arp_flags & ATF_PERM)
r->arp_flags |= ATF_COM;
if (dev == NULL) {
struct flowi fl = { .fl4_dst = ip,
.fl4_tos = RTO_ONLINK };
struct rtable *rt = ip_route_output_key(net, &fl);
struct rtable *rt = ip_route_output(net, ip, 0, RTO_ONLINK, 0);
if (IS_ERR(rt))
return PTR_ERR(rt);
......@@ -1185,9 +1181,7 @@ static int arp_req_delete(struct net *net, struct arpreq *r,
ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr;
if (dev == NULL) {
struct flowi fl = { .fl4_dst = ip,
.fl4_tos = RTO_ONLINK };
struct rtable *rt = ip_route_output_key(net, &fl);
struct rtable *rt = ip_route_output(net, ip, 0, RTO_ONLINK, 0);
if (IS_ERR(rt))
return PTR_ERR(rt);
dev = rt->dst.dev;
......
......@@ -321,15 +321,12 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
}
igmp_skb_size(skb) = size;
{
struct flowi fl = { .oif = dev->ifindex,
.fl4_dst = IGMPV3_ALL_MCR,
.proto = IPPROTO_IGMP };
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt)) {
kfree_skb(skb);
return NULL;
}
rt = ip_route_output_ports(net, NULL, IGMPV3_ALL_MCR, 0,
0, 0,
IPPROTO_IGMP, 0, dev->ifindex);
if (IS_ERR(rt)) {
kfree_skb(skb);
return NULL;
}
if (rt->rt_src == 0) {
kfree_skb(skb);
......@@ -667,14 +664,12 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
else
dst = group;
{
struct flowi fl = { .oif = dev->ifindex,
.fl4_dst = dst,
.proto = IPPROTO_IGMP };
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt))
return -1;
}
rt = ip_route_output_ports(net, NULL, dst, 0,
0, 0,
IPPROTO_IGMP, 0, dev->ifindex);
if (IS_ERR(rt))
return -1;
if (rt->rt_src == 0) {
ip_rt_put(rt);
return -1;
......@@ -1441,7 +1436,6 @@ void ip_mc_destroy_dev(struct in_device *in_dev)
/* RTNL is locked */
static struct in_device *ip_mc_find_dev(struct net *net, struct ip_mreqn *imr)
{
struct flowi fl = { .fl4_dst = imr->imr_multiaddr.s_addr };
struct net_device *dev = NULL;
struct in_device *idev = NULL;
......@@ -1456,7 +1450,9 @@ static struct in_device *ip_mc_find_dev(struct net *net, struct ip_mreqn *imr)
}
if (!dev) {
struct rtable *rt = ip_route_output_key(net, &fl);
struct rtable *rt = ip_route_output(net,
imr->imr_multiaddr.s_addr,
0, 0, 0);
if (!IS_ERR(rt)) {
dev = rt->dst.dev;
ip_rt_put(rt);
......
......@@ -769,20 +769,12 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
tos = ipv6_get_dsfield((struct ipv6hdr *)old_iph);
}
{
struct flowi fl = {
.oif = tunnel->parms.link,
.fl4_dst = dst,
.fl4_src = tiph->saddr,
.fl4_tos = RT_TOS(tos),
.proto = IPPROTO_GRE,
.fl_gre_key = tunnel->parms.o_key
};
rt = ip_route_output_key(dev_net(dev), &fl);
if (IS_ERR(rt)) {
dev->stats.tx_carrier_errors++;
goto tx_error;
}
rt = ip_route_output_gre(dev_net(dev), dst, tiph->saddr,
tunnel->parms.o_key, RT_TOS(tos),
tunnel->parms.link);
if (IS_ERR(rt)) {
dev->stats.tx_carrier_errors++;
goto tx_error;
}
tdev = rt->dst.dev;
......@@ -946,15 +938,11 @@ static int ipgre_tunnel_bind_dev(struct net_device *dev)
/* Guess output device to choose reasonable mtu and needed_headroom */
if (iph->daddr) {
struct flowi fl = {
.oif = tunnel->parms.link,
.fl4_dst = iph->daddr,
.fl4_src = iph->saddr,
.fl4_tos = RT_TOS(iph->tos),
.proto = IPPROTO_GRE,
.fl_gre_key = tunnel->parms.o_key
};
struct rtable *rt = ip_route_output_key(dev_net(dev), &fl);
struct rtable *rt = ip_route_output_gre(dev_net(dev),
iph->daddr, iph->saddr,
tunnel->parms.o_key,
RT_TOS(iph->tos),
tunnel->parms.link);
if (!IS_ERR(rt)) {
tdev = rt->dst.dev;
......@@ -1208,15 +1196,12 @@ static int ipgre_open(struct net_device *dev)
struct ip_tunnel *t = netdev_priv(dev);
if (ipv4_is_multicast(t->parms.iph.daddr)) {
struct flowi fl = {
.oif = t->parms.link,
.fl4_dst = t->parms.iph.daddr,
.fl4_src = t->parms.iph.saddr,
.fl4_tos = RT_TOS(t->parms.iph.tos),
.proto = IPPROTO_GRE,
.fl_gre_key = t->parms.o_key
};
struct rtable *rt = ip_route_output_key(dev_net(dev), &fl);
struct rtable *rt = ip_route_output_gre(dev_net(dev),
t->parms.iph.daddr,
t->parms.iph.saddr,
t->parms.o_key,
RT_TOS(t->parms.iph.tos),
t->parms.link);
if (IS_ERR(rt))
return -EADDRNOTAVAIL;
......
......@@ -339,26 +339,19 @@ int ip_queue_xmit(struct sk_buff *skb)
if(opt && opt->srr)
daddr = opt->faddr;
{
struct flowi fl = { .oif = sk->sk_bound_dev_if,
.mark = sk->sk_mark,
.fl4_dst = daddr,
.fl4_src = inet->inet_saddr,
.fl4_tos = RT_CONN_FLAGS(sk),
.proto = sk->sk_protocol,
.flags = inet_sk_flowi_flags(sk),
.fl_ip_sport = inet->inet_sport,
.fl_ip_dport = inet->inet_dport };
/* If this fails, retransmit mechanism of transport layer will
* keep trying until route appears or the connection times
* itself out.
*/
security_sk_classify_flow(sk, &fl);
rt = ip_route_output_flow(sock_net(sk), &fl, sk);
if (IS_ERR(rt))
goto no_route;
}
/* If this fails, retransmit mechanism of transport layer will
* keep trying until route appears or the connection times
* itself out.
*/
rt = ip_route_output_ports(sock_net(sk), sk,
daddr, inet->inet_saddr,
inet->inet_dport,
inet->inet_sport,
sk->sk_protocol,
RT_CONN_FLAGS(sk),
sk->sk_bound_dev_if);
if (IS_ERR(rt))
goto no_route;
sk_setup_caps(sk, &rt->dst);
}
skb_dst_set_noref(skb, &rt->dst);
......
......@@ -460,20 +460,14 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
goto tx_error_icmp;
}
{
struct flowi fl = {
.oif = tunnel->parms.link,
.fl4_dst = dst,
.fl4_src= tiph->saddr,
.fl4_tos = RT_TOS(tos),
.proto = IPPROTO_IPIP
};
rt = ip_route_output_key(dev_net(dev), &fl);
if (IS_ERR(rt)) {
dev->stats.tx_carrier_errors++;
goto tx_error_icmp;
}
rt = ip_route_output_ports(dev_net(dev), NULL,
dst, tiph->saddr,
0, 0,
IPPROTO_IPIP, RT_TOS(tos),
tunnel->parms.link);
if (IS_ERR(rt)) {
dev->stats.tx_carrier_errors++;
goto tx_error_icmp;
}
tdev = rt->dst.dev;
......@@ -584,14 +578,12 @@ static void ipip_tunnel_bind_dev(struct net_device *dev)
iph = &tunnel->parms.iph;
if (iph->daddr) {
struct flowi fl = {
.oif = tunnel->parms.link,
.fl4_dst = iph->daddr,
.fl4_src = iph->saddr,
.fl4_tos = RT_TOS(iph->tos),
.proto = IPPROTO_IPIP
};
struct rtable *rt = ip_route_output_key(dev_net(dev), &fl);
struct rtable *rt = ip_route_output_ports(dev_net(dev), NULL,
iph->daddr, iph->saddr,
0, 0,
IPPROTO_IPIP,
RT_TOS(iph->tos),
tunnel->parms.link);
if (!IS_ERR(rt)) {
tdev = rt->dst.dev;
......
......@@ -1611,25 +1611,19 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
#endif
if (vif->flags & VIFF_TUNNEL) {
struct flowi fl = {
.oif = vif->link,
.fl4_dst = vif->remote,
.fl4_src = vif->local,
.fl4_tos = RT_TOS(iph->tos),
.proto = IPPROTO_IPIP
};
rt = ip_route_output_key(net, &fl);
rt = ip_route_output_ports(net, NULL,
vif->remote, vif->local,
0, 0,
IPPROTO_IPIP,
RT_TOS(iph->tos), vif->link);
if (IS_ERR(rt))
goto out_free;
encap = sizeof(struct iphdr);
} else {
struct flowi fl = {
.oif = vif->link,
.fl4_dst = iph->daddr,
.fl4_tos = RT_TOS(iph->tos),
.proto = IPPROTO_IPIP
};
rt = ip_route_output_key(net, &fl);
rt = ip_route_output_ports(net, NULL, iph->daddr, 0,
0, 0,
IPPROTO_IPIP,
RT_TOS(iph->tos), vif->link);
if (IS_ERR(rt))
goto out_free;
}
......
......@@ -536,7 +536,6 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
int err;
struct sk_buff *skb2;
struct iphdr *eiph;
struct flowi fl;