renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-15 08:44:14 +08:00
Code

ipv4: Make output route lookup return rtable directly.

Browse Source 
Instead of on the stack.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2011-03-02 14:31:35 -08:00
parent 452edd598f
commit b23dd4fe42
36 changed files with 267 additions and 224 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/infiniband/core/addr.c
View File

@ -193,10 +193,11 @@ static int addr4_resolve(struct sockaddr_in *src_in,
fl.nl_u.ip4_u.saddr = src_ip;
fl.oif = addr->bound_dev_if;
ret = ip_route_output_key(&init_net, &rt, &fl);
if (ret)
rt = ip_route_output_key(&init_net, &fl);
if (IS_ERR(rt)) {
ret = PTR_ERR(rt);
goto out;
}
src_in->sin_family = AF_INET;
src_in->sin_addr.s_addr = rt->rt_src;

3
drivers/infiniband/hw/cxgb3/iwch_cm.c
View File

@ -354,7 +354,8 @@ static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip,
}
};
if (ip_route_output_flow(&init_net, &rt, &fl, NULL))
rt = ip_route_output_flow(&init_net, &fl, NULL);
if (IS_ERR(rt))
return NULL;
return rt;
}

3
drivers/infiniband/hw/cxgb4/cm.c
View File

@ -331,7 +331,8 @@ static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip,
}
};
if (ip_route_output_flow(&init_net, &rt, &fl, NULL))
rt = ip_route_output_flow(&init_net, &fl, NULL);
if (IS_ERR(rt))
return NULL;
return rt;
}

3
drivers/infiniband/hw/nes/nes_cm.c
View File

@ -1112,7 +1112,8 @@ static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpi
memset(&fl, 0, sizeof fl);
fl.nl_u.ip4_u.daddr = htonl(dst_ip);
if (ip_route_output_key(&init_net, &rt, &fl)) {
rt = ip_route_output_key(&init_net, &fl);
if (IS_ERR(rt)) {
printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
__func__, dst_ip);
return rc;

6
drivers/net/bonding/bond_main.c
View File

@ -2681,7 +2681,7 @@ static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_
static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
{
int i, vlan_id, rv;
int i, vlan_id;
__be32 *targets = bond->params.arp_targets;
struct vlan_entry *vlan;
struct net_device *vlan_dev;
@ -2708,8 +2708,8 @@ static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
fl.fl4_dst = targets[i];
fl.fl4_tos = RTO_ONLINK;
rv = ip_route_output_key(dev_net(bond->dev), &rt, &fl);
if (rv) {
rt = ip_route_output_key(dev_net(bond->dev), &fl);
if (IS_ERR(rt)) {
if (net_ratelimit()) {
pr_warning("%s: no route to arp_ip_target %pI4\n",
bond->dev->name, &fl.fl4_dst);

7
drivers/net/cnic.c
View File

@ -3397,9 +3397,12 @@ static int cnic_get_v4_route(struct sockaddr_in *dst_addr,
memset(&fl, 0, sizeof(fl));
fl.nl_u.ip4_u.daddr = dst_addr->sin_addr.s_addr;
err = ip_route_output_key(&init_net, &rt, &fl);
if (!err)
rt = ip_route_output_key(&init_net, &fl);
err = 0;
if (!IS_ERR(rt))
*dst = &rt->dst;
else
err = PTR_ERR(rt);
return err;
#else
return -ENETUNREACH;

8
drivers/net/pptp.c
View File

@ -175,7 +175,6 @@ static int pptp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
struct pptp_opt *opt = &po->proto.pptp;
struct pptp_gre_header *hdr;
unsigned int header_len = sizeof(*hdr);
int err = 0;
int islcp;
int len;
unsigned char *data;
@ -198,8 +197,8 @@ static int pptp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
.saddr = opt->src_addr.sin_addr.s_addr,
.tos = RT_TOS(0) } },
.proto = IPPROTO_GRE };
err = ip_route_output_key(&init_net, &rt, &fl);
if (err)
rt = ip_route_output_key(&init_net, &fl);
if (IS_ERR(rt))
goto tx_error;
}
tdev = rt->dst.dev;
@ -477,7 +476,8 @@ static int pptp_connect(struct socket *sock, struct sockaddr *uservaddr,
.tos = RT_CONN_FLAGS(sk) } },
.proto = IPPROTO_GRE };
security_sk_classify_flow(sk, &fl);
if (ip_route_output_key(&init_net, &rt, &fl)) {
rt = ip_route_output_key(&init_net, &fl);
if (IS_ERR(rt)) {
error = -EHOSTUNREACH;
goto end;
}

3
drivers/scsi/cxgbi/libcxgbi.c
View File

@ -470,7 +470,8 @@ static struct rtable *find_route_ipv4(__be32 saddr, __be32 daddr,
}
};
if (ip_route_output_flow(&init_net, &rt, &fl, NULL))
rt = ip_route_output_flow(&init_net, &fl, NULL);
if (IS_ERR(rt))
return NULL;
return rt;

58
include/net/route.h
View File

@ -118,9 +118,10 @@ extern void ip_rt_redirect(__be32 old_gw, __be32 dst, __be32 new_gw,
__be32 src, struct net_device *dev);
extern void rt_cache_flush(struct net *net, int how);
extern void rt_cache_flush_batch(struct net *net);
extern int __ip_route_output_key(struct net *, struct rtable **, const struct flowi *flp);
extern int ip_route_output_key(struct net *, struct rtable **, struct flowi *flp);
extern int ip_route_output_flow(struct net *, struct rtable **rp, struct flowi *flp, struct sock *sk);
extern struct rtable *__ip_route_output_key(struct net *, const struct flowi *flp);
extern struct rtable *ip_route_output_key(struct net *, struct flowi *flp);
extern struct rtable *ip_route_output_flow(struct net *, struct flowi *flp,
struct sock *sk);
extern struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_orig);
extern int ip_route_input_common(struct sk_buff *skb, __be32 dst, __be32 src,
@ -166,10 +167,10 @@ static inline char rt_tos2priority(u8 tos)
return ip_tos2prio[IPTOS_TOS(tos)>>1];
}
static inline int ip_route_connect(struct rtable **rp, __be32 dst,
__be32 src, u32 tos, int oif, u8 protocol,
__be16 sport, __be16 dport, struct sock *sk,
bool can_sleep)
static inline struct rtable *ip_route_connect(__be32 dst, __be32 src, u32 tos,
int oif, u8 protocol,
__be16 sport, __be16 dport,
struct sock *sk, bool can_sleep)
{
struct flowi fl = { .oif = oif,
.mark = sk->sk_mark,
@ -179,8 +180,8 @@ static inline int ip_route_connect(struct rtable **rp, __be32 dst,
.proto = protocol,
.fl_ip_sport = sport,
.fl_ip_dport = dport };
int err;
struct net *net = sock_net(sk);
struct rtable *rt;
if (inet_sk(sk)->transparent)
fl.flags |= FLOWI_FLAG_ANYSRC;
@ -190,29 +191,29 @@ static inline int ip_route_connect(struct rtable **rp, __be32 dst,
fl.flags |= FLOWI_FLAG_CAN_SLEEP;
if (!dst || !src) {
err = __ip_route_output_key(net, rp, &fl);
if (err)
return err;
fl.fl4_dst = (*rp)->rt_dst;
fl.fl4_src = (*rp)->rt_src;
ip_rt_put(*rp);
*rp = NULL;
rt = __ip_route_output_key(net, &fl);
if (IS_ERR(rt))
return rt;
fl.fl4_dst = rt->rt_dst;
fl.fl4_src = rt->rt_src;
ip_rt_put(rt);
}
security_sk_classify_flow(sk, &fl);
return ip_route_output_flow(net, rp, &fl, sk);
return ip_route_output_flow(net, &fl, sk);
}
static inline int ip_route_newports(struct rtable **rp, u8 protocol,
__be16 orig_sport, __be16 orig_dport,
__be16 sport, __be16 dport, struct sock *sk)
static inline struct rtable *ip_route_newports(struct rtable *rt,
u8 protocol, __be16 orig_sport,
__be16 orig_dport, __be16 sport,
__be16 dport, struct sock *sk)
{
if (sport != orig_sport || dport != orig_dport) {
struct flowi fl = { .oif = (*rp)->fl.oif,
.mark = (*rp)->fl.mark,
.fl4_dst = (*rp)->fl.fl4_dst,
.fl4_src = (*rp)->fl.fl4_src,
.fl4_tos = (*rp)->fl.fl4_tos,
.proto = (*rp)->fl.proto,
struct flowi fl = { .oif = rt->fl.oif,
.mark = rt->fl.mark,
.fl4_dst = rt->fl.fl4_dst,
.fl4_src = rt->fl.fl4_src,
.fl4_tos = rt->fl.fl4_tos,
.proto = rt->fl.proto,
.fl_ip_sport = sport,
.fl_ip_dport = dport };
@ -220,12 +221,11 @@ static inline int ip_route_newports(struct rtable **rp, u8 protocol,
fl.flags |= FLOWI_FLAG_ANYSRC;
if (protocol == IPPROTO_TCP)
fl.flags |= FLOWI_FLAG_PRECOW_METRICS;
ip_rt_put(*rp);
*rp = NULL;
ip_rt_put(rt);
security_sk_classify_flow(sk, &fl);
return ip_route_output_flow(sock_net(sk), rp, &fl, sk);
return ip_route_output_flow(sock_net(sk), &fl, sk);
}
return 0;
return rt;
}
extern void rt_bind_peer(struct rtable *rt, int create);

6
net/atm/clip.c
View File

@ -520,9 +520,9 @@ static int clip_setentry(struct atm_vcc *vcc, __be32 ip)
unlink_clip_vcc(clip_vcc);
return 0;
}
error = ip_route_output_key(&init_net, &rt, &fl);
if (error)
return error;
rt = ip_route_output_key(&init_net, &fl);
if (IS_ERR(rt))
return PTR_ERR(rt);
neigh = __neigh_lookup(&clip_tbl, &ip, rt->dst.dev, 1);
ip_rt_put(rt);
if (!neigh)

9
net/bridge/br_netfilter.c
View File

@ -428,14 +428,15 @@ static int br_nf_pre_routing_finish(struct sk_buff *skb)
if (err != -EHOSTUNREACH || !in_dev || IN_DEV_FORWARD(in_dev))
goto free_skb;
if (!ip_route_output_key(dev_net(dev), &rt, &fl)) {
rt = ip_route_output_key(dev_net(dev), &fl);
if (!IS_ERR(rt)) {
/* - Bridged-and-DNAT'ed traffic doesn't
* require ip_forwarding. */
if (((struct dst_entry *)rt)->dev == dev) {
skb_dst_set(skb, (struct dst_entry *)rt);
if (rt->dst.dev == dev) {
skb_dst_set(skb, &rt->dst);
goto bridged_dnat;
}
dst_release((struct dst_entry *)rt);
ip_rt_put(rt);
}
free_skb:
kfree_skb(skb);

27
net/dccp/ipv4.c
View File

@ -46,7 +46,6 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
__be16 orig_sport, orig_dport;
struct rtable *rt;
__be32 daddr, nexthop;
int tmp;
int err;
dp->dccps_role = DCCP_ROLE_CLIENT;
@ -66,12 +65,12 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
orig_sport = inet->inet_sport;
orig_dport = usin->sin_port;
tmp = ip_route_connect(&rt, nexthop, inet->inet_saddr,
RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
IPPROTO_DCCP,
orig_sport, orig_dport, sk, true);
if (tmp < 0)
return tmp;
rt = ip_route_connect(nexthop, inet->inet_saddr,
RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
IPPROTO_DCCP,
orig_sport, orig_dport, sk, true);
if (IS_ERR(rt))
return PTR_ERR(rt);
if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) {
ip_rt_put(rt);
@ -102,12 +101,13 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
if (err != 0)
goto failure;
err = ip_route_newports(&rt, IPPROTO_DCCP,
orig_sport, orig_dport,
inet->inet_sport, inet->inet_dport, sk);
if (err != 0)
rt = ip_route_newports(rt, IPPROTO_DCCP,
orig_sport, orig_dport,
inet->inet_sport, inet->inet_dport, sk);
if (IS_ERR(rt)) {
rt = NULL;
goto failure;
}
/* OK, now commit destination to socket. */
sk_setup_caps(sk, &rt->dst);
@ -475,7 +475,8 @@ static struct dst_entry* dccp_v4_route_skb(struct net *net, struct sock *sk,
};
security_skb_classify_flow(skb, &fl);
if (ip_route_output_flow(net, &rt, &fl, sk)) {
rt = ip_route_output_flow(net, &fl, sk);
if (IS_ERR(rt)) {
IP_INC_STATS_BH(net, IPSTATS_MIB_OUTNOROUTES);
return NULL;
}

30
net/ipv4/af_inet.c
View File

@ -1101,23 +1101,20 @@ int sysctl_ip_dynaddr __read_mostly;
static int inet_sk_reselect_saddr(struct sock *sk)
{
struct inet_sock *inet = inet_sk(sk);
int err;
struct rtable *rt;
__be32 old_saddr = inet->inet_saddr;
__be32 new_saddr;
__be32 daddr = inet->inet_daddr;
struct rtable *rt;
__be32 new_saddr;
if (inet->opt && inet->opt->srr)
daddr = inet->opt->faddr;
/* Query new route. */
err = ip_route_connect(&rt, daddr, 0,
RT_CONN_FLAGS(sk),
sk->sk_bound_dev_if,
sk->sk_protocol,
inet->inet_sport, inet->inet_dport, sk, false);
if (err)
return err;
rt = ip_route_connect(daddr, 0, RT_CONN_FLAGS(sk),
sk->sk_bound_dev_if, sk->sk_protocol,
inet->inet_sport, inet->inet_dport, sk, false);
if (IS_ERR(rt))
return PTR_ERR(rt);
sk_setup_caps(sk, &rt->dst);
@ -1160,7 +1157,7 @@ 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,
@ -1174,11 +1171,14 @@ int inet_sk_rebuild_header(struct sock *sk)
};
security_sk_classify_flow(sk, &fl);
err = ip_route_output_flow(sock_net(sk), &rt, &fl, sk);
}
if (!err)
rt = ip_route_output_flow(sock_net(sk), &fl, sk);
}
if (!IS_ERR(rt)) {
err = 0;
sk_setup_caps(sk, &rt->dst);
else {
} else {
err = PTR_ERR(rt);
/* Routing failed... */
sk->sk_route_caps = 0;
/*

19
net/ipv4/arp.c
View File

@ -440,7 +440,8 @@ static int arp_filter(__be32 sip, __be32 tip, struct net_device *dev)
/*unsigned long now; */
struct net *net = dev_net(dev);
if (ip_route_output_key(net, &rt, &fl) < 0)
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt))
return 1;
if (rt->dst.dev != dev) {
NET_INC_STATS_BH(net, LINUX_MIB_ARPFILTER);
@ -1063,10 +1064,10 @@ static int arp_req_set(struct net *net, struct arpreq *r,
if (dev == NULL) {
struct flowi fl = { .fl4_dst = ip,
.fl4_tos = RTO_ONLINK };
struct rtable *rt;
err = ip_route_output_key(net, &rt, &fl);
if (err != 0)
return err;
struct rtable *rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt))
return PTR_ERR(rt);
dev = rt->dst.dev;
ip_rt_put(rt);
if (!dev)
@ -1177,7 +1178,6 @@ static int arp_req_delete_public(struct net *net, struct arpreq *r,
static int arp_req_delete(struct net *net, struct arpreq *r,
struct net_device *dev)
{
int err;
__be32 ip;
if (r->arp_flags & ATF_PUBL)
@ -1187,10 +1187,9 @@ static int arp_req_delete(struct net *net, struct arpreq *r,
if (dev == NULL) {
struct flowi fl = { .fl4_dst = ip,
.fl4_tos = RTO_ONLINK };
struct rtable *rt;
err = ip_route_output_key(net, &rt, &fl);
if (err != 0)
return err;
struct rtable *rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt))
return PTR_ERR(rt);
dev = rt->dst.dev;
ip_rt_put(rt);
if (!dev)

11
net/ipv4/datagram.c
View File

@ -46,11 +46,12 @@ int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
if (!saddr)
saddr = inet->mc_addr;
}
err = ip_route_connect(&rt, usin->sin_addr.s_addr, saddr,
RT_CONN_FLAGS(sk), oif,
sk->sk_protocol,
inet->inet_sport, usin->sin_port, sk, true);
if (err) {
rt = ip_route_connect(usin->sin_addr.s_addr, saddr,
RT_CONN_FLAGS(sk), oif,
sk->sk_protocol,
inet->inet_sport, usin->sin_port, sk, true);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
if (err == -ENETUNREACH)
IP_INC_STATS_BH(sock_net(sk), IPSTATS_MIB_OUTNOROUTES);
return err;

19
net/ipv4/icmp.c
View File

@ -358,7 +358,8 @@ static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb)
.fl4_tos = RT_TOS(ip_hdr(skb)->tos),
.proto = IPPROTO_ICMP };
security_skb_classify_flow(skb, &fl);
if (ip_route_output_key(net, &rt, &fl))
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt))
goto out_unlock;
}
if (icmpv4_xrlim_allow(net, rt, icmp_param->data.icmph.type,
@ -388,9 +389,9 @@ static struct rtable *icmp_route_lookup(struct net *net, struct sk_buff *skb_in,
int err;
security_skb_classify_flow(skb_in, &fl);
err = __ip_route_output_key(net, &rt, &fl);
if (err)
return ERR_PTR(err);
rt = __ip_route_output_key(net, &fl);
if (IS_ERR(rt))
return rt;
/* No need to clone since we're just using its address. */
rt2 = rt;
@ -412,15 +413,19 @@ static struct rtable *icmp_route_lookup(struct net *net, struct sk_buff *skb_in,
goto relookup_failed;
if (inet_addr_type(net, fl.fl4_src) == RTN_LOCAL) {
err = __ip_route_output_key(net, &rt2, &fl);
rt2 = __ip_route_output_key(net, &fl);
if (IS_ERR(rt2))
err = PTR_ERR(rt2);
} else {
struct flowi fl2 = {};
unsigned long orefdst;
fl2.fl4_dst = fl.fl4_src;
err = ip_route_output_key(net, &rt2, &fl2);
if (err)
rt2 = ip_route_output_key(net, &fl2);
if (IS_ERR(rt2)) {
err = PTR_ERR(rt2);
goto relookup_failed;
}
/* Ugh! */
orefdst = skb_in->_skb_refdst; /* save old refdst */
err = ip_route_input(skb_in, fl.fl4_dst, fl.fl4_src,

16
net/ipv4/igmp.c
View File

@ -325,7 +325,8 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
struct flowi fl = { .oif = dev->ifindex,
.fl4_dst = IGMPV3_ALL_MCR,
.proto = IPPROTO_IGMP };
if (ip_route_output_key(net, &rt, &fl)) {
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt)) {
kfree_skb(skb);
return NULL;
}
@ -670,7 +671,8 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
struct flowi fl = { .oif = dev->ifindex,
.fl4_dst = dst,
.proto = IPPROTO_IGMP };
if (ip_route_output_key(net, &rt, &fl))
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt))
return -1;
}
if (rt->rt_src == 0) {
@ -1440,7 +1442,6 @@ void ip_mc_destroy_dev(struct in_device *in_dev)
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 rtable *rt;
struct net_device *dev = NULL;
struct in_device *idev = NULL;
@ -1454,9 +1455,12 @@ static struct in_device *ip_mc_find_dev(struct net *net, struct ip_mreqn *imr)
return NULL;
}
if (!dev && !ip_route_output_key(net, &rt, &fl)) {
dev = rt->dst.dev;
ip_rt_put(rt);
if (!dev) {
struct rtable *rt = ip_route_output_key(net, &fl);
if (!IS_ERR(rt)) {
dev = rt->dst.dev;
ip_rt_put(rt);
}
}
if (dev) {
imr->imr_ifindex = dev->ifindex;

3
net/ipv4/inet_connection_sock.c
View File

@ -369,7 +369,8 @@ struct dst_entry *inet_csk_route_req(struct sock *sk,
struct net *net = sock_net(sk);
security_req_classify_flow(req, &fl);
if (ip_route_output_flow(net, &rt, &fl, sk))
rt = ip_route_output_flow(net, &fl, sk);
if (IS_ERR(rt))
goto no_route;
if (opt && opt->is_strictroute && rt->rt_dst != rt->rt_gateway)
goto route_err;

11
net/ipv4/ip_gre.c
View File

@ -778,7 +778,8 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
.proto = IPPROTO_GRE,
.fl_gre_key = tunnel->parms.o_key
};
if (ip_route_output_key(dev_net(dev), &rt, &fl)) {
rt = ip_route_output_key(dev_net(dev), &fl);
if (IS_ERR(rt)) {
dev->stats.tx_carrier_errors++;
goto tx_error;
}
@ -953,9 +954,9 @@ static int ipgre_tunnel_bind_dev(struct net_device *dev)
.proto = IPPROTO_GRE,
.fl_gre_key = tunnel->parms.o_key
};
struct rtable *rt;
struct rtable *rt = ip_route_output_key(dev_net(dev), &fl);
if (!ip_route_output_key(dev_net(dev), &rt, &fl)) {
if (!IS_ERR(rt)) {
tdev = rt->dst.dev;
ip_rt_put(rt);
}
@ -1215,9 +1216,9 @@ static int ipgre_open(struct net_device *dev)
.proto = IPPROTO_GRE,
.fl_gre_key = t->parms.o_key
};
struct rtable *rt;
struct rtable *rt = ip_route_output_key(dev_net(dev), &fl);
if (ip_route_output_key(dev_net(dev), &rt, &fl))
if (IS_ERR(rt))
return -EADDRNOTAVAIL;
dev = rt->dst.dev;
ip_rt_put(rt);

6
net/ipv4/ip_output.c
View File

@ -355,7 +355,8 @@ int ip_queue_xmit(struct sk_buff *skb)
* itself out.
*/
security_sk_classify_flow(sk, &fl);
if (ip_route_output_flow(sock_net(sk), &rt, &fl, sk))
rt = ip_route_output_flow(sock_net(sk), &fl, sk);
if (IS_ERR(rt))
goto no_route;
}
sk_setup_caps(sk, &rt->dst);
@ -1489,7 +1490,8 @@ void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *ar
.proto = sk->sk_protocol,
.flags = ip_reply_arg_flowi_flags(arg) };
security_skb_classify_flow(skb, &fl);
if (ip_route_output_key(sock_net(sk), &rt, &fl))
rt = ip_route_output_key(sock_net(sk), &fl);
if (IS_ERR(rt))
return;
}

7
net/ipv4/ipip.c
View File

@ -469,7 +469,8 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
.proto = IPPROTO_IPIP
};
if (ip_route_output_key(dev_net(dev), &rt, &fl)) {
rt = ip_route_output_key(dev_net(dev), &fl);
if (IS_ERR(rt)) {
dev->stats.tx_carrier_errors++;
goto tx_error_icmp;
}
@ -590,9 +591,9 @@ static void ipip_tunnel_bind_dev(struct net_device *dev)
.fl4_tos = RT_TOS(iph->tos),
.proto = IPPROTO_IPIP
};
struct rtable *rt;
struct rtable *rt = ip_route_output_key(dev_net(dev), &fl);
if (!ip_route_output_key(dev_net(dev), &rt, &fl)) {
if (!IS_ERR(rt)) {
tdev = rt->dst.dev;
ip_rt_put(rt);
}

8
net/ipv4/ipmr.c
View File

@ -1618,8 +1618,8 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
.fl4_tos = RT_TOS(iph->tos),
.proto = IPPROTO_IPIP
};
if (ip_route_output_key(net, &rt, &fl))
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt))
goto out_free;
encap = sizeof(struct iphdr);
} else {
@ -1629,8 +1629,8 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
.fl4_tos = RT_TOS(iph->tos),
.proto = IPPROTO_IPIP
};
if (ip_route_output_key(net, &rt, &fl))
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt))
goto out_free;
}

12
net/ipv4/netfilter.c
View File

@ -38,7 +38,8 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type)
fl.oif = skb->sk ? skb->sk->sk_bound_dev_if : 0;
fl.mark = skb->mark;
fl.flags = skb->sk ? inet_sk_flowi_flags(skb->sk) : 0;
if (ip_route_output_key(net, &rt, &fl) != 0)
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt))
return -1;
/* Drop old route. */
@ -48,7 +49,8 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type)
/* non-local src, find valid iif to satisfy
* rp-filter when calling ip_route_input. */
fl.fl4_dst = iph->saddr;
if (ip_route_output_key(net, &rt, &fl) != 0)
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt))
return -1;
orefdst = skb->_skb_refdst;
@ -221,7 +223,11 @@ static __sum16 nf_ip_checksum_partial(struct sk_buff *skb, unsigned int hook,
static int nf_ip_route(struct dst_entry **dst, struct flowi *fl)
{
return ip_route_output_key(&init_net, (struct rtable **)dst, fl);
struct rtable *rt = ip_route_output_key(&init_net, fl);
if (IS_ERR(rt))
return PTR_ERR(rt);
*dst = &rt->dst;
return 0;
}
static const struct nf_afinfo nf_ip_afinfo = {

8
net/ipv4/raw.c
View File

@ -564,10 +564,12 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
}
security_sk_classify_flow(sk, &fl);
err = ip_route_output_flow(sock_net(sk), &rt, &fl, sk);
rt = ip_route_output_flow(sock_net(sk), &fl, sk);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
goto done;
}
}
if (err)
goto done;
err = -EACCES;
if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))

100
net/ipv4/route.c
View File

@ -1014,8 +1014,8 @@ static int slow_chain_length(const struct rtable *head)
return length >> FRACT_BITS;
}
static int rt_intern_hash(unsigned hash, struct rtable *rt,
struct rtable **rp, struct sk_buff *skb, int ifindex)
static struct rtable *rt_intern_hash(unsigned hash, struct rtable *rt,
struct sk_buff *skb, int ifindex)
{
struct rtable *rth, *cand;
struct rtable __rcu **rthp, **candp;
@ -1056,7 +1056,7 @@ restart:
printk(KERN_WARNING
"Neighbour table failure & not caching routes.\n");
ip_rt_put(rt);
return err;
return ERR_PTR(err);
}
}
@ -1093,11 +1093,9 @@ restart:
spin_unlock_bh(rt_hash_lock_addr(hash));
rt_drop(rt);
if (rp)
*rp = rth;
else
if (skb)
skb_dst_set(skb, &rth->dst);
return 0;
return rth;
}
if (!atomic_read(&rth->dst.__refcnt)) {
@ -1154,7 +1152,7 @@ restart:
if (err != -ENOBUFS) {
rt_drop(rt);
return err;
return ERR_PTR(err);
}
/* Neighbour tables are full and nothing
@ -1175,7 +1173,7 @@ restart:
if (net_ratelimit())
printk(KERN_WARNING "ipv4: Neighbour table overflow.\n");
rt_drop(rt);
return -ENOBUFS;
return ERR_PTR(-ENOBUFS);
}
}
@ -1201,11 +1199,9 @@ restart:
spin_unlock_bh(rt_hash_lock_addr(hash));
skip_hashing:
if (rp)
*rp = rt;
else
if (skb)
skb_dst_set(skb, &rt->dst);
return 0;
return rt;
}
static atomic_t __rt_peer_genid = ATOMIC_INIT(0);
@ -1896,7 +1892,10 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
RT_CACHE_STAT_INC(in_slow_mc);
hash = rt_hash(daddr, saddr, dev->ifindex, rt_genid(dev_net(dev)));
return rt_intern_hash(hash, rth, NULL, skb, dev->ifindex);
rth = rt_intern_hash(hash, rth, skb, dev->ifindex);
err = 0;
if (IS_ERR(rth))
err = PTR_ERR(rth);
e_nobufs:
return -ENOBUFS;
@ -2051,7 +2050,10 @@ static int ip_mkroute_input(struct sk_buff *skb,
/* put it into the cache */
hash = rt_hash(daddr, saddr, fl->iif,
rt_genid(dev_net(rth->dst.dev)));
return rt_intern_hash(hash, rth, NULL, skb, fl->iif);
rth = rt_intern_hash(hash, rth, skb, fl->iif);
if (IS_ERR(rth))
return PTR_ERR(rth);
return 0;
}
/*
@ -2194,7 +2196,10 @@ local_input:
}
rth->rt_type = res.type;
hash = rt_hash(daddr, saddr, fl.iif, rt_genid(net));
err = rt_intern_hash(hash, rth, NULL, skb, fl.iif);
rth = rt_intern_hash(hash, rth, skb, fl.iif);
err = 0;
if (IS_ERR(rth))
err = PTR_ERR(rth);
goto out;
no_route:
@ -2422,8 +2427,8 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
* called with rcu_read_lock();
*/
static int ip_route_output_slow(struct net *net, struct rtable **rp,
const struct flowi *oldflp)
static struct rtable *ip_route_output_slow(struct net *net,
const struct flowi *oldflp)
{
u32 tos = RT_FL_TOS(oldflp);
struct flowi fl = { .fl4_dst = oldflp->fl4_dst,
@ -2438,8 +2443,6 @@ static int ip_route_output_slow(struct net *net, struct rtable **rp,
unsigned int flags = 0;
struct net_device *dev_out = NULL;
struct rtable *rth;
int err;
res.fi = NULL;
#ifdef CONFIG_IP_MULTIPLE_TABLES
@ -2448,7 +2451,7 @@ static int ip_route_output_slow(struct net *net, struct rtable **rp,
rcu_read_lock();
if (oldflp->fl4_src) {
err = -EINVAL;
rth = ERR_PTR(-EINVAL);
if (ipv4_is_multicast(oldflp->fl4_src) ||
ipv4_is_lbcast(oldflp->fl4_src) ||
ipv4_is_zeronet(oldflp->fl4_src))
@ -2499,13 +2502,13 @@ static int ip_route_output_slow(struct net *net, struct rtable **rp,
if (oldflp->oif) {
dev_out = dev_get_by_index_rcu(net, oldflp->oif);
err = -ENODEV;
rth = ERR_PTR(-ENODEV);
if (dev_out == NULL)
goto out;
/* RACE: Check return value of inet_select_addr instead. */
if (!(dev_out->flags & IFF_UP) || !__in_dev_get_rcu(dev_out)) {
err = -ENETUNREACH;
rth = ERR_PTR(-ENETUNREACH);
goto out;
}
if (ipv4_is_local_multicast(oldflp->fl4_dst) ||
@ -2563,7 +2566,7 @@ static int ip_route_output_slow(struct net *net, struct rtable **rp,
res.type = RTN_UNICAST;
goto make_route;
}
err = -ENETUNREACH;
rth = ERR_PTR(-ENETUNREACH);
goto out;
}
@ -2598,23 +2601,20 @@ static int ip_route_output_slow(struct net *net, struct rtable **rp,
make_route:
rth = __mkroute_output(&res, &fl, oldflp, dev_out, flags);
if (IS_ERR(rth))
err = PTR_ERR(rth);
else {
if (!IS_ERR(rth)) {
unsigned int hash;
hash = rt_hash(oldflp->fl4_dst, oldflp->fl4_src, oldflp->oif,
rt_genid(dev_net(dev_out)));
err = rt_intern_hash(hash, rth, rp, NULL, oldflp->oif);
rth = rt_intern_hash(hash, rth, NULL, oldflp->oif);
}
out:
rcu_read_unlock();
return err;
return rth;
}
int __ip_route_output_key(struct net *net, struct rtable **rp,
const struct flowi *flp)
struct rtable *__ip_route_output_key(struct net *net, const struct flowi *flp)
{
struct rtable *rth;
unsigned int hash;
@ -2639,15 +2639,14 @@ int __ip_route_output_key(struct net *net, struct rtable **rp,
dst_use(&rth->dst, jiffies);
RT_CACHE_STAT_INC(out_hit);
rcu_read_unlock_bh();
*rp = rth;
return 0;
return rth;
}
RT_CACHE_STAT_INC(out_hlist_search);
}
rcu_read_unlock_bh();
slow_output:
return ip_route_output_slow(net, rp, flp);
return ip_route_output_slow(net, flp);
}
EXPORT_SYMBOL_GPL(__ip_route_output_key);
@ -2717,34 +2716,29 @@ struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_or
return rt ? &rt->dst : ERR_PTR(-ENOMEM);
}
int ip_route_output_flow(struct net *net, struct rtable **rp, struct flowi *flp,
struct sock *sk)
struct rtable *ip_route_output_flow(struct net *net, struct flowi *flp,
struct sock *sk)
{
int err;
struct rtable *rt = __ip_route_output_key(net, flp);
if ((err = __ip_route_output_key(net, rp, flp)) != 0)
return err;
if (IS_ERR(rt))
return rt;
if (flp->proto) {
if (!flp->fl4_src)
flp->fl4_src = (*rp)->rt_src;
flp->fl4_src = rt->rt_src;
if (!flp->fl4_dst)
flp->fl4_dst = (*rp)->rt_dst;
*rp = (struct rtable *) xfrm_lookup(net, &(*rp)->dst, flp, sk, 0);
if (IS_ERR(*rp)) {
err = PTR_ERR(*rp);
*rp = NULL;
return err;
}
flp->fl4_dst = rt->rt_dst;
rt = (struct rtable *) xfrm_lookup(net, &rt->dst, flp, sk, 0);
}
return 0;
return rt;
}
EXPORT_SYMBOL_GPL(ip_route_output_flow);
int ip_route_output_key(struct net *net, struct rtable **rp, struct flowi *flp)
struct rtable *ip_route_output_key(struct net *net, struct flowi *flp)
{
return ip_route_output_flow(net, rp, flp, NULL);
return ip_route_output_flow(net, flp, NULL);
}
EXPORT_SYMBOL(ip_route_output_key);
@ -2915,7 +2909,11 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
.oif = tb[RTA_OIF] ? nla_get_u32(tb[RTA_OIF]) : 0,
.mark = mark,
};
err = ip_route_output_key(net, &rt, &fl);
rt = ip_route_output_key(net, &fl);
err = 0;
if (IS_ERR(rt))
err = PTR_ERR(rt);
}
if (err)

3
net/ipv4/syncookies.c
View File

@ -355,7 +355,8 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
.fl_ip_sport = th->dest,
.fl_ip_dport = th->source };
security_req_classify_flow(req, &fl);
if (ip_route_output_key(sock_net(sk), &rt, &fl)) {
rt = ip_route_output_key(sock_net(sk), &fl);
if (IS_ERR(rt)) {
reqsk_free(req);
goto out;
}

28
net/ipv4/tcp_ipv4.c
View File

@ -152,7 +152,6 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
__be16 orig_sport, orig_dport;
struct rtable *rt;
__be32 daddr, nexthop;
int tmp;
int err;
if (addr_len < sizeof(struct sockaddr_in))
@ -170,14 +169,15 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
orig_sport = inet->inet_sport;
orig_dport = usin->sin_port;
tmp = ip_route_connect(&rt, nexthop, inet->inet_saddr,
RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
IPPROTO_TCP,
orig_sport, orig_dport, sk, true);
if (tmp < 0) {
if (tmp == -ENETUNREACH)
rt = ip_route_connect(nexthop, inet->inet_saddr,
RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
IPPROTO_TCP,
orig_sport, orig_dport, sk, true);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
if (err == -ENETUNREACH)
IP_INC_STATS_BH(sock_net(sk), IPSTATS_MIB_OUTNOROUTES);
return tmp;
return err;
}
if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) {
@ -236,12 +236,14 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
if (err)
goto failure;
err = ip_route_newports(&rt, IPPROTO_TCP,
orig_sport, orig_dport,
inet->inet_sport, inet->inet_dport, sk);
if (err)
rt = ip_route_newports(rt, IPPROTO_TCP,
orig_sport, orig_dport,
inet->inet_sport, inet->inet_dport, sk);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
rt = NULL;
goto failure;
}
/* OK, now commit destination to socket. */
sk->sk_gso_type = SKB_GSO_TCPV4;
sk_setup_caps(sk, &rt->dst);

5
net/ipv4/udp.c
View File

@ -922,8 +922,9 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
struct net *net = sock_net(sk);
security_sk_classify_flow(sk, &fl);
err = ip_route_output_flow(net, &rt, &fl, sk);
if (err) {
rt = ip_route_output_flow(net, &fl, sk);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
if (err == -ENETUNREACH)
IP_INC_STATS_BH(net, IPSTATS_MIB_OUTNOROUTES);
goto out;

12
net/ipv4/xfrm4_policy.c
View File

@ -26,18 +26,16 @@ static struct dst_entry *xfrm4_dst_lookup(struct net *net, int tos,
.fl4_dst = daddr->a4,
.fl4_tos = tos,
};
struct dst_entry *dst;
struct rtable *rt;
int err;
if (saddr)
fl.fl4_src = saddr->a4;
err = __ip_route_output_key(net, &rt, &fl);
dst = &rt->dst;
if (err)
dst = ERR_PTR(err);
return dst;
rt = __ip_route_output_key(net, &fl);
if (!IS_ERR(rt))
return &rt->dst;
return ERR_CAST(rt);
}
static int xfrm4_get_saddr(struct net *net,

11
net/ipv6/ip6_tunnel.c
View File

@ -581,7 +581,8 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
fl.fl4_dst = eiph->saddr;
fl.fl4_tos = RT_TOS(eiph->tos);
fl.proto = IPPROTO_IPIP;
if (ip_route_output_key(dev_net(skb->dev), &rt, &fl))
rt = ip_route_output_key(dev_net(skb->dev), &fl);
if (IS_ERR(rt))
goto out;
skb2->dev = rt->dst.dev;
@ -593,12 +594,14 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
fl.fl4_dst = eiph->daddr;
fl.fl4_src = eiph->saddr;
fl.fl4_tos = eiph->tos;
if (ip_route_output_key(dev_net(skb->dev), &rt, &fl) ||
rt = ip_route_output_key(dev_net(skb->dev), &fl);
if (IS_ERR(rt) ||
rt->dst.dev->type != ARPHRD_TUNNEL) {
ip_rt_put(rt);
if (!IS_ERR(rt))
ip_rt_put(rt);
goto out;
}
skb_dst_set(skb2, (struct dst_entry *)rt);
skb_dst_set(skb2, &rt->dst);
} else {
ip_rt_put(rt);
if (ip_route_input(skb2, eiph->daddr, eiph->saddr, eiph->tos,

8
net/ipv6/sit.c
View File

@ -738,7 +738,8 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
.fl4_tos = RT_TOS(tos),
.oif = tunnel->parms.link,
.proto = IPPROTO_IPV6 };
if (ip_route_output_key(dev_net(dev), &rt, &fl)) {
rt = ip_route_output_key(dev_net(dev), &fl);
if (IS_ERR(rt)) {
dev->stats.tx_carrier_errors++;
goto tx_error_icmp;
}
@ -862,8 +863,9 @@ static void ipip6_tunnel_bind_dev(struct net_device *dev)
.fl4_tos = RT_TOS(iph->tos),
.oif = tunnel->parms.link,
.proto = IPPROTO_IPV6 };
struct rtable *rt;
if (!ip_route_output_key(dev_net(dev), &rt, &fl)) {
struct rtable *rt = ip_route_output_key(dev_net(dev), &fl);
if (!IS_ERR(rt)) {
tdev = rt->dst.dev;
ip_rt_put(rt);
}

8
net/l2tp/l2tp_ip.c
View File

@ -320,11 +320,12 @@ static int l2tp_ip_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len
if (ipv4_is_multicast(lsa->l2tp_addr.s_addr))
goto out;
rc = ip_route_connect(&rt, lsa->l2tp_addr.s_addr, saddr,
rt = ip_route_connect(lsa->l2tp_addr.s_addr, saddr,
RT_CONN_FLAGS(sk), oif,
IPPROTO_L2TP,
0, 0, sk, true);
if (rc) {
if (IS_ERR(rt)) {
rc = PTR_ERR(rt);
if (rc == -ENETUNREACH)
IP_INC_STATS_BH(&init_net, IPSTATS_MIB_OUTNOROUTES);
goto out;
@ -489,7 +490,8 @@ static int l2tp_ip_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *m
* itself out.
*/
security_sk_classify_flow(sk, &fl);
if (ip_route_output_flow(sock_net(sk), &rt, &fl, sk))
rt = ip_route_output_flow(sock_net(sk), &fl, sk);
if (IS_ERR(rt))
goto no_route;
}
sk_setup_caps(sk, &rt->dst);

9
net/netfilter/ipvs/ip_vs_xmit.c
View File

@ -103,7 +103,8 @@ __ip_vs_get_out_rt(struct sk_buff *skb, struct ip_vs_dest *dest,
.fl4_tos = rtos,
};
if (ip_route_output_key(net, &rt, &fl)) {
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt)) {
spin_unlock(&dest->dst_lock);
IP_VS_DBG_RL("ip_route_output error, dest: %pI4\n",
&dest->addr.ip);
@ -121,7 +122,8 @@ __ip_vs_get_out_rt(struct sk_buff *skb, struct ip_vs_dest *dest,
.fl4_tos = rtos,
};
if (ip_route_output_key(net, &rt, &fl)) {
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt)) {
IP_VS_DBG_RL("ip_route_output error, dest: %pI4\n",
&daddr);
return NULL;
@ -180,7 +182,8 @@ __ip_vs_reroute_locally(struct sk_buff *skb)
.mark = skb->mark,
};
if (ip_route_output_key(net, &rt, &fl))
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt))
return 0;
if (!(rt->rt_flags & RTCF_LOCAL)) {
ip_rt_put(rt);

3
net/netfilter/xt_TEE.c
View File

@ -73,7 +73,8 @@ tee_tg_route4(struct sk_buff *skb, const struct xt_tee_tginfo *info)
fl.fl4_dst = info->gw.ip;
fl.fl4_tos = RT_TOS(iph->tos);
fl.fl4_scope = RT_SCOPE_UNIVERSE;
if (ip_route_output_key(net, &rt, &fl) != 0)
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt))
return false;
skb_dst_drop(skb);

7
net/rxrpc/ar-peer.c
View File

@ -37,7 +37,6 @@ static void rxrpc_assess_MTU_size(struct rxrpc_peer *peer)
{
struct rtable *rt;
struct flowi fl;
int ret;
peer->if_mtu = 1500;
@ -58,9 +57,9 @@ static void rxrpc_assess_MTU_size(struct rxrpc_peer *peer)
BUG();
}
ret = ip_route_output_key(&init_net, &rt, &fl);
if (ret < 0) {
_leave(" [route err %d]", ret);
rt = ip_route_output_key(&init_net, &fl);
if (IS_ERR(rt)) {
_leave(" [route err %ld]", PTR_ERR(rt));
return;
}

7
net/sctp/protocol.c
View File

@ -491,9 +491,9 @@ static struct dst_entry *sctp_v4_get_dst(struct sctp_association *asoc,
SCTP_DEBUG_PRINTK("%s: DST:%pI4, SRC:%pI4 - ",
__func__, &fl.fl4_dst, &fl.fl4_src);
if (!ip_route_output_key(&init_net, &rt, &fl)) {
rt = ip_route_output_key(&init_net, &fl);
if (!IS_ERR(rt))
dst = &rt->dst;
}
/* If there is no association or if a source address is passed, no
* more validation is required.
@ -535,7 +535,8 @@ static struct dst_entry *sctp_v4_get_dst(struct sctp_association *asoc,
(AF_INET == laddr->a.sa.sa_family)) {
fl.fl4_src = laddr->a.v4.sin_addr.s_addr;
fl.fl_ip_sport = laddr->a.v4.sin_port;
if (!ip_route_output_key(&init_net, &rt, &fl)) {
rt = ip_route_output_key(&init_net, &fl);
if (!IS_ERR(rt)) {
dst = &rt->dst;
goto out_unlock;
}