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Diffstat (limited to 'net/ipv4/route.c')
-rw-r--r--net/ipv4/route.c385
1 files changed, 189 insertions, 196 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 99e6e4bb1c72..b24d58e6bbcd 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -156,7 +156,7 @@ static u32 *ipv4_cow_metrics(struct dst_entry *dst, unsigned long old)
u32 *p = NULL;
if (!rt->peer)
- rt_bind_peer(rt, 1);
+ rt_bind_peer(rt, rt->rt_dst, 1);
peer = rt->peer;
if (peer) {
@@ -424,7 +424,7 @@ static int rt_cache_seq_show(struct seq_file *seq, void *v)
dst_metric(&r->dst, RTAX_WINDOW),
(int)((dst_metric(&r->dst, RTAX_RTT) >> 3) +
dst_metric(&r->dst, RTAX_RTTVAR)),
- r->rt_tos,
+ r->rt_key_tos,
r->dst.hh ? atomic_read(&r->dst.hh->hh_refcnt) : -1,
r->dst.hh ? (r->dst.hh->hh_output ==
dev_queue_xmit) : 0,
@@ -724,7 +724,7 @@ static inline int compare_keys(struct rtable *rt1, struct rtable *rt2)
return (((__force u32)rt1->rt_key_dst ^ (__force u32)rt2->rt_key_dst) |
((__force u32)rt1->rt_key_src ^ (__force u32)rt2->rt_key_src) |
(rt1->rt_mark ^ rt2->rt_mark) |
- (rt1->rt_tos ^ rt2->rt_tos) |
+ (rt1->rt_key_tos ^ rt2->rt_key_tos) |
(rt1->rt_oif ^ rt2->rt_oif) |
(rt1->rt_iif ^ rt2->rt_iif)) == 0;
}
@@ -968,10 +968,6 @@ static int rt_garbage_collect(struct dst_ops *ops)
break;
expire >>= 1;
-#if RT_CACHE_DEBUG >= 2
- printk(KERN_DEBUG "expire>> %u %d %d %d\n", expire,
- dst_entries_get_fast(&ipv4_dst_ops), goal, i);
-#endif
if (dst_entries_get_fast(&ipv4_dst_ops) < ip_rt_max_size)
goto out;
@@ -992,10 +988,6 @@ work_done:
dst_entries_get_fast(&ipv4_dst_ops) < ipv4_dst_ops.gc_thresh ||
dst_entries_get_slow(&ipv4_dst_ops) < ipv4_dst_ops.gc_thresh)
expire = ip_rt_gc_timeout;
-#if RT_CACHE_DEBUG >= 2
- printk(KERN_DEBUG "expire++ %u %d %d %d\n", expire,
- dst_entries_get_fast(&ipv4_dst_ops), goal, rover);
-#endif
out: return 0;
}
@@ -1179,16 +1171,6 @@ restart:
rt->dst.rt_next = rt_hash_table[hash].chain;
-#if RT_CACHE_DEBUG >= 2
- if (rt->dst.rt_next) {
- struct rtable *trt;
- printk(KERN_DEBUG "rt_cache @%02x: %pI4",
- hash, &rt->rt_dst);
- for (trt = rt->dst.rt_next; trt; trt = trt->dst.rt_next)
- printk(" . %pI4", &trt->rt_dst);
- printk("\n");
- }
-#endif
/*
* Since lookup is lockfree, we must make sure
* previous writes to rt are committed to memory
@@ -1211,11 +1193,11 @@ static u32 rt_peer_genid(void)
return atomic_read(&__rt_peer_genid);
}
-void rt_bind_peer(struct rtable *rt, int create)
+void rt_bind_peer(struct rtable *rt, __be32 daddr, int create)
{
struct inet_peer *peer;
- peer = inet_getpeer_v4(rt->rt_dst, create);
+ peer = inet_getpeer_v4(daddr, create);
if (peer && cmpxchg(&rt->peer, NULL, peer) != NULL)
inet_putpeer(peer);
@@ -1249,7 +1231,7 @@ void __ip_select_ident(struct iphdr *iph, struct dst_entry *dst, int more)
if (rt) {
if (rt->peer == NULL)
- rt_bind_peer(rt, 1);
+ rt_bind_peer(rt, rt->rt_dst, 1);
/* If peer is attached to destination, it is never detached,
so that we need not to grab a lock to dereference it.
@@ -1347,10 +1329,6 @@ static struct dst_entry *ipv4_negative_advice(struct dst_entry *dst)
unsigned hash = rt_hash(rt->rt_key_dst, rt->rt_key_src,
rt->rt_oif,
rt_genid(dev_net(dst->dev)));
-#if RT_CACHE_DEBUG >= 1
- printk(KERN_DEBUG "ipv4_negative_advice: redirect to %pI4/%02x dropped\n",
- &rt->rt_dst, rt->rt_tos);
-#endif
rt_del(hash, rt);
ret = NULL;
} else if (rt->peer &&
@@ -1399,7 +1377,7 @@ void ip_rt_send_redirect(struct sk_buff *skb)
rcu_read_unlock();
if (!rt->peer)
- rt_bind_peer(rt, 1);
+ rt_bind_peer(rt, rt->rt_dst, 1);
peer = rt->peer;
if (!peer) {
icmp_send(skb, ICMP_REDIRECT, ICMP_REDIR_HOST, rt->rt_gateway);
@@ -1435,7 +1413,7 @@ void ip_rt_send_redirect(struct sk_buff *skb)
peer->rate_tokens == ip_rt_redirect_number &&
net_ratelimit())
printk(KERN_WARNING "host %pI4/if%d ignores redirects for %pI4 to %pI4.\n",
- &rt->rt_src, rt->rt_iif,
+ &ip_hdr(skb)->saddr, rt->rt_iif,
&rt->rt_dst, &rt->rt_gateway);
#endif
}
@@ -1467,7 +1445,7 @@ static int ip_error(struct sk_buff *skb)
}
if (!rt->peer)
- rt_bind_peer(rt, 1);
+ rt_bind_peer(rt, rt->rt_dst, 1);
peer = rt->peer;
send = true;
@@ -1507,7 +1485,7 @@ static inline unsigned short guess_mtu(unsigned short old_mtu)
return 68;
}
-unsigned short ip_rt_frag_needed(struct net *net, struct iphdr *iph,
+unsigned short ip_rt_frag_needed(struct net *net, const struct iphdr *iph,
unsigned short new_mtu,
struct net_device *dev)
{
@@ -1574,7 +1552,7 @@ static void ip_rt_update_pmtu(struct dst_entry *dst, u32 mtu)
dst_confirm(dst);
if (!rt->peer)
- rt_bind_peer(rt, 1);
+ rt_bind_peer(rt, rt->rt_dst, 1);
peer = rt->peer;
if (peer) {
if (mtu < ip_rt_min_pmtu)
@@ -1631,7 +1609,7 @@ static struct dst_entry *ipv4_dst_check(struct dst_entry *dst, u32 cookie)
struct inet_peer *peer;
if (!rt->peer)
- rt_bind_peer(rt, 0);
+ rt_bind_peer(rt, rt->rt_dst, 0);
peer = rt->peer;
if (peer && peer->pmtu_expires)
@@ -1699,22 +1677,26 @@ static int ip_rt_bug(struct sk_buff *skb)
in IP options!
*/
-void ip_rt_get_source(u8 *addr, struct rtable *rt)
+void ip_rt_get_source(u8 *addr, struct sk_buff *skb, struct rtable *rt)
{
__be32 src;
- struct fib_result res;
if (rt_is_output_route(rt))
- src = rt->rt_src;
+ src = ip_hdr(skb)->saddr;
else {
- struct flowi4 fl4 = {
- .daddr = rt->rt_key_dst,
- .saddr = rt->rt_key_src,
- .flowi4_tos = rt->rt_tos,
- .flowi4_oif = rt->rt_oif,
- .flowi4_iif = rt->rt_iif,
- .flowi4_mark = rt->rt_mark,
- };
+ struct fib_result res;
+ struct flowi4 fl4;
+ struct iphdr *iph;
+
+ iph = ip_hdr(skb);
+
+ memset(&fl4, 0, sizeof(fl4));
+ fl4.daddr = iph->daddr;
+ fl4.saddr = iph->saddr;
+ fl4.flowi4_tos = iph->tos;
+ fl4.flowi4_oif = rt->dst.dev->ifindex;
+ fl4.flowi4_iif = skb->dev->ifindex;
+ fl4.flowi4_mark = skb->mark;
rcu_read_lock();
if (fib_lookup(dev_net(rt->dst.dev), &fl4, &res) == 0)
@@ -1767,7 +1749,7 @@ static unsigned int ipv4_default_mtu(const struct dst_entry *dst)
return mtu;
}
-static void rt_init_metrics(struct rtable *rt, const struct flowi4 *oldflp4,
+static void rt_init_metrics(struct rtable *rt, const struct flowi4 *fl4,
struct fib_info *fi)
{
struct inet_peer *peer;
@@ -1776,7 +1758,7 @@ static void rt_init_metrics(struct rtable *rt, const struct flowi4 *oldflp4,
/* If a peer entry exists for this destination, we must hook
* it up in order to get at cached metrics.
*/
- if (oldflp4 && (oldflp4->flowi4_flags & FLOWI_FLAG_PRECOW_METRICS))
+ if (fl4 && (fl4->flowi4_flags & FLOWI_FLAG_PRECOW_METRICS))
create = 1;
rt->peer = peer = inet_getpeer_v4(rt->rt_dst, create);
@@ -1803,7 +1785,7 @@ static void rt_init_metrics(struct rtable *rt, const struct flowi4 *oldflp4,
}
}
-static void rt_set_nexthop(struct rtable *rt, const struct flowi4 *oldflp4,
+static void rt_set_nexthop(struct rtable *rt, const struct flowi4 *fl4,
const struct fib_result *res,
struct fib_info *fi, u16 type, u32 itag)
{
@@ -1813,7 +1795,7 @@ static void rt_set_nexthop(struct rtable *rt, const struct flowi4 *oldflp4,
if (FIB_RES_GW(*res) &&
FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK)
rt->rt_gateway = FIB_RES_GW(*res);
- rt_init_metrics(rt, oldflp4, fi);
+ rt_init_metrics(rt, fl4, fi);
#ifdef CONFIG_IP_ROUTE_CLASSID
dst->tclassid = FIB_RES_NH(*res).nh_tclassid;
#endif
@@ -1830,20 +1812,15 @@ static void rt_set_nexthop(struct rtable *rt, const struct flowi4 *oldflp4,
#endif
set_class_tag(rt, itag);
#endif
- rt->rt_type = type;
}
-static struct rtable *rt_dst_alloc(bool nopolicy, bool noxfrm)
+static struct rtable *rt_dst_alloc(struct net_device *dev,
+ bool nopolicy, bool noxfrm)
{
- struct rtable *rt = dst_alloc(&ipv4_dst_ops, 1);
- if (rt) {
- rt->dst.obsolete = -1;
-
- rt->dst.flags = DST_HOST |
- (nopolicy ? DST_NOPOLICY : 0) |
- (noxfrm ? DST_NOXFRM : 0);
- }
- return rt;
+ return dst_alloc(&ipv4_dst_ops, dev, 1, -1,
+ DST_HOST |
+ (nopolicy ? DST_NOPOLICY : 0) |
+ (noxfrm ? DST_NOXFRM : 0));
}
/* called in rcu_read_lock() section */
@@ -1871,36 +1848,38 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
goto e_inval;
spec_dst = inet_select_addr(dev, 0, RT_SCOPE_LINK);
} else {
- err = fib_validate_source(saddr, 0, tos, 0, dev, &spec_dst,
- &itag, 0);
+ err = fib_validate_source(skb, saddr, 0, tos, 0, dev, &spec_dst,
+ &itag);
if (err < 0)
goto e_err;
}
- rth = rt_dst_alloc(IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
+ rth = rt_dst_alloc(init_net.loopback_dev,
+ IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
if (!rth)
goto e_nobufs;
+#ifdef CONFIG_IP_ROUTE_CLASSID
+ rth->dst.tclassid = itag;
+#endif
rth->dst.output = ip_rt_bug;
rth->rt_key_dst = daddr;
- rth->rt_dst = daddr;
- rth->rt_tos = tos;
- rth->rt_mark = skb->mark;
rth->rt_key_src = saddr;
+ rth->rt_genid = rt_genid(dev_net(dev));
+ rth->rt_flags = RTCF_MULTICAST;
+ rth->rt_type = RTN_MULTICAST;
+ rth->rt_key_tos = tos;
+ rth->rt_dst = daddr;
rth->rt_src = saddr;
-#ifdef CONFIG_IP_ROUTE_CLASSID
- rth->dst.tclassid = itag;
-#endif
rth->rt_route_iif = dev->ifindex;
rth->rt_iif = dev->ifindex;
- rth->dst.dev = init_net.loopback_dev;
- dev_hold(rth->dst.dev);
rth->rt_oif = 0;
+ rth->rt_mark = skb->mark;
rth->rt_gateway = daddr;
rth->rt_spec_dst= spec_dst;
- rth->rt_genid = rt_genid(dev_net(dev));
- rth->rt_flags = RTCF_MULTICAST;
- rth->rt_type = RTN_MULTICAST;
+ rth->rt_peer_genid = 0;
+ rth->peer = NULL;
+ rth->fi = NULL;
if (our) {
rth->dst.input= ip_local_deliver;
rth->rt_flags |= RTCF_LOCAL;
@@ -1981,8 +1960,8 @@ static int __mkroute_input(struct sk_buff *skb,
}
- err = fib_validate_source(saddr, daddr, tos, FIB_RES_OIF(*res),
- in_dev->dev, &spec_dst, &itag, skb->mark);
+ err = fib_validate_source(skb, saddr, daddr, tos, FIB_RES_OIF(*res),
+ in_dev->dev, &spec_dst, &itag);
if (err < 0) {
ip_handle_martian_source(in_dev->dev, in_dev, skb, daddr,
saddr);
@@ -2013,7 +1992,8 @@ static int __mkroute_input(struct sk_buff *skb,
}
}
- rth = rt_dst_alloc(IN_DEV_CONF_GET(in_dev, NOPOLICY),
+ rth = rt_dst_alloc(out_dev->dev,
+ IN_DEV_CONF_GET(in_dev, NOPOLICY),
IN_DEV_CONF_GET(out_dev, NOXFRM));
if (!rth) {
err = -ENOBUFS;
@@ -2021,27 +2001,28 @@ static int __mkroute_input(struct sk_buff *skb,
}
rth->rt_key_dst = daddr;
- rth->rt_dst = daddr;
- rth->rt_tos = tos;
- rth->rt_mark = skb->mark;
rth->rt_key_src = saddr;
+ rth->rt_genid = rt_genid(dev_net(rth->dst.dev));
+ rth->rt_flags = flags;
+ rth->rt_type = res->type;
+ rth->rt_key_tos = tos;
+ rth->rt_dst = daddr;
rth->rt_src = saddr;
- rth->rt_gateway = daddr;
rth->rt_route_iif = in_dev->dev->ifindex;
rth->rt_iif = in_dev->dev->ifindex;
- rth->dst.dev = (out_dev)->dev;
- dev_hold(rth->dst.dev);
rth->rt_oif = 0;
+ rth->rt_mark = skb->mark;
+ rth->rt_gateway = daddr;
rth->rt_spec_dst= spec_dst;
+ rth->rt_peer_genid = 0;
+ rth->peer = NULL;
+ rth->fi = NULL;
rth->dst.input = ip_forward;
rth->dst.output = ip_output;
- rth->rt_genid = rt_genid(dev_net(rth->dst.dev));
rt_set_nexthop(rth, NULL, res, res->fi, res->type, itag);
- rth->rt_flags = flags;
-
*result = rth;
err = 0;
cleanup:
@@ -2150,9 +2131,9 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
goto brd_input;
if (res.type == RTN_LOCAL) {
- err = fib_validate_source(saddr, daddr, tos,
+ err = fib_validate_source(skb, saddr, daddr, tos,
net->loopback_dev->ifindex,
- dev, &spec_dst, &itag, skb->mark);
+ dev, &spec_dst, &itag);
if (err < 0)
goto martian_source_keep_err;
if (err)
@@ -2176,8 +2157,8 @@ brd_input:
if (ipv4_is_zeronet(saddr))
spec_dst = inet_select_addr(dev, 0, RT_SCOPE_LINK);
else {
- err = fib_validate_source(saddr, 0, tos, 0, dev, &spec_dst,
- &itag, skb->mark);
+ err = fib_validate_source(skb, saddr, 0, tos, 0, dev, &spec_dst,
+ &itag);
if (err < 0)
goto martian_source_keep_err;
if (err)
@@ -2188,36 +2169,42 @@ brd_input:
RT_CACHE_STAT_INC(in_brd);
local_input:
- rth = rt_dst_alloc(IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
+ rth = rt_dst_alloc(net->loopback_dev,
+ IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
if (!rth)
goto e_nobufs;
+ rth->dst.input= ip_local_deliver;
rth->dst.output= ip_rt_bug;
- rth->rt_genid = rt_genid(net);
+#ifdef CONFIG_IP_ROUTE_CLASSID
+ rth->dst.tclassid = itag;
+#endif
rth->rt_key_dst = daddr;
- rth->rt_dst = daddr;
- rth->rt_tos = tos;
- rth->rt_mark = skb->mark;
rth->rt_key_src = saddr;
+ rth->rt_genid = rt_genid(net);
+ rth->rt_flags = flags|RTCF_LOCAL;
+ rth->rt_type = res.type;
+ rth->rt_key_tos = tos;
+ rth->rt_dst = daddr;
rth->rt_src = saddr;
#ifdef CONFIG_IP_ROUTE_CLASSID
rth->dst.tclassid = itag;
#endif
rth->rt_route_iif = dev->ifindex;
rth->rt_iif = dev->ifindex;
- rth->dst.dev = net->loopback_dev;
- dev_hold(rth->dst.dev);
+ rth->rt_oif = 0;
+ rth->rt_mark = skb->mark;
rth->rt_gateway = daddr;
rth->rt_spec_dst= spec_dst;
- rth->dst.input= ip_local_deliver;
- rth->rt_flags = flags|RTCF_LOCAL;
+ rth->rt_peer_genid = 0;
+ rth->peer = NULL;
+ rth->fi = NULL;
if (res.type == RTN_UNREACHABLE) {
rth->dst.input= ip_error;
rth->dst.error= -err;
rth->rt_flags &= ~RTCF_LOCAL;
}
- rth->rt_type = res.type;
hash = rt_hash(daddr, saddr, fl4.flowi4_iif, rt_genid(net));
rth = rt_intern_hash(hash, rth, skb, fl4.flowi4_iif);
err = 0;
@@ -2288,7 +2275,7 @@ int ip_route_input_common(struct sk_buff *skb, __be32 daddr, __be32 saddr,
((__force u32)rth->rt_key_src ^ (__force u32)saddr) |
(rth->rt_iif ^ iif) |
rth->rt_oif |
- (rth->rt_tos ^ tos)) == 0 &&
+ (rth->rt_key_tos ^ tos)) == 0 &&
rth->rt_mark == skb->mark &&
net_eq(dev_net(rth->dst.dev), net) &&
!rt_is_expired(rth)) {
@@ -2349,12 +2336,12 @@ EXPORT_SYMBOL(ip_route_input_common);
/* called with rcu_read_lock() */
static struct rtable *__mkroute_output(const struct fib_result *res,
const struct flowi4 *fl4,
- const struct flowi4 *oldflp4,
- struct net_device *dev_out,
+ __be32 orig_daddr, __be32 orig_saddr,
+ int orig_oif, struct net_device *dev_out,
unsigned int flags)
{
struct fib_info *fi = res->fi;
- u32 tos = RT_FL_TOS(oldflp4);
+ u32 tos = RT_FL_TOS(fl4);
struct in_device *in_dev;
u16 type = res->type;
struct rtable *rth;
@@ -2381,8 +2368,8 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
fi = NULL;
} else if (type == RTN_MULTICAST) {
flags |= RTCF_MULTICAST | RTCF_LOCAL;
- if (!ip_check_mc_rcu(in_dev, oldflp4->daddr, oldflp4->saddr,
- oldflp4->flowi4_proto))
+ if (!ip_check_mc_rcu(in_dev, fl4->daddr, fl4->saddr,
+ fl4->flowi4_proto))
flags &= ~RTCF_LOCAL;
/* If multicast route do not exist use
* default one, but do not gateway in this case.
@@ -2392,29 +2379,31 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
fi = NULL;
}
- rth = rt_dst_alloc(IN_DEV_CONF_GET(in_dev, NOPOLICY),
+ rth = rt_dst_alloc(dev_out,
+ IN_DEV_CONF_GET(in_dev, NOPOLICY),
IN_DEV_CONF_GET(in_dev, NOXFRM));
if (!rth)
return ERR_PTR(-ENOBUFS);
- rth->rt_key_dst = oldflp4->daddr;
- rth->rt_tos = tos;
- rth->rt_key_src = oldflp4->saddr;
- rth->rt_oif = oldflp4->flowi4_oif;
- rth->rt_mark = oldflp4->flowi4_mark;
+ rth->dst.output = ip_output;
+
+ rth->rt_key_dst = orig_daddr;
+ rth->rt_key_src = orig_saddr;
+ rth->rt_genid = rt_genid(dev_net(dev_out));
+ rth->rt_flags = flags;
+ rth->rt_type = type;
+ rth->rt_key_tos = tos;
rth->rt_dst = fl4->daddr;
rth->rt_src = fl4->saddr;
rth->rt_route_iif = 0;
- rth->rt_iif = oldflp4->flowi4_oif ? : dev_out->ifindex;
- /* get references to the devices that are to be hold by the routing
- cache entry */
- rth->dst.dev = dev_out;
- dev_hold(dev_out);
+ rth->rt_iif = orig_oif ? : dev_out->ifindex;
+ rth->rt_oif = orig_oif;
+ rth->rt_mark = fl4->flowi4_mark;
rth->rt_gateway = fl4->daddr;
rth->rt_spec_dst= fl4->saddr;
-
- rth->dst.output=ip_output;
- rth->rt_genid = rt_genid(dev_net(dev_out));
+ rth->rt_peer_genid = 0;
+ rth->peer = NULL;
+ rth->fi = NULL;
RT_CACHE_STAT_INC(out_slow_tot);
@@ -2432,7 +2421,7 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
#ifdef CONFIG_IP_MROUTE
if (type == RTN_MULTICAST) {
if (IN_DEV_MFORWARD(in_dev) &&
- !ipv4_is_local_multicast(oldflp4->daddr)) {
+ !ipv4_is_local_multicast(fl4->daddr)) {
rth->dst.input = ip_mr_input;
rth->dst.output = ip_mc_output;
}
@@ -2440,9 +2429,8 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
#endif
}
- rt_set_nexthop(rth, oldflp4, res, fi, type, 0);
+ rt_set_nexthop(rth, fl4, res, fi, type, 0);
- rth->rt_flags = flags;
return rth;
}
@@ -2451,36 +2439,37 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
* called with rcu_read_lock();
*/
-static struct rtable *ip_route_output_slow(struct net *net,
- const struct flowi4 *oldflp4)
+static struct rtable *ip_route_output_slow(struct net *net, struct flowi4 *fl4)
{
- u32 tos = RT_FL_TOS(oldflp4);
- struct flowi4 fl4;
- struct fib_result res;
- unsigned int flags = 0;
struct net_device *dev_out = NULL;
+ u32 tos = RT_FL_TOS(fl4);
+ unsigned int flags = 0;
+ struct fib_result res;
struct rtable *rth;
+ __be32 orig_daddr;
+ __be32 orig_saddr;
+ int orig_oif;
res.fi = NULL;
#ifdef CONFIG_IP_MULTIPLE_TABLES
res.r = NULL;
#endif
- fl4.flowi4_oif = oldflp4->flowi4_oif;
- fl4.flowi4_iif = net->loopback_dev->ifindex;
- fl4.flowi4_mark = oldflp4->flowi4_mark;
- fl4.daddr = oldflp4->daddr;
- fl4.saddr = oldflp4->saddr;
- fl4.flowi4_tos = tos & IPTOS_RT_MASK;
- fl4.flowi4_scope = ((tos & RTO_ONLINK) ?
- RT_SCOPE_LINK : RT_SCOPE_UNIVERSE);
+ orig_daddr = fl4->daddr;
+ orig_saddr = fl4->saddr;
+ orig_oif = fl4->flowi4_oif;
+
+ fl4->flowi4_iif = net->loopback_dev->ifindex;
+ fl4->flowi4_tos = tos & IPTOS_RT_MASK;
+ fl4->flowi4_scope = ((tos & RTO_ONLINK) ?
+ RT_SCOPE_LINK : RT_SCOPE_UNIVERSE);
rcu_read_lock();
- if (oldflp4->saddr) {
+ if (fl4->saddr) {
rth = ERR_PTR(-EINVAL);
- if (ipv4_is_multicast(oldflp4->saddr) ||
- ipv4_is_lbcast(oldflp4->saddr) ||
- ipv4_is_zeronet(oldflp4->saddr))
+ if (ipv4_is_multicast(fl4->saddr) ||
+ ipv4_is_lbcast(fl4->saddr) ||
+ ipv4_is_zeronet(fl4->saddr))
goto out;
/* I removed check for oif == dev_out->oif here.
@@ -2491,11 +2480,11 @@ static struct rtable *ip_route_output_slow(struct net *net,
of another iface. --ANK
*/
- if (oldflp4->flowi4_oif == 0 &&
- (ipv4_is_multicast(oldflp4->daddr) ||
- ipv4_is_lbcast(oldflp4->daddr))) {
+ if (fl4->flowi4_oif == 0 &&
+ (ipv4_is_multicast(fl4->daddr) ||
+ ipv4_is_lbcast(fl4->daddr))) {
/* It is equivalent to inet_addr_type(saddr) == RTN_LOCAL */
- dev_out = __ip_dev_find(net, oldflp4->saddr, false);
+ dev_out = __ip_dev_find(net, fl4->saddr, false);
if (dev_out == NULL)
goto out;
@@ -2514,20 +2503,20 @@ static struct rtable *ip_route_output_slow(struct net *net,
Luckily, this hack is good workaround.
*/
- fl4.flowi4_oif = dev_out->ifindex;
+ fl4->flowi4_oif = dev_out->ifindex;
goto make_route;
}
- if (!(oldflp4->flowi4_flags & FLOWI_FLAG_ANYSRC)) {
+ if (!(fl4->flowi4_flags & FLOWI_FLAG_ANYSRC)) {
/* It is equivalent to inet_addr_type(saddr) == RTN_LOCAL */
- if (!__ip_dev_find(net, oldflp4->saddr, false))
+ if (!__ip_dev_find(net, fl4->saddr, false))
goto out;
}
}
- if (oldflp4->flowi4_oif) {
- dev_out = dev_get_by_index_rcu(net, oldflp4->flowi4_oif);
+ if (fl4->flowi4_oif) {
+ dev_out = dev_get_by_index_rcu(net, fl4->flowi4_oif);
rth = ERR_PTR(-ENODEV);
if (dev_out == NULL)
goto out;
@@ -2537,37 +2526,37 @@ static struct rtable *ip_route_output_slow(struct net *net,
rth = ERR_PTR(-ENETUNREACH);
goto out;
}
- if (ipv4_is_local_multicast(oldflp4->daddr) ||
- ipv4_is_lbcast(oldflp4->daddr)) {
- if (!fl4.saddr)
- fl4.saddr = inet_select_addr(dev_out, 0,
- RT_SCOPE_LINK);
+ if (ipv4_is_local_multicast(fl4->daddr) ||
+ ipv4_is_lbcast(fl4->daddr)) {
+ if (!fl4->saddr)
+ fl4->saddr = inet_select_addr(dev_out, 0,
+ RT_SCOPE_LINK);
goto make_route;
}
- if (!fl4.saddr) {
- if (ipv4_is_multicast(oldflp4->daddr))
- fl4.saddr = inet_select_addr(dev_out, 0,
- fl4.flowi4_scope);
- else if (!oldflp4->daddr)
- fl4.saddr = inet_select_addr(dev_out, 0,
- RT_SCOPE_HOST);
+ if (fl4->saddr) {
+ if (ipv4_is_multicast(fl4->daddr))
+ fl4->saddr = inet_select_addr(dev_out, 0,
+ fl4->flowi4_scope);
+ else if (!fl4->daddr)
+ fl4->saddr = inet_select_addr(dev_out, 0,
+ RT_SCOPE_HOST);
}
}
- if (!fl4.daddr) {
- fl4.daddr = fl4.saddr;
- if (!fl4.daddr)
- fl4.daddr = fl4.saddr = htonl(INADDR_LOOPBACK);
+ if (!fl4->daddr) {
+ fl4->daddr = fl4->saddr;
+ if (!fl4->daddr)
+ fl4->daddr = fl4->saddr = htonl(INADDR_LOOPBACK);
dev_out = net->loopback_dev;
- fl4.flowi4_oif = net->loopback_dev->ifindex;
+ fl4->flowi4_oif = net->loopback_dev->ifindex;
res.type = RTN_LOCAL;
flags |= RTCF_LOCAL;
goto make_route;
}
- if (fib_lookup(net, &fl4, &res)) {
+ if (fib_lookup(net, fl4, &res)) {
res.fi = NULL;
- if (oldflp4->flowi4_oif) {
+ if (fl4->flowi4_oif) {
/* Apparently, routing tables are wrong. Assume,
that the destination is on link.
@@ -2586,9 +2575,9 @@ static struct rtable *ip_route_output_slow(struct net *net,
likely IPv6, but we do not.
*/
- if (fl4.saddr == 0)
- fl4.saddr = inet_select_addr(dev_out, 0,
- RT_SCOPE_LINK);
+ if (fl4->saddr == 0)
+ fl4->saddr = inet_select_addr(dev_out, 0,
+ RT_SCOPE_LINK);
res.type = RTN_UNICAST;
goto make_route;
}
@@ -2597,42 +2586,45 @@ static struct rtable *ip_route_output_slow(struct net *net,
}
if (res.type == RTN_LOCAL) {
- if (!fl4.saddr) {
+ if (!fl4->saddr) {
if (res.fi->fib_prefsrc)
- fl4.saddr = res.fi->fib_prefsrc;
+ fl4->saddr = res.fi->fib_prefsrc;
else
- fl4.saddr = fl4.daddr;
+ fl4->saddr = fl4->daddr;
}
dev_out = net->loopback_dev;
- fl4.flowi4_oif = dev_out->ifindex;
+ fl4->flowi4_oif = dev_out->ifindex;
res.fi = NULL;
flags |= RTCF_LOCAL;
goto make_route;
}
#ifdef CONFIG_IP_ROUTE_MULTIPATH
- if (res.fi->fib_nhs > 1 && fl4.flowi4_oif == 0)
+ if (res.fi->fib_nhs > 1 && fl4->flowi4_oif == 0)
fib_select_multipath(&res);
else
#endif
- if (!res.prefixlen && res.type == RTN_UNICAST && !fl4.flowi4_oif)
+ if (!res.prefixlen &&
+ res.table->tb_num_default > 1 &&
+ res.type == RTN_UNICAST && !fl4->flowi4_oif)
fib_select_default(&res);
- if (!fl4.saddr)
- fl4.saddr = FIB_RES_PREFSRC(net, res);
+ if (!fl4->saddr)
+ fl4->saddr = FIB_RES_PREFSRC(net, res);
dev_out = FIB_RES_DEV(res);
- fl4.flowi4_oif = dev_out->ifindex;
+ fl4->flowi4_oif = dev_out->ifindex;
make_route:
- rth = __mkroute_output(&res, &fl4, oldflp4, dev_out, flags);
+ rth = __mkroute_output(&res, fl4, orig_daddr, orig_saddr, orig_oif,
+ dev_out, flags);
if (!IS_ERR(rth)) {
unsigned int hash;
- hash = rt_hash(oldflp4->daddr, oldflp4->saddr, oldflp4->flowi4_oif,
+ hash = rt_hash(orig_daddr, orig_saddr, orig_oif,
rt_genid(dev_net(dev_out)));
- rth = rt_intern_hash(hash, rth, NULL, oldflp4->flowi4_oif);
+ rth = rt_intern_hash(hash, rth, NULL, orig_oif);
}
out:
@@ -2640,7 +2632,7 @@ out:
return rth;
}
-struct rtable *__ip_route_output_key(struct net *net, const struct flowi4 *flp4)
+struct rtable *__ip_route_output_key(struct net *net, struct flowi4 *flp4)
{
struct rtable *rth;
unsigned int hash;
@@ -2658,13 +2650,17 @@ struct rtable *__ip_route_output_key(struct net *net, const struct flowi4 *flp4)
rt_is_output_route(rth) &&
rth->rt_oif == flp4->flowi4_oif &&
rth->rt_mark == flp4->flowi4_mark &&
- !((rth->rt_tos ^ flp4->flowi4_tos) &
+ !((rth->rt_key_tos ^ flp4->flowi4_tos) &
(IPTOS_RT_MASK | RTO_ONLINK)) &&
net_eq(dev_net(rth->dst.dev), net) &&
!rt_is_expired(rth)) {
dst_use(&rth->dst, jiffies);
RT_CACHE_STAT_INC(out_hit);
rcu_read_unlock_bh();
+ if (!flp4->saddr)
+ flp4->saddr = rth->rt_src;
+ if (!flp4->daddr)
+ flp4->daddr = rth->rt_dst;
return rth;
}
RT_CACHE_STAT_INC(out_hlist_search);
@@ -2709,7 +2705,7 @@ static struct dst_ops ipv4_dst_blackhole_ops = {
struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_orig)
{
- struct rtable *rt = dst_alloc(&ipv4_dst_blackhole_ops, 1);
+ struct rtable *rt = dst_alloc(&ipv4_dst_blackhole_ops, NULL, 1, 0, 0);
struct rtable *ort = (struct rtable *) dst_orig;
if (rt) {
@@ -2726,7 +2722,7 @@ struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_or
rt->rt_key_dst = ort->rt_key_dst;
rt->rt_key_src = ort->rt_key_src;
- rt->rt_tos = ort->rt_tos;
+ rt->rt_key_tos = ort->rt_key_tos;
rt->rt_route_iif = ort->rt_route_iif;
rt->rt_iif = ort->rt_iif;
rt->rt_oif = ort->rt_oif;
@@ -2762,15 +2758,10 @@ struct rtable *ip_route_output_flow(struct net *net, struct flowi4 *flp4,
if (IS_ERR(rt))
return rt;
- if (flp4->flowi4_proto) {
- if (!flp4->saddr)
- flp4->saddr = rt->rt_src;
- if (!flp4->daddr)
- flp4->daddr = rt->rt_dst;
+ if (flp4->flowi4_proto)
rt = (struct rtable *) xfrm_lookup(net, &rt->dst,
flowi4_to_flowi(flp4),
sk, 0);
- }
return rt;
}
@@ -2794,7 +2785,7 @@ static int rt_fill_info(struct net *net,
r->rtm_family = AF_INET;
r->rtm_dst_len = 32;
r->rtm_src_len = 0;
- r->rtm_tos = rt->rt_tos;
+ r->rtm_tos = rt->rt_key_tos;
r->rtm_table = RT_TABLE_MAIN;
NLA_PUT_U32(skb, RTA_TABLE, RT_TABLE_MAIN);
r->rtm_type = rt->rt_type;
@@ -2848,7 +2839,9 @@ static int rt_fill_info(struct net *net,
if (ipv4_is_multicast(dst) && !ipv4_is_local_multicast(dst) &&
IPV4_DEVCONF_ALL(net, MC_FORWARDING)) {
- int err = ipmr_get_route(net, skb, r, nowait);
+ int err = ipmr_get_route(net, skb,
+ rt->rt_src, rt->rt_dst,
+ r, nowait);
if (err <= 0) {
if (!nowait) {
if (err == 0)