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inet: Create and use rt{,6}_get_peer_create(). 

There's a lot of places that open-code rt{,6}_get_peer() only because
they want to set 'create' to one.  So add an rt{,6}_get_peer_create()
for their sake.

There were also a few spots open-coding plain rt{,6}_get_peer() and
those are transformed here as well.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-06-08 23:24:18 -07:00
parent 7123aaa3a1
commit fbfe95a42e
10 changed files with 49 additions and 58 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
include/net/ip6_route.h
View File

@ -53,18 +53,27 @@ static inline unsigned int rt6_flags2srcprefs(int flags)
return (flags >> 3) & 7;
}
extern void rt6_bind_peer(struct rt6_info *rt,
int create);
extern void rt6_bind_peer(struct rt6_info *rt, int create);
static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt)
static inline struct inet_peer *__rt6_get_peer(struct rt6_info *rt, int create)
{
if (rt->rt6i_peer)
return rt->rt6i_peer;
rt6_bind_peer(rt, 0);
rt6_bind_peer(rt, create);
return rt->rt6i_peer;
}
static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt)
{
return __rt6_get_peer(rt, 0);
}
static inline struct inet_peer *rt6_get_peer_create(struct rt6_info *rt)
{
return __rt6_get_peer(rt, 1);
}
extern void ip6_route_input(struct sk_buff *skb);
extern struct dst_entry * ip6_route_output(struct net *net,

14
include/net/route.h
View File

@ -296,15 +296,25 @@ static inline struct rtable *ip_route_newports(struct flowi4 *fl4, struct rtable
extern void rt_bind_peer(struct rtable *rt, __be32 daddr, int create);
static inline struct inet_peer *rt_get_peer(struct rtable *rt, __be32 daddr)
static inline struct inet_peer *__rt_get_peer(struct rtable *rt, __be32 daddr, int create)
{
if (rt->peer)
return rt->peer;
rt_bind_peer(rt, daddr, 0);
rt_bind_peer(rt, daddr, create);
return rt->peer;
}
static inline struct inet_peer *rt_get_peer(struct rtable *rt, __be32 daddr)
{
return __rt_get_peer(rt, daddr, 0);
}
static inline struct inet_peer *rt_get_peer_create(struct rtable *rt, __be32 daddr)
{
return __rt_get_peer(rt, daddr, 1);
}
static inline int inet_iif(const struct sk_buff *skb)
{
return skb_rtable(skb)->rt_iif;

5
net/ipv4/icmp.c
View File

@ -253,9 +253,8 @@ static inline bool icmpv4_xrlim_allow(struct net *net, struct rtable *rt,
/* Limit if icmp type is enabled in ratemask. */
if ((1 << type) & net->ipv4.sysctl_icmp_ratemask) {
if (!rt->peer)
rt_bind_peer(rt, fl4->daddr, 1);
rc = inet_peer_xrlim_allow(rt->peer,
struct inet_peer *peer = rt_get_peer_create(rt, fl4->daddr);
rc = inet_peer_xrlim_allow(peer,
net->ipv4.sysctl_icmp_ratelimit);
}
out:

35
net/ipv4/route.c
View File

@ -162,10 +162,7 @@ static u32 *ipv4_cow_metrics(struct dst_entry *dst, unsigned long old)
struct inet_peer *peer;
u32 *p = NULL;
if (!rt->peer)
rt_bind_peer(rt, rt->rt_dst, 1);
peer = rt->peer;
peer = rt_get_peer_create(rt, rt->rt_dst);
if (peer) {
u32 *old_p = __DST_METRICS_PTR(old);
unsigned long prev, new;
@ -1364,14 +1361,13 @@ void __ip_select_ident(struct iphdr *iph, struct dst_entry *dst, int more)
struct rtable *rt = (struct rtable *) dst;
if (rt && !(rt->dst.flags & DST_NOPEER)) {
if (rt->peer == NULL)
rt_bind_peer(rt, rt->rt_dst, 1);
struct inet_peer *peer = rt_get_peer_create(rt, rt->rt_dst);
/* If peer is attached to destination, it is never detached,
so that we need not to grab a lock to dereference it.
*/
if (rt->peer) {
iph->id = htons(inet_getid(rt->peer, more));
if (peer) {
iph->id = htons(inet_getid(peer, more));
return;
}
} else if (!rt)
@ -1481,10 +1477,7 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
rt->rt_gateway != old_gw)
continue;
if (!rt->peer)
rt_bind_peer(rt, rt->rt_dst, 1);
peer = rt->peer;
peer = rt_get_peer_create(rt, rt->rt_dst);
if (peer) {
if (peer->redirect_learned.a4 != new_gw) {
peer->redirect_learned.a4 = new_gw;
@ -1579,9 +1572,7 @@ void ip_rt_send_redirect(struct sk_buff *skb)
log_martians = IN_DEV_LOG_MARTIANS(in_dev);
rcu_read_unlock();
if (!rt->peer)
rt_bind_peer(rt, rt->rt_dst, 1);
peer = rt->peer;
peer = rt_get_peer_create(rt, rt->rt_dst);
if (!peer) {
icmp_send(skb, ICMP_REDIRECT, ICMP_REDIR_HOST, rt->rt_gateway);
return;
@ -1646,9 +1637,7 @@ static int ip_error(struct sk_buff *skb)
break;
}
if (!rt->peer)
rt_bind_peer(rt, rt->rt_dst, 1);
peer = rt->peer;
peer = rt_get_peer_create(rt, rt->rt_dst);
send = true;
if (peer) {
@ -1754,9 +1743,7 @@ static void ip_rt_update_pmtu(struct dst_entry *dst, u32 mtu)
dst_confirm(dst);
if (!rt->peer)
rt_bind_peer(rt, rt->rt_dst, 1);
peer = rt->peer;
peer = rt_get_peer_create(rt, rt->rt_dst);
if (peer) {
unsigned long pmtu_expires = ACCESS_ONCE(peer->pmtu_expires);
@ -1782,12 +1769,8 @@ static void ip_rt_update_pmtu(struct dst_entry *dst, u32 mtu)
static void ipv4_validate_peer(struct rtable *rt)
{
if (rt->rt_peer_genid != rt_peer_genid()) {
struct inet_peer *peer;
struct inet_peer *peer = rt_get_peer(rt, rt->rt_dst);
if (!rt->peer)
rt_bind_peer(rt, rt->rt_dst, 0);
peer = rt->peer;
if (peer) {
check_peer_pmtu(&rt->dst, peer);

4
net/ipv4/tcp_ipv4.c
View File

@ -1832,9 +1832,7 @@ struct inet_peer *tcp_v4_get_peer(struct sock *sk, bool *release_it)
peer = inet_getpeer_v4(net, inet->inet_daddr, 1);
*release_it = true;
} else {
if (!rt->peer)
rt_bind_peer(rt, inet->inet_daddr, 1);
peer = rt->peer;
peer = rt_get_peer_create(rt, inet->inet_daddr);
*release_it = false;
}

6
net/ipv6/icmp.c
View File

@ -188,14 +188,14 @@ static inline bool icmpv6_xrlim_allow(struct sock *sk, u8 type,
} else {
struct rt6_info *rt = (struct rt6_info *)dst;
int tmo = net->ipv6.sysctl.icmpv6_time;
struct inet_peer *peer;
/* Give more bandwidth to wider prefixes. */
if (rt->rt6i_dst.plen < 128)
tmo >>= ((128 - rt->rt6i_dst.plen)>>5);
if (!rt->rt6i_peer)
rt6_bind_peer(rt, 1);
res = inet_peer_xrlim_allow(rt->rt6i_peer, tmo);
peer = rt6_get_peer_create(rt);
res = inet_peer_xrlim_allow(peer, tmo);
}
dst_release(dst);
return res;

11
net/ipv6/ip6_output.c
View File

@ -463,6 +463,7 @@ int ip6_forward(struct sk_buff *skb)
*/
if (skb->dev == dst->dev && opt->srcrt == 0 && !skb_sec_path(skb)) {
struct in6_addr *target = NULL;
struct inet_peer *peer;
struct rt6_info *rt;
/*
@ -476,13 +477,12 @@ int ip6_forward(struct sk_buff *skb)
else
target = &hdr->daddr;
if (!rt->rt6i_peer)
rt6_bind_peer(rt, 1);
peer = rt6_get_peer_create(rt);
/* Limit redirects both by destination (here)
and by source (inside ndisc_send_redirect)
*/
if (inet_peer_xrlim_allow(rt->rt6i_peer, 1*HZ))
if (inet_peer_xrlim_allow(peer, 1*HZ))
ndisc_send_redirect(skb, target);
} else {
int addrtype = ipv6_addr_type(&hdr->saddr);
@ -602,11 +602,8 @@ void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt)
int old, new;
if (rt && !(rt->dst.flags & DST_NOPEER)) {
struct inet_peer *peer;
struct inet_peer *peer = rt6_get_peer_create(rt);
if (!rt->rt6i_peer)
rt6_bind_peer(rt, 1);
peer = rt->rt6i_peer;
if (peer) {
fhdr->identification = htonl(inet_getid(peer, 0));
return;

6
net/ipv6/ndisc.c
View File

@ -1472,6 +1472,7 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
struct net *net = dev_net(dev);
struct sock *sk = net->ipv6.ndisc_sk;
int len = sizeof(struct icmp6hdr) + 2 * sizeof(struct in6_addr);
struct inet_peer *peer;
struct sk_buff *buff;
struct icmp6hdr *icmph;
struct in6_addr saddr_buf;
@ -1518,9 +1519,8 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
"Redirect: destination is not a neighbour\n");
goto release;
}
if (!rt->rt6i_peer)
rt6_bind_peer(rt, 1);
if (!inet_peer_xrlim_allow(rt->rt6i_peer, 1*HZ))
peer = rt6_get_peer_create(rt);
if (!inet_peer_xrlim_allow(peer, 1*HZ))
goto release;
if (dev->addr_len) {

5
net/ipv6/route.c
View File

@ -99,10 +99,7 @@ static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old)
if (!(rt->dst.flags & DST_HOST))
return NULL;
if (!rt->rt6i_peer)
rt6_bind_peer(rt, 1);
peer = rt->rt6i_peer;
peer = rt6_get_peer_create(rt);
if (peer) {
u32 *old_p = __DST_METRICS_PTR(old);
unsigned long prev, new;

4
net/ipv6/tcp_ipv6.c
View File

@ -1744,9 +1744,7 @@ static struct inet_peer *tcp_v6_get_peer(struct sock *sk, bool *release_it)
peer = inet_getpeer_v6(net, &np->daddr, 1);
*release_it = true;
} else {
if (!rt->rt6i_peer)
rt6_bind_peer(rt, 1);
peer = rt->rt6i_peer;
peer = rt6_get_peer_create(rt);
*release_it = false;
}