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sctp: clean up route lookup calls

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Change the call to take the transport parameter and set the
cached 'dst' appropriately inside the get_dst() function calls.

This will allow us in the future  to clean up source address
storage as well.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich 2011-04-26 21:54:17 +00:00 committed by David S. Miller
parent af1384703f
commit da0420bee2
4 changed files with 24 additions and 31 deletions
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3
include/net/sctp/structs.h
View File

@ -564,8 +564,7 @@ struct sctp_af {
int optname,
char __user *optval,
int __user *optlen);
struct dst_entry *(*get_dst) (struct sctp_association *asoc,
union sctp_addr *daddr,
void (*get_dst) (struct sctp_transport *t,
union sctp_addr *saddr,
struct flowi *fl,
struct sock *sk);

17
net/sctp/ipv6.c
View File

@ -247,17 +247,16 @@ static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport)
/* Returns the dst cache entry for the given source and destination ip
* addresses.
*/
static struct dst_entry *sctp_v6_get_dst(struct sctp_association *asoc,
union sctp_addr *daddr,
union sctp_addr *saddr,
struct flowi *fl,
struct sock *sk)
static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
struct flowi *fl, struct sock *sk)
{
struct sctp_association *asoc = t->asoc;
struct dst_entry *dst = NULL;
struct flowi6 *fl6 = &fl->u.ip6;
struct sctp_bind_addr *bp;
struct sctp_sockaddr_entry *laddr;
union sctp_addr *baddr = NULL;
union sctp_addr *daddr = &t->ipaddr;
union sctp_addr dst_saddr;
__u8 matchlen = 0;
__u8 bmatchlen;
@ -270,7 +269,6 @@ static struct dst_entry *sctp_v6_get_dst(struct sctp_association *asoc,
if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL)
fl6->flowi6_oif = daddr->v6.sin6_scope_id;
SCTP_DEBUG_PRINTK("%s: DST=%pI6 ", __func__, &fl6->daddr);
if (asoc)
@ -343,12 +341,13 @@ static struct dst_entry *sctp_v6_get_dst(struct sctp_association *asoc,
if (!IS_ERR(dst)) {
struct rt6_info *rt;
rt = (struct rt6_info *)dst;
t->dst = dst;
SCTP_DEBUG_PRINTK("rt6_dst:%pI6 rt6_src:%pI6\n",
&rt->rt6i_dst.addr, &fl6->saddr);
return dst;
} else {
t->dst = NULL;
SCTP_DEBUG_PRINTK("NO ROUTE\n");
}
SCTP_DEBUG_PRINTK("NO ROUTE\n");
return NULL;
}
/* Returns the number of consecutive initial bits that match in the 2 ipv6

12
net/sctp/protocol.c
View File

@ -463,17 +463,16 @@ static sctp_scope_t sctp_v4_scope(union sctp_addr *addr)
* addresses. If an association is passed, trys to get a dst entry with a
* source address that matches an address in the bind address list.
*/
static struct dst_entry *sctp_v4_get_dst(struct sctp_association *asoc,
union sctp_addr *daddr,
union sctp_addr *saddr,
struct flowi *fl,
struct sock *sk)
static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
struct flowi *fl, struct sock *sk)
{
struct sctp_association *asoc = t->asoc;
struct rtable *rt;
struct flowi4 *fl4 = &fl->u.ip4;
struct sctp_bind_addr *bp;
struct sctp_sockaddr_entry *laddr;
struct dst_entry *dst = NULL;
union sctp_addr *daddr = &t->ipaddr;
union sctp_addr dst_saddr;
memset(fl4, 0x0, sizeof(struct flowi4));
@ -548,13 +547,12 @@ static struct dst_entry *sctp_v4_get_dst(struct sctp_association *asoc,
out_unlock:
rcu_read_unlock();
out:
t->dst = dst;
if (dst)
SCTP_DEBUG_PRINTK("rt_dst:%pI4, rt_src:%pI4\n",
&rt->rt_dst, &rt->rt_src);
else
SCTP_DEBUG_PRINTK("NO ROUTE\n");
return dst;
}
/* For v4, the source address is cached in the route entry(dst). So no need

23
net/sctp/transport.c
View File

@ -213,17 +213,17 @@ void sctp_transport_set_owner(struct sctp_transport *transport,
/* Initialize the pmtu of a transport. */
void sctp_transport_pmtu(struct sctp_transport *transport, struct sock *sk)
{
struct dst_entry *dst;
struct flowi fl;
dst = transport->af_specific->get_dst(transport->asoc,
&transport->ipaddr,
&transport->saddr,
/* If we don't have a fresh route, look one up */
if (!transport->dst || transport->dst->obsolete > 1) {
dst_release(transport->dst);
transport->af_specific->get_dst(transport, &transport->saddr,
&fl, sk);
}
if (dst) {
transport->pathmtu = dst_mtu(dst);
dst_release(dst);
if (transport->dst) {
transport->pathmtu = dst_mtu(transport->dst);
} else
transport->pathmtu = SCTP_DEFAULT_MAXSEGMENT;
}
@ -274,12 +274,9 @@ void sctp_transport_route(struct sctp_transport *transport,
{
struct sctp_association *asoc = transport->asoc;
struct sctp_af *af = transport->af_specific;
union sctp_addr *daddr = &transport->ipaddr;
struct dst_entry *dst;
struct flowi fl;
dst = af->get_dst(asoc, daddr, saddr, &fl, sctp_opt2sk(opt));
transport->dst = dst;
af->get_dst(transport, saddr, &fl, sctp_opt2sk(opt));
if (saddr)
memcpy(&transport->saddr, saddr, sizeof(union sctp_addr));
@ -289,8 +286,8 @@ void sctp_transport_route(struct sctp_transport *transport,
if ((transport->param_flags & SPP_PMTUD_DISABLE) && transport->pathmtu) {
return;
}
if (dst) {
transport->pathmtu = dst_mtu(dst);
if (transport->dst) {
transport->pathmtu = dst_mtu(transport->dst);
/* Initialize sk->sk_rcv_saddr, if the transport is the
* association's active path for getsockname().