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sctp: re-use sctp_transport_pmtu in sctp_transport_route 

sctp_transport_route currently is very similar to sctp_transport_pmtu plus
a few other bits.

This patch reuses sctp_transport_pmtu in sctp_transport_route and removes
the duplicated code.

Also, as all calls to sctp_transport_route were forcing the dst release
before calling it, let's just include such release too.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marcelo Ricardo Leitner 2018-04-26 16:58:59 -03:00 committed by David S. Miller
parent 22d7be267e
commit 6e91b578bf
2 changed files with 19 additions and 22 deletions
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6
net/sctp/socket.c
View File

@ -644,16 +644,15 @@ static int sctp_send_asconf_add_ip(struct sock *sk,
list_for_each_entry(trans,
&asoc->peer.transport_addr_list, transports) {
/* Clear the source and route cache */
sctp_transport_dst_release(trans);
trans->cwnd = min(4*asoc->pathmtu, max_t(__u32,
2*asoc->pathmtu, 4380));
trans->ssthresh = asoc->peer.i.a_rwnd;
trans->rto = asoc->rto_initial;
sctp_max_rto(asoc, trans);
trans->rtt = trans->srtt = trans->rttvar = 0;
/* Clear the source and route cache */
sctp_transport_route(trans, NULL,
sctp_sk(asoc->base.sk));
sctp_sk(asoc->base.sk));
}
}
retval = sctp_send_asconf(asoc, chunk);
@ -896,7 +895,6 @@ skip_mkasconf:
*/
list_for_each_entry(transport, &asoc->peer.transport_addr_list,
transports) {
sctp_transport_dst_release(transport);
sctp_transport_route(transport, NULL,
sctp_sk(asoc->base.sk));
}

35
net/sctp/transport.c
View File

@ -242,6 +242,15 @@ void sctp_transport_pmtu(struct sctp_transport *transport, struct sock *sk)
&transport->fl, sk);
}
if (transport->param_flags & SPP_PMTUD_DISABLE) {
struct sctp_association *asoc = transport->asoc;
if (!transport->pathmtu && asoc && asoc->pathmtu)
transport->pathmtu = asoc->pathmtu;
if (transport->pathmtu)
return;
}
if (transport->dst)
transport->pathmtu = sctp_dst_mtu(transport->dst);
else
@ -290,6 +299,7 @@ void sctp_transport_route(struct sctp_transport *transport,
struct sctp_association *asoc = transport->asoc;
struct sctp_af *af = transport->af_specific;
sctp_transport_dst_release(transport);
af->get_dst(transport, saddr, &transport->fl, sctp_opt2sk(opt));
if (saddr)
@ -297,25 +307,14 @@ void sctp_transport_route(struct sctp_transport *transport,
else
af->get_saddr(opt, transport, &transport->fl);
if ((transport->param_flags & SPP_PMTUD_DISABLE) && transport->pathmtu) {
return;
}
if (transport->dst) {
transport->pathmtu = SCTP_TRUNC4(dst_mtu(transport->dst));
sctp_transport_pmtu(transport, sctp_opt2sk(opt));
/* Initialize sk->sk_rcv_saddr, if the transport is the
* association's active path for getsockname().
*/
if (asoc && (!asoc->peer.primary_path ||
(transport == asoc->peer.active_path)))
opt->pf->to_sk_saddr(&transport->saddr,
asoc->base.sk);
} else if ((transport->param_flags & SPP_PMTUD_DISABLE) &&
asoc && asoc->pathmtu) {
transport->pathmtu = asoc->pathmtu;
} else {
transport->pathmtu = SCTP_DEFAULT_MAXSEGMENT;
}
/* Initialize sk->sk_rcv_saddr, if the transport is the
* association's active path for getsockname().
*/
if (transport->dst && asoc &&
(!asoc->peer.primary_path || transport == asoc->peer.active_path))
opt->pf->to_sk_saddr(&transport->saddr, asoc->base.sk);
}
/* Hold a reference to a transport. */