diff options
| author | Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> | 2018-04-26 16:58:57 -0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-04-27 14:35:23 -0400 |
| commit | 6ff0f871c20ec1769a481edca86f23c76b2b06d3 (patch) | |
| tree | 9fa281c225263df1e1b00e12adfeedfdb6e690f1 | |
| parent | 2521680e1830c21033efe48322829044c6e6b32b (diff) | |
sctp: introduce sctp_dst_mtu
Which makes sure that the MTU respects the minimum value of
SCTP_DEFAULT_MINSEGMENT and that it is correctly aligned.
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/sctp/sctp.h | 9 | ||||
| -rw-r--r-- | net/sctp/associola.c | 6 | ||||
| -rw-r--r-- | net/sctp/transport.c | 6 |
3 files changed, 12 insertions, 9 deletions
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h index e327acad8e7d..4965cbfa7d92 100644 --- a/include/net/sctp/sctp.h +++ b/include/net/sctp/sctp.h @@ -600,10 +600,15 @@ static inline __u32 sctp_mtu_payload(const struct sctp_sock *sp, return mtu ? mtu - overhead : overhead; } +static inline __u32 sctp_dst_mtu(const struct dst_entry *dst) +{ + return SCTP_TRUNC4(max_t(__u32, dst_mtu(dst), + SCTP_DEFAULT_MINSEGMENT)); +} + static inline bool sctp_transport_pmtu_check(struct sctp_transport *t) { - __u32 pmtu = max_t(size_t, SCTP_TRUNC4(dst_mtu(t->dst)), - SCTP_DEFAULT_MINSEGMENT); + __u32 pmtu = sctp_dst_mtu(t->dst); if (t->pathmtu == pmtu) return true; diff --git a/net/sctp/associola.c b/net/sctp/associola.c index a29025418b96..039fdb862b17 100644 --- a/net/sctp/associola.c +++ b/net/sctp/associola.c @@ -1405,11 +1405,9 @@ void sctp_assoc_sync_pmtu(struct sctp_association *asoc) return; /* Get the lowest pmtu of all the transports. */ - list_for_each_entry(t, &asoc->peer.transport_addr_list, - transports) { + list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) { if (t->pmtu_pending && t->dst) { - sctp_transport_update_pmtu( - t, SCTP_TRUNC4(dst_mtu(t->dst))); + sctp_transport_update_pmtu(t, sctp_dst_mtu(t->dst)); t->pmtu_pending = 0; } if (!pmtu || (t->pathmtu < pmtu)) diff --git a/net/sctp/transport.c b/net/sctp/transport.c index c5fc3aed08a1..ed73a9d91b83 100644 --- a/net/sctp/transport.c +++ b/net/sctp/transport.c @@ -242,9 +242,9 @@ void sctp_transport_pmtu(struct sctp_transport *transport, struct sock *sk) &transport->fl, sk); } - if (transport->dst) { - transport->pathmtu = SCTP_TRUNC4(dst_mtu(transport->dst)); - } else + if (transport->dst) + transport->pathmtu = sctp_dst_mtu(transport->dst); + else transport->pathmtu = SCTP_DEFAULT_MAXSEGMENT; } |