diff options
| -rw-r--r-- | include/net/sctp/structs.h | 4 | ||||
| -rw-r--r-- | net/sctp/sm_statefuns.c | 15 | ||||
| -rw-r--r-- | net/sctp/transport.c | 41 |
3 files changed, 32 insertions, 28 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 32fc4a309df5..f3d414ed208e 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -1024,8 +1024,8 @@ bool sctp_transport_update_pmtu(struct sctp_transport *t, u32 pmtu); void sctp_transport_immediate_rtx(struct sctp_transport *); void sctp_transport_dst_release(struct sctp_transport *t); void sctp_transport_dst_confirm(struct sctp_transport *t); -void sctp_transport_pl_send(struct sctp_transport *t); -void sctp_transport_pl_recv(struct sctp_transport *t); +bool sctp_transport_pl_send(struct sctp_transport *t); +bool sctp_transport_pl_recv(struct sctp_transport *t); /* This is the structure we use to queue packets as they come into diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index 09a8f23ec709..32df65f68c12 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -1109,12 +1109,12 @@ enum sctp_disposition sctp_sf_send_probe(struct net *net, if (!sctp_transport_pl_enabled(transport)) return SCTP_DISPOSITION_CONSUME; - sctp_transport_pl_send(transport); - - reply = sctp_make_heartbeat(asoc, transport, transport->pl.probe_size); - if (!reply) - return SCTP_DISPOSITION_NOMEM; - sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(reply)); + if (sctp_transport_pl_send(transport)) { + reply = sctp_make_heartbeat(asoc, transport, transport->pl.probe_size); + if (!reply) + return SCTP_DISPOSITION_NOMEM; + sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(reply)); + } sctp_add_cmd_sf(commands, SCTP_CMD_PROBE_TIMER_UPDATE, SCTP_TRANSPORT(transport)); @@ -1274,8 +1274,7 @@ enum sctp_disposition sctp_sf_backbeat_8_3(struct net *net, !sctp_transport_pl_enabled(link)) return SCTP_DISPOSITION_DISCARD; - sctp_transport_pl_recv(link); - if (link->pl.state == SCTP_PL_COMPLETE) + if (sctp_transport_pl_recv(link)) return SCTP_DISPOSITION_CONSUME; return sctp_sf_send_probe(net, ep, asoc, type, link, commands); diff --git a/net/sctp/transport.c b/net/sctp/transport.c index 397a6244dd97..23e7bd3e3bd4 100644 --- a/net/sctp/transport.c +++ b/net/sctp/transport.c @@ -258,16 +258,12 @@ void sctp_transport_pmtu(struct sctp_transport *transport, struct sock *sk) sctp_transport_pl_update(transport); } -void sctp_transport_pl_send(struct sctp_transport *t) +bool sctp_transport_pl_send(struct sctp_transport *t) { - pr_debug("%s: PLPMTUD: transport: %p, state: %d, pmtu: %d, size: %d, high: %d\n", - __func__, t, t->pl.state, t->pl.pmtu, t->pl.probe_size, t->pl.probe_high); - - if (t->pl.probe_count < SCTP_MAX_PROBES) { - t->pl.probe_count++; - return; - } + if (t->pl.probe_count < SCTP_MAX_PROBES) + goto out; + t->pl.probe_count = 0; if (t->pl.state == SCTP_PL_BASE) { if (t->pl.probe_size == SCTP_BASE_PLPMTU) { /* BASE_PLPMTU Confirmation Failed */ t->pl.state = SCTP_PL_ERROR; /* Base -> Error */ @@ -299,10 +295,20 @@ void sctp_transport_pl_send(struct sctp_transport *t) sctp_assoc_sync_pmtu(t->asoc); } } - t->pl.probe_count = 1; + +out: + if (t->pl.state == SCTP_PL_COMPLETE && t->pl.raise_count < 30 && + !t->pl.probe_count) + t->pl.raise_count++; + + pr_debug("%s: PLPMTUD: transport: %p, state: %d, pmtu: %d, size: %d, high: %d\n", + __func__, t, t->pl.state, t->pl.pmtu, t->pl.probe_size, t->pl.probe_high); + + t->pl.probe_count++; + return true; } -void sctp_transport_pl_recv(struct sctp_transport *t) +bool sctp_transport_pl_recv(struct sctp_transport *t) { pr_debug("%s: PLPMTUD: transport: %p, state: %d, pmtu: %d, size: %d, high: %d\n", __func__, t, t->pl.state, t->pl.pmtu, t->pl.probe_size, t->pl.probe_high); @@ -323,7 +329,7 @@ void sctp_transport_pl_recv(struct sctp_transport *t) if (!t->pl.probe_high) { t->pl.probe_size = min(t->pl.probe_size + SCTP_PL_BIG_STEP, SCTP_MAX_PLPMTU); - return; + return false; } t->pl.probe_size += SCTP_PL_MIN_STEP; if (t->pl.probe_size >= t->pl.probe_high) { @@ -335,14 +341,13 @@ void sctp_transport_pl_recv(struct sctp_transport *t) t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t); sctp_assoc_sync_pmtu(t->asoc); } - } else if (t->pl.state == SCTP_PL_COMPLETE) { - t->pl.raise_count++; - if (t->pl.raise_count == 30) { - /* Raise probe_size again after 30 * interval in Search Complete */ - t->pl.state = SCTP_PL_SEARCH; /* Search Complete -> Search */ - t->pl.probe_size += SCTP_PL_MIN_STEP; - } + } else if (t->pl.state == SCTP_PL_COMPLETE && t->pl.raise_count == 30) { + /* Raise probe_size again after 30 * interval in Search Complete */ + t->pl.state = SCTP_PL_SEARCH; /* Search Complete -> Search */ + t->pl.probe_size += SCTP_PL_MIN_STEP; } + + return t->pl.state == SCTP_PL_COMPLETE; } static bool sctp_transport_pl_toobig(struct sctp_transport *t, u32 pmtu) |