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Diffstat (limited to 'net/sctp/transport.c')
-rw-r--r--net/sctp/transport.c104
1 files changed, 51 insertions, 53 deletions
diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index 953c21e4af9..7dd672fa651 100644
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c
@@ -24,16 +24,12 @@
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with GNU CC; see the file COPYING. If not, write to
- * the Free Software Foundation, 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * along with GNU CC; see the file COPYING. If not, see
+ * <http://www.gnu.org/licenses/>.
*
* Please send any bug reports or fixes you make to the
* email address(es):
- * lksctp developers <lksctp-developers@lists.sourceforge.net>
- *
- * Or submit a bug report through the following website:
- * http://www.sf.net/projects/lksctp
+ * lksctp developers <linux-sctp@vger.kernel.org>
*
* Written or modified by:
* La Monte H.P. Yarroll <piggy@acm.org>
@@ -43,9 +39,6 @@
* Hui Huang <hui.huang@nokia.com>
* Sridhar Samudrala <sri@us.ibm.com>
* Ardelle Fan <ardelle.fan@intel.com>
- *
- * Any bugs reported given to us we will try to fix... any fixes shared will
- * be incorporated into the next SCTP release.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -79,7 +72,7 @@ static struct sctp_transport *sctp_transport_init(struct net *net,
*/
peer->rto = msecs_to_jiffies(net->sctp.rto_initial);
- peer->last_time_heard = jiffies;
+ peer->last_time_heard = ktime_get();
peer->last_time_ecne_reduced = jiffies;
peer->param_flags = SPP_HB_DISABLE |
@@ -116,14 +109,13 @@ struct sctp_transport *sctp_transport_new(struct net *net,
{
struct sctp_transport *transport;
- transport = t_new(struct sctp_transport, gfp);
+ transport = kzalloc(sizeof(*transport), gfp);
if (!transport)
goto fail;
if (!sctp_transport_init(net, transport, addr, gfp))
goto fail_init;
- transport->malloced = 1;
SCTP_DBG_OBJCNT_INC(transport);
return transport;
@@ -151,33 +143,43 @@ void sctp_transport_free(struct sctp_transport *transport)
* structure hang around in memory since we know
* the tranport is going away.
*/
- if (timer_pending(&transport->T3_rtx_timer) &&
- del_timer(&transport->T3_rtx_timer))
+ if (del_timer(&transport->T3_rtx_timer))
sctp_transport_put(transport);
/* Delete the ICMP proto unreachable timer if it's active. */
- if (timer_pending(&transport->proto_unreach_timer) &&
- del_timer(&transport->proto_unreach_timer))
+ if (del_timer(&transport->proto_unreach_timer))
sctp_association_put(transport->asoc);
sctp_transport_put(transport);
}
+static void sctp_transport_destroy_rcu(struct rcu_head *head)
+{
+ struct sctp_transport *transport;
+
+ transport = container_of(head, struct sctp_transport, rcu);
+
+ dst_release(transport->dst);
+ kfree(transport);
+ SCTP_DBG_OBJCNT_DEC(transport);
+}
+
/* Destroy the transport data structure.
* Assumes there are no more users of this structure.
*/
static void sctp_transport_destroy(struct sctp_transport *transport)
{
- SCTP_ASSERT(transport->dead, "Transport is not dead", return);
+ if (unlikely(!transport->dead)) {
+ WARN(1, "Attempt to destroy undead transport %p!\n", transport);
+ return;
+ }
+
+ sctp_packet_free(&transport->packet);
if (transport->asoc)
sctp_association_put(transport->asoc);
- sctp_packet_free(&transport->packet);
-
- dst_release(transport->dst);
- kfree(transport);
- SCTP_DBG_OBJCNT_DEC(transport);
+ call_rcu(&transport->rcu, sctp_transport_destroy_rcu);
}
/* Start T3_rtx timer if it is not already running and update the heartbeat
@@ -311,11 +313,9 @@ void sctp_transport_put(struct sctp_transport *transport)
/* Update transport's RTO based on the newly calculated RTT. */
void sctp_transport_update_rto(struct sctp_transport *tp, __u32 rtt)
{
- /* Check for valid transport. */
- SCTP_ASSERT(tp, "NULL transport", return);
-
- /* We should not be doing any RTO updates unless rto_pending is set. */
- SCTP_ASSERT(tp->rto_pending, "rto_pending not set", return);
+ if (unlikely(!tp->rto_pending))
+ /* We should not be doing any RTO updates unless rto_pending is set. */
+ pr_debug("%s: rto_pending not set on transport %p!\n", __func__, tp);
if (tp->rttvar || tp->srtt) {
struct net *net = sock_net(tp->asoc->base.sk);
@@ -331,7 +331,7 @@ void sctp_transport_update_rto(struct sctp_transport *tp, __u32 rtt)
* 1/8, rto_alpha would be expressed as 3.
*/
tp->rttvar = tp->rttvar - (tp->rttvar >> net->sctp.rto_beta)
- + ((abs(tp->srtt - rtt)) >> net->sctp.rto_beta);
+ + (((__u32)abs64((__s64)tp->srtt - (__s64)rtt)) >> net->sctp.rto_beta);
tp->srtt = tp->srtt - (tp->srtt >> net->sctp.rto_alpha)
+ (rtt >> net->sctp.rto_alpha);
} else {
@@ -363,6 +363,7 @@ void sctp_transport_update_rto(struct sctp_transport *tp, __u32 rtt)
if (tp->rto > tp->asoc->rto_max)
tp->rto = tp->asoc->rto_max;
+ sctp_max_rto(tp->asoc, tp);
tp->rtt = rtt;
/* Reset rto_pending so that a new RTT measurement is started when a
@@ -370,9 +371,8 @@ void sctp_transport_update_rto(struct sctp_transport *tp, __u32 rtt)
*/
tp->rto_pending = 0;
- SCTP_DEBUG_PRINTK("%s: transport: %p, rtt: %d, srtt: %d "
- "rttvar: %d, rto: %ld\n", __func__,
- tp, rtt, tp->srtt, tp->rttvar, tp->rto);
+ pr_debug("%s: transport:%p, rtt:%d, srtt:%d rttvar:%d, rto:%ld\n",
+ __func__, tp, rtt, tp->srtt, tp->rttvar, tp->rto);
}
/* This routine updates the transport's cwnd and partial_bytes_acked
@@ -426,12 +426,11 @@ void sctp_transport_raise_cwnd(struct sctp_transport *transport,
cwnd += pmtu;
else
cwnd += bytes_acked;
- SCTP_DEBUG_PRINTK("%s: SLOW START: transport: %p, "
- "bytes_acked: %d, cwnd: %d, ssthresh: %d, "
- "flight_size: %d, pba: %d\n",
- __func__,
- transport, bytes_acked, cwnd,
- ssthresh, flight_size, pba);
+
+ pr_debug("%s: slow start: transport:%p, bytes_acked:%d, "
+ "cwnd:%d, ssthresh:%d, flight_size:%d, pba:%d\n",
+ __func__, transport, bytes_acked, cwnd, ssthresh,
+ flight_size, pba);
} else {
/* RFC 2960 7.2.2 Whenever cwnd is greater than ssthresh,
* upon each SACK arrival that advances the Cumulative TSN Ack
@@ -452,12 +451,12 @@ void sctp_transport_raise_cwnd(struct sctp_transport *transport,
cwnd += pmtu;
pba = ((cwnd < pba) ? (pba - cwnd) : 0);
}
- SCTP_DEBUG_PRINTK("%s: CONGESTION AVOIDANCE: "
- "transport: %p, bytes_acked: %d, cwnd: %d, "
- "ssthresh: %d, flight_size: %d, pba: %d\n",
- __func__,
- transport, bytes_acked, cwnd,
- ssthresh, flight_size, pba);
+
+ pr_debug("%s: congestion avoidance: transport:%p, "
+ "bytes_acked:%d, cwnd:%d, ssthresh:%d, "
+ "flight_size:%d, pba:%d\n", __func__,
+ transport, bytes_acked, cwnd, ssthresh,
+ flight_size, pba);
}
transport->cwnd = cwnd;
@@ -551,10 +550,10 @@ void sctp_transport_lower_cwnd(struct sctp_transport *transport,
}
transport->partial_bytes_acked = 0;
- SCTP_DEBUG_PRINTK("%s: transport: %p reason: %d cwnd: "
- "%d ssthresh: %d\n", __func__,
- transport, reason,
- transport->cwnd, transport->ssthresh);
+
+ pr_debug("%s: transport:%p, reason:%d, cwnd:%d, ssthresh:%d\n",
+ __func__, transport, reason, transport->cwnd,
+ transport->ssthresh);
}
/* Apply Max.Burst limit to the congestion window:
@@ -573,7 +572,7 @@ void sctp_transport_burst_limited(struct sctp_transport *t)
u32 old_cwnd = t->cwnd;
u32 max_burst_bytes;
- if (t->burst_limited)
+ if (t->burst_limited || asoc->max_burst == 0)
return;
max_burst_bytes = t->flight_size + (asoc->max_burst * asoc->pathmtu);
@@ -620,6 +619,7 @@ void sctp_transport_reset(struct sctp_transport *t)
t->burst_limited = 0;
t->ssthresh = asoc->peer.i.a_rwnd;
t->rto = asoc->rto_initial;
+ sctp_max_rto(asoc, t);
t->rtt = 0;
t->srtt = 0;
t->rttvar = 0;
@@ -644,14 +644,12 @@ void sctp_transport_reset(struct sctp_transport *t)
void sctp_transport_immediate_rtx(struct sctp_transport *t)
{
/* Stop pending T3_rtx_timer */
- if (timer_pending(&t->T3_rtx_timer)) {
- (void)del_timer(&t->T3_rtx_timer);
+ if (del_timer(&t->T3_rtx_timer))
sctp_transport_put(t);
- }
+
sctp_retransmit(&t->asoc->outqueue, t, SCTP_RTXR_T3_RTX);
if (!timer_pending(&t->T3_rtx_timer)) {
if (!mod_timer(&t->T3_rtx_timer, jiffies + t->rto))
sctp_transport_hold(t);
}
- return;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 16:35:22 +0000