From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Xin Long <lucien.xin@gmail.com>,
"David S. Miller" <davem@davemloft.net>
Subject: [PATCH 5.7 14/20] sctp: shrink stream outq only when new outcnt < old outcnt
Date: Thu, 30 Jul 2020 10:04:04 +0200 [thread overview]
Message-ID: <20200730074421.201786211@linuxfoundation.org> (raw)
In-Reply-To: <20200730074420.533211699@linuxfoundation.org>
From: Xin Long <lucien.xin@gmail.com>
[ Upstream commit 8f13399db22f909a35735bf8ae2f932e0c8f0e30 ]
It's not necessary to go list_for_each for outq->out_chunk_list
when new outcnt >= old outcnt, as no chunk with higher sid than
new (outcnt - 1) exists in the outqueue.
While at it, also move the list_for_each code in a new function
sctp_stream_shrink_out(), which will be used in the next patch.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/sctp/stream.c | 21 ++++++++++++++-------
1 file changed, 14 insertions(+), 7 deletions(-)
--- a/net/sctp/stream.c
+++ b/net/sctp/stream.c
@@ -22,17 +22,11 @@
#include <net/sctp/sm.h>
#include <net/sctp/stream_sched.h>
-/* Migrates chunks from stream queues to new stream queues if needed,
- * but not across associations. Also, removes those chunks to streams
- * higher than the new max.
- */
-static void sctp_stream_outq_migrate(struct sctp_stream *stream,
- struct sctp_stream *new, __u16 outcnt)
+static void sctp_stream_shrink_out(struct sctp_stream *stream, __u16 outcnt)
{
struct sctp_association *asoc;
struct sctp_chunk *ch, *temp;
struct sctp_outq *outq;
- int i;
asoc = container_of(stream, struct sctp_association, stream);
outq = &asoc->outqueue;
@@ -56,6 +50,19 @@ static void sctp_stream_outq_migrate(str
sctp_chunk_free(ch);
}
+}
+
+/* Migrates chunks from stream queues to new stream queues if needed,
+ * but not across associations. Also, removes those chunks to streams
+ * higher than the new max.
+ */
+static void sctp_stream_outq_migrate(struct sctp_stream *stream,
+ struct sctp_stream *new, __u16 outcnt)
+{
+ int i;
+
+ if (stream->outcnt > outcnt)
+ sctp_stream_shrink_out(stream, outcnt);
if (new) {
/* Here we actually move the old ext stuff into the new
next prev parent reply other threads:[~2020-07-30 8:05 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-30 8:03 [PATCH 5.7 00/20] 5.7.12-rc1 review Greg Kroah-Hartman
2020-07-30 8:03 ` [PATCH 5.7 01/20] AX.25: Fix out-of-bounds read in ax25_connect() Greg Kroah-Hartman
2020-07-30 8:03 ` [PATCH 5.7 02/20] AX.25: Prevent out-of-bounds read in ax25_sendmsg() Greg Kroah-Hartman
2020-07-30 8:03 ` [PATCH 5.7 03/20] dev: Defer free of skbs in flush_backlog Greg Kroah-Hartman
2020-07-30 8:03 ` [PATCH 5.7 04/20] drivers/net/wan/x25_asy: Fix to make it work Greg Kroah-Hartman
2020-07-30 8:03 ` [PATCH 5.7 05/20] ip6_gre: fix null-ptr-deref in ip6gre_init_net() Greg Kroah-Hartman
2020-07-30 8:03 ` [PATCH 5.7 06/20] net/sched: act_ct: fix restore the qdisc_skb_cb after defrag Greg Kroah-Hartman
2020-07-30 8:03 ` [PATCH 5.7 07/20] net-sysfs: add a newline when printing tx_timeout by sysfs Greg Kroah-Hartman
2020-07-30 8:03 ` [PATCH 5.7 08/20] net: udp: Fix wrong clean up for IS_UDPLITE macro Greg Kroah-Hartman
2020-07-30 8:03 ` [PATCH 5.7 09/20] qrtr: orphan socket in qrtr_release() Greg Kroah-Hartman
2020-07-30 8:04 ` [PATCH 5.7 10/20] rtnetlink: Fix memory(net_device) leak when ->newlink fails Greg Kroah-Hartman
2020-07-30 8:04 ` [PATCH 5.7 11/20] rxrpc: Fix sendmsg() returning EPIPE due to recvmsg() returning ENODATA Greg Kroah-Hartman
2020-07-30 8:04 ` [PATCH 5.7 12/20] tcp: allow at most one TLP probe per flight Greg Kroah-Hartman
2020-07-30 8:04 ` [PATCH 5.7 13/20] AX.25: Prevent integer overflows in connect and sendmsg Greg Kroah-Hartman
2020-07-30 8:04 ` Greg Kroah-Hartman [this message]
2020-07-30 8:04 ` [PATCH 5.7 15/20] sctp: shrink stream outq when fails to do addstream reconf Greg Kroah-Hartman
2020-07-30 8:04 ` [PATCH 5.7 16/20] udp: Copy has_conns in reuseport_grow() Greg Kroah-Hartman
2020-07-30 8:04 ` [PATCH 5.7 17/20] udp: Improve load balancing for SO_REUSEPORT Greg Kroah-Hartman
2020-07-30 8:04 ` [PATCH 5.7 18/20] tipc: allow to build NACK message in link timeout function Greg Kroah-Hartman
2020-07-30 8:04 ` [PATCH 5.7 19/20] io_uring: ensure double poll additions work with both request types Greg Kroah-Hartman
2020-07-30 8:04 ` [PATCH 5.7 20/20] regmap: debugfs: check count when read regmap file Greg Kroah-Hartman
2020-07-30 16:48 ` [PATCH 5.7 00/20] 5.7.12-rc1 review Guenter Roeck
2020-07-31 17:15 ` Greg Kroah-Hartman
2020-07-31 8:59 ` Naresh Kamboju
2020-07-31 12:53 ` Jon Hunter
2020-07-31 17:15 ` Greg Kroah-Hartman
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