This patch just adds initial offloading bits, just to ease reviewing of
the next one. It will be merged with GSO patch itself in the actual
submission.
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
---
include/linux/skbuff.h | 2 ++
include/net/sctp/sctp.h | 4 ++++
net/sctp/Makefile | 3 ++-
net/sctp/offload.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
net/sctp/protocol.c | 3 +++
5 files changed, 58 insertions(+), 1 deletion(-)
create mode 100644 net/sctp/offload.c
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 11f935c1a090419d6cda938aa925bfa79de3616b..7d0b02ad241b5c5936aea6b66941e42867f2e9e0 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -481,6 +481,8 @@ enum {
SKB_GSO_UDP_TUNNEL_CSUM = 1 << 11,
SKB_GSO_TUNNEL_REMCSUM = 1 << 12,
+
+ SKB_GSO_SCTP = 1 << 13,
};
#if BITS_PER_LONG > 32
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index 835aa2ed987092634a4242314e9eabb51d1e4e35..4b1159188525f193a11af95700e91f88b10268b6 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -165,6 +165,10 @@ void sctp_assocs_proc_exit(struct net *net);
int sctp_remaddr_proc_init(struct net *net);
void sctp_remaddr_proc_exit(struct net *net);
+/*
+ * sctp/offload.c
+ */
+int sctp_offload_init(void);
/*
* Module global variables
diff --git a/net/sctp/Makefile b/net/sctp/Makefile
index 3b4ffb021cf1728353b5311e519604759a03b617..a89d3f51604d1474b72ee10b9d9c6a2200c2ed9d 100644
--- a/net/sctp/Makefile
+++ b/net/sctp/Makefile
@@ -10,7 +10,8 @@ sctp-y := sm_statetable.o sm_statefuns.o sm_sideeffect.o \
transport.o chunk.o sm_make_chunk.o ulpevent.o \
inqueue.o outqueue.o ulpqueue.o \
tsnmap.o bind_addr.o socket.o primitive.o \
- output.o input.o debug.o ssnmap.o auth.o
+ output.o input.o debug.o ssnmap.o auth.o \
+ offload.o
sctp_probe-y := probe.o
diff --git a/net/sctp/offload.c b/net/sctp/offload.c
new file mode 100644
index 0000000000000000000000000000000000000000..7080a6318da7110c1688dd0c5bb240356dbd0cd3
--- /dev/null
+++ b/net/sctp/offload.c
@@ -0,0 +1,47 @@
+/*
+ * sctp_offload - GRO/GSO Offloading for SCTP
+ *
+ * Copyright (C) 2015, Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/kprobes.h>
+#include <linux/socket.h>
+#include <linux/sctp.h>
+#include <linux/proc_fs.h>
+#include <linux/vmalloc.h>
+#include <linux/module.h>
+#include <linux/kfifo.h>
+#include <linux/time.h>
+#include <net/net_namespace.h>
+
+#include <linux/skbuff.h>
+#include <net/sctp/sctp.h>
+#include <net/sctp/checksum.h>
+#include <net/protocol.h>
+
+static const struct net_offload sctp_offload = {
+ .callbacks = {
+ },
+};
+
+int __init sctp_offload_init(void)
+{
+ return inet_add_offload(&sctp_offload, IPPROTO_SCTP);
+}
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index ab0d538a74ed593571cfaef02cd1bb7ce872abe6..a63464e56e46f046cb73f589c844e0203b96a5cd 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1485,6 +1485,9 @@ static __init int sctp_init(void)
if (status)
goto err_v6_add_protocol;
+ if (sctp_offload_init() < 0)
+ pr_crit("%s: Cannot add SCTP protocol offload\n", __func__);
+
out:
return status;
err_v6_add_protocol:
--
2.5.0
--
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