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mptcp: Add MPTCP to skb extensions 

Add enum value for MPTCP and update config dependencies

v5 -> v6:
 - fixed '__unused' field size

Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mat Martineau 2020-01-09 07:59:19 -08:00 committed by David S. Miller
parent 1323059301
commit 3ee17bc78e
4 changed files with 48 additions and 0 deletions
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10
MAINTAINERS
View File

@ -11573,6 +11573,16 @@ F: net/ipv6/calipso.c
F: net/netfilter/xt_CONNSECMARK.c
F: net/netfilter/xt_SECMARK.c
NETWORKING [MPTCP]
M: Mat Martineau <mathew.j.martineau@linux.intel.com>
M: Matthieu Baerts <matthieu.baerts@tessares.net>
L: netdev@vger.kernel.org
L: mptcp@lists.01.org
W: https://github.com/multipath-tcp/mptcp_net-next/wiki
B: https://github.com/multipath-tcp/mptcp_net-next/issues
S: Maintained
F: include/net/mptcp.h
NETWORKING [TCP]
M: Eric Dumazet <edumazet@google.com>
L: netdev@vger.kernel.org

3
include/linux/skbuff.h
View File

@ -4096,6 +4096,9 @@ enum skb_ext_id {
#endif
#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
TC_SKB_EXT,
#endif
#if IS_ENABLED(CONFIG_MPTCP)
SKB_EXT_MPTCP,
#endif
SKB_EXT_NUM, /* must be last */
};

28
include/net/mptcp.h Normal file
View File

@ -0,0 +1,28 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Multipath TCP
*
* Copyright (c) 2017 - 2019, Intel Corporation.
*/
#ifndef __NET_MPTCP_H
#define __NET_MPTCP_H
#include <linux/types.h>
/* MPTCP sk_buff extension data */
struct mptcp_ext {
u64 data_ack;
u64 data_seq;
u32 subflow_seq;
u16 data_len;
u8 use_map:1,
dsn64:1,
data_fin:1,
use_ack:1,
ack64:1,
__unused:3;
/* one byte hole */
};
#endif /* __NET_MPTCP_H */

7
net/core/skbuff.c
View File

@ -68,6 +68,7 @@
#include <net/ip6_checksum.h>
#include <net/xfrm.h>
#include <net/mpls.h>
#include <net/mptcp.h>
#include <linux/uaccess.h>
#include <trace/events/skb.h>
@ -4109,6 +4110,9 @@ static const u8 skb_ext_type_len[] = {
#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
[TC_SKB_EXT] = SKB_EXT_CHUNKSIZEOF(struct tc_skb_ext),
#endif
#if IS_ENABLED(CONFIG_MPTCP)
[SKB_EXT_MPTCP] = SKB_EXT_CHUNKSIZEOF(struct mptcp_ext),
#endif
};
static __always_inline unsigned int skb_ext_total_length(void)
@ -4122,6 +4126,9 @@ static __always_inline unsigned int skb_ext_total_length(void)
#endif
#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
skb_ext_type_len[TC_SKB_EXT] +
#endif
#if IS_ENABLED(CONFIG_MPTCP)
skb_ext_type_len[SKB_EXT_MPTCP] +
#endif
0;
}