641 lines
18 KiB
Diff
641 lines
18 KiB
Diff
From 85fc2a6db8279c5e43c38ef7e715d14e57287997 Mon Sep 17 00:00:00 2001
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From: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
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Date: Wed, 13 Mar 2019 20:54:49 +0000
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Subject: [PATCH] net: sched: Backport Introduce act_ctinfo action
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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ctinfo is a new tc filter action module. It is designed to restore
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information contained in firewall conntrack marks to other packet fields
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and is typically used on packet ingress paths. At present it has two
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independent sub-functions or operating modes, DSCP restoration mode &
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skb mark restoration mode.
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The DSCP restore mode:
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This mode copies DSCP values that have been placed in the firewall
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conntrack mark back into the IPv4/v6 diffserv fields of relevant
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packets.
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The DSCP restoration is intended for use and has been found useful for
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restoring ingress classifications based on egress classifications across
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links that bleach or otherwise change DSCP, typically home ISP Internet
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links. Restoring DSCP on ingress on the WAN link allows qdiscs such as
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but by no means limited to CAKE to shape inbound packets according to
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policies that are easier to set & mark on egress.
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Ingress classification is traditionally a challenging task since
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iptables rules haven't yet run and tc filter/eBPF programs are pre-NAT
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lookups, hence are unable to see internal IPv4 addresses as used on the
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typical home masquerading gateway. Thus marking the connection in some
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manner on egress for later restoration of classification on ingress is
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easier to implement.
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Parameters related to DSCP restore mode:
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dscpmask - a 32 bit mask of 6 contiguous bits and indicate bits of the
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conntrack mark field contain the DSCP value to be restored.
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statemask - a 32 bit mask of (usually) 1 bit length, outside the area
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specified by dscpmask. This represents a conditional operation flag
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whereby the DSCP is only restored if the flag is set. This is useful to
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implement a 'one shot' iptables based classification where the
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'complicated' iptables rules are only run once to classify the
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connection on initial (egress) packet and subsequent packets are all
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marked/restored with the same DSCP. A mask of zero disables the
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conditional behaviour ie. the conntrack mark DSCP bits are always
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restored to the ip diffserv field (assuming the conntrack entry is found
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& the skb is an ipv4/ipv6 type)
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e.g. dscpmask 0xfc000000 statemask 0x01000000
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|----0xFC----conntrack mark----000000---|
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| Bits 31-26 | bit 25 | bit24 |~~~ Bit 0|
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| DSCP | unused | flag |unused |
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|-----------------------0x01---000000---|
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| |
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| |
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---| Conditional flag
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v only restore if set
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|-ip diffserv-|
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| 6 bits |
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|-------------|
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The skb mark restore mode (cpmark):
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This mode copies the firewall conntrack mark to the skb's mark field.
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It is completely the functional equivalent of the existing act_connmark
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action with the additional feature of being able to apply a mask to the
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restored value.
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Parameters related to skb mark restore mode:
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mask - a 32 bit mask applied to the firewall conntrack mark to mask out
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bits unwanted for restoration. This can be useful where the conntrack
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mark is being used for different purposes by different applications. If
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not specified and by default the whole mark field is copied (i.e.
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default mask of 0xffffffff)
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e.g. mask 0x00ffffff to mask out the top 8 bits being used by the
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aforementioned DSCP restore mode.
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|----0x00----conntrack mark----ffffff---|
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| Bits 31-24 | |
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| DSCP & flag| some value here |
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|---------------------------------------|
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v
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|------------skb mark-------------------|
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| | |
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| zeroed | |
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|---------------------------------------|
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Overall parameters:
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zone - conntrack zone
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control - action related control (reclassify | pipe | drop | continue |
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ok | goto chain <CHAIN_INDEX>)
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Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
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Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
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Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Backport
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Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
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---
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include/net/tc_act/tc_ctinfo.h | 33 +++
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include/uapi/linux/pkt_cls.h | 3 +-
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include/uapi/linux/tc_act/tc_ctinfo.h | 29 ++
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net/sched/Kconfig | 13 +
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net/sched/Makefile | 1 +
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net/sched/act_ctinfo.c | 405 ++++++++++++++++++++++++++
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6 files changed, 482 insertions(+), 1 deletion(-)
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create mode 100644 include/net/tc_act/tc_ctinfo.h
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create mode 100644 include/uapi/linux/tc_act/tc_ctinfo.h
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create mode 100644 net/sched/act_ctinfo.c
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--- /dev/null
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+++ b/include/net/tc_act/tc_ctinfo.h
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@@ -0,0 +1,33 @@
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+/* SPDX-License-Identifier: GPL-2.0 */
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+#ifndef __NET_TC_CTINFO_H
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+#define __NET_TC_CTINFO_H
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+
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+#include <net/act_api.h>
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+
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+struct tcf_ctinfo_params {
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+ struct rcu_head rcu;
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+ struct net *net;
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+ u32 dscpmask;
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+ u32 dscpstatemask;
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+ u32 cpmarkmask;
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+ u16 zone;
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+ u8 mode;
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+ u8 dscpmaskshift;
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+};
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+
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+struct tcf_ctinfo {
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+ struct tc_action common;
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+ struct tcf_ctinfo_params __rcu *params;
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+ u64 stats_dscp_set;
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+ u64 stats_dscp_error;
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+ u64 stats_cpmark_set;
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+};
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+
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+enum {
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+ CTINFO_MODE_DSCP = BIT(0),
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+ CTINFO_MODE_CPMARK = BIT(1)
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+};
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+
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+#define to_ctinfo(a) ((struct tcf_ctinfo *)a)
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+
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+#endif /* __NET_TC_CTINFO_H */
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--- a/include/uapi/linux/pkt_cls.h
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+++ b/include/uapi/linux/pkt_cls.h
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@@ -66,7 +66,8 @@ enum {
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TCA_ID_UNSPEC=0,
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TCA_ID_POLICE=1,
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/* other actions go here */
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- __TCA_ID_MAX=255
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+ TCA_ID_CTINFO=27,
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+ __TCA_ID_MAX = 255
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};
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#define TCA_ID_MAX __TCA_ID_MAX
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--- /dev/null
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+++ b/include/uapi/linux/tc_act/tc_ctinfo.h
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@@ -0,0 +1,29 @@
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+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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+#ifndef __UAPI_TC_CTINFO_H
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+#define __UAPI_TC_CTINFO_H
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+
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+#include <linux/types.h>
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+#include <linux/pkt_cls.h>
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+
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+struct tc_ctinfo {
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+ tc_gen;
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+};
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+
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+enum {
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+ TCA_CTINFO_UNSPEC,
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+ TCA_CTINFO_PAD,
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+ TCA_CTINFO_TM,
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+ TCA_CTINFO_ACT,
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+ TCA_CTINFO_ZONE,
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+ TCA_CTINFO_PARMS_DSCP_MASK,
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+ TCA_CTINFO_PARMS_DSCP_STATEMASK,
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+ TCA_CTINFO_PARMS_CPMARK_MASK,
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+ TCA_CTINFO_STATS_DSCP_SET,
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+ TCA_CTINFO_STATS_DSCP_ERROR,
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+ TCA_CTINFO_STATS_CPMARK_SET,
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+ __TCA_CTINFO_MAX
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+};
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+
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+#define TCA_CTINFO_MAX (__TCA_CTINFO_MAX - 1)
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+
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+#endif
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--- a/net/sched/Kconfig
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+++ b/net/sched/Kconfig
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@@ -808,6 +808,19 @@ config NET_ACT_CONNMARK
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To compile this code as a module, choose M here: the
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module will be called act_connmark.
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+config NET_ACT_CTINFO
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+ tristate "Netfilter Connmark to DSCP Retriever"
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+ depends on NET_CLS_ACT && NETFILTER && IP_NF_IPTABLES
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+ depends on NF_CONNTRACK && NF_CONNTRACK_MARK
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+ help
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+ Say Y here to allow transfer of a connmark stored DSCP into
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+ ipv4/v6 diffserv
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+
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+ If unsure, say N.
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+
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+ To compile this code as a module, choose M here: the
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+ module will be called act_ctinfo.
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+
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config NET_ACT_SKBMOD
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tristate "skb data modification action"
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depends on NET_CLS_ACT
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--- a/net/sched/Makefile
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+++ b/net/sched/Makefile
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@@ -21,6 +21,7 @@ obj-$(CONFIG_NET_ACT_CSUM) += act_csum.o
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obj-$(CONFIG_NET_ACT_VLAN) += act_vlan.o
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obj-$(CONFIG_NET_ACT_BPF) += act_bpf.o
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obj-$(CONFIG_NET_ACT_CONNMARK) += act_connmark.o
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+obj-$(CONFIG_NET_ACT_CTINFO) += act_ctinfo.o
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obj-$(CONFIG_NET_ACT_SKBMOD) += act_skbmod.o
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obj-$(CONFIG_NET_ACT_IFE) += act_ife.o
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obj-$(CONFIG_NET_IFE_SKBMARK) += act_meta_mark.o
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--- /dev/null
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+++ b/net/sched/act_ctinfo.c
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@@ -0,0 +1,405 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/* net/sched/act_ctinfo.c netfilter ctinfo connmark actions
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+ *
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+ * Copyright (c) 2019 Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/init.h>
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+#include <linux/kernel.h>
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+#include <linux/skbuff.h>
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+#include <linux/rtnetlink.h>
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+#include <linux/pkt_cls.h>
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+#include <linux/ip.h>
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+#include <linux/ipv6.h>
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+#include <net/netlink.h>
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+#include <net/pkt_sched.h>
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+#include <net/act_api.h>
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+#include <net/pkt_cls.h>
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+#include <uapi/linux/tc_act/tc_ctinfo.h>
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+#include <net/tc_act/tc_ctinfo.h>
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+
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+#include <net/netfilter/nf_conntrack.h>
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+#include <net/netfilter/nf_conntrack_core.h>
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+#include <net/netfilter/nf_conntrack_ecache.h>
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+#include <net/netfilter/nf_conntrack_zones.h>
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+
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+static struct tc_action_ops act_ctinfo_ops;
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+static unsigned int ctinfo_net_id;
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+
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+static void tcf_ctinfo_dscp_set(struct nf_conn *ct, struct tcf_ctinfo *ca,
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+ struct tcf_ctinfo_params *cp,
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+ struct sk_buff *skb, int wlen, int proto)
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+{
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+ u8 dscp,newdscp;
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+
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+ newdscp = (((ct->mark & cp->dscpmask) >> cp->dscpmaskshift) << 2) &
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+ ~INET_ECN_MASK;
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+
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+ /* mark contains DSCP so restore DSCP bits from ct->mark into diffserv */
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+ /* using overlimits stats to count how many DSCP updates */
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+ switch (proto) {
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+ case NFPROTO_IPV4:
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+ dscp = ipv4_get_dsfield(ip_hdr(skb)) & ~INET_ECN_MASK;
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+ if (dscp != newdscp) {
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+ if (likely(!skb_try_make_writable(skb, wlen))) {
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+ ipv4_change_dsfield(ip_hdr(skb),
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+ INET_ECN_MASK,
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+ newdscp);
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+ ca->stats_dscp_set++;
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+ } else {
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+ ca->stats_dscp_error++;
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+ }
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+ }
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+ break;
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+ case NFPROTO_IPV6:
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+ dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & ~INET_ECN_MASK;
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+ if (dscp != newdscp) {
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+ if (likely(!skb_try_make_writable(skb, wlen))) {
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+ ipv6_change_dsfield(ipv6_hdr(skb),
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+ INET_ECN_MASK,
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+ newdscp);
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+ ca->stats_dscp_set++;
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+ } else {
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+ ca->stats_dscp_error++;
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+ }
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+ }
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+ break;
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+ default:
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+ break;
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+ }
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+}
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+
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+static void tcf_ctinfo_cpmark_set(struct nf_conn *ct, struct tcf_ctinfo *ca,
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+ struct tcf_ctinfo_params *cp,
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+ struct sk_buff *skb)
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+{
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+ ca->stats_cpmark_set++;
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+ skb->mark = ct->mark & cp->cpmarkmask;
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+}
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+
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+static int tcf_ctinfo_act(struct sk_buff *skb, const struct tc_action *a,
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+ struct tcf_result *res)
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+{
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+ const struct nf_conntrack_tuple_hash *thash = NULL;
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+ struct tcf_ctinfo *ca = to_ctinfo(a);
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+ struct nf_conntrack_tuple tuple;
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+ struct nf_conntrack_zone zone;
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+ enum ip_conntrack_info ctinfo;
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+ struct tcf_ctinfo_params *cp;
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+ struct nf_conn *ct;
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+ int proto, wlen;
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+ int action;
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+
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+ cp = rcu_dereference_bh(ca->params);
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+
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+ tcf_lastuse_update(&ca->tcf_tm);
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+ bstats_update(&ca->tcf_bstats, skb);
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+ action = READ_ONCE(ca->tcf_action);
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+
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+ wlen = skb_network_offset(skb);
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+ if (tc_skb_protocol(skb) == htons(ETH_P_IP)) {
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+ wlen += sizeof(struct iphdr);
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+ if (!pskb_may_pull(skb, wlen))
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+ goto out;
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+
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+ proto = NFPROTO_IPV4;
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+ } else if (tc_skb_protocol(skb) == htons(ETH_P_IPV6)) {
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+ wlen += sizeof(struct ipv6hdr);
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+ if (!pskb_may_pull(skb, wlen))
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+ goto out;
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+
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+ proto = NFPROTO_IPV6;
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+ } else {
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+ goto out;
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+ }
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+
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+ ct = nf_ct_get(skb, &ctinfo);
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+ if (!ct) { /* look harder, usually ingress */
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+ if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb),
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+ proto, cp->net, &tuple))
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+ goto out;
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+ zone.id = cp->zone;
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+ zone.dir = NF_CT_DEFAULT_ZONE_DIR;
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+
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+ thash = nf_conntrack_find_get(cp->net, &zone, &tuple);
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+ if (!thash)
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+ goto out;
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+
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+ ct = nf_ct_tuplehash_to_ctrack(thash);
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+ }
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+
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+ if (cp->mode & CTINFO_MODE_DSCP)
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+ if (!cp->dscpstatemask || (ct->mark & cp->dscpstatemask))
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+ tcf_ctinfo_dscp_set(ct, ca, cp, skb, wlen, proto);
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+
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+ if (cp->mode & CTINFO_MODE_CPMARK)
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+ tcf_ctinfo_cpmark_set(ct, ca, cp, skb);
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+
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+ if (thash)
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+ nf_ct_put(ct);
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+out:
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+ return action;
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+}
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+
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+static const struct nla_policy ctinfo_policy[TCA_CTINFO_MAX + 1] = {
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+ [TCA_CTINFO_ACT] = { .len = sizeof(struct
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+ tc_ctinfo) },
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+ [TCA_CTINFO_ZONE] = { .type = NLA_U16 },
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+ [TCA_CTINFO_PARMS_DSCP_MASK] = { .type = NLA_U32 },
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+ [TCA_CTINFO_PARMS_DSCP_STATEMASK] = { .type = NLA_U32 },
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+ [TCA_CTINFO_PARMS_CPMARK_MASK] = { .type = NLA_U32 },
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+};
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+
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+static int tcf_ctinfo_init(struct net *net, struct nlattr *nla,
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+ struct nlattr *est, struct tc_action **a,
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+ int ovr, int bind)
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+{
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+ struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
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+ struct nlattr *tb[TCA_CTINFO_MAX + 1];
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+ struct tcf_ctinfo_params *cp_new;
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+/* struct tcf_chain *goto_ch = NULL; */
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+ u32 dscpmask = 0, dscpstatemask;
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+ struct tc_ctinfo *actparm;
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+ struct tcf_ctinfo *ci;
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+ u8 dscpmaskshift;
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+ int ret = 0, err;
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+
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+ if (!nla)
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+ return -EINVAL;
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+
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+ err = nla_parse_nested(tb, TCA_CTINFO_MAX, nla, ctinfo_policy, NULL);
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+ if (err < 0)
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+ return err;
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+
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+ if (!tb[TCA_CTINFO_ACT])
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+ return -EINVAL;
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+ actparm = nla_data(tb[TCA_CTINFO_ACT]);
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+
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+ /* do some basic validation here before dynamically allocating things */
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+ /* that we would otherwise have to clean up. */
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+ if (tb[TCA_CTINFO_PARMS_DSCP_MASK]) {
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+ dscpmask = nla_get_u32(tb[TCA_CTINFO_PARMS_DSCP_MASK]);
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+ /* need contiguous 6 bit mask */
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+ dscpmaskshift = dscpmask ? __ffs(dscpmask) : 0;
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+ if ((~0 & (dscpmask >> dscpmaskshift)) != 0x3f)
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+ return -EINVAL;
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+ dscpstatemask = tb[TCA_CTINFO_PARMS_DSCP_STATEMASK] ?
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+ nla_get_u32(tb[TCA_CTINFO_PARMS_DSCP_STATEMASK]) : 0;
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+ /* mask & statemask must not overlap */
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+ if (dscpmask & dscpstatemask)
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+ return -EINVAL;
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+ }
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+ /* done the validation:now to the actual action allocation */
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+ err = tcf_idr_check(tn, actparm->index, a, bind);
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+ if (!err) {
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+ ret = tcf_idr_create(tn, actparm->index, est, a,
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+ &act_ctinfo_ops, bind, false);
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+ if (ret) {
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+ /* tcf_idr_cleanup(tn, actparm->index); */
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+ return ret;
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+ }
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+ ret = ACT_P_CREATED;
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+ } else if (err > 0) {
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+ if (bind) /* don't override defaults */
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+ return 0;
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+ if (!ovr) {
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+ tcf_idr_release(*a, bind);
|
|
+ return -EEXIST;
|
|
+ }
|
|
+ } else {
|
|
+ return err;
|
|
+ }
|
|
+
|
|
+/* err = tcf_action_check_ctrlact(actparm->action, tp, &goto_ch, extack);
|
|
+ if (err < 0)
|
|
+ goto release_idr;
|
|
+ */
|
|
+
|
|
+ ci = to_ctinfo(*a);
|
|
+
|
|
+ cp_new = kzalloc(sizeof(*cp_new), GFP_KERNEL);
|
|
+ if (unlikely(!cp_new)) {
|
|
+ err = -ENOMEM;
|
|
+ goto put_chain;
|
|
+ }
|
|
+
|
|
+ cp_new->net = net;
|
|
+ cp_new->zone = tb[TCA_CTINFO_ZONE] ?
|
|
+ nla_get_u16(tb[TCA_CTINFO_ZONE]) : 0;
|
|
+ if (dscpmask) {
|
|
+ cp_new->dscpmask = dscpmask;
|
|
+ cp_new->dscpmaskshift = dscpmaskshift;
|
|
+ cp_new->dscpstatemask = dscpstatemask;
|
|
+ cp_new->mode |= CTINFO_MODE_DSCP;
|
|
+ }
|
|
+
|
|
+ if (tb[TCA_CTINFO_PARMS_CPMARK_MASK]) {
|
|
+ cp_new->cpmarkmask = nla_get_u32(tb[TCA_CTINFO_PARMS_CPMARK_MASK]);
|
|
+ cp_new->mode |= CTINFO_MODE_CPMARK;
|
|
+ }
|
|
+
|
|
+ spin_lock_bh(&ci->tcf_lock);
|
|
+/* goto_ch = tcf_action_set_ctrlact(*a, actparm->action, goto_ch); */
|
|
+ ci->tcf_action = actparm->action;
|
|
+ rcu_swap_protected(ci->params, cp_new,
|
|
+ lockdep_is_held(&ci->tcf_lock));
|
|
+ spin_unlock_bh(&ci->tcf_lock);
|
|
+
|
|
+/* if (goto_ch)
|
|
+ tcf_chain_put_by_act(goto_ch); */
|
|
+ if (cp_new)
|
|
+ kfree_rcu(cp_new, rcu);
|
|
+
|
|
+ if (ret == ACT_P_CREATED)
|
|
+ tcf_idr_insert(tn, *a);
|
|
+
|
|
+ return ret;
|
|
+
|
|
+put_chain:
|
|
+/* if (goto_ch)
|
|
+ tcf_chain_put_by_act(goto_ch); */
|
|
+/*release_idr:*/
|
|
+ tcf_idr_release(*a, bind);
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static int tcf_ctinfo_dump(struct sk_buff *skb, struct tc_action *a,
|
|
+ int bind, int ref)
|
|
+{
|
|
+ struct tcf_ctinfo *ci = to_ctinfo(a);
|
|
+ struct tc_ctinfo opt = {
|
|
+ .index = ci->tcf_index,
|
|
+ .refcnt = ci->tcf_refcnt - ref,
|
|
+ .bindcnt = ci->tcf_bindcnt - bind,
|
|
+ };
|
|
+ unsigned char *b = skb_tail_pointer(skb);
|
|
+ struct tcf_ctinfo_params *cp;
|
|
+ struct tcf_t t;
|
|
+
|
|
+ spin_lock_bh(&ci->tcf_lock);
|
|
+ cp = rcu_dereference_protected(ci->params,
|
|
+ lockdep_is_held(&ci->tcf_lock));
|
|
+
|
|
+ tcf_tm_dump(&t, &ci->tcf_tm);
|
|
+ if (nla_put_64bit(skb, TCA_CTINFO_TM, sizeof(t), &t, TCA_CTINFO_PAD))
|
|
+ goto nla_put_failure;
|
|
+
|
|
+ opt.action = ci->tcf_action;
|
|
+ if (nla_put(skb, TCA_CTINFO_ACT, sizeof(opt), &opt))
|
|
+ goto nla_put_failure;
|
|
+
|
|
+ if (nla_put_u16(skb, TCA_CTINFO_ZONE, cp->zone))
|
|
+ goto nla_put_failure;
|
|
+
|
|
+ if (cp->mode & CTINFO_MODE_DSCP) {
|
|
+ if (nla_put_u32(skb, TCA_CTINFO_PARMS_DSCP_MASK,
|
|
+ cp->dscpmask))
|
|
+ goto nla_put_failure;
|
|
+ if (nla_put_u32(skb, TCA_CTINFO_PARMS_DSCP_STATEMASK,
|
|
+ cp->dscpstatemask))
|
|
+ goto nla_put_failure;
|
|
+ }
|
|
+
|
|
+ if (cp->mode & CTINFO_MODE_CPMARK) {
|
|
+ if (nla_put_u32(skb, TCA_CTINFO_PARMS_CPMARK_MASK,
|
|
+ cp->cpmarkmask))
|
|
+ goto nla_put_failure;
|
|
+ }
|
|
+
|
|
+ if (nla_put_u64_64bit(skb, TCA_CTINFO_STATS_DSCP_SET,
|
|
+ ci->stats_dscp_set, TCA_CTINFO_PAD))
|
|
+ goto nla_put_failure;
|
|
+
|
|
+ if (nla_put_u64_64bit(skb, TCA_CTINFO_STATS_DSCP_ERROR,
|
|
+ ci->stats_dscp_error, TCA_CTINFO_PAD))
|
|
+ goto nla_put_failure;
|
|
+
|
|
+ if (nla_put_u64_64bit(skb, TCA_CTINFO_STATS_CPMARK_SET,
|
|
+ ci->stats_cpmark_set, TCA_CTINFO_PAD))
|
|
+ goto nla_put_failure;
|
|
+
|
|
+ spin_unlock_bh(&ci->tcf_lock);
|
|
+ return skb->len;
|
|
+
|
|
+nla_put_failure:
|
|
+ spin_unlock_bh(&ci->tcf_lock);
|
|
+ nlmsg_trim(skb, b);
|
|
+ return -1;
|
|
+}
|
|
+
|
|
+static int tcf_ctinfo_walker(struct net *net, struct sk_buff *skb,
|
|
+ struct netlink_callback *cb, int type,
|
|
+ const struct tc_action_ops *ops)
|
|
+{
|
|
+ struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
|
|
+
|
|
+ return tcf_generic_walker(tn, skb, cb, type, ops);
|
|
+}
|
|
+
|
|
+static int tcf_ctinfo_search(struct net *net, struct tc_action **a, u32 index)
|
|
+{
|
|
+ struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
|
|
+
|
|
+ return tcf_idr_search(tn, a, index);
|
|
+}
|
|
+
|
|
+static void tcf_ctinfo_cleanup(struct tc_action *a, int bind)
|
|
+{
|
|
+ struct tcf_ctinfo *ci = to_ctinfo(a);
|
|
+ struct tcf_ctinfo_params *cp;
|
|
+
|
|
+ cp = rcu_dereference_protected(ci->params, 1);
|
|
+ if (cp)
|
|
+ kfree_rcu(cp, rcu);
|
|
+}
|
|
+
|
|
+static struct tc_action_ops act_ctinfo_ops = {
|
|
+ .kind = "ctinfo",
|
|
+ .type = TCA_ID_CTINFO,
|
|
+ .owner = THIS_MODULE,
|
|
+ .act = tcf_ctinfo_act,
|
|
+ .dump = tcf_ctinfo_dump,
|
|
+ .init = tcf_ctinfo_init,
|
|
+ .cleanup= tcf_ctinfo_cleanup,
|
|
+ .walk = tcf_ctinfo_walker,
|
|
+ .lookup = tcf_ctinfo_search,
|
|
+ .size = sizeof(struct tcf_ctinfo),
|
|
+};
|
|
+
|
|
+static __net_init int ctinfo_init_net(struct net *net)
|
|
+{
|
|
+ struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
|
|
+
|
|
+ return tc_action_net_init(net, tn, &act_ctinfo_ops);
|
|
+}
|
|
+
|
|
+static void __net_exit ctinfo_exit_net(struct net *net)
|
|
+{
|
|
+ struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
|
|
+
|
|
+ tc_action_net_exit(tn);
|
|
+}
|
|
+
|
|
+static struct pernet_operations ctinfo_net_ops = {
|
|
+ .init = ctinfo_init_net,
|
|
+ .exit = ctinfo_exit_net,
|
|
+ .id = &ctinfo_net_id,
|
|
+ .size = sizeof(struct tc_action_net),
|
|
+};
|
|
+
|
|
+static int __init ctinfo_init_module(void)
|
|
+{
|
|
+ return tcf_register_action(&act_ctinfo_ops, &ctinfo_net_ops);
|
|
+}
|
|
+
|
|
+static void __exit ctinfo_cleanup_module(void)
|
|
+{
|
|
+ tcf_unregister_action(&act_ctinfo_ops, &ctinfo_net_ops);
|
|
+}
|
|
+
|
|
+module_init(ctinfo_init_module);
|
|
+module_exit(ctinfo_cleanup_module);
|
|
+MODULE_AUTHOR("Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>");
|
|
+MODULE_DESCRIPTION("Conntrack mark to DSCP restoring");
|
|
+MODULE_LICENSE("GPL");
|