From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jamal Hadi Salim Subject: [net-next PATCH 3/5] Support to encoding decoding skb prio on IFE action Date: Mon, 22 Feb 2016 08:21:42 -0500 Message-ID: <1456147304-13355-4-git-send-email-jhs@emojatatu.com> References: <1456147304-13355-1-git-send-email-jhs@emojatatu.com> Cc: netdev@vger.kernel.org, daniel@iogearbox.net, xiyou.wangcong@gmail.com, alexei.starovoitov@gmail.com, Jamal Hadi Salim To: davem@davemloft.net Return-path: Received: from mail-io0-f177.google.com ([209.85.223.177]:33879 "EHLO mail-io0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754217AbcBVNWC (ORCPT ); Mon, 22 Feb 2016 08:22:02 -0500 Received: by mail-io0-f177.google.com with SMTP id 9so177815534iom.1 for ; Mon, 22 Feb 2016 05:22:02 -0800 (PST) In-Reply-To: <1456147304-13355-1-git-send-email-jhs@emojatatu.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Jamal Hadi Salim Example usage: Set the skb priority using skbedit then allow it to be encoded sudo tc qdisc add dev $ETH root handle 1: prio sudo tc filter add dev $ETH parent 1: protocol ip prio 10 \ u32 match ip protocol 1 0xff flowid 1:2 \ action skbedit prio 17 \ action ife encode \ allow prio \ dst 02:15:15:15:15:15 Note: You dont need the skbedit action if you are already encoding the skb priority earlier. A zero skb priority will not be sent Alternative hard code static priority of decimal 33 (unlike skbedit) then mark of 0x12 every time the filter matches sudo $TC filter add dev $ETH parent 1: protocol ip prio 10 \ u32 match ip protocol 1 0xff flowid 1:2 \ action ife encode \ type 0xDEAD \ use prio 33 \ use mark 0x12 \ dst 02:15:15:15:15:15 Signed-off-by: Jamal Hadi Salim --- net/sched/Kconfig | 5 +++ net/sched/Makefile | 1 + net/sched/act_meta_skbprio.c | 80 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 86 insertions(+) create mode 100644 net/sched/act_meta_skbprio.c diff --git a/net/sched/Kconfig b/net/sched/Kconfig index 85854c0..b148302 100644 --- a/net/sched/Kconfig +++ b/net/sched/Kconfig @@ -756,6 +756,11 @@ config NET_IFE_SKBMARK depends on NET_ACT_IFE ---help--- +config NET_IFE_SKBPRIO + tristate "Support to encoding decoding skb prio on IFE action" + depends on NET_ACT_IFE + ---help--- + config NET_CLS_IND bool "Incoming device classification" depends on NET_CLS_U32 || NET_CLS_FW diff --git a/net/sched/Makefile b/net/sched/Makefile index 3f7a182..84bddb3 100644 --- a/net/sched/Makefile +++ b/net/sched/Makefile @@ -21,6 +21,7 @@ obj-$(CONFIG_NET_ACT_BPF) += act_bpf.o obj-$(CONFIG_NET_ACT_CONNMARK) += act_connmark.o obj-$(CONFIG_NET_ACT_IFE) += act_ife.o obj-$(CONFIG_NET_IFE_SKBMARK) += act_meta_mark.o +obj-$(CONFIG_NET_IFE_SKBPRIO) += act_meta_skbprio.o obj-$(CONFIG_NET_SCH_FIFO) += sch_fifo.o obj-$(CONFIG_NET_SCH_CBQ) += sch_cbq.o obj-$(CONFIG_NET_SCH_HTB) += sch_htb.o diff --git a/net/sched/act_meta_skbprio.c b/net/sched/act_meta_skbprio.c new file mode 100644 index 0000000..ceaab8c --- /dev/null +++ b/net/sched/act_meta_skbprio.c @@ -0,0 +1,80 @@ +/* + * net/sched/act_meta_prio.c IFE skb->priority metadata module + * + * 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. + * + * copyright Jamal Hadi Salim (2015) + * +*/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static int skbprio_check(struct sk_buff *skb, struct tcf_meta_info *e) +{ + return check_meta_u32(skb->priority, e); +} + +static int skbprio_encode(struct sk_buff *skb, void *skbdata, + struct tcf_meta_info *e) +{ + u32 ifeprio = skb->priority; /* avoid having to cast skb->priority*/ + + pr_emerg("encode skbprio %d\n", ifeprio); + return encode_meta_u32(ifeprio, skbdata, e); +} + +static int skbprio_decode(struct sk_buff *skb, void *data, u16 len) +{ + u32 ifeprio = *(u32 *) data; + + skb->priority = ntohl(ifeprio); + pr_emerg("decode skbprio %d\n", skb->priority); + return 0; +} + +static struct tcf_meta_ops ife_prio_ops = { + .metaid = IFE_META_PRIO, + .metatype = NLA_U32, + .name = "skbprio", + .synopsis = "skb prio metadata", + .check_presence = skbprio_check, + .encode = skbprio_encode, + .decode = skbprio_decode, + .get = get_meta_u32, + .alloc = alloc_meta_u32, + .owner = THIS_MODULE, +}; + +static int __init ifeprio_init_module(void) +{ + pr_info("Loaded IFE skb prio\n"); + return register_ife_op(&ife_prio_ops); +} + +static void __exit ifeprio_cleanup_module(void) +{ + unregister_ife_op(&ife_prio_ops); + pr_info("Unloaded IFE skb prio\n"); +} + +module_init(ifeprio_init_module); +module_exit(ifeprio_cleanup_module); + +MODULE_AUTHOR("Jamal Hadi Salim(2015)"); +MODULE_DESCRIPTION("Inter-FE skb prio metadata action"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS_IFE_META(IFE_META_PRIO); -- 1.9.1