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authorJamal Hadi Salim <jhs@mojatatu.com>2016-02-27 08:08:55 -0500
committerDavid S. Miller <davem@davemloft.net>2016-03-01 17:15:23 -0500
commit084e2f6566d2a39c007ed6473f58b551a2eeefeb (patch)
tree5149ddc6b8d35e78dd8fa18f8c22ce54c507ade2 /net/sched/act_meta_mark.c
parentintroduce IFE action (diff)
downloadlinux-dev-084e2f6566d2a39c007ed6473f58b551a2eeefeb.tar.xz
linux-dev-084e2f6566d2a39c007ed6473f58b551a2eeefeb.zip
Support to encoding decoding skb mark on IFE action
Example usage: Set the skb 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 mark 17 \ action ife encode \ allow mark \ dst 02:15:15:15:15:15 Note: You dont need the skbedit action if you are already encoding the skb mark earlier. A zero skb mark, when seen, will not be encoded. Alternative hard code static 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 mark 0x12 \ dst 02:15:15:15:15:15 Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Acked-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/act_meta_mark.c')
-rw-r--r--net/sched/act_meta_mark.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/net/sched/act_meta_mark.c b/net/sched/act_meta_mark.c
new file mode 100644
index 000000000000..82892170ce4f
--- /dev/null
+++ b/net/sched/act_meta_mark.c
@@ -0,0 +1,79 @@
+/*
+ * net/sched/act_meta_mark.c IFE skb->mark 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 <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <net/netlink.h>
+#include <net/pkt_sched.h>
+#include <uapi/linux/tc_act/tc_ife.h>
+#include <net/tc_act/tc_ife.h>
+#include <linux/rtnetlink.h>
+
+static int skbmark_encode(struct sk_buff *skb, void *skbdata,
+ struct tcf_meta_info *e)
+{
+ u32 ifemark = skb->mark;
+
+ return ife_encode_meta_u32(ifemark, skbdata, e);
+}
+
+static int skbmark_decode(struct sk_buff *skb, void *data, u16 len)
+{
+ u32 ifemark = *(u32 *)data;
+
+ skb->mark = ntohl(ifemark);
+ return 0;
+}
+
+static int skbmark_check(struct sk_buff *skb, struct tcf_meta_info *e)
+{
+ return ife_check_meta_u32(skb->mark, e);
+}
+
+static struct tcf_meta_ops ife_skbmark_ops = {
+ .metaid = IFE_META_SKBMARK,
+ .metatype = NLA_U32,
+ .name = "skbmark",
+ .synopsis = "skb mark 32 bit metadata",
+ .check_presence = skbmark_check,
+ .encode = skbmark_encode,
+ .decode = skbmark_decode,
+ .get = ife_get_meta_u32,
+ .alloc = ife_alloc_meta_u32,
+ .release = ife_release_meta_gen,
+ .validate = ife_validate_meta_u32,
+ .owner = THIS_MODULE,
+};
+
+static int __init ifemark_init_module(void)
+{
+ return register_ife_op(&ife_skbmark_ops);
+}
+
+static void __exit ifemark_cleanup_module(void)
+{
+ unregister_ife_op(&ife_skbmark_ops);
+}
+
+module_init(ifemark_init_module);
+module_exit(ifemark_cleanup_module);
+
+MODULE_AUTHOR("Jamal Hadi Salim(2015)");
+MODULE_DESCRIPTION("Inter-FE skb mark metadata module");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_IFE_META(IFE_META_SKBMARK);