1 /* 2 * net/sched/act_meta_tc_index.c IFE skb->tc_index metadata module 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 * 9 * copyright Jamal Hadi Salim (2016) 10 * 11 */ 12 13 #include <linux/types.h> 14 #include <linux/kernel.h> 15 #include <linux/string.h> 16 #include <linux/errno.h> 17 #include <linux/skbuff.h> 18 #include <linux/rtnetlink.h> 19 #include <linux/module.h> 20 #include <linux/init.h> 21 #include <net/netlink.h> 22 #include <net/pkt_sched.h> 23 #include <uapi/linux/tc_act/tc_ife.h> 24 #include <net/tc_act/tc_ife.h> 25 #include <linux/rtnetlink.h> 26 27 static int skbtcindex_encode(struct sk_buff *skb, void *skbdata, 28 struct tcf_meta_info *e) 29 { 30 u32 ifetc_index = skb->tc_index; 31 32 return ife_encode_meta_u16(ifetc_index, skbdata, e); 33 } 34 35 static int skbtcindex_decode(struct sk_buff *skb, void *data, u16 len) 36 { 37 u16 ifetc_index = *(u16 *)data; 38 39 skb->tc_index = ntohs(ifetc_index); 40 return 0; 41 } 42 43 static int skbtcindex_check(struct sk_buff *skb, struct tcf_meta_info *e) 44 { 45 return ife_check_meta_u16(skb->tc_index, e); 46 } 47 48 static struct tcf_meta_ops ife_skbtcindex_ops = { 49 .metaid = IFE_META_TCINDEX, 50 .metatype = NLA_U16, 51 .name = "tc_index", 52 .synopsis = "skb tc_index 16 bit metadata", 53 .check_presence = skbtcindex_check, 54 .encode = skbtcindex_encode, 55 .decode = skbtcindex_decode, 56 .get = ife_get_meta_u16, 57 .alloc = ife_alloc_meta_u16, 58 .release = ife_release_meta_gen, 59 .validate = ife_validate_meta_u16, 60 .owner = THIS_MODULE, 61 }; 62 63 static int __init ifetc_index_init_module(void) 64 { 65 return register_ife_op(&ife_skbtcindex_ops); 66 } 67 68 static void __exit ifetc_index_cleanup_module(void) 69 { 70 unregister_ife_op(&ife_skbtcindex_ops); 71 } 72 73 module_init(ifetc_index_init_module); 74 module_exit(ifetc_index_cleanup_module); 75 76 MODULE_AUTHOR("Jamal Hadi Salim(2016)"); 77 MODULE_DESCRIPTION("Inter-FE skb tc_index metadata module"); 78 MODULE_LICENSE("GPL"); 79 MODULE_ALIAS_IFE_META(IFE_META_SKBTCINDEX); 80