1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * net/sched/act_meta_tc_index.c IFE skb->tc_index metadata module 4 * 5 * copyright Jamal Hadi Salim (2016) 6 */ 7 8 #include <linux/types.h> 9 #include <linux/kernel.h> 10 #include <linux/string.h> 11 #include <linux/errno.h> 12 #include <linux/skbuff.h> 13 #include <linux/rtnetlink.h> 14 #include <linux/module.h> 15 #include <linux/init.h> 16 #include <net/netlink.h> 17 #include <net/pkt_sched.h> 18 #include <uapi/linux/tc_act/tc_ife.h> 19 #include <net/tc_act/tc_ife.h> 20 21 static int skbtcindex_encode(struct sk_buff *skb, void *skbdata, 22 struct tcf_meta_info *e) 23 { 24 u32 ifetc_index = skb->tc_index; 25 26 return ife_encode_meta_u16(ifetc_index, skbdata, e); 27 } 28 29 static int skbtcindex_decode(struct sk_buff *skb, void *data, u16 len) 30 { 31 u16 ifetc_index = *(u16 *)data; 32 33 skb->tc_index = ntohs(ifetc_index); 34 return 0; 35 } 36 37 static int skbtcindex_check(struct sk_buff *skb, struct tcf_meta_info *e) 38 { 39 return ife_check_meta_u16(skb->tc_index, e); 40 } 41 42 static struct tcf_meta_ops ife_skbtcindex_ops = { 43 .metaid = IFE_META_TCINDEX, 44 .metatype = NLA_U16, 45 .name = "tc_index", 46 .synopsis = "skb tc_index 16 bit metadata", 47 .check_presence = skbtcindex_check, 48 .encode = skbtcindex_encode, 49 .decode = skbtcindex_decode, 50 .get = ife_get_meta_u16, 51 .alloc = ife_alloc_meta_u16, 52 .release = ife_release_meta_gen, 53 .validate = ife_validate_meta_u16, 54 .owner = THIS_MODULE, 55 }; 56 57 static int __init ifetc_index_init_module(void) 58 { 59 return register_ife_op(&ife_skbtcindex_ops); 60 } 61 62 static void __exit ifetc_index_cleanup_module(void) 63 { 64 unregister_ife_op(&ife_skbtcindex_ops); 65 } 66 67 module_init(ifetc_index_init_module); 68 module_exit(ifetc_index_cleanup_module); 69 70 MODULE_AUTHOR("Jamal Hadi Salim(2016)"); 71 MODULE_DESCRIPTION("Inter-FE skb tc_index metadata module"); 72 MODULE_LICENSE("GPL"); 73 MODULE_ALIAS_IFE_META("tcindex"); 74