1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * net/sched/act_meta_mark.c IFE skb->mark metadata module 4 * 5 * copyright Jamal Hadi Salim (2015) 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/unaligned.h> 14 #include <linux/rtnetlink.h> 15 #include <linux/module.h> 16 #include <linux/init.h> 17 #include <net/netlink.h> 18 #include <net/pkt_sched.h> 19 #include <uapi/linux/tc_act/tc_ife.h> 20 #include <net/tc_act/tc_ife.h> 21 22 static int skbmark_encode(struct sk_buff *skb, void *skbdata, 23 struct tcf_meta_info *e) 24 { 25 u32 ifemark = skb->mark; 26 27 return ife_encode_meta_u32(ifemark, skbdata, e); 28 } 29 30 static int skbmark_decode(struct sk_buff *skb, void *data, u16 len) 31 { 32 if (len != sizeof(u32)) 33 return -EINVAL; 34 35 skb->mark = get_unaligned_be32(data); 36 return 0; 37 } 38 39 static int skbmark_check(struct sk_buff *skb, struct tcf_meta_info *e) 40 { 41 return ife_check_meta_u32(skb->mark, e); 42 } 43 44 static struct tcf_meta_ops ife_skbmark_ops = { 45 .metaid = IFE_META_SKBMARK, 46 .metatype = NLA_U32, 47 .name = "skbmark", 48 .synopsis = "skb mark 32 bit metadata", 49 .check_presence = skbmark_check, 50 .encode = skbmark_encode, 51 .decode = skbmark_decode, 52 .get = ife_get_meta_u32, 53 .alloc = ife_alloc_meta_u32, 54 .release = ife_release_meta_gen, 55 .validate = ife_validate_meta_u32, 56 .owner = THIS_MODULE, 57 }; 58 59 static int __init ifemark_init_module(void) 60 { 61 return register_ife_op(&ife_skbmark_ops); 62 } 63 64 static void __exit ifemark_cleanup_module(void) 65 { 66 unregister_ife_op(&ife_skbmark_ops); 67 } 68 69 module_init(ifemark_init_module); 70 module_exit(ifemark_cleanup_module); 71 72 MODULE_AUTHOR("Jamal Hadi Salim(2015)"); 73 MODULE_DESCRIPTION("Inter-FE skb mark metadata module"); 74 MODULE_LICENSE("GPL"); 75 MODULE_ALIAS_IFE_META("skbmark"); 76