github.com/datadog/cilium@v1.6.12/bpf/lib/xdp.h (about) 1 /* 2 * Copyright (C) 2017 Authors of Cilium 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __LIB_XDP_H_ 19 #define __LIB_XDP_H_ 20 21 #include <stdbool.h> 22 23 struct lpm_v4_key { 24 struct bpf_lpm_trie_key lpm; 25 __u8 addr[4]; 26 }; 27 28 struct lpm_v6_key { 29 struct bpf_lpm_trie_key lpm; 30 __u8 addr[16]; 31 }; 32 33 struct lpm_val { 34 /* Just dummy for now. */ 35 __u8 flags; 36 }; 37 38 static __always_inline void *xdp_data(const struct xdp_md *xdp) 39 { 40 return (void *)(unsigned long)xdp->data; 41 } 42 43 static __always_inline void *xdp_data_end(const struct xdp_md *xdp) 44 { 45 return (void *)(unsigned long)xdp->data_end; 46 } 47 48 static __always_inline bool xdp_no_room(const void *needed, const void *limit) 49 { 50 return unlikely(needed > limit); 51 } 52 53 #endif /* __LIB_XDP_H_ */