1 /* 2 * tc_bpf.h BPF common code 3 * 4 * This program is free software; you can distribute 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 * Authors: Daniel Borkmann <dborkman (at) redhat.com> 10 * Jiri Pirko <jiri (at) resnulli.us> 11 */ 12 13 #ifndef _TC_BPF_H_ 14 #define _TC_BPF_H_ 1 15 16 #include <linux/netlink.h> 17 #include <linux/bpf.h> 18 #include <linux/magic.h> 19 20 #include "utils.h" 21 #include "bpf_scm.h" 22 23 enum { 24 BPF_NLA_OPS_LEN = 0, 25 BPF_NLA_OPS, 26 BPF_NLA_FD, 27 BPF_NLA_NAME, 28 __BPF_NLA_MAX, 29 }; 30 31 #define BPF_NLA_MAX __BPF_NLA_MAX 32 33 #define BPF_ENV_UDS "TC_BPF_UDS" 34 #define BPF_ENV_MNT "TC_BPF_MNT" 35 #define BPF_ENV_NOLOG "TC_BPF_NOLOG" 36 37 #ifndef BPF_FS_MAGIC 38 # define BPF_FS_MAGIC 0xcafe4a11 39 #endif 40 41 #define BPF_DIR_MNT "/sys/fs/bpf" 42 43 #define BPF_DIR_TC "tc" 44 #define BPF_DIR_GLOBALS "globals" 45 46 #ifndef TRACEFS_MAGIC 47 # define TRACEFS_MAGIC 0x74726163 48 #endif 49 50 #define TRACE_DIR_MNT "/sys/kernel/tracing" 51 52 int bpf_trace_pipe(void); 53 const char *bpf_default_section(const enum bpf_prog_type type); 54 55 int bpf_parse_common(int *ptr_argc, char ***ptr_argv, const int *nla_tbl, 56 enum bpf_prog_type type, const char **ptr_object, 57 const char **ptr_uds_name, struct nlmsghdr *n); 58 int bpf_graft_map(const char *map_path, uint32_t *key, int argc, char **argv); 59 60 void bpf_print_ops(FILE *f, struct rtattr *bpf_ops, __u16 len); 61 62 #ifdef HAVE_ELF 63 int bpf_send_map_fds(const char *path, const char *obj); 64 int bpf_recv_map_fds(const char *path, int *fds, struct bpf_map_aux *aux, 65 unsigned int entries); 66 #else 67 static inline int bpf_send_map_fds(const char *path, const char *obj) 68 { 69 return 0; 70 } 71 72 static inline int bpf_recv_map_fds(const char *path, int *fds, 73 struct bpf_map_aux *aux, 74 unsigned int entries) 75 { 76 return -1; 77 } 78 #endif /* HAVE_ELF */ 79 #endif /* _TC_BPF_H_ */ 80
