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88eea53954
Allow to retrieve uds path from the environment, facilitates also dealing with export a bit. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/*
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* tc_bpf.h BPF common code
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*
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* This program is free software; you can distribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Daniel Borkmann <dborkman@redhat.com>
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* Jiri Pirko <jiri@resnulli.us>
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*/
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#ifndef _TC_BPF_H_
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#define _TC_BPF_H_ 1
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#include <linux/filter.h>
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h>
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#include <linux/bpf.h>
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#include <sys/syscall.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdint.h>
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#include "utils.h"
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#include "bpf_scm.h"
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#define BPF_ENV_UDS "TC_BPF_UDS"
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int bpf_parse_string(char *arg, bool from_file, __u16 *bpf_len,
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char **bpf_string, bool *need_release,
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const char separator);
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int bpf_parse_ops(int argc, char **argv, struct sock_filter *bpf_ops,
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bool from_file);
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void bpf_print_ops(FILE *f, struct rtattr *bpf_ops, __u16 len);
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const char *bpf_default_section(const enum bpf_prog_type type);
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#ifdef HAVE_ELF
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int bpf_open_object(const char *path, enum bpf_prog_type type,
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const char *sec, bool verbose);
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int bpf_send_map_fds(const char *path, const char *obj);
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int bpf_recv_map_fds(const char *path, int *fds, struct bpf_map_aux *aux,
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unsigned int entries);
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static inline __u64 bpf_ptr_to_u64(const void *ptr)
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{
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return (__u64) (unsigned long) ptr;
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}
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static inline int bpf(int cmd, union bpf_attr *attr, unsigned int size)
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{
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#ifdef __NR_bpf
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return syscall(__NR_bpf, cmd, attr, size);
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#else
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fprintf(stderr, "No bpf syscall, kernel headers too old?\n");
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errno = ENOSYS;
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return -1;
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#endif
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}
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#else
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static inline int bpf_open_object(const char *path, enum bpf_prog_type type,
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const char *sec, bool verbose)
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{
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fprintf(stderr, "No ELF library support compiled in.\n");
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errno = ENOSYS;
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return -1;
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}
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static inline int bpf_send_map_fds(const char *path, const char *obj)
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{
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return 0;
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}
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static inline int bpf_recv_map_fds(const char *path, int *fds,
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struct bpf_map_aux *aux,
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unsigned int entries)
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{
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return -1;
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}
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#endif /* HAVE_ELF */
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#endif /* _TC_BPF_H_ */
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