[linux-block.git] / samples / bpf / bpf_load.h

#ifndef __BPF_LOAD_H
#define __BPF_LOAD_H

#include "libbpf.h"

#define MAX_MAPS 32
#define MAX_PROGS 32

struct bpf_map_def {
	unsigned int type;
	unsigned int key_size;
	unsigned int value_size;
	unsigned int max_entries;
	unsigned int map_flags;
	unsigned int inner_map_idx;
};

struct bpf_map_data {
	int fd;
	char *name;
	size_t elf_offset;
	struct bpf_map_def def;
};

typedef void (*fixup_map_cb)(struct bpf_map_data *map, int idx);

extern int prog_fd[MAX_PROGS];
extern int event_fd[MAX_PROGS];
extern char bpf_log_buf[BPF_LOG_BUF_SIZE];
extern int prog_cnt;

/* There is a one-to-one mapping between map_fd[] and map_data[].
 * The map_data[] just contains more rich info on the given map.
 */
extern int map_fd[MAX_MAPS];
extern struct bpf_map_data map_data[MAX_MAPS];
extern int map_data_count;

/* parses elf file compiled by llvm .c->.o
 * . parses 'maps' section and creates maps via BPF syscall
 * . parses 'license' section and passes it to syscall
 * . parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns by
 *   storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD
 * . loads eBPF programs via BPF syscall
 *
 * One ELF file can contain multiple BPF programs which will be loaded
 * and their FDs stored stored in prog_fd array
 *
 * returns zero on success
 */
int load_bpf_file(char *path);
int load_bpf_file_fixup_map(const char *path, fixup_map_cb fixup_map);

void read_trace_pipe(void);
struct ksym {
	long addr;
	char *name;
};

int load_kallsyms(void);
struct ksym *ksym_search(long key);
int set_link_xdp_fd(int ifindex, int fd, __u32 flags);
#endif
Commit	Line	Data
249b812d AS	1	#ifndef __BPF_LOAD_H
	2	#define __BPF_LOAD_H
	3
d40fc181 JS	4	#include "libbpf.h"
d40fc181 JS	5
249b812d AS	6	#define MAX_MAPS 32
	7	#define MAX_PROGS 32
	8
9fd63d05 MKL	9	struct bpf_map_def {
	10	unsigned int type;
	11	unsigned int key_size;
	12	unsigned int value_size;
	13	unsigned int max_entries;
	14	unsigned int map_flags;
	15	unsigned int inner_map_idx;
	16	};
	17
6979bcc7 JDB	18	struct bpf_map_data {
	19	int fd;
	20	char *name;
	21	size_t elf_offset;
	22	struct bpf_map_def def;
	23	};
	24
	25	typedef void (fixup_map_cb)(struct bpf_map_data map, int idx);
9fd63d05	26
249b812d	27	extern int prog_fd[MAX_PROGS];
b896c4f9	28	extern int event_fd[MAX_PROGS];
d40fc181	29	extern char bpf_log_buf[BPF_LOG_BUF_SIZE];
4f2e7ae5	30	extern int prog_cnt;
249b812d	31
9178b4c1 JDB	32	/* There is a one-to-one mapping between map_fd[] and map_data[].
	33	* The map_data[] just contains more rich info on the given map.
	34	*/
	35	extern int map_fd[MAX_MAPS];
	36	extern struct bpf_map_data map_data[MAX_MAPS];
	37	extern int map_data_count;
	38
249b812d AS	39	/* parses elf file compiled by llvm .c->.o
	40	* . parses 'maps' section and creates maps via BPF syscall
	41	* . parses 'license' section and passes it to syscall
	42	* . parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns by
	43	* storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD
	44	* . loads eBPF programs via BPF syscall
	45	*
	46	* One ELF file can contain multiple BPF programs which will be loaded
	47	* and their FDs stored stored in prog_fd array
	48	*
	49	* returns zero on success
	50	*/
	51	int load_bpf_file(char *path);
9fd63d05	52	int load_bpf_file_fixup_map(const char *path, fixup_map_cb fixup_map);
249b812d	53
b896c4f9	54	void read_trace_pipe(void);
3622e7e4 AS	55	struct ksym {
	56	long addr;
	57	char *name;
	58	};
b896c4f9	59
3622e7e4 AS	60	int load_kallsyms(void);
3622e7e4 AS	61	struct ksym *ksym_search(long key);
6387d011	62	int set_link_xdp_fd(int ifindex, int fd, __u32 flags);
249b812d	63	#endif