mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Jesper Dangaard Brouer](/assets/img/avatar_default.png)
Giving *_user.c side tools access to map_data[] provides easier access to information on the maps being loaded. Still provide the guarantee that the order maps are being defined in inside the _kern.c file corresponds with the order in the array. Now user tools are not blind, but can inspect and verify the maps that got loaded from the ELF binary. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
#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
|