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shared: add bpf-program helpers

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Add helpers to:
- Create new BPFProgram instance from a path in bpf
filesystem and bpf attach type;
- Pin a program to bpf fs;
- Get BPF program ID by BPF program FD.
This commit is contained in:
Julia Kartseva
2021-04-09 20:28:47 -07:00
parent a442ccb4eb
commit f23f0ead1f
2 changed files with 84 additions and 1 deletions
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src/shared/bpf-program.h
+4 -1
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@@ -26,8 +26,9 @@ struct BPFProgram {
};
int bpf_program_new(uint32_t prog_type, BPFProgram **ret);
BPFProgram *bpf_program_unref(BPFProgram *p);
int bpf_program_new_from_bpffs_path(const char *path, BPFProgram **ret);
BPFProgram *bpf_program_ref(BPFProgram *p);
BPFProgram *bpf_program_unref(BPFProgram *p);
int bpf_program_add_instructions(BPFProgram *p, const struct bpf_insn *insn, size_t count);
int bpf_program_load_kernel(BPFProgram *p, char *log_buf, size_t log_size);
@@ -35,6 +36,8 @@ int bpf_program_load_from_bpf_fs(BPFProgram *p, const char *path);
int bpf_program_cgroup_attach(BPFProgram *p, int type, const char *path, uint32_t flags);
int bpf_program_cgroup_detach(BPFProgram *p);
int bpf_program_pin(int prog_fd, const char *bpffs_path);
int bpf_program_get_id_by_fd(int prog_fd, uint32_t *ret_id);
int bpf_map_new(enum bpf_map_type type, size_t key_size, size_t value_size, size_t max_entries, uint32_t flags);
int bpf_map_update_element(int fd, const void *key, void *value);