| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __BPF_HELPERS_H |
| #define __BPF_HELPERS_H |
| |
| /* helper macro to place programs, maps, license in |
| * different sections in elf_bpf file. Section names |
| * are interpreted by elf_bpf loader |
| */ |
| #define SEC(NAME) __attribute__((section(NAME), used)) |
| |
| /* helper functions called from eBPF programs written in C */ |
| static void *(*bpf_map_lookup_elem)(void *map, void *key) = |
| (void *) BPF_FUNC_map_lookup_elem; |
| static int (*bpf_map_update_elem)(void *map, void *key, void *value, |
| unsigned long long flags) = |
| (void *) BPF_FUNC_map_update_elem; |
| static int (*bpf_map_delete_elem)(void *map, void *key) = |
| (void *) BPF_FUNC_map_delete_elem; |
| static int (*bpf_probe_read)(void *dst, int size, void *unsafe_ptr) = |
| (void *) BPF_FUNC_probe_read; |
| static unsigned long long (*bpf_ktime_get_ns)(void) = |
| (void *) BPF_FUNC_ktime_get_ns; |
| static int (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) = |
| (void *) BPF_FUNC_trace_printk; |
| static void (*bpf_tail_call)(void *ctx, void *map, int index) = |
| (void *) BPF_FUNC_tail_call; |
| static unsigned long long (*bpf_get_smp_processor_id)(void) = |
| (void *) BPF_FUNC_get_smp_processor_id; |
| static unsigned long long (*bpf_get_current_pid_tgid)(void) = |
| (void *) BPF_FUNC_get_current_pid_tgid; |
| static unsigned long long (*bpf_get_current_uid_gid)(void) = |
| (void *) BPF_FUNC_get_current_uid_gid; |
| static int (*bpf_get_current_comm)(void *buf, int buf_size) = |
| (void *) BPF_FUNC_get_current_comm; |
| static unsigned long long (*bpf_perf_event_read)(void *map, |
| unsigned long long flags) = |
| (void *) BPF_FUNC_perf_event_read; |
| static int (*bpf_clone_redirect)(void *ctx, int ifindex, int flags) = |
| (void *) BPF_FUNC_clone_redirect; |
| static int (*bpf_redirect)(int ifindex, int flags) = |
| (void *) BPF_FUNC_redirect; |
| static int (*bpf_redirect_map)(void *map, int key, int flags) = |
| (void *) BPF_FUNC_redirect_map; |
| static int (*bpf_perf_event_output)(void *ctx, void *map, |
| unsigned long long flags, void *data, |
| int size) = |
| (void *) BPF_FUNC_perf_event_output; |
| static int (*bpf_get_stackid)(void *ctx, void *map, int flags) = |
| (void *) BPF_FUNC_get_stackid; |
| static int (*bpf_probe_write_user)(void *dst, void *src, int size) = |
| (void *) BPF_FUNC_probe_write_user; |
| static int (*bpf_current_task_under_cgroup)(void *map, int index) = |
| (void *) BPF_FUNC_current_task_under_cgroup; |
| static int (*bpf_skb_get_tunnel_key)(void *ctx, void *key, int size, int flags) = |
| (void *) BPF_FUNC_skb_get_tunnel_key; |
| static int (*bpf_skb_set_tunnel_key)(void *ctx, void *key, int size, int flags) = |
| (void *) BPF_FUNC_skb_set_tunnel_key; |
| static int (*bpf_skb_get_tunnel_opt)(void *ctx, void *md, int size) = |
| (void *) BPF_FUNC_skb_get_tunnel_opt; |
| static int (*bpf_skb_set_tunnel_opt)(void *ctx, void *md, int size) = |
| (void *) BPF_FUNC_skb_set_tunnel_opt; |
| static unsigned long long (*bpf_get_prandom_u32)(void) = |
| (void *) BPF_FUNC_get_prandom_u32; |
| static int (*bpf_xdp_adjust_head)(void *ctx, int offset) = |
| (void *) BPF_FUNC_xdp_adjust_head; |
| static int (*bpf_xdp_adjust_meta)(void *ctx, int offset) = |
| (void *) BPF_FUNC_xdp_adjust_meta; |
| static int (*bpf_setsockopt)(void *ctx, int level, int optname, void *optval, |
| int optlen) = |
| (void *) BPF_FUNC_setsockopt; |
| static int (*bpf_getsockopt)(void *ctx, int level, int optname, void *optval, |
| int optlen) = |
| (void *) BPF_FUNC_getsockopt; |
| static int (*bpf_sock_ops_cb_flags_set)(void *ctx, int flags) = |
| (void *) BPF_FUNC_sock_ops_cb_flags_set; |
| static int (*bpf_sk_redirect_map)(void *ctx, void *map, int key, int flags) = |
| (void *) BPF_FUNC_sk_redirect_map; |
| static int (*bpf_sk_redirect_hash)(void *ctx, void *map, void *key, int flags) = |
| (void *) BPF_FUNC_sk_redirect_hash; |
| static int (*bpf_sock_map_update)(void *map, void *key, void *value, |
| unsigned long long flags) = |
| (void *) BPF_FUNC_sock_map_update; |
| static int (*bpf_sock_hash_update)(void *map, void *key, void *value, |
| unsigned long long flags) = |
| (void *) BPF_FUNC_sock_hash_update; |
| static int (*bpf_perf_event_read_value)(void *map, unsigned long long flags, |
| void *buf, unsigned int buf_size) = |
| (void *) BPF_FUNC_perf_event_read_value; |
| static int (*bpf_perf_prog_read_value)(void *ctx, void *buf, |
| unsigned int buf_size) = |
| (void *) BPF_FUNC_perf_prog_read_value; |
| static int (*bpf_override_return)(void *ctx, unsigned long rc) = |
| (void *) BPF_FUNC_override_return; |
| static int (*bpf_msg_redirect_map)(void *ctx, void *map, int key, int flags) = |
| (void *) BPF_FUNC_msg_redirect_map; |
| static int (*bpf_msg_redirect_hash)(void *ctx, |
| void *map, void *key, int flags) = |
| (void *) BPF_FUNC_msg_redirect_hash; |
| static int (*bpf_msg_apply_bytes)(void *ctx, int len) = |
| (void *) BPF_FUNC_msg_apply_bytes; |
| static int (*bpf_msg_cork_bytes)(void *ctx, int len) = |
| (void *) BPF_FUNC_msg_cork_bytes; |
| static int (*bpf_msg_pull_data)(void *ctx, int start, int end, int flags) = |
| (void *) BPF_FUNC_msg_pull_data; |
| static int (*bpf_bind)(void *ctx, void *addr, int addr_len) = |
| (void *) BPF_FUNC_bind; |
| static int (*bpf_xdp_adjust_tail)(void *ctx, int offset) = |
| (void *) BPF_FUNC_xdp_adjust_tail; |
| static int (*bpf_skb_get_xfrm_state)(void *ctx, int index, void *state, |
| int size, int flags) = |
| (void *) BPF_FUNC_skb_get_xfrm_state; |
| static int (*bpf_get_stack)(void *ctx, void *buf, int size, int flags) = |
| (void *) BPF_FUNC_get_stack; |
| static int (*bpf_fib_lookup)(void *ctx, struct bpf_fib_lookup *params, |
| int plen, __u32 flags) = |
| (void *) BPF_FUNC_fib_lookup; |
| static int (*bpf_lwt_push_encap)(void *ctx, unsigned int type, void *hdr, |
| unsigned int len) = |
| (void *) BPF_FUNC_lwt_push_encap; |
| static int (*bpf_lwt_seg6_store_bytes)(void *ctx, unsigned int offset, |
| void *from, unsigned int len) = |
| (void *) BPF_FUNC_lwt_seg6_store_bytes; |
| static int (*bpf_lwt_seg6_action)(void *ctx, unsigned int action, void *param, |
| unsigned int param_len) = |
| (void *) BPF_FUNC_lwt_seg6_action; |
| static int (*bpf_lwt_seg6_adjust_srh)(void *ctx, unsigned int offset, |
| unsigned int len) = |
| (void *) BPF_FUNC_lwt_seg6_adjust_srh; |
| static int (*bpf_rc_repeat)(void *ctx) = |
| (void *) BPF_FUNC_rc_repeat; |
| static int (*bpf_rc_keydown)(void *ctx, unsigned int protocol, |
| unsigned long long scancode, unsigned int toggle) = |
| (void *) BPF_FUNC_rc_keydown; |
| static unsigned long long (*bpf_get_current_cgroup_id)(void) = |
| (void *) BPF_FUNC_get_current_cgroup_id; |
| |
| /* llvm builtin functions that eBPF C program may use to |
| * emit BPF_LD_ABS and BPF_LD_IND instructions |
| */ |
| struct sk_buff; |
| unsigned long long load_byte(void *skb, |
| unsigned long long off) asm("llvm.bpf.load.byte"); |
| unsigned long long load_half(void *skb, |
| unsigned long long off) asm("llvm.bpf.load.half"); |
| unsigned long long load_word(void *skb, |
| unsigned long long off) asm("llvm.bpf.load.word"); |
| |
| /* a helper structure used by eBPF C program |
| * to describe map attributes to elf_bpf loader |
| */ |
| 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; |
| unsigned int numa_node; |
| }; |
| |
| #define BPF_ANNOTATE_KV_PAIR(name, type_key, type_val) \ |
| struct ____btf_map_##name { \ |
| type_key key; \ |
| type_val value; \ |
| }; \ |
| struct ____btf_map_##name \ |
| __attribute__ ((section(".maps." #name), used)) \ |
| ____btf_map_##name = { } |
| |
| static int (*bpf_skb_load_bytes)(void *ctx, int off, void *to, int len) = |
| (void *) BPF_FUNC_skb_load_bytes; |
| static int (*bpf_skb_store_bytes)(void *ctx, int off, void *from, int len, int flags) = |
| (void *) BPF_FUNC_skb_store_bytes; |
| static int (*bpf_l3_csum_replace)(void *ctx, int off, int from, int to, int flags) = |
| (void *) BPF_FUNC_l3_csum_replace; |
| static int (*bpf_l4_csum_replace)(void *ctx, int off, int from, int to, int flags) = |
| (void *) BPF_FUNC_l4_csum_replace; |
| static int (*bpf_csum_diff)(void *from, int from_size, void *to, int to_size, int seed) = |
| (void *) BPF_FUNC_csum_diff; |
| static int (*bpf_skb_under_cgroup)(void *ctx, void *map, int index) = |
| (void *) BPF_FUNC_skb_under_cgroup; |
| static int (*bpf_skb_change_head)(void *, int len, int flags) = |
| (void *) BPF_FUNC_skb_change_head; |
| static int (*bpf_skb_pull_data)(void *, int len) = |
| (void *) BPF_FUNC_skb_pull_data; |
| |
| /* Scan the ARCH passed in from ARCH env variable (see Makefile) */ |
| #if defined(__TARGET_ARCH_x86) |
| #define bpf_target_x86 |
| #define bpf_target_defined |
| #elif defined(__TARGET_ARCH_s930x) |
| #define bpf_target_s930x |
| #define bpf_target_defined |
| #elif defined(__TARGET_ARCH_arm64) |
| #define bpf_target_arm64 |
| #define bpf_target_defined |
| #elif defined(__TARGET_ARCH_mips) |
| #define bpf_target_mips |
| #define bpf_target_defined |
| #elif defined(__TARGET_ARCH_powerpc) |
| #define bpf_target_powerpc |
| #define bpf_target_defined |
| #elif defined(__TARGET_ARCH_sparc) |
| #define bpf_target_sparc |
| #define bpf_target_defined |
| #else |
| #undef bpf_target_defined |
| #endif |
| |
| /* Fall back to what the compiler says */ |
| #ifndef bpf_target_defined |
| #if defined(__x86_64__) |
| #define bpf_target_x86 |
| #elif defined(__s390x__) |
| #define bpf_target_s930x |
| #elif defined(__aarch64__) |
| #define bpf_target_arm64 |
| #elif defined(__mips__) |
| #define bpf_target_mips |
| #elif defined(__powerpc__) |
| #define bpf_target_powerpc |
| #elif defined(__sparc__) |
| #define bpf_target_sparc |
| #endif |
| #endif |
| |
| #if defined(bpf_target_x86) |
| |
| #define PT_REGS_PARM1(x) ((x)->di) |
| #define PT_REGS_PARM2(x) ((x)->si) |
| #define PT_REGS_PARM3(x) ((x)->dx) |
| #define PT_REGS_PARM4(x) ((x)->cx) |
| #define PT_REGS_PARM5(x) ((x)->r8) |
| #define PT_REGS_RET(x) ((x)->sp) |
| #define PT_REGS_FP(x) ((x)->bp) |
| #define PT_REGS_RC(x) ((x)->ax) |
| #define PT_REGS_SP(x) ((x)->sp) |
| #define PT_REGS_IP(x) ((x)->ip) |
| |
| #elif defined(bpf_target_s390x) |
| |
| #define PT_REGS_PARM1(x) ((x)->gprs[2]) |
| #define PT_REGS_PARM2(x) ((x)->gprs[3]) |
| #define PT_REGS_PARM3(x) ((x)->gprs[4]) |
| #define PT_REGS_PARM4(x) ((x)->gprs[5]) |
| #define PT_REGS_PARM5(x) ((x)->gprs[6]) |
| #define PT_REGS_RET(x) ((x)->gprs[14]) |
| #define PT_REGS_FP(x) ((x)->gprs[11]) /* Works only with CONFIG_FRAME_POINTER */ |
| #define PT_REGS_RC(x) ((x)->gprs[2]) |
| #define PT_REGS_SP(x) ((x)->gprs[15]) |
| #define PT_REGS_IP(x) ((x)->psw.addr) |
| |
| #elif defined(bpf_target_arm64) |
| |
| #define PT_REGS_PARM1(x) ((x)->regs[0]) |
| #define PT_REGS_PARM2(x) ((x)->regs[1]) |
| #define PT_REGS_PARM3(x) ((x)->regs[2]) |
| #define PT_REGS_PARM4(x) ((x)->regs[3]) |
| #define PT_REGS_PARM5(x) ((x)->regs[4]) |
| #define PT_REGS_RET(x) ((x)->regs[30]) |
| #define PT_REGS_FP(x) ((x)->regs[29]) /* Works only with CONFIG_FRAME_POINTER */ |
| #define PT_REGS_RC(x) ((x)->regs[0]) |
| #define PT_REGS_SP(x) ((x)->sp) |
| #define PT_REGS_IP(x) ((x)->pc) |
| |
| #elif defined(bpf_target_mips) |
| |
| #define PT_REGS_PARM1(x) ((x)->regs[4]) |
| #define PT_REGS_PARM2(x) ((x)->regs[5]) |
| #define PT_REGS_PARM3(x) ((x)->regs[6]) |
| #define PT_REGS_PARM4(x) ((x)->regs[7]) |
| #define PT_REGS_PARM5(x) ((x)->regs[8]) |
| #define PT_REGS_RET(x) ((x)->regs[31]) |
| #define PT_REGS_FP(x) ((x)->regs[30]) /* Works only with CONFIG_FRAME_POINTER */ |
| #define PT_REGS_RC(x) ((x)->regs[1]) |
| #define PT_REGS_SP(x) ((x)->regs[29]) |
| #define PT_REGS_IP(x) ((x)->cp0_epc) |
| |
| #elif defined(bpf_target_powerpc) |
| |
| #define PT_REGS_PARM1(x) ((x)->gpr[3]) |
| #define PT_REGS_PARM2(x) ((x)->gpr[4]) |
| #define PT_REGS_PARM3(x) ((x)->gpr[5]) |
| #define PT_REGS_PARM4(x) ((x)->gpr[6]) |
| #define PT_REGS_PARM5(x) ((x)->gpr[7]) |
| #define PT_REGS_RC(x) ((x)->gpr[3]) |
| #define PT_REGS_SP(x) ((x)->sp) |
| #define PT_REGS_IP(x) ((x)->nip) |
| |
| #elif defined(bpf_target_sparc) |
| |
| #define PT_REGS_PARM1(x) ((x)->u_regs[UREG_I0]) |
| #define PT_REGS_PARM2(x) ((x)->u_regs[UREG_I1]) |
| #define PT_REGS_PARM3(x) ((x)->u_regs[UREG_I2]) |
| #define PT_REGS_PARM4(x) ((x)->u_regs[UREG_I3]) |
| #define PT_REGS_PARM5(x) ((x)->u_regs[UREG_I4]) |
| #define PT_REGS_RET(x) ((x)->u_regs[UREG_I7]) |
| #define PT_REGS_RC(x) ((x)->u_regs[UREG_I0]) |
| #define PT_REGS_SP(x) ((x)->u_regs[UREG_FP]) |
| |
| /* Should this also be a bpf_target check for the sparc case? */ |
| #if defined(__arch64__) |
| #define PT_REGS_IP(x) ((x)->tpc) |
| #else |
| #define PT_REGS_IP(x) ((x)->pc) |
| #endif |
| |
| #endif |
| |
| #ifdef bpf_target_powerpc |
| #define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = (ctx)->link; }) |
| #define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP |
| #elif bpf_target_sparc |
| #define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = PT_REGS_RET(ctx); }) |
| #define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP |
| #else |
| #define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ \ |
| bpf_probe_read(&(ip), sizeof(ip), (void *)PT_REGS_RET(ctx)); }) |
| #define BPF_KRETPROBE_READ_RET_IP(ip, ctx) ({ \ |
| bpf_probe_read(&(ip), sizeof(ip), \ |
| (void *)(PT_REGS_FP(ctx) + sizeof(ip))); }) |
| #endif |
| |
| #endif |
