Commit 24f25763 authored by Andrii Nakryiko's avatar Andrii Nakryiko Committed by Alexei Starovoitov
Browse files

libbpf: auto-generate list of BPF helper definitions 



Get rid of list of BPF helpers in bpf_helpers.h (irony...) and
auto-generate it into bpf_helpers_defs.h, which is now included from
bpf_helpers.h.

Suggested-by: default avatarAlexei Starovoitov <ast@fb.com>
Signed-off-by: default avatarAndrii Nakryiko <andriin@fb.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 7a387bed

tools/testing/selftests/bpf/.gitignore

+1 −0
Original line number Diff line number Diff line
@@ -39,3 +39,4 @@ libbpf.so.* 
test_hashmap

test_btf_dump

xdping

/bpf_helper_defs.h

tools/testing/selftests/bpf/Makefile

+6 −2
Original line number Diff line number Diff line
@@ -90,6 +90,10 @@ include ../lib.mk 
TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read

all: $(TEST_CUSTOM_PROGS)



bpf_helper_defs.h: $(APIDIR)/linux/bpf.h

	$(BPFDIR)/../../../scripts/bpf_helpers_doc.py --header 		\

		--file $(APIDIR)/linux/bpf.h > bpf_helper_defs.h



$(OUTPUT)/urandom_read: $(OUTPUT)/%: %.c

	$(CC) -o $@ $< -Wl,--build-id
@@ -123,7 +127,7 @@ $(OUTPUT)/test_cgroup_attach: cgroup_helpers.c 
# force a rebuild of BPFOBJ when its dependencies are updated

force:



$(BPFOBJ): force

$(BPFOBJ): force bpf_helper_defs.h

	$(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/



PROBE := $(shell $(LLC) -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
@@ -319,4 +323,4 @@ $(VERIFIER_TESTS_H): $(VERIFIER_TEST_FILES) | $(VERIFIER_TESTS_DIR) 


EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(ALU32_BUILD_DIR) $(BPF_GCC_BUILD_DIR) \

	$(VERIFIER_TESTS_H) $(PROG_TESTS_H) $(MAP_TESTS_H) \

	feature
 
	feature bpf_helper_defs.h

tools/testing/selftests/bpf/bpf_helpers.h

+2 −262
Original line number Diff line number Diff line
@@ -2,6 +2,8 @@ 
#ifndef __BPF_HELPERS__

#define __BPF_HELPERS__



#include "bpf_helper_defs.h"



#define __uint(name, val) int (*name)[val]

#define __type(name, val) typeof(val) *name
@@ -21,219 +23,6 @@ 
 */

#define SEC(NAME) __attribute__((section(NAME), used))



/* helper functions called from eBPF programs written in C */

static void *(*bpf_map_lookup_elem)(void *map, const void *key) =

	(void *) BPF_FUNC_map_lookup_elem;

static int (*bpf_map_update_elem)(void *map, const void *key, const void *value,

				  unsigned long long flags) =

	(void *) BPF_FUNC_map_update_elem;

static int (*bpf_map_delete_elem)(void *map, const void *key) =

	(void *) BPF_FUNC_map_delete_elem;

static int (*bpf_map_push_elem)(void *map, const void *value,

				unsigned long long flags) =

	(void *) BPF_FUNC_map_push_elem;

static int (*bpf_map_pop_elem)(void *map, void *value) =

	(void *) BPF_FUNC_map_pop_elem;

static int (*bpf_map_peek_elem)(void *map, void *value) =

	(void *) BPF_FUNC_map_peek_elem;

static int (*bpf_probe_read)(void *dst, int size, const 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, const 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_get_socket_cookie)(void *ctx) =

	(void *) BPF_FUNC_get_socket_cookie;

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_msg_push_data)(void *ctx, int start, int end, int flags) =

	(void *) BPF_FUNC_msg_push_data;

static int (*bpf_msg_pop_data)(void *ctx, int start, int cut, int flags) =

	(void *) BPF_FUNC_msg_pop_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_sk_select_reuseport)(void *ctx, void *map, void *key, __u32 flags) =

	(void *) BPF_FUNC_sk_select_reuseport;

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;

static void *(*bpf_get_local_storage)(void *map, unsigned long long flags) =

	(void *) BPF_FUNC_get_local_storage;

static unsigned long long (*bpf_skb_cgroup_id)(void *ctx) =

	(void *) BPF_FUNC_skb_cgroup_id;

static unsigned long long (*bpf_skb_ancestor_cgroup_id)(void *ctx, int level) =

	(void *) BPF_FUNC_skb_ancestor_cgroup_id;

static struct bpf_sock *(*bpf_sk_lookup_tcp)(void *ctx,

					     struct bpf_sock_tuple *tuple,

					     int size, unsigned long long netns_id,

					     unsigned long long flags) =

	(void *) BPF_FUNC_sk_lookup_tcp;

static struct bpf_sock *(*bpf_skc_lookup_tcp)(void *ctx,

					     struct bpf_sock_tuple *tuple,

					     int size, unsigned long long netns_id,

					     unsigned long long flags) =

	(void *) BPF_FUNC_skc_lookup_tcp;

static struct bpf_sock *(*bpf_sk_lookup_udp)(void *ctx,

					     struct bpf_sock_tuple *tuple,

					     int size, unsigned long long netns_id,

					     unsigned long long flags) =

	(void *) BPF_FUNC_sk_lookup_udp;

static int (*bpf_sk_release)(struct bpf_sock *sk) =

	(void *) BPF_FUNC_sk_release;

static int (*bpf_skb_vlan_push)(void *ctx, __be16 vlan_proto, __u16 vlan_tci) =

	(void *) BPF_FUNC_skb_vlan_push;

static int (*bpf_skb_vlan_pop)(void *ctx) =

	(void *) BPF_FUNC_skb_vlan_pop;

static int (*bpf_rc_pointer_rel)(void *ctx, int rel_x, int rel_y) =

	(void *) BPF_FUNC_rc_pointer_rel;

static void (*bpf_spin_lock)(struct bpf_spin_lock *lock) =

	(void *) BPF_FUNC_spin_lock;

static void (*bpf_spin_unlock)(struct bpf_spin_lock *lock) =

	(void *) BPF_FUNC_spin_unlock;

static struct bpf_sock *(*bpf_sk_fullsock)(struct bpf_sock *sk) =

	(void *) BPF_FUNC_sk_fullsock;

static struct bpf_tcp_sock *(*bpf_tcp_sock)(struct bpf_sock *sk) =

	(void *) BPF_FUNC_tcp_sock;

static struct bpf_sock *(*bpf_get_listener_sock)(struct bpf_sock *sk) =

	(void *) BPF_FUNC_get_listener_sock;

static int (*bpf_skb_ecn_set_ce)(void *ctx) =

	(void *) BPF_FUNC_skb_ecn_set_ce;

static int (*bpf_tcp_check_syncookie)(struct bpf_sock *sk,

	    void *ip, int ip_len, void *tcp, int tcp_len) =

	(void *) BPF_FUNC_tcp_check_syncookie;

static int (*bpf_sysctl_get_name)(void *ctx, char *buf,

				  unsigned long long buf_len,

				  unsigned long long flags) =

	(void *) BPF_FUNC_sysctl_get_name;

static int (*bpf_sysctl_get_current_value)(void *ctx, char *buf,

					   unsigned long long buf_len) =

	(void *) BPF_FUNC_sysctl_get_current_value;

static int (*bpf_sysctl_get_new_value)(void *ctx, char *buf,

				       unsigned long long buf_len) =

	(void *) BPF_FUNC_sysctl_get_new_value;

static int (*bpf_sysctl_set_new_value)(void *ctx, const char *buf,

				       unsigned long long buf_len) =

	(void *) BPF_FUNC_sysctl_set_new_value;

static int (*bpf_strtol)(const char *buf, unsigned long long buf_len,

			 unsigned long long flags, long *res) =

	(void *) BPF_FUNC_strtol;

static int (*bpf_strtoul)(const char *buf, unsigned long long buf_len,

			  unsigned long long flags, unsigned long *res) =

	(void *) BPF_FUNC_strtoul;

static void *(*bpf_sk_storage_get)(void *map, struct bpf_sock *sk,

				   void *value, __u64 flags) =

	(void *) BPF_FUNC_sk_storage_get;

static int (*bpf_sk_storage_delete)(void *map, struct bpf_sock *sk) =

	(void *)BPF_FUNC_sk_storage_delete;

static int (*bpf_send_signal)(unsigned sig) = (void *)BPF_FUNC_send_signal;

static long long (*bpf_tcp_gen_syncookie)(struct bpf_sock *sk, void *ip,

					  int ip_len, void *tcp, int tcp_len) =

	(void *) BPF_FUNC_tcp_gen_syncookie;



/* llvm builtin functions that eBPF C program may use to

 * emit BPF_LD_ABS and BPF_LD_IND instructions

 */
@@ -273,55 +62,6 @@ struct bpf_map_def { 
	__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_load_bytes_relative)(void *ctx, int off, void *to, int len, __u32 start_header) =

	(void *) BPF_FUNC_skb_load_bytes_relative;

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;

static unsigned int (*bpf_get_cgroup_classid)(void *ctx) =

	(void *) BPF_FUNC_get_cgroup_classid;

static unsigned int (*bpf_get_route_realm)(void *ctx) =

	(void *) BPF_FUNC_get_route_realm;

static int (*bpf_skb_change_proto)(void *ctx, __be16 proto, __u64 flags) =

	(void *) BPF_FUNC_skb_change_proto;

static int (*bpf_skb_change_type)(void *ctx, __u32 type) =

	(void *) BPF_FUNC_skb_change_type;

static unsigned int (*bpf_get_hash_recalc)(void *ctx) =

	(void *) BPF_FUNC_get_hash_recalc;

static unsigned long long (*bpf_get_current_task)(void) =

	(void *) BPF_FUNC_get_current_task;

static int (*bpf_skb_change_tail)(void *ctx, __u32 len, __u64 flags) =

	(void *) BPF_FUNC_skb_change_tail;

static long long (*bpf_csum_update)(void *ctx, __u32 csum) =

	(void *) BPF_FUNC_csum_update;

static void (*bpf_set_hash_invalid)(void *ctx) =

	(void *) BPF_FUNC_set_hash_invalid;

static int (*bpf_get_numa_node_id)(void) =

	(void *) BPF_FUNC_get_numa_node_id;

static int (*bpf_probe_read_str)(void *ctx, __u32 size,

				 const void *unsafe_ptr) =

	(void *) BPF_FUNC_probe_read_str;

static unsigned int (*bpf_get_socket_uid)(void *ctx) =

	(void *) BPF_FUNC_get_socket_uid;

static unsigned int (*bpf_set_hash)(void *ctx, __u32 hash) =

	(void *) BPF_FUNC_set_hash;

static int (*bpf_skb_adjust_room)(void *ctx, __s32 len_diff, __u32 mode,

				  unsigned long long flags) =

	(void *) BPF_FUNC_skb_adjust_room;



/* Scan the ARCH passed in from ARCH env variable (see Makefile) */

#if defined(__TARGET_ARCH_x86)

	#define bpf_target_x86

CRA Git | Maintained and supported by SUSTech CRA and CCSE