/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_BTF_IDS_H#define _LINUX_BTF_IDS_H #include <linux/types.h> /* for u32 */ struct btf_id_set {	u32 cnt;	u32 ids[];}; struct btf_id_set8 {	u32 cnt;	u32 flags;	struct {		u32 id;		u32 flags;	} pairs[];}; #ifdef CONFIG_DEBUG_INFO_BTF #include <linux/compiler.h> /* for __PASTE */ /* * Following macros help to define lists of BTF IDs placed * in .BTF_ids section. They are initially filled with zeros * (during compilation) and resolved later during the * linking phase by resolve_btfids tool. * * Any change in list layout must be reflected in resolve_btfids * tool logic. */ #define BTF_IDS_SECTION ".BTF_ids" #define ____BTF_ID(symbol)				\asm(							\".pushsection " BTF_IDS_SECTION ",\"a\";       \n"	\".local " #symbol " ;                          \n"	\".type  " #symbol ", STT_OBJECT;               \n"	\".size  " #symbol ", 4;                        \n"	\#symbol ":                                     \n"	\".zero 4                                       \n"	\".popsection;                                  \n"); #define __BTF_ID(symbol) \	____BTF_ID(symbol) #define __ID(prefix) \	__PASTE(__PASTE(prefix, __COUNTER__), __LINE__) /* * The BTF_ID defines unique symbol for each ID pointing * to 4 zero bytes. */#define BTF_ID(prefix, name) \	__BTF_ID(__ID(__BTF_ID__##prefix##__##name##__)) /* * The BTF_ID_LIST macro defines pure (unsorted) list * of BTF IDs, with following layout: * * BTF_ID_LIST(list1) * BTF_ID(type1, name1) * BTF_ID(type2, name2) * * list1: * __BTF_ID__type1__name1__1: * .zero 4 * __BTF_ID__type2__name2__2: * .zero 4 * */#define __BTF_ID_LIST(name, scope)			\asm(							\".pushsection " BTF_IDS_SECTION ",\"a\";       \n"	\"." #scope " " #name ";                        \n"	\#name ":;                                      \n"	\".popsection;                                  \n"); #define BTF_ID_LIST(name)				\__BTF_ID_LIST(name, local)				\extern u32 name[]; #define BTF_ID_LIST_GLOBAL(name, n)			\__BTF_ID_LIST(name, globl) /* The BTF_ID_LIST_SINGLE macro defines a BTF_ID_LIST with * a single entry. */#define BTF_ID_LIST_SINGLE(name, prefix, typename)	\	BTF_ID_LIST(name) \	BTF_ID(prefix, typename)#define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) \	BTF_ID_LIST_GLOBAL(name, 1)			  \	BTF_ID(prefix, typename) /* * The BTF_ID_UNUSED macro defines 4 zero bytes. * It's used when we want to define 'unused' entry * in BTF_ID_LIST, like: * *   BTF_ID_LIST(bpf_skb_output_btf_ids) *   BTF_ID(struct, sk_buff) *   BTF_ID_UNUSED *   BTF_ID(struct, task_struct) */ #define BTF_ID_UNUSED					\asm(							\".pushsection " BTF_IDS_SECTION ",\"a\";       \n"	\".zero 4                                       \n"	\".popsection;                                  \n"); /* * The BTF_SET_START/END macros pair defines sorted list of * BTF IDs plus its members count, with following layout: * * BTF_SET_START(list) * BTF_ID(type1, name1) * BTF_ID(type2, name2) * BTF_SET_END(list) * * __BTF_ID__set__list: * .zero 4 * list: * __BTF_ID__type1__name1__3: * .zero 4 * __BTF_ID__type2__name2__4: * .zero 4 * */#define __BTF_SET_START(name, scope)			\asm(							\".pushsection " BTF_IDS_SECTION ",\"a\";       \n"	\"." #scope " __BTF_ID__set__" #name ";         \n"	\"__BTF_ID__set__" #name ":;                    \n"	\".zero 4                                       \n"	\".popsection;                                  \n"); #define BTF_SET_START(name)				\__BTF_ID_LIST(name, local)				\__BTF_SET_START(name, local) #define BTF_SET_START_GLOBAL(name)			\__BTF_ID_LIST(name, globl)				\__BTF_SET_START(name, globl) #define BTF_SET_END(name)				\asm(							\".pushsection " BTF_IDS_SECTION ",\"a\";      \n"	\".size __BTF_ID__set__" #name ", .-" #name "  \n"	\".popsection;                                 \n");	\extern struct btf_id_set name; #else #define BTF_ID_LIST(name) static u32 __maybe_unused name[5];#define BTF_ID(prefix, name)#define BTF_ID_UNUSED#define BTF_ID_LIST_GLOBAL(name, n) u32 __maybe_unused name[n];#define BTF_ID_LIST_SINGLE(name, prefix, typename) static u32 __maybe_unused name[1];#define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) u32 __maybe_unused name[1];#define BTF_SET_START(name) static struct btf_id_set __maybe_unused name = { 0 };#define BTF_SET_START_GLOBAL(name) static struct btf_id_set __maybe_unused name = { 0 };#define BTF_SET_END(name) #endif /* CONFIG_DEBUG_INFO_BTF */ #ifdef CONFIG_NET/* Define a list of socket types which can be the argument for * skc_to_*_sock() helpers. All these sockets should have * sock_common as the first argument in its memory layout. */#define BTF_SOCK_TYPE_xxx \	BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet_sock)			\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN, inet_connection_sock)	\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ, inet_request_sock)	\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, inet_timewait_sock)	\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, request_sock)			\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock)				\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMON, sock_common)		\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_sock)			\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, tcp_request_sock)		\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tcp_timewait_sock)		\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6_sock)			\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_sock)			\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6_sock)			\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_UNIX, unix_sock)			\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_MPTCP, mptcp_sock)			\	BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCKET, socket) enum {#define BTF_SOCK_TYPE(name, str) name,BTF_SOCK_TYPE_xxx#undef BTF_SOCK_TYPEMAX_BTF_SOCK_TYPE,}; extern u32 btf_sock_ids[];#endif #define BTF_TRACING_TYPE_xxx	\	BTF_TRACING_TYPE(BTF_TRACING_TYPE_TASK, task_struct)	\	BTF_TRACING_TYPE(BTF_TRACING_TYPE_FILE, file)		\	BTF_TRACING_TYPE(BTF_TRACING_TYPE_VMA, vm_area_struct) enum {#define BTF_TRACING_TYPE(name, type) name,BTF_TRACING_TYPE_xxx#undef BTF_TRACING_TYPEMAX_BTF_TRACING_TYPE,}; extern u32 btf_tracing_ids[]; #endif