/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_BTF_IDS_H #define _LINUX_BTF_IDS_H struct btf_id_set { u32 cnt; u32 ids[]; }; /* This flag implies BTF_SET8 holds kfunc(s) */ #define BTF_SET8_KFUNCS (1 << 0) struct btf_id_set8 { u32 cnt; u32 flags; struct { u32 id; u32 flags; } pairs[]; }; #ifdef CONFIG_DEBUG_INFO_BTF #include /* for __PASTE */ #include /* for __maybe_unused */ #include /* * 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, word) \ asm( \ ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ ".local " #symbol " ; \n" \ ".type " #symbol ", STT_OBJECT; \n" \ ".size " #symbol ", 4; \n" \ #symbol ": \n" \ ".zero 4 \n" \ word \ ".popsection; \n"); #define __BTF_ID(symbol, word) \ ____BTF_ID(symbol, word) #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##__), "") #define ____BTF_ID_FLAGS(prefix, name, flags) \ __BTF_ID(__ID(__BTF_ID__##prefix##__##name##__), ".long " #flags "\n") #define __BTF_ID_FLAGS(prefix, name, flags, ...) \ ____BTF_ID_FLAGS(prefix, name, flags) #define BTF_ID_FLAGS(prefix, name, ...) \ __BTF_ID_FLAGS(prefix, name, ##__VA_ARGS__, 0) /* * 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; /* * The BTF_SET8_START/END macros pair defines sorted list of * BTF IDs and their flags plus its members count, with the * following layout: * * BTF_SET8_START(list) * BTF_ID_FLAGS(type1, name1, flags) * BTF_ID_FLAGS(type2, name2, flags) * BTF_SET8_END(list) * * __BTF_ID__set8__list: * .zero 8 * list: * __BTF_ID__type1__name1__3: * .zero 4 * .word (1 << 0) | (1 << 2) * __BTF_ID__type2__name2__5: * .zero 4 * .word (1 << 3) | (1 << 1) | (1 << 2) * */ #define __BTF_SET8_START(name, scope, flags) \ __BTF_ID_LIST(name, local) \ asm( \ ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ "." #scope " __BTF_ID__set8__" #name "; \n" \ "__BTF_ID__set8__" #name ":; \n" \ ".zero 4 \n" \ ".long " __stringify(flags) "\n" \ ".popsection; \n"); #define BTF_SET8_START(name) \ __BTF_SET8_START(name, local, 0) #define BTF_SET8_END(name) \ asm( \ ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ ".size __BTF_ID__set8__" #name ", .-" #name " \n" \ ".popsection; \n"); \ extern struct btf_id_set8 name; #define BTF_KFUNCS_START(name) \ __BTF_SET8_START(name, local, BTF_SET8_KFUNCS) #define BTF_KFUNCS_END(name) \ BTF_SET8_END(name) #else #define BTF_ID_LIST(name) static u32 __maybe_unused name[64]; #define BTF_ID(prefix, name) #define BTF_ID_FLAGS(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) #define BTF_SET8_START(name) static struct btf_id_set8 __maybe_unused name = { 0 }; #define BTF_SET8_END(name) #define BTF_KFUNCS_START(name) static struct btf_id_set8 __maybe_unused name = { .flags = BTF_SET8_KFUNCS }; #define BTF_KFUNCS_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_TYPE MAX_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_TYPE MAX_BTF_TRACING_TYPE, }; extern u32 btf_tracing_ids[]; extern u32 bpf_cgroup_btf_id[]; extern u32 bpf_local_storage_map_btf_id[]; extern u32 btf_bpf_map_id[]; #endif