mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 05:50:53 +07:00
fce557bcef
tcp and udp bpf_iter can reuse some socket ids in btf_sock_ids, so make it global. I put the extern definition in btf_ids.h as a central place so it can be easily discovered by developers. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200720163402.1393427-1-yhs@fb.com
131 lines
3.5 KiB
C
131 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
#ifndef _LINUX_BTF_IDS_H
|
|
#define _LINUX_BTF_IDS_H
|
|
|
|
#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(prefix, __COUNTER__)
|
|
|
|
/*
|
|
* 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) \
|
|
__BTF_ID_LIST(name, globl)
|
|
|
|
/*
|
|
* 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");
|
|
|
|
#else
|
|
|
|
#define BTF_ID_LIST(name) static u32 name[5];
|
|
#define BTF_ID(prefix, name)
|
|
#define BTF_ID_UNUSED
|
|
#define BTF_ID_LIST_GLOBAL(name) u32 name[1];
|
|
|
|
#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)
|
|
|
|
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
|
|
|
|
#endif
|