mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-16 07:24:39 +08:00
bc380eb9d0
Currently, libbpf considers a single routine in .text to be a program. This is particularly confusing when it comes to library objects - a single routine meant to be used as an extern will instead be considered a bpf_program. This patch hides this compatibility behavior behind the pre-existing SEC_NAME strict mode flag. Signed-off-by: Delyan Kratunov <delyank@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/018de8d0d67c04bf436055270d35d394ba393505.1647473511.git.delyank@fb.com
115 lines
3.8 KiB
C
115 lines
3.8 KiB
C
/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
|
|
|
|
/*
|
|
* Libbpf legacy APIs (either discouraged or deprecated, as mentioned in [0])
|
|
*
|
|
* [0] https://docs.google.com/document/d/1UyjTZuPFWiPFyKk1tV5an11_iaRuec6U-ZESZ54nNTY
|
|
*
|
|
* Copyright (C) 2021 Facebook
|
|
*/
|
|
#ifndef __LIBBPF_LEGACY_BPF_H
|
|
#define __LIBBPF_LEGACY_BPF_H
|
|
|
|
#include <linux/bpf.h>
|
|
#include <stdbool.h>
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include "libbpf_common.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
enum libbpf_strict_mode {
|
|
/* Turn on all supported strict features of libbpf to simulate libbpf
|
|
* v1.0 behavior.
|
|
* This will be the default behavior in libbpf v1.0.
|
|
*/
|
|
LIBBPF_STRICT_ALL = 0xffffffff,
|
|
|
|
/*
|
|
* Disable any libbpf 1.0 behaviors. This is the default before libbpf
|
|
* v1.0. It won't be supported anymore in v1.0, please update your
|
|
* code so that it handles LIBBPF_STRICT_ALL mode before libbpf v1.0.
|
|
*/
|
|
LIBBPF_STRICT_NONE = 0x00,
|
|
/*
|
|
* Return NULL pointers on error, not ERR_PTR(err).
|
|
* Additionally, libbpf also always sets errno to corresponding Exx
|
|
* (positive) error code.
|
|
*/
|
|
LIBBPF_STRICT_CLEAN_PTRS = 0x01,
|
|
/*
|
|
* Return actual error codes from low-level APIs directly, not just -1.
|
|
* Additionally, libbpf also always sets errno to corresponding Exx
|
|
* (positive) error code.
|
|
*/
|
|
LIBBPF_STRICT_DIRECT_ERRS = 0x02,
|
|
/*
|
|
* Enforce strict BPF program section (SEC()) names.
|
|
* E.g., while prefiously SEC("xdp_whatever") or SEC("perf_event_blah") were
|
|
* allowed, with LIBBPF_STRICT_SEC_PREFIX this will become
|
|
* unrecognized by libbpf and would have to be just SEC("xdp") and
|
|
* SEC("xdp") and SEC("perf_event").
|
|
*
|
|
* Note, in this mode the program pin path will be based on the
|
|
* function name instead of section name.
|
|
*
|
|
* Additionally, routines in the .text section are always considered
|
|
* sub-programs. Legacy behavior allows for a single routine in .text
|
|
* to be a program.
|
|
*/
|
|
LIBBPF_STRICT_SEC_NAME = 0x04,
|
|
/*
|
|
* Disable the global 'bpf_objects_list'. Maintaining this list adds
|
|
* a race condition to bpf_object__open() and bpf_object__close().
|
|
* Clients can maintain it on their own if it is valuable for them.
|
|
*/
|
|
LIBBPF_STRICT_NO_OBJECT_LIST = 0x08,
|
|
/*
|
|
* Automatically bump RLIMIT_MEMLOCK using setrlimit() before the
|
|
* first BPF program or map creation operation. This is done only if
|
|
* kernel is too old to support memcg-based memory accounting for BPF
|
|
* subsystem. By default, RLIMIT_MEMLOCK limit is set to RLIM_INFINITY,
|
|
* but it can be overriden with libbpf_set_memlock_rlim_max() API.
|
|
* Note that libbpf_set_memlock_rlim_max() needs to be called before
|
|
* the very first bpf_prog_load(), bpf_map_create() or bpf_object__load()
|
|
* operation.
|
|
*/
|
|
LIBBPF_STRICT_AUTO_RLIMIT_MEMLOCK = 0x10,
|
|
/*
|
|
* Error out on any SEC("maps") map definition, which are deprecated
|
|
* in favor of BTF-defined map definitions in SEC(".maps").
|
|
*/
|
|
LIBBPF_STRICT_MAP_DEFINITIONS = 0x20,
|
|
|
|
__LIBBPF_STRICT_LAST,
|
|
};
|
|
|
|
LIBBPF_API int libbpf_set_strict_mode(enum libbpf_strict_mode mode);
|
|
|
|
#define DECLARE_LIBBPF_OPTS LIBBPF_OPTS
|
|
|
|
/* "Discouraged" APIs which don't follow consistent libbpf naming patterns.
|
|
* They are normally a trivial aliases or wrappers for proper APIs and are
|
|
* left to minimize unnecessary disruption for users of libbpf. But they
|
|
* shouldn't be used going forward.
|
|
*/
|
|
|
|
struct bpf_program;
|
|
struct bpf_map;
|
|
struct btf;
|
|
struct btf_ext;
|
|
|
|
LIBBPF_API enum bpf_prog_type bpf_program__get_type(const struct bpf_program *prog);
|
|
LIBBPF_API enum bpf_attach_type bpf_program__get_expected_attach_type(const struct bpf_program *prog);
|
|
LIBBPF_API const char *bpf_map__get_pin_path(const struct bpf_map *map);
|
|
LIBBPF_API const void *btf__get_raw_data(const struct btf *btf, __u32 *size);
|
|
LIBBPF_API const void *btf_ext__get_raw_data(const struct btf_ext *btf_ext, __u32 *size);
|
|
|
|
#ifdef __cplusplus
|
|
} /* extern "C" */
|
|
#endif
|
|
|
|
#endif /* __LIBBPF_LEGACY_BPF_H */
|