diff options
| -rw-r--r-- | tools/lib/bpf/Makefile | 1 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 17 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.h | 1 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.map | 5 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf_legacy.h | 47 |
5 files changed, 71 insertions, 0 deletions
diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile index e43e1896cb4b..15420303cf06 100644 --- a/tools/lib/bpf/Makefile +++ b/tools/lib/bpf/Makefile @@ -229,6 +229,7 @@ install_headers: $(BPF_HELPER_DEFS) $(call do_install,libbpf.h,$(prefix)/include/bpf,644); \ $(call do_install,btf.h,$(prefix)/include/bpf,644); \ $(call do_install,libbpf_common.h,$(prefix)/include/bpf,644); \ + $(call do_install,libbpf_legacy.h,$(prefix)/include/bpf,644); \ $(call do_install,xsk.h,$(prefix)/include/bpf,644); \ $(call do_install,bpf_helpers.h,$(prefix)/include/bpf,644); \ $(call do_install,$(BPF_HELPER_DEFS),$(prefix)/include/bpf,644); \ diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index b396e45b17ea..1425d7ed0f2f 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -151,6 +151,23 @@ static inline __u64 ptr_to_u64(const void *ptr) return (__u64) (unsigned long) ptr; } +/* this goes away in libbpf 1.0 */ +enum libbpf_strict_mode libbpf_mode = LIBBPF_STRICT_NONE; + +int libbpf_set_strict_mode(enum libbpf_strict_mode mode) +{ + /* __LIBBPF_STRICT_LAST is the last power-of-2 value used + 1, so to + * get all possible values we compensate last +1, and then (2*x - 1) + * to get the bit mask + */ + if (mode != LIBBPF_STRICT_ALL + && (mode & ~((__LIBBPF_STRICT_LAST - 1) * 2 - 1))) + return errno = EINVAL, -EINVAL; + + libbpf_mode = mode; + return 0; +} + enum kern_feature_id { /* v4.14: kernel support for program & map names. */ FEAT_PROG_NAME, diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index d98523558f39..6e61342ba56c 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -18,6 +18,7 @@ #include <linux/bpf.h> #include "libbpf_common.h" +#include "libbpf_legacy.h" #ifdef __cplusplus extern "C" { diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 0229e01e8ccc..bbe99b1db1a9 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -370,3 +370,8 @@ LIBBPF_0.4.0 { bpf_tc_hook_destroy; bpf_tc_query; } LIBBPF_0.3.0; + +LIBBPF_0.5.0 { + global: + libbpf_set_strict_mode; +} LIBBPF_0.4.0; diff --git a/tools/lib/bpf/libbpf_legacy.h b/tools/lib/bpf/libbpf_legacy.h new file mode 100644 index 000000000000..7482cfe22ab2 --- /dev/null +++ b/tools/lib/bpf/libbpf_legacy.h @@ -0,0 +1,47 @@ +/* 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, + + __LIBBPF_STRICT_LAST, +}; + +LIBBPF_API int libbpf_set_strict_mode(enum libbpf_strict_mode mode); + + +#ifdef __cplusplus +} /* extern "C" */ +#endif + +#endif /* __LIBBPF_LEGACY_BPF_H */ |