mirror of
https://github.com/torvalds/linux.git
synced 2024-12-26 12:52:30 +00:00
1d1a3bcffe
It's been a recurring issue with types like u32 slipping into libbpf source
code accidentally. This is not detected during builds inside kernel source
tree, but becomes a compilation error in libbpf's Github repo. Libbpf is
supposed to use only __{s,u}{8,16,32,64} typedefs, so poison {s,u}{8,16,32,64}
explicitly in every .c file. Doing that in a bit more centralized way, e.g.,
inside libbpf_internal.h breaks selftests, which are both using kernel u32 and
libbpf_internal.h.
This patch also fixes a new u32 occurence in libbpf.c, added recently.
Fixes: 590a008882 ("bpf: libbpf: Add STRUCT_OPS support")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20200110181916.271446-1-andriin@fb.com
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
|
|
|
|
/*
|
|
* Copyright (C) 2013-2015 Alexei Starovoitov <ast@kernel.org>
|
|
* Copyright (C) 2015 Wang Nan <wangnan0@huawei.com>
|
|
* Copyright (C) 2015 Huawei Inc.
|
|
* Copyright (C) 2017 Nicira, Inc.
|
|
*/
|
|
|
|
#undef _GNU_SOURCE
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "libbpf.h"
|
|
|
|
/* make sure libbpf doesn't use kernel-only integer typedefs */
|
|
#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
|
|
|
|
#define ERRNO_OFFSET(e) ((e) - __LIBBPF_ERRNO__START)
|
|
#define ERRCODE_OFFSET(c) ERRNO_OFFSET(LIBBPF_ERRNO__##c)
|
|
#define NR_ERRNO (__LIBBPF_ERRNO__END - __LIBBPF_ERRNO__START)
|
|
|
|
static const char *libbpf_strerror_table[NR_ERRNO] = {
|
|
[ERRCODE_OFFSET(LIBELF)] = "Something wrong in libelf",
|
|
[ERRCODE_OFFSET(FORMAT)] = "BPF object format invalid",
|
|
[ERRCODE_OFFSET(KVERSION)] = "'version' section incorrect or lost",
|
|
[ERRCODE_OFFSET(ENDIAN)] = "Endian mismatch",
|
|
[ERRCODE_OFFSET(INTERNAL)] = "Internal error in libbpf",
|
|
[ERRCODE_OFFSET(RELOC)] = "Relocation failed",
|
|
[ERRCODE_OFFSET(VERIFY)] = "Kernel verifier blocks program loading",
|
|
[ERRCODE_OFFSET(PROG2BIG)] = "Program too big",
|
|
[ERRCODE_OFFSET(KVER)] = "Incorrect kernel version",
|
|
[ERRCODE_OFFSET(PROGTYPE)] = "Kernel doesn't support this program type",
|
|
[ERRCODE_OFFSET(WRNGPID)] = "Wrong pid in netlink message",
|
|
[ERRCODE_OFFSET(INVSEQ)] = "Invalid netlink sequence",
|
|
[ERRCODE_OFFSET(NLPARSE)] = "Incorrect netlink message parsing",
|
|
};
|
|
|
|
int libbpf_strerror(int err, char *buf, size_t size)
|
|
{
|
|
if (!buf || !size)
|
|
return -1;
|
|
|
|
err = err > 0 ? err : -err;
|
|
|
|
if (err < __LIBBPF_ERRNO__START) {
|
|
int ret;
|
|
|
|
ret = strerror_r(err, buf, size);
|
|
buf[size - 1] = '\0';
|
|
return ret;
|
|
}
|
|
|
|
if (err < __LIBBPF_ERRNO__END) {
|
|
const char *msg;
|
|
|
|
msg = libbpf_strerror_table[ERRNO_OFFSET(err)];
|
|
snprintf(buf, size, "%s", msg);
|
|
buf[size - 1] = '\0';
|
|
return 0;
|
|
}
|
|
|
|
snprintf(buf, size, "Unknown libbpf error %d", err);
|
|
buf[size - 1] = '\0';
|
|
return -1;
|
|
}
|