76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
|
// SPDX-License-Identifier: LGPL-2.1
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU Lesser General Public
|
||
|
|
* License as published by the Free Software Foundation;
|
||
|
|
* version 2.1 of the License (not later!)
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
|
* License along with this program; if not, see <http://www.gnu.org/licenses>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#undef _GNU_SOURCE
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#include "libbpf.h"
|
||
|
|
|
||
|
|
#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",
|
||
|
|
};
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|