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// 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 <errno.h>
#include "libbpf.h"
#include "libbpf_internal.h"
#ifndef ENOTSUPP
#define ENOTSUPP 524
#endif
/* 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)
{
int ret;
if (!buf || !size)
return libbpf_err(-EINVAL);
err = err > 0 ? err : -err;
if (err < __LIBBPF_ERRNO__START) {
ret = strerror_r(err, buf, size);
buf[size - 1] = '\0';
return libbpf_err_errno(ret);
}
if (err < __LIBBPF_ERRNO__END) {
const char *msg;
msg = libbpf_strerror_table[ERRNO_OFFSET(err)];
ret = snprintf(buf, size, "%s", msg);
buf[size - 1] = '\0';
/* The length of the buf and msg is positive.
* A negative number may be returned only when the
* size exceeds INT_MAX. Not likely to appear.
*/
if (ret >= size)
return libbpf_err(-ERANGE);
return 0;
}
ret = snprintf(buf, size, "Unknown libbpf error %d", err);
buf[size - 1] = '\0';
if (ret >= size)
return libbpf_err(-ERANGE);
return libbpf_err(-ENOENT);
}
const char *libbpf_errstr(int err)
{
static __thread char buf[12];
if (err > 0)
err = -err;
switch (err) {
case -E2BIG: return "-E2BIG";
case -EACCES: return "-EACCES";
case -EADDRINUSE: return "-EADDRINUSE";
case -EADDRNOTAVAIL: return "-EADDRNOTAVAIL";
case -EAGAIN: return "-EAGAIN";
case -EALREADY: return "-EALREADY";
case -EBADF: return "-EBADF";
case -EBADFD: return "-EBADFD";
case -EBUSY: return "-EBUSY";
case -ECANCELED: return "-ECANCELED";
case -ECHILD: return "-ECHILD";
case -EDEADLK: return "-EDEADLK";
case -EDOM: return "-EDOM";
case -EEXIST: return "-EEXIST";
case -EFAULT: return "-EFAULT";
case -EFBIG: return "-EFBIG";
case -EILSEQ: return "-EILSEQ";
case -EINPROGRESS: return "-EINPROGRESS";
case -EINTR: return "-EINTR";
case -EINVAL: return "-EINVAL";
case -EIO: return "-EIO";
case -EISDIR: return "-EISDIR";
case -ELOOP: return "-ELOOP";
case -EMFILE: return "-EMFILE";
case -EMLINK: return "-EMLINK";
case -EMSGSIZE: return "-EMSGSIZE";
case -ENAMETOOLONG: return "-ENAMETOOLONG";
case -ENFILE: return "-ENFILE";
case -ENODATA: return "-ENODATA";
case -ENODEV: return "-ENODEV";
case -ENOENT: return "-ENOENT";
case -ENOEXEC: return "-ENOEXEC";
case -ENOLINK: return "-ENOLINK";
case -ENOMEM: return "-ENOMEM";
case -ENOSPC: return "-ENOSPC";
case -ENOTBLK: return "-ENOTBLK";
case -ENOTDIR: return "-ENOTDIR";
case -ENOTSUPP: return "-ENOTSUPP";
case -ENOTTY: return "-ENOTTY";
case -ENXIO: return "-ENXIO";
case -EOPNOTSUPP: return "-EOPNOTSUPP";
case -EOVERFLOW: return "-EOVERFLOW";
case -EPERM: return "-EPERM";
case -EPIPE: return "-EPIPE";
case -EPROTO: return "-EPROTO";
case -EPROTONOSUPPORT: return "-EPROTONOSUPPORT";
case -ERANGE: return "-ERANGE";
case -EROFS: return "-EROFS";
case -ESPIPE: return "-ESPIPE";
case -ESRCH: return "-ESRCH";
case -ETXTBSY: return "-ETXTBSY";
case -EUCLEAN: return "-EUCLEAN";
case -EXDEV: return "-EXDEV";
default:
snprintf(buf, sizeof(buf), "%d", err);
return buf;
}
}
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