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libbpf: remove unused libbpf_strerror_r and STRERR_BUFSIZE 

libbpf_strerror_r() is not exposed as public API and neither is it used
inside libbpf itself. Remove it altogether.

Same for STRERR_BUFSIZE, it's just an orphaned leftover constant which
we missed to clean up some time earlier.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20251001171326.3883055-3-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
This commit is contained in:
Andrii Nakryiko 2025-10-01 10:13:23 -07:00 committed by Alexei Starovoitov
parent 44d42bd808
commit d05ab6181b
3 changed files with 0 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/lib/bpf/libbpf.c
View File

@ -319,8 +319,6 @@ static void pr_perm_msg(int err)
buf);
}
#define STRERR_BUFSIZE 128
/* Copied from tools/perf/util/util.h */
#ifndef zfree
# define zfree(ptr) ({ free(*ptr); *ptr = NULL; })

24
tools/lib/bpf/str_error.c
View File

@ -12,30 +12,6 @@
/* make sure libbpf doesn't use kernel-only integer typedefs */
#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
/*
* Wrapper to allow for building in non-GNU systems such as Alpine Linux's musl
* libc, while checking strerror_r() return to avoid having to check this in
* all places calling it.
*/
char *libbpf_strerror_r(int err, char *dst, int len)
{
int ret = strerror_r(err < 0 ? -err : err, dst, len);
/* on glibc <2.13, ret == -1 and errno is set, if strerror_r() can't
* handle the error, on glibc >=2.13 *positive* (errno-like) error
* code is returned directly
*/
if (ret == -1)
ret = errno;
if (ret) {
if (ret == EINVAL)
/* strerror_r() doesn't recognize this specific error */
snprintf(dst, len, "unknown error (%d)", err < 0 ? err : -err);
else
snprintf(dst, len, "ERROR: strerror_r(%d)=%d", err, ret);
}
return dst;
}
const char *libbpf_errstr(int err)
{
static __thread char buf[12];

4
tools/lib/bpf/str_error.h
View File

@ -2,10 +2,6 @@
#ifndef __LIBBPF_STR_ERROR_H
#define __LIBBPF_STR_ERROR_H
#define STRERR_BUFSIZE 128
char *libbpf_strerror_r(int err, char *dst, int len);
/**
* @brief **libbpf_errstr()** returns string corresponding to numeric errno
* @param err negative numeric errno