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libbpf: move libbpf_errstr() into libbpf_utils.c 

Get rid of str_err.{c,h} by moving implementation of libbpf_errstr()
into libbpf_utils.c and declarations into libbpf_internal.h.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20251001171326.3883055-4-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 10:13:24 -07:00 committed by Alexei Starovoitov
parent d05ab6181b
commit c68b6fdc36
15 changed files with 84 additions and 107 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/lib/bpf/Build
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@ -1,4 +1,4 @@
libbpf-y := libbpf.o bpf.o nlattr.o btf.o libbpf_utils.o str_error.o \
libbpf-y := libbpf.o bpf.o nlattr.o btf.o libbpf_utils.o \
netlink.o bpf_prog_linfo.o libbpf_probes.o hashmap.o \
btf_dump.o ringbuf.o strset.o linker.o gen_loader.o relo_core.o \
usdt.o zip.o elf.o features.o btf_iter.o btf_relocate.o

1
tools/lib/bpf/btf.c
View File

@ -23,7 +23,6 @@
#include "libbpf_internal.h"
#include "hashmap.h"
#include "strset.h"
#include "str_error.h"
#define BTF_MAX_NR_TYPES 0x7fffffffU
#define BTF_MAX_STR_OFFSET 0x7fffffffU

1
tools/lib/bpf/btf_dump.c
View File

@ -21,7 +21,6 @@
#include "hashmap.h"
#include "libbpf.h"
#include "libbpf_internal.h"
#include "str_error.h"
static const char PREFIXES[] = "\t\t\t\t\t\t\t\t\t\t\t\t\t";
static const size_t PREFIX_CNT = sizeof(PREFIXES) - 1;

1
tools/lib/bpf/elf.c
View File

@ -9,7 +9,6 @@
#include <linux/kernel.h>
#include "libbpf_internal.h"
#include "str_error.h"
/* A SHT_GNU_versym section holds 16-bit words. This bit is set if
* the symbol is hidden and can only be seen when referenced using an

1
tools/lib/bpf/features.c
View File

@ -6,7 +6,6 @@
#include "libbpf.h"
#include "libbpf_common.h"
#include "libbpf_internal.h"
#include "str_error.h"
static inline __u64 ptr_to_u64(const void *ptr)
{

3
tools/lib/bpf/gen_loader.c
View File

@ -4,6 +4,7 @@
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <asm/byteorder.h>
#include <linux/filter.h>
#include <sys/param.h>
#include "btf.h"
@ -13,8 +14,6 @@
#include "hashmap.h"
#include "bpf_gen_internal.h"
#include "skel_internal.h"
#include <asm/byteorder.h>
#include "str_error.h"
#define MAX_USED_MAPS 64
#define MAX_USED_PROGS 32

1
tools/lib/bpf/libbpf.c
View File

@ -51,7 +51,6 @@
#include "libbpf.h"
#include "bpf.h"
#include "btf.h"
#include "str_error.h"
#include "libbpf_internal.h"
#include "hashmap.h"
#include "bpf_gen_internal.h"

10
tools/lib/bpf/libbpf_internal.h
View File

@ -172,6 +172,16 @@ do { \
#define pr_info(fmt, ...) __pr(LIBBPF_INFO, fmt, ##__VA_ARGS__)
#define pr_debug(fmt, ...) __pr(LIBBPF_DEBUG, fmt, ##__VA_ARGS__)
/**
* @brief **libbpf_errstr()** returns string corresponding to numeric errno
* @param err negative numeric errno
* @return pointer to string representation of the errno, that is invalidated
* upon the next call.
*/
const char *libbpf_errstr(int err);
#define errstr(err) libbpf_errstr(err)
#ifndef __has_builtin
#define __has_builtin(x) 0
#endif

72
tools/lib/bpf/libbpf_utils.c
View File

@ -10,10 +10,15 @@
#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
@ -73,3 +78,70 @@ int libbpf_strerror(int err, char *buf, size_t 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;
}
}

1
tools/lib/bpf/linker.c
View File

@ -25,7 +25,6 @@
#include "btf.h"
#include "libbpf_internal.h"
#include "strset.h"
#include "str_error.h"
#define BTF_EXTERN_SEC ".extern"

1
tools/lib/bpf/relo_core.c
View File

@ -64,7 +64,6 @@ enum libbpf_print_level {
#include "libbpf.h"
#include "bpf.h"
#include "btf.h"
#include "str_error.h"
#include "libbpf_internal.h"
#endif

1
tools/lib/bpf/ringbuf.c
View File

@ -21,7 +21,6 @@
#include "libbpf.h"
#include "libbpf_internal.h"
#include "bpf.h"
#include "str_error.h"
struct ring {
ring_buffer_sample_fn sample_cb;

80
tools/lib/bpf/str_error.c
View File

@ -1,80 +0,0 @@
// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
#undef _GNU_SOURCE
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include "str_error.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
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;
}
}

15
tools/lib/bpf/str_error.h
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@ -1,15 +0,0 @@
/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
#ifndef __LIBBPF_STR_ERROR_H
#define __LIBBPF_STR_ERROR_H
/**
* @brief **libbpf_errstr()** returns string corresponding to numeric errno
* @param err negative numeric errno
* @return pointer to string representation of the errno, that is invalidated
* upon the next call.
*/
const char *libbpf_errstr(int err);
#define errstr(err) libbpf_errstr(err)
#endif /* __LIBBPF_STR_ERROR_H */

1
tools/lib/bpf/usdt.c
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@ -20,7 +20,6 @@
#include "libbpf_common.h"
#include "libbpf_internal.h"
#include "hashmap.h"
#include "str_error.h"
/* libbpf's USDT support consists of BPF-side state/code and user-space
* state/code working together in concert. BPF-side parts are defined in