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perf/urgent fixes: 

- Fix the build on !_GNU_SOURCE libc systems such as Alpine Linux/musl
   libc due to usage of strerror_r glibc variant on libbpf (Arnaldo Carvalho de Melo)
 
 - Fix out-of-tree asciidoctor man page generation (Ben Hutchings)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo-4.19-20180918' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

 - Fix the build on !_GNU_SOURCE libc systems such as Alpine Linux/musl
   libc due to usage of strerror_r glibc variant on libbpf (Arnaldo Carvalho de Melo)

 - Fix out-of-tree asciidoctor man page generation (Ben Hutchings)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2018-09-19 13:25:35 +02:00
parent f21f7fa263 169e366c08
commit 5d05dfd13f
5 changed files with 36 additions and 12 deletions
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2
tools/lib/bpf/Build
View File

@ -1 +1 @@
libbpf-y := libbpf.o bpf.o nlattr.o btf.o libbpf_errno.o
libbpf-y := libbpf.o bpf.o nlattr.o btf.o libbpf_errno.o str_error.o

20
tools/lib/bpf/libbpf.c
View File

@ -50,6 +50,7 @@
#include "libbpf.h"
#include "bpf.h"
#include "btf.h"
#include "str_error.h"
#ifndef EM_BPF
#define EM_BPF 247
@ -469,7 +470,7 @@ static int bpf_object__elf_init(struct bpf_object *obj)
obj->efile.fd = open(obj->path, O_RDONLY);
if (obj->efile.fd < 0) {
char errmsg[STRERR_BUFSIZE];
char *cp = strerror_r(errno, errmsg, sizeof(errmsg));
char *cp = str_error(errno, errmsg, sizeof(errmsg));
pr_warning("failed to open %s: %s\n", obj->path, cp);
return -errno;
@ -810,8 +811,7 @@ static int bpf_object__elf_collect(struct bpf_object *obj)
data->d_size, name, idx);
if (err) {
char errmsg[STRERR_BUFSIZE];
char *cp = strerror_r(-err, errmsg,
sizeof(errmsg));
char *cp = str_error(-err, errmsg, sizeof(errmsg));
pr_warning("failed to alloc program %s (%s): %s",
name, obj->path, cp);
@ -1140,7 +1140,7 @@ bpf_object__create_maps(struct bpf_object *obj)
*pfd = bpf_create_map_xattr(&create_attr);
if (*pfd < 0 && create_attr.btf_key_type_id) {
cp = strerror_r(errno, errmsg, sizeof(errmsg));
cp = str_error(errno, errmsg, sizeof(errmsg));
pr_warning("Error in bpf_create_map_xattr(%s):%s(%d). Retrying without BTF.\n",
map->name, cp, errno);
create_attr.btf_fd = 0;
@ -1155,7 +1155,7 @@ bpf_object__create_maps(struct bpf_object *obj)
size_t j;
err = *pfd;
cp = strerror_r(errno, errmsg, sizeof(errmsg));
cp = str_error(errno, errmsg, sizeof(errmsg));
pr_warning("failed to create map (name: '%s'): %s\n",
map->name, cp);
for (j = 0; j < i; j++)
@ -1339,7 +1339,7 @@ load_program(enum bpf_prog_type type, enum bpf_attach_type expected_attach_type,
}
ret = -LIBBPF_ERRNO__LOAD;
cp = strerror_r(errno, errmsg, sizeof(errmsg));
cp = str_error(errno, errmsg, sizeof(errmsg));
pr_warning("load bpf program failed: %s\n", cp);
if (log_buf && log_buf[0] != '\0') {
@ -1654,7 +1654,7 @@ static int check_path(const char *path)
dir = dirname(dname);
if (statfs(dir, &st_fs)) {
cp = strerror_r(errno, errmsg, sizeof(errmsg));
cp = str_error(errno, errmsg, sizeof(errmsg));
pr_warning("failed to statfs %s: %s\n", dir, cp);
err = -errno;
}
@ -1690,7 +1690,7 @@ int bpf_program__pin_instance(struct bpf_program *prog, const char *path,
}
if (bpf_obj_pin(prog->instances.fds[instance], path)) {
cp = strerror_r(errno, errmsg, sizeof(errmsg));
cp = str_error(errno, errmsg, sizeof(errmsg));
pr_warning("failed to pin program: %s\n", cp);
return -errno;
}
@ -1708,7 +1708,7 @@ static int make_dir(const char *path)
err = -errno;
if (err) {
cp = strerror_r(-err, errmsg, sizeof(errmsg));
cp = str_error(-err, errmsg, sizeof(errmsg));
pr_warning("failed to mkdir %s: %s\n", path, cp);
}
return err;
@ -1770,7 +1770,7 @@ int bpf_map__pin(struct bpf_map *map, const char *path)
}
if (bpf_obj_pin(map->fd, path)) {
cp = strerror_r(errno, errmsg, sizeof(errmsg));
cp = str_error(errno, errmsg, sizeof(errmsg));
pr_warning("failed to pin map: %s\n", cp);
return -errno;
}

18
tools/lib/bpf/str_error.c Normal file
View File

@ -0,0 +1,18 @@
// SPDX-License-Identifier: LGPL-2.1
#undef _GNU_SOURCE
#include <string.h>
#include <stdio.h>
#include "str_error.h"
/*
* 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 *str_error(int err, char *dst, int len)
{
int ret = strerror_r(err, dst, len);
if (ret)
snprintf(dst, len, "ERROR: strerror_r(%d)=%d", err, ret);
return dst;
}

6
tools/lib/bpf/str_error.h Normal file
View File

@ -0,0 +1,6 @@
// SPDX-License-Identifier: LGPL-2.1
#ifndef BPF_STR_ERROR
#define BPF_STR_ERROR
char *str_error(int err, char *dst, int len);
#endif // BPF_STR_ERROR

2
tools/perf/Documentation/Makefile
View File

@ -280,7 +280,7 @@ $(MAN_HTML): $(OUTPUT)%.html : %.txt
mv $@+ $@
ifdef USE_ASCIIDOCTOR
$(OUTPUT)%.1 $(OUTPUT)%.5 $(OUTPUT)%.7 : $(OUTPUT)%.txt
$(OUTPUT)%.1 $(OUTPUT)%.5 $(OUTPUT)%.7 : %.txt
$(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
$(ASCIIDOC) -b manpage -d manpage \
$(ASCIIDOC_EXTRA) -aperf_version=$(PERF_VERSION) -o $@+ $< && \