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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-19 10:44:14 +08:00

tools lib bpf: Add libbpf_get_error()

This function will turn a libbpf pointer into a standard error code (or
0 if the pointer is valid).

This also allows removal of the dependency on linux/err.h in the public
header file, which causes problems in userspace programs built against
libbpf.

Signed-off-by: Joe Stringer <joe@ovn.org>
Acked-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: netdev@vger.kernel.org
Link: http://lkml.kernel.org/r/20170123011128.26534-5-joe@ovn.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Joe Stringer 2017-01-22 17:11:25 -08:00 committed by Arnaldo Carvalho de Melo
parent 7803ba7309
commit e28ff1a838
3 changed files with 12 additions and 2 deletions
tools
lib/bpf
perf/tests

View File

@ -28,6 +28,7 @@
#include <fcntl.h>
#include <errno.h>
#include <asm/unistd.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/bpf.h>
#include <linux/list.h>
@ -1542,3 +1543,10 @@ bpf_object__find_map_by_offset(struct bpf_object *obj, size_t offset)
}
return ERR_PTR(-ENOENT);
}
long libbpf_get_error(const void *ptr)
{
if (IS_ERR(ptr))
return PTR_ERR(ptr);
return 0;
}

View File

@ -22,8 +22,8 @@
#define __BPF_LIBBPF_H
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <linux/err.h>
#include <sys/types.h> // for size_t
enum libbpf_errno {
@ -234,4 +234,6 @@ int bpf_map__set_priv(struct bpf_map *map, void *priv,
bpf_map_clear_priv_t clear_priv);
void *bpf_map__priv(struct bpf_map *map);
long libbpf_get_error(const void *ptr);
#endif

View File

@ -13,7 +13,7 @@ static int test__bpf_parsing(void *obj_buf, size_t obj_buf_sz)
struct bpf_object *obj;
obj = bpf_object__open_buffer(obj_buf, obj_buf_sz, NULL);
if (IS_ERR(obj))
if (libbpf_get_error(obj))
return TEST_FAIL;
bpf_object__close(obj);
return TEST_OK;