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tools: libbpf: add extended attributes version of bpf_object__open() 

Similarly to bpf_prog_load() users of bpf_object__open() may need
to specify the expected program type.  Program type is needed at
open to avoid the kernel version check for program types which don't
require it.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jakub Kicinski 2018-07-10 14:43:02 -07:00 committed by Daniel Borkmann
parent f83fb22c6c
commit 07f2d4eac2
2 changed files with 26 additions and 6 deletions
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26
tools/lib/bpf/libbpf.c
View File

@ -1520,15 +1520,26 @@ __bpf_object__open(const char *path, void *obj_buf, size_t obj_buf_sz,
return ERR_PTR(err);
}
struct bpf_object *bpf_object__open(const char *path)
struct bpf_object *bpf_object__open_xattr(struct bpf_object_open_attr *attr)
{
/* param validation */
if (!path)
if (!attr->file)
return NULL;
pr_debug("loading %s\n", path);
pr_debug("loading %s\n", attr->file);
return __bpf_object__open(path, NULL, 0, true);
return __bpf_object__open(attr->file, NULL, 0,
bpf_prog_type__needs_kver(attr->prog_type));
}
struct bpf_object *bpf_object__open(const char *path)
{
struct bpf_object_open_attr attr = {
.file = path,
.prog_type = BPF_PROG_TYPE_UNSPEC,
};
return bpf_object__open_xattr(&attr);
}
struct bpf_object *bpf_object__open_buffer(void *obj_buf,
@ -2238,6 +2249,10 @@ int bpf_prog_load(const char *file, enum bpf_prog_type type,
int bpf_prog_load_xattr(const struct bpf_prog_load_attr *attr,
struct bpf_object **pobj, int *prog_fd)
{
struct bpf_object_open_attr open_attr = {
.file = attr->file,
.prog_type = attr->prog_type,
};
struct bpf_program *prog, *first_prog = NULL;
enum bpf_attach_type expected_attach_type;
enum bpf_prog_type prog_type;
@ -2250,8 +2265,7 @@ int bpf_prog_load_xattr(const struct bpf_prog_load_attr *attr,
if (!attr->file)
return -EINVAL;
obj = __bpf_object__open(attr->file, NULL, 0,
bpf_prog_type__needs_kver(attr->prog_type));
obj = bpf_object__open_xattr(&open_attr);
if (IS_ERR_OR_NULL(obj))
return -ENOENT;

6
tools/lib/bpf/libbpf.h
View File

@ -66,7 +66,13 @@ void libbpf_set_print(libbpf_print_fn_t warn,
/* Hide internal to user */
struct bpf_object;
struct bpf_object_open_attr {
const char *file;
enum bpf_prog_type prog_type;
};
struct bpf_object *bpf_object__open(const char *path);
struct bpf_object *bpf_object__open_xattr(struct bpf_object_open_attr *attr);
struct bpf_object *bpf_object__open_buffer(void *obj_buf,
size_t obj_buf_sz,
const char *name);