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Commit b6989f35 authored by Joe Stringer's avatar Joe Stringer Committed by Arnaldo Carvalho de Melo
Browse files

tools lib bpf: Add bpf_map__pin() 



Add a new API to pin a BPF map to the filesystem. The user can specify
the path full path within a BPF filesystem to pin the map.

Signed-off-by: default avatarJoe Stringer <joe@ovn.org>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: netdev@vger.kernel.org
Link: http://lkml.kernel.org/r/20170126212001.14103-3-joe@ovn.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent f367540c

tools/lib/bpf/libbpf.c

+22 −0
Original line number Original line Diff line number Diff line
@@ -1357,6 +1357,28 @@ int bpf_program__pin(struct bpf_program *prog, const char *path) 
	return 0;

	return 0;

}

}





int bpf_map__pin(struct bpf_map *map, const char *path)

{

	int err;



	err = check_path(path);

	if (err)

		return err;



	if (map == NULL) {

		pr_warning("invalid map pointer\n");

		return -EINVAL;

	}



	if (bpf_obj_pin(map->fd, path)) {

		pr_warning("failed to pin map: %s\n", strerror(errno));

		return -errno;

	}



	pr_debug("pinned map '%s'\n", path);

	return 0;

}



void bpf_object__close(struct bpf_object *obj)

void bpf_object__close(struct bpf_object *obj)

{

{

	size_t i;

	size_t i;

tools/lib/bpf/libbpf.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -236,6 +236,7 @@ typedef void (*bpf_map_clear_priv_t)(struct bpf_map *, void *); 
int bpf_map__set_priv(struct bpf_map *map, void *priv,

int bpf_map__set_priv(struct bpf_map *map, void *priv,

		      bpf_map_clear_priv_t clear_priv);

		      bpf_map_clear_priv_t clear_priv);

void *bpf_map__priv(struct bpf_map *map);

void *bpf_map__priv(struct bpf_map *map);

int bpf_map__pin(struct bpf_map *map, const char *path);





long libbpf_get_error(const void *ptr);

long libbpf_get_error(const void *ptr);