[PATCH v2 bpf-next 08/18] libbpf: add BPF token support to bpf_map_create() API

Andrii Nakryiko
2023-06-07T23:54:26Z

Add ability to provide token_fd for BPF_MAP_CREATE command through
bpf_map_create() API.

Also wire through token_create.allowed_map_types param for
BPF_TOKEN_CREATE command.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
---
tools/lib/bpf/bpf.c | 5 ++++-
tools/lib/bpf/bpf.h | 7 +++++--
2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 38be66719485..0318538d43eb 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -169,7 +169,7 @@ int bpf_map_create(enum bpf_map_type map_type,
__u32 max_entries,
const struct bpf_map_create_opts *opts)
{
- const size_t attr_sz = offsetofend(union bpf_attr, map_extra);
+ const size_t attr_sz = offsetofend(union bpf_attr, map_token_fd);
union bpf_attr attr;
int fd;

@@ -198,6 +198,8 @@ int bpf_map_create(enum bpf_map_type map_type,
attr.numa_node = OPTS_GET(opts, numa_node, 0);
attr.map_ifindex = OPTS_GET(opts, map_ifindex, 0);

+ attr.map_token_fd = OPTS_GET(opts, token_fd, 0);
+
fd = sys_bpf_fd(BPF_MAP_CREATE, &attr, attr_sz);
return libbpf_err_errno(fd);
}
@@ -1215,6 +1217,7 @@ int bpf_token_create(struct bpf_token_create_opts *opts)
attr.token_create.flags = OPTS_GET(opts, flags, 0);
attr.token_create.token_fd = OPTS_GET(opts, token_fd, 0);
attr.token_create.allowed_cmds = OPTS_GET(opts, allowed_cmds, 0);
+ attr.token_create.allowed_map_types = OPTS_GET(opts, allowed_map_types, 0);

ret = sys_bpf_fd(BPF_TOKEN_CREATE, &attr, attr_sz);
return libbpf_err_errno(ret);
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index f2b8041ca27a..19a43201d1af 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -51,8 +51,10 @@ struct bpf_map_create_opts {

__u32 numa_node;
__u32 map_ifindex;
+
+ __u32 token_fd;
};
-#define bpf_map_create_opts__last_field map_ifindex
+#define bpf_map_create_opts__last_field token_fd

LIBBPF_API int bpf_map_create(enum bpf_map_type map_type,
const char *map_name,
@@ -556,9 +558,10 @@ struct bpf_token_create_opts {
__u32 flags;
__u32 token_fd;
__u64 allowed_cmds;
+ __u64 allowed_map_types;
size_t :0;
};
-#define bpf_token_create_opts__last_field allowed_cmds
+#define bpf_token_create_opts__last_field allowed_map_types

LIBBPF_API int bpf_token_create(struct bpf_token_create_opts *opts);

--
2.34.1