Re: [PATCH 09/10] bpf: use new capable_any functionality

[Andrii Nakryiko]

On Fri, Mar 15, 2024 at 4:39 AM Christian Göttsche
<cgzones@xxxxxxxxxxxxxx> wrote:
>
> Use the new added capable_any function in bpf_token_capable() and
> bpf_net_capable() implementations.
>
> Signed-off-by: Christian Göttsche <cgzones@xxxxxxxxxxxxxx>
> ---
> v5:
>    add patch
> ---
>  include/linux/bpf.h  | 2 +-
>  kernel/bpf/syscall.c | 2 +-
>  kernel/bpf/token.c   | 2 +-
>  3 files changed, 3 insertions(+), 3 deletions(-)
>

It's actually a nice readability improvement, thanks!

Acked-by: Andrii Nakryiko <andrii@xxxxxxxxxx>

> diff --git a/include/linux/bpf.h b/include/linux/bpf.h
> index 4f20f62f9d63..bdadf3291bec 100644
> --- a/include/linux/bpf.h
> +++ b/include/linux/bpf.h
> @@ -2701,7 +2701,7 @@ static inline int bpf_obj_get_user(const char __user *pathname, int flags)
>
>  static inline bool bpf_token_capable(const struct bpf_token *token, int cap)
>  {
> -       return capable(cap) || (cap != CAP_SYS_ADMIN && capable(CAP_SYS_ADMIN));
> +       return capable_any(cap, CAP_SYS_ADMIN);
>  }
>
>  static inline void bpf_token_inc(struct bpf_token *token)
> diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
> index ae2ff73bde7e..a10e6f77002c 100644
> --- a/kernel/bpf/syscall.c
> +++ b/kernel/bpf/syscall.c
> @@ -1175,7 +1175,7 @@ static int map_check_btf(struct bpf_map *map, struct bpf_token *token,
>
>  static bool bpf_net_capable(void)
>  {
> -       return capable(CAP_NET_ADMIN) || capable(CAP_SYS_ADMIN);
> +       return capable_any(CAP_NET_ADMIN, CAP_SYS_ADMIN);
>  }
>
>  #define BPF_MAP_CREATE_LAST_FIELD map_token_fd
> diff --git a/kernel/bpf/token.c b/kernel/bpf/token.c
> index d6ccf8d00eab..53f491046a8d 100644
> --- a/kernel/bpf/token.c
> +++ b/kernel/bpf/token.c
> @@ -11,7 +11,7 @@
>
>  static bool bpf_ns_capable(struct user_namespace *ns, int cap)
>  {
> -       return ns_capable(ns, cap) || (cap != CAP_SYS_ADMIN && ns_capable(ns, CAP_SYS_ADMIN));
> +       return ns_capable_any(ns, cap, CAP_SYS_ADMIN);
>  }
>
>  bool bpf_token_capable(const struct bpf_token *token, int cap)
> --
> 2.43.0
>