linux-kernel - Re: [PATCH net-next v1 4/7] tools: Sync {,tools/}include/uapi/linux/bpf.h

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Date:   Mon, 6 Feb 2017 20:51:38 +0100
From:   Mickaël Salaün <mic@...ikod.net>
To:     linux-kernel@...r.kernel.org
Cc:     netdev@...r.kernel.org, Alexei Starovoitov <ast@...com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        "David S . Miller" <davem@...emloft.net>
Subject: Re: [PATCH net-next v1 4/7] tools: Sync
 {,tools/}include/uapi/linux/bpf.h

This patch only make sense in net-next, however.

On 06/02/2017 00:14, Mickaël Salaün wrote:
> The tools version of this header is out of date; update it to the latest
> version from kernel header.
> 
> Signed-off-by: Mickaël Salaün <mic@...ikod.net>
> Cc: Alexei Starovoitov <ast@...com>
> Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
> Cc: Daniel Borkmann <daniel@...earbox.net>
> Cc: David S. Miller <davem@...emloft.net>
> ---
>  tools/include/uapi/linux/bpf.h | 23 ++++++++++++++++++++++-
>  1 file changed, 22 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
> index 0eb0e87dbe9f..e07fd5a324e6 100644
> --- a/tools/include/uapi/linux/bpf.h
> +++ b/tools/include/uapi/linux/bpf.h
> @@ -63,6 +63,12 @@ struct bpf_insn {
>  	__s32	imm;		/* signed immediate constant */
>  };
>  
> +/* Key of an a BPF_MAP_TYPE_LPM_TRIE entry */
> +struct bpf_lpm_trie_key {
> +	__u32	prefixlen;	/* up to 32 for AF_INET, 128 for AF_INET6 */
> +	__u8	data[0];	/* Arbitrary size */
> +};
> +
>  /* BPF syscall commands, see bpf(2) man-page for details. */
>  enum bpf_cmd {
>  	BPF_MAP_CREATE,
> @@ -89,6 +95,7 @@ enum bpf_map_type {
>  	BPF_MAP_TYPE_CGROUP_ARRAY,
>  	BPF_MAP_TYPE_LRU_HASH,
>  	BPF_MAP_TYPE_LRU_PERCPU_HASH,
> +	BPF_MAP_TYPE_LPM_TRIE,
>  };
>  
>  enum bpf_prog_type {
> @@ -430,6 +437,18 @@ union bpf_attr {
>   *     @xdp_md: pointer to xdp_md
>   *     @delta: An positive/negative integer to be added to xdp_md.data
>   *     Return: 0 on success or negative on error
> + *
> + * int bpf_probe_read_str(void *dst, int size, const void *unsafe_ptr)
> + *     Copy a NUL terminated string from unsafe address. In case the string
> + *     length is smaller than size, the target is not padded with further NUL
> + *     bytes. In case the string length is larger than size, just count-1
> + *     bytes are copied and the last byte is set to NUL.
> + *     @dst: destination address
> + *     @size: maximum number of bytes to copy, including the trailing NUL
> + *     @unsafe_ptr: unsafe address
> + *     Return:
> + *       > 0 length of the string including the trailing NUL on success
> + *       < 0 error
>   */
>  #define __BPF_FUNC_MAPPER(FN)		\
>  	FN(unspec),			\
> @@ -476,7 +495,8 @@ union bpf_attr {
>  	FN(set_hash_invalid),		\
>  	FN(get_numa_node_id),		\
>  	FN(skb_change_head),		\
> -	FN(xdp_adjust_head),
> +	FN(xdp_adjust_head),		\
> +	FN(probe_read_str),
>  
>  /* integer value in 'imm' field of BPF_CALL instruction selects which helper
>   * function eBPF program intends to call
> @@ -502,6 +522,7 @@ enum bpf_func_id {
>  /* BPF_FUNC_l4_csum_replace flags. */
>  #define BPF_F_PSEUDO_HDR		(1ULL << 4)
>  #define BPF_F_MARK_MANGLED_0		(1ULL << 5)
> +#define BPF_F_MARK_ENFORCE		(1ULL << 6)
>  
>  /* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */
>  #define BPF_F_INGRESS			(1ULL << 0)
> 



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