From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Borkmann Subject: [PATCH bpf-next 12/12] bpf: sync tools bpf.h uapi header Date: Thu, 3 May 2018 03:05:36 +0200 Message-ID: <20180503010536.7917-13-daniel@iogearbox.net> References: <20180503010536.7917-1-daniel@iogearbox.net> Cc: netdev@vger.kernel.org, Daniel Borkmann To: ast@kernel.org Return-path: Received: from www62.your-server.de ([213.133.104.62]:36268 "EHLO www62.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751889AbeECBFy (ORCPT ); Wed, 2 May 2018 21:05:54 -0400 In-Reply-To: <20180503010536.7917-1-daniel@iogearbox.net> Sender: netdev-owner@vger.kernel.org List-ID: Only sync the header from include/uapi/linux/bpf.h. Signed-off-by: Daniel Borkmann Acked-by: Alexei Starovoitov --- tools/include/uapi/linux/bpf.h | 33 ++++++++++++++++++++++++++++++++- 1 file changed, 32 insertions(+), 1 deletion(-) diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 8daef73..83a95ae 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -1801,6 +1801,30 @@ union bpf_attr { * Return * a non-negative value equal to or less than size on success, or * a negative error in case of failure. + * + * int skb_load_bytes_relative(const struct sk_buff *skb, u32 offset, void *to, u32 len, u32 start_header) + * Description + * This helper is similar to **bpf_skb_load_bytes**\ () in that + * it provides an easy way to load *len* bytes from *offset* + * from the packet associated to *skb*, into the buffer pointed + * by *to*. The difference to **bpf_skb_load_bytes**\ () is that + * a fifth argument *start_header* exists in order to select a + * base offset to start from. *start_header* can be one of: + * + * **BPF_HDR_START_MAC** + * Base offset to load data from is *skb*'s mac header. + * **BPF_HDR_START_NET** + * Base offset to load data from is *skb*'s network header. + * + * In general, "direct packet access" is the preferred method to + * access packet data, however, this helper is in particular useful + * in socket filters where *skb*\ **->data** does not always point + * to the start of the mac header and where "direct packet access" + * is not available. + * + * Return + * 0 on success, or a negative error in case of failure. + * */ #define __BPF_FUNC_MAPPER(FN) \ FN(unspec), \ @@ -1870,7 +1894,8 @@ union bpf_attr { FN(bind), \ FN(xdp_adjust_tail), \ FN(skb_get_xfrm_state), \ - FN(get_stack), + FN(get_stack), \ + FN(skb_load_bytes_relative), /* integer value in 'imm' field of BPF_CALL instruction selects which helper * function eBPF program intends to call @@ -1931,6 +1956,12 @@ enum bpf_adj_room_mode { BPF_ADJ_ROOM_NET, }; +/* Mode for BPF_FUNC_skb_load_bytes_relative helper. */ +enum bpf_hdr_start_off { + BPF_HDR_START_MAC, + BPF_HDR_START_NET, +}; + /* user accessible mirror of in-kernel sk_buff. * new fields can only be added to the end of this structure */ -- 2.9.5