From patchwork Tue Oct 20 00:58:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Petr Machata X-Patchwork-Id: 11845531 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 90095C43457 for ; Tue, 20 Oct 2020 00:59:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 52BB422456 for ; Tue, 20 Oct 2020 00:59:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=pmachata.org header.i=@pmachata.org header.b="QMUqD8lB" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389669AbgJTA67 (ORCPT ); Mon, 19 Oct 2020 20:58:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55832 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389646AbgJTA66 (ORCPT ); Mon, 19 Oct 2020 20:58:58 -0400 Received: from mout-p-202.mailbox.org (mout-p-202.mailbox.org [IPv6:2001:67c:2050::465:202]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB08CC0613CE for ; Mon, 19 Oct 2020 17:58:57 -0700 (PDT) Received: from smtp1.mailbox.org (smtp1.mailbox.org [IPv6:2001:67c:2050:105:465:1:1:0]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-p-202.mailbox.org (Postfix) with ESMTPS id 4CFZy76DykzQkjT; Tue, 20 Oct 2020 02:58:55 +0200 (CEST) X-Virus-Scanned: amavisd-new at heinlein-support.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=pmachata.org; s=MBO0001; t=1603155533; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Z7CSWxwYJEwqPVE0qm7XiHWb0y7DmeBB1lZaj2VjhFg=; b=QMUqD8lBMDVo0jhxhXwv5iUM6a2gUZRbvIWqJu8cnp3La/nw6/fMmBa3pO/ck4exSQ4FwF cIqCykIgqessuCUJkoFlMXa3ZhTTjFAuRlDwWmvs2Jvkr801a8a038IwcMXJwvm/PQX0OV loA2zGoFOUzT+WfEStv0Ys8CB7hL8wstbUSVU8Aof0//+pbTD1QMkDcp4xev1gqY/qb2Wa E3we3cZgb6S3901ArbJNRIm7p6Z/GSxAVqs4MA+zk/0veQJ16cZfgDcAtSITvXYuuGGytu O0BzmTP5KipV0fGY37CLsmZYHSrRbhyaetH5KgNNZZEsAMns3hIVhXZz+wRuFA== Received: from smtp1.mailbox.org ([80.241.60.240]) by gerste.heinlein-support.de (gerste.heinlein-support.de [91.198.250.173]) (amavisd-new, port 10030) with ESMTP id ygROeAtvvhir; Tue, 20 Oct 2020 02:58:52 +0200 (CEST) From: Petr Machata To: netdev@vger.kernel.org, dsahern@gmail.com, stephen@networkplumber.org Cc: john.fastabend@gmail.com, jiri@nvidia.com, idosch@nvidia.com, Petr Machata Subject: [PATCH iproute2-next 09/15] lib: Extract from devlink/mnlg a helper, mnlu_msg_prepare() Date: Tue, 20 Oct 2020 02:58:17 +0200 Message-Id: <2eb2e1b39a08fdff0b602dac55343a1e8769b133.1603154867.git.me@pmachata.org> In-Reply-To: References: MIME-Version: 1.0 X-MBO-SPAM-Probability: ** X-Rspamd-Score: 1.52 / 15.00 / 15.00 X-Rspamd-Queue-Id: 9D33015 X-Rspamd-UID: 83be8b Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Allocation of a new netlink message with the two usual headers is reusable with other netlink netlink message types. Extract it into a helper, mnlu_msg_prepare(). Take the second header as an argument, instead of passing in parameters to initialize it, and copy it in. Signed-off-by: Petr Machata --- devlink/mnlg.c | 18 ++++++------------ include/mnl_utils.h | 2 ++ lib/mnl_utils.c | 19 +++++++++++++++++++ 3 files changed, 27 insertions(+), 12 deletions(-) diff --git a/devlink/mnlg.c b/devlink/mnlg.c index 9817bbad5e7d..4995b7af06a3 100644 --- a/devlink/mnlg.c +++ b/devlink/mnlg.c @@ -14,7 +14,6 @@ #include #include #include -#include #include #include @@ -36,19 +35,14 @@ static struct nlmsghdr *__mnlg_msg_prepare(struct mnlg_socket *nlg, uint8_t cmd, uint16_t flags, uint32_t id, uint8_t version) { + struct genlmsghdr genl = { + .cmd = cmd, + .version = version, + }; struct nlmsghdr *nlh; - struct genlmsghdr *genl; - - nlh = mnl_nlmsg_put_header(nlg->buf); - nlh->nlmsg_type = id; - nlh->nlmsg_flags = flags; - nlg->seq = time(NULL); - nlh->nlmsg_seq = nlg->seq; - - genl = mnl_nlmsg_put_extra_header(nlh, sizeof(struct genlmsghdr)); - genl->cmd = cmd; - genl->version = version; + nlh = mnlu_msg_prepare(nlg->buf, id, flags, &genl, sizeof(genl)); + nlg->seq = nlh->nlmsg_seq; return nlh; } diff --git a/include/mnl_utils.h b/include/mnl_utils.h index 10a064afdfe8..86ce30f49a94 100644 --- a/include/mnl_utils.h +++ b/include/mnl_utils.h @@ -3,5 +3,7 @@ #define __MNL_UTILS_H__ 1 struct mnl_socket *mnlu_socket_open(int bus); +struct nlmsghdr *mnlu_msg_prepare(void *buf, uint32_t nlmsg_type, uint16_t flags, + void *extra_header, size_t extra_header_size); #endif /* __MNL_UTILS_H__ */ diff --git a/lib/mnl_utils.c b/lib/mnl_utils.c index eecb11341651..87df1e81faf5 100644 --- a/lib/mnl_utils.c +++ b/lib/mnl_utils.c @@ -8,6 +8,8 @@ * */ +#include +#include #include #include "mnl_utils.h" @@ -33,3 +35,20 @@ err_bind: mnl_socket_close(nl); return NULL; } + +struct nlmsghdr *mnlu_msg_prepare(void *buf, uint32_t nlmsg_type, uint16_t flags, + void *extra_header, size_t extra_header_size) +{ + struct nlmsghdr *nlh; + void *eh; + + nlh = mnl_nlmsg_put_header(buf); + nlh->nlmsg_type = nlmsg_type; + nlh->nlmsg_flags = flags; + nlh->nlmsg_seq = time(NULL); + + eh = mnl_nlmsg_put_extra_header(nlh, extra_header_size); + memcpy(eh, extra_header, extra_header_size); + + return nlh; +}