From patchwork Fri Oct 30 11:16:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Abeni X-Patchwork-Id: 11869239 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 53E8C92C for ; Fri, 30 Oct 2020 11:16:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 298E620756 for ; Fri, 30 Oct 2020 11:16:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Ra6B7ygg" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726317AbgJ3LQd (ORCPT ); Fri, 30 Oct 2020 07:16:33 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:48860 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726226AbgJ3LQb (ORCPT ); Fri, 30 Oct 2020 07:16:31 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1604056589; 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=WnT8yDT00QyRsUEZ7gp5zTCd68WeeplEqh2AFWI8M0Q=; b=Ra6B7yggExj0OqVP6QeJjBzgLO8EYuzv5LwGrpjm6JuHFmnEW1W8aWk0Ij31hYzRa+dKc8 jtYcFzTlTD9rIOstUN23+Rekz2yR6W9acB7V5OXUJIYDhr+iGPjacQHRLdhpP+cNOlT9+c 9rPTGc3IxmVBfLahMsVtodFMYjbctC4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-262-mXSXqv9EPbi8R7k9h-V3SA-1; Fri, 30 Oct 2020 07:16:27 -0400 X-MC-Unique: mXSXqv9EPbi8R7k9h-V3SA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 43CFD1006700; Fri, 30 Oct 2020 11:16:26 +0000 (UTC) Received: from gerbillo.redhat.com (ovpn-114-14.ams2.redhat.com [10.36.114.14]) by smtp.corp.redhat.com (Postfix) with ESMTP id 345D010027AA; Fri, 30 Oct 2020 11:16:24 +0000 (UTC) From: Paolo Abeni To: netdev@vger.kernel.org Cc: Jonathan Corbet , "David S. Miller" , Jakub Kicinski , Shuah Khan , linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Marcelo Tosatti Subject: [PATCH net-next v2 1/3] net/sysctl: factor-out netdev_rx_queue_set_rps_mask() helper Date: Fri, 30 Oct 2020 12:16:01 +0100 Message-Id: <02f88c3f7fb2dedb96b764328360c36d92bad95c.1604055792.git.pabeni@redhat.com> In-Reply-To: References: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Will simplify the following patch. No functional change intended. Signed-off-by: Paolo Abeni --- net/core/net-sysfs.c | 66 ++++++++++++++++++++++++-------------------- 1 file changed, 36 insertions(+), 30 deletions(-) diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 94fff0700bdd..b57426707216 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -737,42 +737,18 @@ static ssize_t show_rps_map(struct netdev_rx_queue *queue, char *buf) return len < PAGE_SIZE ? len : -EINVAL; } -static ssize_t store_rps_map(struct netdev_rx_queue *queue, - const char *buf, size_t len) +static int netdev_rx_queue_set_rps_mask(struct netdev_rx_queue *queue, + cpumask_var_t mask) { - struct rps_map *old_map, *map; - cpumask_var_t mask; - int err, cpu, i, hk_flags; static DEFINE_MUTEX(rps_map_mutex); - - if (!capable(CAP_NET_ADMIN)) - return -EPERM; - - if (!alloc_cpumask_var(&mask, GFP_KERNEL)) - return -ENOMEM; - - err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); - if (err) { - free_cpumask_var(mask); - return err; - } - - if (!cpumask_empty(mask)) { - hk_flags = HK_FLAG_DOMAIN | HK_FLAG_WQ; - cpumask_and(mask, mask, housekeeping_cpumask(hk_flags)); - if (cpumask_empty(mask)) { - free_cpumask_var(mask); - return -EINVAL; - } - } + struct rps_map *old_map, *map; + int cpu, i; map = kzalloc(max_t(unsigned int, RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), GFP_KERNEL); - if (!map) { - free_cpumask_var(mask); + if (!map) return -ENOMEM; - } i = 0; for_each_cpu_and(cpu, mask, cpu_online_mask) @@ -799,9 +775,39 @@ static ssize_t store_rps_map(struct netdev_rx_queue *queue, if (old_map) kfree_rcu(old_map, rcu); + return 0; +} + +static ssize_t store_rps_map(struct netdev_rx_queue *queue, + const char *buf, size_t len) +{ + cpumask_var_t mask; + int err, hk_flags; + + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + + if (!alloc_cpumask_var(&mask, GFP_KERNEL)) + return -ENOMEM; + + err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); + if (err) + goto out; + if (!cpumask_empty(mask)) { + hk_flags = HK_FLAG_DOMAIN | HK_FLAG_WQ; + cpumask_and(mask, mask, housekeeping_cpumask(hk_flags)); + if (cpumask_empty(mask)) { + err = -EINVAL; + goto out; + } + } + + err = netdev_rx_queue_set_rps_mask(queue, mask); + +out: free_cpumask_var(mask); - return len; + return err ? : len; } static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,