From patchwork Wed Nov 16 08:57:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steen Hegelund X-Patchwork-Id: 13044554 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 49450C4332F for ; Wed, 16 Nov 2022 09:00:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233403AbiKPJA4 (ORCPT ); Wed, 16 Nov 2022 04:00:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54348 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238742AbiKPI7H (ORCPT ); Wed, 16 Nov 2022 03:59:07 -0500 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E19241DF3E; Wed, 16 Nov 2022 00:58:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1668589104; x=1700125104; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ECkmPcPVfC1Fd1lbFAa6NaTrAzf5Mg9N0wBNbfFFNO8=; b=U0SevKPJ06ygtHh+rSZL6Mzi0/XrhUwTkhcc6dKFj2718ERS+EPAIA8n /EWr1Dzdee1OJDuB+RVLAd2PX/3/juaFcZnWgpa/7eXCa1znXAl/VaYaJ ujsz6FCuZIpp8Ox6Cc5GkJJOysW0CkeMnTJCVTv+w43cxS39c0BhPksXC +YpncoawA1fP43leYzURA1H3CZ6vvKY9DUJseg74bpuylXQXpU62i81Ra g9SRvDvWtpGMqdgUGgQmzgGpc+G7B35j59TNPLGXrOhUcSE9zM6XpIi6i z2rvvC6fSp47GDHT5EoN1i5CThe2tbDrmzbFLamj1sZvgeiNU1X22S2nT w==; X-IronPort-AV: E=Sophos;i="5.96,167,1665471600"; d="scan'208";a="187219751" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa2.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 16 Nov 2022 01:58:21 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Wed, 16 Nov 2022 01:58:20 -0700 Received: from den-dk-m31857.microchip.com (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.2507.12 via Frontend Transport; Wed, 16 Nov 2022 01:58:17 -0700 From: Steen Hegelund To: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni CC: Steen Hegelund , , Randy Dunlap , "Casper Andersson" , Russell King , Wan Jiabing , "Nathan Huckleberry" , , , , "Steen Hegelund" , Daniel Machon , Horatiu Vultur , Lars Povlsen Subject: [PATCH net-next 7/8] net: microchip: sparx5: Add VCAP locking to protect rules Date: Wed, 16 Nov 2022 09:57:46 +0100 Message-ID: <20221116085747.3810427-8-steen.hegelund@microchip.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221116085747.3810427-1-steen.hegelund@microchip.com> References: <20221116085747.3810427-1-steen.hegelund@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org This ensures that the VCAP cache and the lists maintained in the VCAP instance is protected when accessed by different clients. Signed-off-by: Steen Hegelund --- .../net/ethernet/microchip/sparx5/sparx5_vcap_impl.c | 2 ++ drivers/net/ethernet/microchip/vcap/vcap_api.c | 10 ++++++++++ drivers/net/ethernet/microchip/vcap/vcap_api.h | 1 + drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c | 2 ++ 4 files changed, 15 insertions(+) diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_vcap_impl.c b/drivers/net/ethernet/microchip/sparx5/sparx5_vcap_impl.c index e70ff1aa6d57..0c4d4e6d51e6 100644 --- a/drivers/net/ethernet/microchip/sparx5/sparx5_vcap_impl.c +++ b/drivers/net/ethernet/microchip/sparx5/sparx5_vcap_impl.c @@ -579,6 +579,7 @@ static void sparx5_vcap_admin_free(struct vcap_admin *admin) { if (!admin) return; + mutex_destroy(&admin->lock); kfree(admin->cache.keystream); kfree(admin->cache.maskstream); kfree(admin->cache.actionstream); @@ -598,6 +599,7 @@ sparx5_vcap_admin_alloc(struct sparx5 *sparx5, struct vcap_control *ctrl, INIT_LIST_HEAD(&admin->list); INIT_LIST_HEAD(&admin->rules); INIT_LIST_HEAD(&admin->enabled); + mutex_init(&admin->lock); admin->vtype = cfg->vtype; admin->vinst = cfg->vinst; admin->lookups = cfg->lookups; diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api.c b/drivers/net/ethernet/microchip/vcap/vcap_api.c index 3415605350c9..ac7a32ff755e 100644 --- a/drivers/net/ethernet/microchip/vcap/vcap_api.c +++ b/drivers/net/ethernet/microchip/vcap/vcap_api.c @@ -1054,6 +1054,7 @@ int vcap_add_rule(struct vcap_rule *rule) if (ret) return ret; /* Insert the new rule in the list of vcap rules */ + mutex_lock(&ri->admin->lock); ret = vcap_insert_rule(ri, &move); if (ret < 0) { pr_err("%s:%d: could not insert rule in vcap list: %d\n", @@ -1072,6 +1073,7 @@ int vcap_add_rule(struct vcap_rule *rule) if (ret) pr_err("%s:%d: rule write error: %d\n", __func__, __LINE__, ret); out: + mutex_unlock(&ri->admin->lock); return ret; } EXPORT_SYMBOL_GPL(vcap_add_rule); @@ -1221,9 +1223,11 @@ int vcap_del_rule(struct vcap_control *vctrl, struct net_device *ndev, u32 id) gap = vcap_fill_rule_gap(ri); /* Delete the rule from the list of rules and the cache */ + mutex_lock(&admin->lock); list_del(&ri->list); vctrl->ops->init(ndev, admin, admin->last_used_addr, ri->size + gap); kfree(ri); + mutex_unlock(&admin->lock); /* Update the last used address, set to default when no rules */ if (list_empty(&admin->rules)) { @@ -1246,6 +1250,8 @@ int vcap_del_rules(struct vcap_control *vctrl, struct vcap_admin *admin) if (ret) return ret; + + mutex_lock(&admin->lock); list_for_each_entry_safe(ri, next_ri, &admin->rules, list) { vctrl->ops->init(ri->ndev, admin, ri->addr, ri->size); list_del(&ri->list); @@ -1258,6 +1264,7 @@ int vcap_del_rules(struct vcap_control *vctrl, struct vcap_admin *admin) list_del(&eport->list); kfree(eport); } + mutex_unlock(&admin->lock); return 0; } @@ -1687,10 +1694,13 @@ int vcap_enable_lookups(struct vcap_control *vctrl, struct net_device *ndev, if (chain_id) { if (vcap_is_enabled(admin, ndev, cookie)) return -EADDRINUSE; + mutex_lock(&admin->lock); vcap_enable(admin, ndev, cookie); } else { + mutex_lock(&admin->lock); vcap_disable(admin, ndev, cookie); } + mutex_unlock(&admin->lock); return 0; } diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api.h b/drivers/net/ethernet/microchip/vcap/vcap_api.h index e71e7d3d79c2..f4a5ba5ffa87 100644 --- a/drivers/net/ethernet/microchip/vcap/vcap_api.h +++ b/drivers/net/ethernet/microchip/vcap/vcap_api.h @@ -167,6 +167,7 @@ struct vcap_admin { struct list_head list; /* for insertion in vcap_control */ struct list_head rules; /* list of rules */ struct list_head enabled; /* list of enabled ports */ + struct mutex lock; /* control access to rules */ enum vcap_type vtype; /* type of vcap */ int vinst; /* instance number within the same type */ int first_cid; /* first chain id in this vcap */ diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c b/drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c index 8e5b1cc24d80..534c51f2ec4f 100644 --- a/drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c +++ b/drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c @@ -618,6 +618,7 @@ static int vcap_show_admin(struct vcap_control *vctrl, int ret = 0; vcap_show_admin_info(vctrl, admin, out); + mutex_lock(&admin->lock); list_for_each_entry(elem, &admin->rules, list) { ri = vcap_dup_rule(elem); if (IS_ERR(ri)) @@ -631,6 +632,7 @@ static int vcap_show_admin(struct vcap_control *vctrl, free_rule: vcap_free_rule((struct vcap_rule *)ri); } + mutex_unlock(&admin->lock); return ret; }