From mboxrd@z Thu Jan 1 00:00:00 1970 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 9F86AFA3741 for ; Mon, 31 Oct 2022 15:56:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231403AbiJaP4m (ORCPT ); Mon, 31 Oct 2022 11:56:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59812 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230244AbiJaP4i (ORCPT ); Mon, 31 Oct 2022 11:56:38 -0400 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 92448120B9; Mon, 31 Oct 2022 08:56:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1667231789; x=1698767789; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ra82adO9Ytf2Ct9J6Xvwy+xgtwmL2sMtcOWSaz42kuw=; b=IVjMaXAY8uNmj+cgWI8mG3PPgEZFsWBLSRTyFlMKNBTaKxOK64ssQ86n OtLr4bQnXZ7CbOD6d5Dw3+gGYl/ROa+0qqy9mdzER2r0G25W3BdMW8DeA XIlGapNZdWRxESmgywe1aIK5qWWmGX6r/STakBvVqsq+Oi2D7VgAT1LVH dZ57Ji6QWX84L5uI/KbDskSX64AAPrvsYurJVc3bUsaW/P0E9nIEh7PXY 3zQE0AQjfHI3OzwEvmU2SjmRqwXYMFcbUMjfPRpmCVUob1VZNUQnCZ+Xm Ry6LYLL0DFb58ffWVXRqB2tdDTBd+0s5o/S5cPcvj8ZUhmvpw4YNrikHV A==; X-IronPort-AV: E=Sophos;i="5.95,228,1661842800"; d="scan'208";a="121107677" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 31 Oct 2022 08:56:28 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Mon, 31 Oct 2022 08:56:28 -0700 Received: from den-dk-m31857.microchip.com (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.2507.12 via Frontend Transport; Mon, 31 Oct 2022 08:56:24 -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" , , , , "Daniel Machon" , Horatiu Vultur , Lars Povlsen Subject: [PATCH net-next v3 4/5] net: microchip: sparx5: Let VCAP API validate added key- and actionfields Date: Mon, 31 Oct 2022 16:56:06 +0100 Message-ID: <20221031155607.3615381-5-steen.hegelund@microchip.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221031155607.3615381-1-steen.hegelund@microchip.com> References: <20221031155607.3615381-1-steen.hegelund@microchip.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add support for validating keyfields and actionfields when they are added to a VCAP rule. We need to ensure that the field is not already present and that the field is in the key- or actionset, if the client has added a key- or actionset to the rule at this point. Signed-off-by: Steen Hegelund --- .../net/ethernet/microchip/vcap/vcap_api.c | 103 +++++++++++++++++- 1 file changed, 101 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api.c b/drivers/net/ethernet/microchip/vcap/vcap_api.c index 9e67ea814768..69ee34bb392a 100644 --- a/drivers/net/ethernet/microchip/vcap/vcap_api.c +++ b/drivers/net/ethernet/microchip/vcap/vcap_api.c @@ -737,6 +737,13 @@ const char *vcap_keyfield_name(struct vcap_control *vctrl, } EXPORT_SYMBOL_GPL(vcap_keyfield_name); +/* map action field id to a string with the action name */ +static const char *vcap_actionfield_name(struct vcap_control *vctrl, + enum vcap_action_field action) +{ + return vctrl->stats->actionfield_names[action]; +} + /* Return the keyfield that matches a key in a keyset */ static const struct vcap_field * vcap_find_keyset_keyfield(struct vcap_control *vctrl, @@ -1109,14 +1116,60 @@ static void vcap_copy_from_client_keyfield(struct vcap_rule *rule, memcpy(&field->data, data, sizeof(field->data)); } +/* Check if the keyfield is already in the rule */ +static bool vcap_keyfield_unique(struct vcap_rule *rule, + enum vcap_key_field key) +{ + struct vcap_rule_internal *ri = to_intrule(rule); + const struct vcap_client_keyfield *ckf; + + list_for_each_entry(ckf, &ri->data.keyfields, ctrl.list) + if (ckf->ctrl.key == key) + return false; + return true; +} + +/* Check if the keyfield is in the keyset */ +static bool vcap_keyfield_match_keyset(struct vcap_rule *rule, + enum vcap_key_field key) +{ + struct vcap_rule_internal *ri = to_intrule(rule); + enum vcap_keyfield_set keyset = rule->keyset; + enum vcap_type vt = ri->admin->vtype; + const struct vcap_field *fields; + + /* the field is accepted if the rule has no keyset yet */ + if (keyset == VCAP_KFS_NO_VALUE) + return true; + fields = vcap_keyfields(ri->vctrl, vt, keyset); + if (!fields) + return false; + /* if there is a width there is a way */ + return fields[key].width > 0; +} + static int vcap_rule_add_key(struct vcap_rule *rule, enum vcap_key_field key, enum vcap_field_type ftype, struct vcap_client_keyfield_data *data) { + struct vcap_rule_internal *ri = to_intrule(rule); struct vcap_client_keyfield *field; - /* More validation will be added here later */ + if (!vcap_keyfield_unique(rule, key)) { + pr_warn("%s:%d: keyfield %s is already in the rule\n", + __func__, __LINE__, + vcap_keyfield_name(ri->vctrl, key)); + return -EINVAL; + } + + if (!vcap_keyfield_match_keyset(rule, key)) { + pr_err("%s:%d: keyfield %s does not belong in the rule keyset\n", + __func__, __LINE__, + vcap_keyfield_name(ri->vctrl, key)); + return -EINVAL; + } + field = kzalloc(sizeof(*field), GFP_KERNEL); if (!field) return -ENOMEM; @@ -1209,14 +1262,60 @@ static void vcap_copy_from_client_actionfield(struct vcap_rule *rule, memcpy(&field->data, data, sizeof(field->data)); } +/* Check if the actionfield is already in the rule */ +static bool vcap_actionfield_unique(struct vcap_rule *rule, + enum vcap_action_field act) +{ + struct vcap_rule_internal *ri = to_intrule(rule); + const struct vcap_client_actionfield *caf; + + list_for_each_entry(caf, &ri->data.actionfields, ctrl.list) + if (caf->ctrl.action == act) + return false; + return true; +} + +/* Check if the actionfield is in the actionset */ +static bool vcap_actionfield_match_actionset(struct vcap_rule *rule, + enum vcap_action_field action) +{ + enum vcap_actionfield_set actionset = rule->actionset; + struct vcap_rule_internal *ri = to_intrule(rule); + enum vcap_type vt = ri->admin->vtype; + const struct vcap_field *fields; + + /* the field is accepted if the rule has no actionset yet */ + if (actionset == VCAP_AFS_NO_VALUE) + return true; + fields = vcap_actionfields(ri->vctrl, vt, actionset); + if (!fields) + return false; + /* if there is a width there is a way */ + return fields[action].width > 0; +} + static int vcap_rule_add_action(struct vcap_rule *rule, enum vcap_action_field action, enum vcap_field_type ftype, struct vcap_client_actionfield_data *data) { + struct vcap_rule_internal *ri = to_intrule(rule); struct vcap_client_actionfield *field; - /* More validation will be added here later */ + if (!vcap_actionfield_unique(rule, action)) { + pr_warn("%s:%d: actionfield %s is already in the rule\n", + __func__, __LINE__, + vcap_actionfield_name(ri->vctrl, action)); + return -EINVAL; + } + + if (!vcap_actionfield_match_actionset(rule, action)) { + pr_err("%s:%d: actionfield %s does not belong in the rule actionset\n", + __func__, __LINE__, + vcap_actionfield_name(ri->vctrl, action)); + return -EINVAL; + } + field = kzalloc(sizeof(*field), GFP_KERNEL); if (!field) return -ENOMEM; -- 2.38.1