From patchwork Sun Jul 9 16:13:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Victor Nogueira X-Patchwork-Id: 13305900 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CFB61E570 for ; Sun, 9 Jul 2023 16:14:07 +0000 (UTC) Received: from mail-oi1-x234.google.com (mail-oi1-x234.google.com [IPv6:2607:f8b0:4864:20::234]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 82A12FD for ; Sun, 9 Jul 2023 09:14:06 -0700 (PDT) Received: by mail-oi1-x234.google.com with SMTP id 5614622812f47-3a3b7f992e7so2556900b6e.2 for ; Sun, 09 Jul 2023 09:14:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mojatatu-com.20221208.gappssmtp.com; s=20221208; t=1688919245; x=1691511245; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ROiy2swWI51OFRxPVukylUmtOl8kXv5G8fgZkxcUvKE=; b=SgCimg1EJVK1ByVg+YYBaSd315KEcVjY6PHWi7lJoA2GDAfSt0S2pEkP1v4yWBS6NO 92eN3kpUX2qiVxUfneXVSQNztFkHQNk2GEZYOhfVmJvT247zJtRthqoC4J5z6WsFS6yB wFU9b8pTHCYsYFfWs0YWTP7i8+DqaZFE+nJQ4AeoeBurmAt33XSPo1cGA/kr3m0URNem vEB+rHkRiNR5u4DjzgRZCqk+NmOB5WubHbS1CWxgTZhQs5+j18m4SvpjXjVzCKE7uoNl aY5P5Bt28EDuriM1MGIIty1K7LdLJlid5bxdbluKEPtUdYiAl92N7ihluMTnl1PfDJ/o jplA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1688919245; x=1691511245; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ROiy2swWI51OFRxPVukylUmtOl8kXv5G8fgZkxcUvKE=; b=F0+uaC/gTEXydgiwzz+1QWoyuTISGmRdNQ4a/yaBOvkPJdxDzfxj1dSkDVor8W0YE/ 1t/Hhif5GMCPD0+ryHennljEU/7xV66tuPB/gqqsEHLCYJTYlz08AznrKcgiyJNDzgtf LNaTw7RhtZx9zv0GCK4+hZS32TaBY/Onn0CEynFeywedTGS69GfgPJeu1spv8VZ+ZUZ8 walMgssN54d5aLznQl70v+tu3fJDUl9uSlMV4WvvBo2+6Rk2vqUegNmraER3n8m2BM46 oSBf9NUHyCaQKAqLeuvoF08Pretbr4PuYyh7hqoCc8z4F5p9kFHdRW3Ahnv55OwgI4eQ 6WYg== X-Gm-Message-State: ABy/qLZbq+SLVFc2OoXN9UsfUgKiUuynfrz34v/GXiakOfow8C17TcsD rMj31u4N/imrSE451amSdHOnN40gF0m2S2c2AJA= X-Google-Smtp-Source: APBJJlF1XoOS226218jedMxSdhWRLjPfFo84Oz+S8Fk+zrEia26JhrX0ip2ruMHITg2jSG9Adq53/g== X-Received: by 2002:aca:110d:0:b0:3a3:7c33:9a0d with SMTP id 13-20020aca110d000000b003a37c339a0dmr8017366oir.48.1688919245747; Sun, 09 Jul 2023 09:14:05 -0700 (PDT) Received: from localhost.localdomain ([2804:7f1:e2c1:1622:34af:d3bb:8e9a:95c5]) by smtp.gmail.com with ESMTPSA id w14-20020a056808140e00b003a1efec1a6esm3391617oiv.46.2023.07.09.09.14.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 09 Jul 2023 09:14:05 -0700 (PDT) From: Victor Nogueira To: netdev@vger.kernel.org Cc: jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, pctammela@mojatatu.com, simon.horman@corigine.com, kernel@mojatatu.com Subject: [PATCH net v3 2/2] net: sched: cls_flower: Undo tcf_bind_filter if fl_set_key fails Date: Sun, 9 Jul 2023 13:13:50 -0300 Message-Id: <20230709161350.347064-3-victor@mojatatu.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230709161350.347064-1-victor@mojatatu.com> References: <20230709161350.347064-1-victor@mojatatu.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org If TCA_FLOWER_CLASSID is specified in the netlink message, the code will call tcf_bind_filter. However, if any error occurs after that, the code should undo this by calling tcf_unbind_filter. Fixes: 77b9900ef53a ("tc: introduce Flower classifier") Signed-off-by: Victor Nogueira Acked-by: Jamal Hadi Salim Reviewed-by: Pedro Tammela --- net/sched/cls_flower.c | 99 ++++++++++++++++++++---------------------- 1 file changed, 47 insertions(+), 52 deletions(-) diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c index 56065cc5a661..9a40010ccb9f 100644 --- a/net/sched/cls_flower.c +++ b/net/sched/cls_flower.c @@ -2163,53 +2163,6 @@ static bool fl_needs_tc_skb_ext(const struct fl_flow_key *mask) return mask->meta.l2_miss; } -static int fl_set_parms(struct net *net, struct tcf_proto *tp, - struct cls_fl_filter *f, struct fl_flow_mask *mask, - unsigned long base, struct nlattr **tb, - struct nlattr *est, - struct fl_flow_tmplt *tmplt, - u32 flags, u32 fl_flags, - struct netlink_ext_ack *extack) -{ - int err; - - err = tcf_exts_validate_ex(net, tp, tb, est, &f->exts, flags, - fl_flags, extack); - if (err < 0) - return err; - - if (tb[TCA_FLOWER_CLASSID]) { - f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); - if (flags & TCA_ACT_FLAGS_NO_RTNL) - rtnl_lock(); - tcf_bind_filter(tp, &f->res, base); - if (flags & TCA_ACT_FLAGS_NO_RTNL) - rtnl_unlock(); - } - - err = fl_set_key(net, tb, &f->key, &mask->key, extack); - if (err) - return err; - - fl_mask_update_range(mask); - fl_set_masked_key(&f->mkey, &f->key, mask); - - if (!fl_mask_fits_tmplt(tmplt, mask)) { - NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); - return -EINVAL; - } - - /* Enable tc skb extension if filter matches on data extracted from - * this extension. - */ - if (fl_needs_tc_skb_ext(&mask->key)) { - f->needs_tc_skb_ext = 1; - tc_skb_ext_tc_enable(); - } - - return 0; -} - static int fl_ht_insert_unique(struct cls_fl_filter *fnew, struct cls_fl_filter *fold, bool *in_ht) @@ -2241,6 +2194,7 @@ static int fl_change(struct net *net, struct sk_buff *in_skb, struct cls_fl_head *head = fl_head_dereference(tp); bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL); struct cls_fl_filter *fold = *arg; + bool bound_to_filter = false; struct cls_fl_filter *fnew; struct fl_flow_mask *mask; struct nlattr **tb; @@ -2325,15 +2279,46 @@ static int fl_change(struct net *net, struct sk_buff *in_skb, if (err < 0) goto errout_idr; - err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], - tp->chain->tmplt_priv, flags, fnew->flags, - extack); - if (err) + err = tcf_exts_validate_ex(net, tp, tb, tca[TCA_RATE], + &fnew->exts, flags, fnew->flags, + extack); + if (err < 0) goto errout_idr; + if (tb[TCA_FLOWER_CLASSID]) { + fnew->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); + if (flags & TCA_ACT_FLAGS_NO_RTNL) + rtnl_lock(); + tcf_bind_filter(tp, &fnew->res, base); + if (flags & TCA_ACT_FLAGS_NO_RTNL) + rtnl_unlock(); + bound_to_filter = true; + } + + err = fl_set_key(net, tb, &fnew->key, &mask->key, extack); + if (err) + goto unbind_filter; + + fl_mask_update_range(mask); + fl_set_masked_key(&fnew->mkey, &fnew->key, mask); + + if (!fl_mask_fits_tmplt(tp->chain->tmplt_priv, mask)) { + NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); + err = -EINVAL; + goto unbind_filter; + } + + /* Enable tc skb extension if filter matches on data extracted from + * this extension. + */ + if (fl_needs_tc_skb_ext(&mask->key)) { + fnew->needs_tc_skb_ext = 1; + tc_skb_ext_tc_enable(); + } + err = fl_check_assign_mask(head, fnew, fold, mask); if (err) - goto errout_idr; + goto unbind_filter; err = fl_ht_insert_unique(fnew, fold, &in_ht); if (err) @@ -2424,6 +2409,16 @@ static int fl_change(struct net *net, struct sk_buff *in_skb, fnew->mask->filter_ht_params); errout_mask: fl_mask_put(head, fnew->mask); + +unbind_filter: + if (bound_to_filter) { + if (flags & TCA_ACT_FLAGS_NO_RTNL) + rtnl_lock(); + tcf_unbind_filter(tp, &fnew->res); + if (flags & TCA_ACT_FLAGS_NO_RTNL) + rtnl_unlock(); + } + errout_idr: if (!fold) idr_remove(&head->handle_idr, fnew->handle);