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 0E545C25B6B for ; Wed, 25 Oct 2023 21:26:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230397AbjJYV0O (ORCPT ); Wed, 25 Oct 2023 17:26:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49450 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230400AbjJYV0K (ORCPT ); Wed, 25 Oct 2023 17:26:10 -0400 Received: from mail.netfilter.org (mail.netfilter.org [217.70.188.207]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 125DE137; Wed, 25 Oct 2023 14:26:09 -0700 (PDT) From: Pablo Neira Ayuso To: netfilter-devel@vger.kernel.org Cc: davem@davemloft.net, netdev@vger.kernel.org, kuba@kernel.org, pabeni@redhat.com, edumazet@google.com, fw@strlen.de Subject: [PATCH net-next 12/19] netfilter: nf_tables: nft_obj_filter fits into cb->ctx Date: Wed, 25 Oct 2023 23:25:48 +0200 Message-Id: <20231025212555.132775-13-pablo@netfilter.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20231025212555.132775-1-pablo@netfilter.org> References: <20231025212555.132775-1-pablo@netfilter.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org From: Phil Sutter No need to allocate it if one may just use struct netlink_callback's scratch area for it. Signed-off-by: Phil Sutter Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_tables_api.c | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 3585ddd99ef8..c84e2cc6d3b3 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -7690,7 +7690,7 @@ struct nft_obj_dump_ctx { static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb) { const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); - struct nft_obj_dump_ctx *ctx = cb->data; + struct nft_obj_dump_ctx *ctx = (void *)cb->ctx; struct net *net = sock_net(skb->sk); int family = nfmsg->nfgen_family; struct nftables_pernet *nft_net; @@ -7752,34 +7752,28 @@ static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb) static int nf_tables_dump_obj_start(struct netlink_callback *cb) { + struct nft_obj_dump_ctx *ctx = (void *)cb->ctx; const struct nlattr * const *nla = cb->data; - struct nft_obj_dump_ctx *ctx = NULL; - ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC); - if (!ctx) - return -ENOMEM; + BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); if (nla[NFTA_OBJ_TABLE]) { ctx->table = nla_strdup(nla[NFTA_OBJ_TABLE], GFP_ATOMIC); - if (!ctx->table) { - kfree(ctx); + if (!ctx->table) return -ENOMEM; - } } if (nla[NFTA_OBJ_TYPE]) ctx->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE])); - cb->data = ctx; return 0; } static int nf_tables_dump_obj_done(struct netlink_callback *cb) { - struct nft_obj_dump_ctx *ctx = cb->data; + struct nft_obj_dump_ctx *ctx = (void *)cb->ctx; kfree(ctx->table); - kfree(ctx); return 0; } -- 2.30.2