From patchwork Mon Jun 28 05:45:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steffen Klassert X-Patchwork-Id: 468648 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6CEDC2B9F4 for ; Mon, 28 Jun 2021 05:55:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9E12F619AD for ; Mon, 28 Jun 2021 05:55:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232244AbhF1F5e (ORCPT ); Mon, 28 Jun 2021 01:57:34 -0400 Received: from mailout1.secunet.com ([62.96.220.44]:40994 "EHLO mailout1.secunet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232215AbhF1F5Z (ORCPT ); Mon, 28 Jun 2021 01:57:25 -0400 Received: from cas-essen-01.secunet.de (unknown [10.53.40.201]) by mailout1.secunet.com (Postfix) with ESMTP id B8894800058; Mon, 28 Jun 2021 07:54:58 +0200 (CEST) Received: from mbx-essen-01.secunet.de (10.53.40.197) by cas-essen-01.secunet.de (10.53.40.201) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Mon, 28 Jun 2021 07:54:58 +0200 Received: from gauss2.secunet.de (10.182.7.193) by mbx-essen-01.secunet.de (10.53.40.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Mon, 28 Jun 2021 07:54:58 +0200 Received: by gauss2.secunet.de (Postfix, from userid 1000) id ADBAC31805DC; Mon, 28 Jun 2021 07:45:28 +0200 (CEST) From: Steffen Klassert To: David Miller , Jakub Kicinski CC: Herbert Xu , Steffen Klassert , Subject: [PATCH 15/17] xfrm: replay: remove recheck indirection Date: Mon, 28 Jun 2021 07:45:20 +0200 Message-ID: <20210628054522.1718786-16-steffen.klassert@secunet.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210628054522.1718786-1-steffen.klassert@secunet.com> References: <20210628054522.1718786-1-steffen.klassert@secunet.com> MIME-Version: 1.0 X-ClientProxiedBy: cas-essen-01.secunet.de (10.53.40.201) To mbx-essen-01.secunet.de (10.53.40.197) X-EXCLAIMER-MD-CONFIG: 2c86f778-e09b-4440-8b15-867914633a10 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Florian Westphal Adds new xfrm_replay_recheck() helper and calls it from xfrm input path instead of the indirection. Signed-off-by: Florian Westphal Signed-off-by: Steffen Klassert --- include/net/xfrm.h | 4 +--- net/xfrm/xfrm_input.c | 2 +- net/xfrm/xfrm_replay.c | 22 ++++++++++++++++------ 3 files changed, 18 insertions(+), 10 deletions(-) diff --git a/include/net/xfrm.h b/include/net/xfrm.h index a7f997b13198..3a219b34cb8c 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -309,9 +309,6 @@ struct xfrm_replay { int (*check)(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq); - int (*recheck)(struct xfrm_state *x, - struct sk_buff *skb, - __be32 net_seq); int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); }; @@ -1723,6 +1720,7 @@ static inline int xfrm_policy_id2dir(u32 index) #ifdef CONFIG_XFRM void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq); void xfrm_replay_notify(struct xfrm_state *x, int event); +int xfrm_replay_recheck(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq); static inline int xfrm_aevent_is_on(struct net *net) { diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c index c8971e4b33ab..8046ef1a6680 100644 --- a/net/xfrm/xfrm_input.c +++ b/net/xfrm/xfrm_input.c @@ -660,7 +660,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) /* only the first xfrm gets the encap type */ encap_type = 0; - if (x->repl->recheck(x, skb, seq)) { + if (xfrm_replay_recheck(x, skb, seq)) { XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATESEQERROR); goto drop_unlock; } diff --git a/net/xfrm/xfrm_replay.c b/net/xfrm/xfrm_replay.c index 9565b0f7d380..59391dc80fa3 100644 --- a/net/xfrm/xfrm_replay.c +++ b/net/xfrm/xfrm_replay.c @@ -519,6 +519,22 @@ static int xfrm_replay_recheck_esn(struct xfrm_state *x, return xfrm_replay_check_esn(x, skb, net_seq); } +int xfrm_replay_recheck(struct xfrm_state *x, + struct sk_buff *skb, __be32 net_seq) +{ + switch (x->repl_mode) { + case XFRM_REPLAY_MODE_LEGACY: + break; + case XFRM_REPLAY_MODE_BMP: + /* no special recheck treatment */ + return xfrm_replay_check_bmp(x, skb, net_seq); + case XFRM_REPLAY_MODE_ESN: + return xfrm_replay_recheck_esn(x, skb, net_seq); + } + + return xfrm_replay_check(x, skb, net_seq); +} + static void xfrm_replay_advance_esn(struct xfrm_state *x, __be32 net_seq) { unsigned int bitnr, nr, i; @@ -708,37 +724,31 @@ static int xfrm_replay_overflow_offload_esn(struct xfrm_state *x, struct sk_buff static const struct xfrm_replay xfrm_replay_legacy = { .check = xfrm_replay_check, - .recheck = xfrm_replay_check, .overflow = xfrm_replay_overflow_offload, }; static const struct xfrm_replay xfrm_replay_bmp = { .check = xfrm_replay_check_bmp, - .recheck = xfrm_replay_check_bmp, .overflow = xfrm_replay_overflow_offload_bmp, }; static const struct xfrm_replay xfrm_replay_esn = { .check = xfrm_replay_check_esn, - .recheck = xfrm_replay_recheck_esn, .overflow = xfrm_replay_overflow_offload_esn, }; #else static const struct xfrm_replay xfrm_replay_legacy = { .check = xfrm_replay_check, - .recheck = xfrm_replay_check, .overflow = xfrm_replay_overflow, }; static const struct xfrm_replay xfrm_replay_bmp = { .check = xfrm_replay_check_bmp, - .recheck = xfrm_replay_check_bmp, .overflow = xfrm_replay_overflow_bmp, }; static const struct xfrm_replay xfrm_replay_esn = { .check = xfrm_replay_check_esn, - .recheck = xfrm_replay_recheck_esn, .overflow = xfrm_replay_overflow_esn, }; #endif