From patchwork Fri Nov 18 06:35:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 13047747 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 15AE3C4332F for ; Fri, 18 Nov 2022 06:35:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240956AbiKRGfr (ORCPT ); Fri, 18 Nov 2022 01:35:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47634 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240700AbiKRGfn (ORCPT ); Fri, 18 Nov 2022 01:35:43 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 934766455E for ; Thu, 17 Nov 2022 22:35:42 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 0313BCE1F82 for ; Fri, 18 Nov 2022 06:35:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9D9FBC433D6; Fri, 18 Nov 2022 06:35:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668753339; bh=LrhI8FVbYFio06JOlqmlD6Or5Dag8XI4A4p1sDJtON0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hBsjjapdXj9uufNNzs7QgOKLuC1OsexDeEH2pqMxBoECozI9Edvgf9Cgbp4xRZIFq mZybvTt8/CXpeDxXBTBRhh2kxbzatzVlIjsfEWv7Sr6paGzd/S/CHa6l89623Kp5xl P8ef1nzZ4X85XFzcI9WXi+T1nuczN+Ji5yPkLtJ/sPNwQX6LHOKRD0MyGcHn2fljdm bFzz1EEJmoAKdy42d6+h38iSMuK7LojPQRKtC0ClcoZD/fNVDtm+gXaNDmC3OpyGlj e2q29cBo5IdVcSfwAsBXC0sODpK+PP4vEsAJMDpbrQ9MHupyLHxv6Ihg0AMQImeimH fhAZ0Wnbuy1jg== From: Leon Romanovsky To: Steffen Klassert Cc: Leon Romanovsky , "David S. Miller" , Eric Dumazet , Herbert Xu , Jakub Kicinski , netdev@vger.kernel.org, Bharat Bhushan , Raed Salem Subject: [PATCH xfrm-next v8 1/8] xfrm: add new packet offload flag Date: Fri, 18 Nov 2022 08:35:21 +0200 Message-Id: X-Mailer: git-send-email 2.38.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Leon Romanovsky In the next patches, the xfrm core code will be extended to support new type of offload - packet offload. In that mode, both policy and state should be specially configured in order to perform whole offloaded data path. Full offload takes care of encryption, decryption, encapsulation and other operations with headers. As this mode is new for XFRM policy flow, we can "start fresh" with flag bits and release first and second bit for future use. Reviewed-by: Raed Salem Signed-off-by: Leon Romanovsky --- include/net/xfrm.h | 7 +++++++ include/uapi/linux/xfrm.h | 6 ++++++ net/xfrm/xfrm_device.c | 3 +++ net/xfrm/xfrm_user.c | 2 ++ 4 files changed, 18 insertions(+) diff --git a/include/net/xfrm.h b/include/net/xfrm.h index dbc81f5eb553..304001b76fc5 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -131,12 +131,19 @@ enum { XFRM_DEV_OFFLOAD_OUT, }; +enum { + XFRM_DEV_OFFLOAD_UNSPECIFIED, + XFRM_DEV_OFFLOAD_CRYPTO, + XFRM_DEV_OFFLOAD_PACKET, +}; + struct xfrm_dev_offload { struct net_device *dev; netdevice_tracker dev_tracker; struct net_device *real_dev; unsigned long offload_handle; u8 dir : 2; + u8 type : 2; }; struct xfrm_mode { diff --git a/include/uapi/linux/xfrm.h b/include/uapi/linux/xfrm.h index 4f84ea7ee14c..23543c33fee8 100644 --- a/include/uapi/linux/xfrm.h +++ b/include/uapi/linux/xfrm.h @@ -519,6 +519,12 @@ struct xfrm_user_offload { */ #define XFRM_OFFLOAD_IPV6 1 #define XFRM_OFFLOAD_INBOUND 2 +/* Two bits above are relevant for state path only, while + * offload is used for both policy and state flows. + * + * In policy offload mode, they are free and can be safely reused. + */ +#define XFRM_OFFLOAD_PACKET 4 struct xfrm_userpolicy_default { #define XFRM_USERPOLICY_UNSPEC 0 diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c index 5f5aafd418af..7c4e0f14df27 100644 --- a/net/xfrm/xfrm_device.c +++ b/net/xfrm/xfrm_device.c @@ -278,12 +278,15 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, else xso->dir = XFRM_DEV_OFFLOAD_OUT; + xso->type = XFRM_DEV_OFFLOAD_CRYPTO; + err = dev->xfrmdev_ops->xdo_dev_state_add(x); if (err) { xso->dev = NULL; xso->dir = 0; xso->real_dev = NULL; netdev_put(dev, &xso->dev_tracker); + xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED; if (err != -EOPNOTSUPP) { NL_SET_ERR_MSG(extack, "Device failed to offload this state"); diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index e73f9efc54c1..573b60873b60 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -943,6 +943,8 @@ static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb) xuo->ifindex = xso->dev->ifindex; if (xso->dir == XFRM_DEV_OFFLOAD_IN) xuo->flags = XFRM_OFFLOAD_INBOUND; + if (xso->type == XFRM_DEV_OFFLOAD_PACKET) + xuo->flags |= XFRM_OFFLOAD_PACKET; return 0; } From patchwork Fri Nov 18 06:35:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 13047748 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 9EEE5C433FE for ; Fri, 18 Nov 2022 06:35:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240936AbiKRGfs (ORCPT ); Fri, 18 Nov 2022 01:35:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240955AbiKRGfq (ORCPT ); Fri, 18 Nov 2022 01:35:46 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F2F6072120 for ; Thu, 17 Nov 2022 22:35:45 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A84A6B822A2 for ; Fri, 18 Nov 2022 06:35:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CC8CBC433C1; Fri, 18 Nov 2022 06:35:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668753343; bh=qsVUFVxJsA64EM4Jld8qE4LsdLzsev5s17Zj6FlIB6k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=O8YNwb//f0uskmTeX+RHMSTHP8mSms9NTrNGlWxTYsXP7GlSJz4ZLVjxdZUmKM4sL zU+SWrMQzQhZ+aUn9lRrbrFqoHV0/vi52zqMRSFc6Q3MYmXnXOMG+FLesP2a6x9Mzy 4SjeJYpkrAnMonscWHz1XZjQfwFcQBwWWk/M/cXdPu894SvUz767xLLPgNiXGW40Sl IOfFij5Vn0FPbnq33hzhj7dghXlbCNBcDuuC2SCIbRTLfgiR0RIGcqNuyZKopAaqIN uHeMjbWjPCbaL48Pch5i+daWemGwdMrT9jSgePxYAHKKP2d6KLWvv3OmS0aHZaaHk5 m5aXuEtBuSrIQ== From: Leon Romanovsky To: Steffen Klassert Cc: Leon Romanovsky , "David S. Miller" , Eric Dumazet , Herbert Xu , Jakub Kicinski , netdev@vger.kernel.org, Bharat Bhushan , Raed Salem Subject: [PATCH xfrm-next v8 2/8] xfrm: allow state packet offload mode Date: Fri, 18 Nov 2022 08:35:22 +0200 Message-Id: X-Mailer: git-send-email 2.38.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Leon Romanovsky Allow users to configure xfrm states with packet offload mode. The packet mode must be requested both for policy and state, and such requires us to do not implement fallback. We explicitly return an error if requested packet mode can't be configured. Reviewed-by: Raed Salem Signed-off-by: Leon Romanovsky --- .../inline_crypto/ch_ipsec/chcr_ipsec.c | 4 ++++ .../net/ethernet/intel/ixgbe/ixgbe_ipsec.c | 5 ++++ drivers/net/ethernet/intel/ixgbevf/ipsec.c | 5 ++++ .../mellanox/mlx5/core/en_accel/ipsec.c | 4 ++++ drivers/net/netdevsim/ipsec.c | 5 ++++ net/xfrm/xfrm_device.c | 24 +++++++++++++++---- 6 files changed, 42 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/chelsio/inline_crypto/ch_ipsec/chcr_ipsec.c b/drivers/net/ethernet/chelsio/inline_crypto/ch_ipsec/chcr_ipsec.c index 585590520076..ca21794281d6 100644 --- a/drivers/net/ethernet/chelsio/inline_crypto/ch_ipsec/chcr_ipsec.c +++ b/drivers/net/ethernet/chelsio/inline_crypto/ch_ipsec/chcr_ipsec.c @@ -283,6 +283,10 @@ static int ch_ipsec_xfrm_add_state(struct xfrm_state *x) pr_debug("Cannot offload xfrm states with geniv other than seqiv\n"); return -EINVAL; } + if (x->xso.type != XFRM_DEV_OFFLOAD_CRYPTO) { + pr_debug("Unsupported xfrm offload\n"); + return -EINVAL; + } sa_entry = kzalloc(sizeof(*sa_entry), GFP_KERNEL); if (!sa_entry) { diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c index 774de63dd93a..53a969e34883 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c @@ -585,6 +585,11 @@ static int ixgbe_ipsec_add_sa(struct xfrm_state *xs) return -EINVAL; } + if (xs->xso.type != XFRM_DEV_OFFLOAD_CRYPTO) { + netdev_err(dev, "Unsupported ipsec offload type\n"); + return -EINVAL; + } + if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) { struct rx_sa rsa; diff --git a/drivers/net/ethernet/intel/ixgbevf/ipsec.c b/drivers/net/ethernet/intel/ixgbevf/ipsec.c index 9984ebc62d78..c1cf540d162a 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ipsec.c +++ b/drivers/net/ethernet/intel/ixgbevf/ipsec.c @@ -280,6 +280,11 @@ static int ixgbevf_ipsec_add_sa(struct xfrm_state *xs) return -EINVAL; } + if (xs->xso.type != XFRM_DEV_OFFLOAD_CRYPTO) { + netdev_err(dev, "Unsupported ipsec offload type\n"); + return -EINVAL; + } + if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) { struct rx_sa rsa; diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c index 1b03ab03fc5a..e6411533f911 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c @@ -253,6 +253,10 @@ static inline int mlx5e_xfrm_validate_state(struct xfrm_state *x) netdev_info(netdev, "Cannot offload xfrm states with geniv other than seqiv\n"); return -EINVAL; } + if (x->xso.type != XFRM_DEV_OFFLOAD_CRYPTO) { + netdev_info(netdev, "Unsupported xfrm offload type\n"); + return -EINVAL; + } return 0; } diff --git a/drivers/net/netdevsim/ipsec.c b/drivers/net/netdevsim/ipsec.c index 386336a38f34..b93baf5c8bee 100644 --- a/drivers/net/netdevsim/ipsec.c +++ b/drivers/net/netdevsim/ipsec.c @@ -149,6 +149,11 @@ static int nsim_ipsec_add_sa(struct xfrm_state *xs) return -EINVAL; } + if (xs->xso.type != XFRM_DEV_OFFLOAD_CRYPTO) { + netdev_err(dev, "Unsupported ipsec offload type\n"); + return -EINVAL; + } + /* find the first unused index */ ret = nsim_ipsec_find_empty_idx(ipsec); if (ret < 0) { diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c index 7c4e0f14df27..dc4fb58dd7eb 100644 --- a/net/xfrm/xfrm_device.c +++ b/net/xfrm/xfrm_device.c @@ -216,6 +216,7 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_dev_offload *xso = &x->xso; xfrm_address_t *saddr; xfrm_address_t *daddr; + bool is_packet_offload; if (!x->type_offload) { NL_SET_ERR_MSG(extack, "Type doesn't support offload"); @@ -228,11 +229,13 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, return -EINVAL; } - if (xuo->flags & ~(XFRM_OFFLOAD_IPV6 | XFRM_OFFLOAD_INBOUND)) { + if (xuo->flags & + ~(XFRM_OFFLOAD_IPV6 | XFRM_OFFLOAD_INBOUND | XFRM_OFFLOAD_PACKET)) { NL_SET_ERR_MSG(extack, "Unrecognized flags in offload request"); return -EINVAL; } + is_packet_offload = xuo->flags & XFRM_OFFLOAD_PACKET; dev = dev_get_by_index(net, xuo->ifindex); if (!dev) { if (!(xuo->flags & XFRM_OFFLOAD_INBOUND)) { @@ -247,7 +250,7 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, x->props.family, xfrm_smark_get(0, x)); if (IS_ERR(dst)) - return 0; + return (is_packet_offload) ? -EINVAL : 0; dev = dst->dev; @@ -258,7 +261,7 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, if (!dev->xfrmdev_ops || !dev->xfrmdev_ops->xdo_dev_state_add) { xso->dev = NULL; dev_put(dev); - return 0; + return (is_packet_offload) ? -EINVAL : 0; } if (x->props.flags & XFRM_STATE_ESN && @@ -278,7 +281,10 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, else xso->dir = XFRM_DEV_OFFLOAD_OUT; - xso->type = XFRM_DEV_OFFLOAD_CRYPTO; + if (is_packet_offload) + xso->type = XFRM_DEV_OFFLOAD_PACKET; + else + xso->type = XFRM_DEV_OFFLOAD_CRYPTO; err = dev->xfrmdev_ops->xdo_dev_state_add(x); if (err) { @@ -288,7 +294,15 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, netdev_put(dev, &xso->dev_tracker); xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED; - if (err != -EOPNOTSUPP) { + /* User explicitly requested packet offload mode and configured + * policy in addition to the XFRM state. So be civil to users, + * and return an error instead of taking fallback path. + * + * This WARN_ON() can be seen as a documentation for driver + * authors to do not return -EOPNOTSUPP in packet offload mode. + */ + WARN_ON(err == -EOPNOTSUPP && is_packet_offload); + if (err != -EOPNOTSUPP || is_packet_offload) { NL_SET_ERR_MSG(extack, "Device failed to offload this state"); return err; } From patchwork Fri Nov 18 06:35:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 13047751 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 4B9B3C4332F for ; Fri, 18 Nov 2022 06:36:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241011AbiKRGgC (ORCPT ); Fri, 18 Nov 2022 01:36:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47756 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241139AbiKRGf6 (ORCPT ); Fri, 18 Nov 2022 01:35:58 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4195B72120 for ; Thu, 17 Nov 2022 22:35:57 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id C530162335 for ; Fri, 18 Nov 2022 06:35:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A418CC433D6; Fri, 18 Nov 2022 06:35:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668753356; bh=pejH6fLQY4Hqy6xfGNGdUuXgRt9xqi41vY5xOotqgTI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HVuPnfw+xCDoHcEpfF5ybf2FBY3JySxce+sb0tn1WIf5ByMkLF4mkSi9PJC8TIYhb LciD6ocQJRfG24X358CpcFkcJcfoA5QFzBWnDha0ZWesarjHNTPaxY0oG6TmH0DMOr fQrfGtTqVRSiSRYzpVMSKeB2ojlmPQnWGEEndkEHCv2JS3jMDmKdB5t36lYbgzGx+e fRPcd0ZeztpW/G60MAqn2NLFaYRFboAHqFttz4YbQcLckAGlOSKh38o/GRuNZBhISr dL+LcxsJsQSkx/Zxmz0jZY1gVgVoEQjG2HXwBqB1zud/Ly70CkT9XxkqSD/03bP9V6 qpRw2c3IdaZxg== From: Leon Romanovsky To: Steffen Klassert Cc: Leon Romanovsky , "David S. Miller" , Eric Dumazet , Herbert Xu , Jakub Kicinski , netdev@vger.kernel.org, Bharat Bhushan Subject: [PATCH xfrm-next v8 3/8] xfrm: add an interface to offload policy Date: Fri, 18 Nov 2022 08:35:23 +0200 Message-Id: <69436589f66800d6d3f0a8bcc589aab4cdfb538e.1668753030.git.leonro@nvidia.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Leon Romanovsky Extend netlink interface to add and delete XFRM policy from the device. This functionality is a first step to implement packet IPsec offload solution. Signed-off-by: Raed Salem Signed-off-by: Leon Romanovsky --- include/linux/netdevice.h | 3 ++ include/net/xfrm.h | 45 +++++++++++++++++++++++++ net/xfrm/xfrm_device.c | 67 ++++++++++++++++++++++++++++++++++++- net/xfrm/xfrm_policy.c | 69 +++++++++++++++++++++++++++++++++++++++ net/xfrm/xfrm_user.c | 18 ++++++++++ 5 files changed, 201 insertions(+), 1 deletion(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 23b3903b0678..40dff55fad25 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1040,6 +1040,9 @@ struct xfrmdev_ops { bool (*xdo_dev_offload_ok) (struct sk_buff *skb, struct xfrm_state *x); void (*xdo_dev_state_advance_esn) (struct xfrm_state *x); + int (*xdo_dev_policy_add) (struct xfrm_policy *x); + void (*xdo_dev_policy_delete) (struct xfrm_policy *x); + void (*xdo_dev_policy_free) (struct xfrm_policy *x); }; #endif diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 304001b76fc5..e9c0cc245623 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -129,6 +129,7 @@ struct xfrm_state_walk { enum { XFRM_DEV_OFFLOAD_IN = 1, XFRM_DEV_OFFLOAD_OUT, + XFRM_DEV_OFFLOAD_FWD, }; enum { @@ -541,6 +542,8 @@ struct xfrm_policy { struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; struct hlist_node bydst_inexact_list; struct rcu_head rcu; + + struct xfrm_dev_offload xdo; }; static inline struct net *xp_net(const struct xfrm_policy *xp) @@ -1585,6 +1588,8 @@ struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); int xfrm_state_delete(struct xfrm_state *x); int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync); int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid); +int xfrm_dev_policy_flush(struct net *net, struct net_device *dev, + bool task_valid); void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); @@ -1897,6 +1902,9 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo, struct netlink_ext_ack *extack); +int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp, + struct xfrm_user_offload *xuo, u8 dir, + struct netlink_ext_ack *extack); bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x); static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) @@ -1945,6 +1953,28 @@ static inline void xfrm_dev_state_free(struct xfrm_state *x) netdev_put(dev, &xso->dev_tracker); } } + +static inline void xfrm_dev_policy_delete(struct xfrm_policy *x) +{ + struct xfrm_dev_offload *xdo = &x->xdo; + struct net_device *dev = xdo->dev; + + if (dev && dev->xfrmdev_ops && dev->xfrmdev_ops->xdo_dev_policy_delete) + dev->xfrmdev_ops->xdo_dev_policy_delete(x); +} + +static inline void xfrm_dev_policy_free(struct xfrm_policy *x) +{ + struct xfrm_dev_offload *xdo = &x->xdo; + struct net_device *dev = xdo->dev; + + if (dev && dev->xfrmdev_ops) { + if (dev->xfrmdev_ops->xdo_dev_policy_free) + dev->xfrmdev_ops->xdo_dev_policy_free(x); + xdo->dev = NULL; + netdev_put(dev, &xdo->dev_tracker); + } +} #else static inline void xfrm_dev_resume(struct sk_buff *skb) { @@ -1972,6 +2002,21 @@ static inline void xfrm_dev_state_free(struct xfrm_state *x) { } +static inline int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp, + struct xfrm_user_offload *xuo, u8 dir, + struct netlink_ext_ack *extack) +{ + return 0; +} + +static inline void xfrm_dev_policy_delete(struct xfrm_policy *x) +{ +} + +static inline void xfrm_dev_policy_free(struct xfrm_policy *x) +{ +} + static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) { return false; diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c index dc4fb58dd7eb..8e18abc5016f 100644 --- a/net/xfrm/xfrm_device.c +++ b/net/xfrm/xfrm_device.c @@ -312,6 +312,69 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, } EXPORT_SYMBOL_GPL(xfrm_dev_state_add); +int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp, + struct xfrm_user_offload *xuo, u8 dir, + struct netlink_ext_ack *extack) +{ + struct xfrm_dev_offload *xdo = &xp->xdo; + struct net_device *dev; + int err; + + if (!xuo->flags || xuo->flags & ~XFRM_OFFLOAD_PACKET) { + /* We support only packet offload mode and it means + * that user must set XFRM_OFFLOAD_PACKET bit. + */ + NL_SET_ERR_MSG(extack, "Unrecognized flags in offload request"); + return -EINVAL; + } + + dev = dev_get_by_index(net, xuo->ifindex); + if (!dev) + return -EINVAL; + + if (!dev->xfrmdev_ops || !dev->xfrmdev_ops->xdo_dev_policy_add) { + xdo->dev = NULL; + dev_put(dev); + NL_SET_ERR_MSG(extack, "Policy offload is not supported"); + return -EINVAL; + } + + xdo->dev = dev; + netdev_tracker_alloc(dev, &xdo->dev_tracker, GFP_ATOMIC); + xdo->real_dev = dev; + xdo->type = XFRM_DEV_OFFLOAD_PACKET; + switch (dir) { + case XFRM_POLICY_IN: + xdo->dir = XFRM_DEV_OFFLOAD_IN; + break; + case XFRM_POLICY_OUT: + xdo->dir = XFRM_DEV_OFFLOAD_OUT; + break; + case XFRM_POLICY_FWD: + xdo->dir = XFRM_DEV_OFFLOAD_FWD; + break; + default: + xdo->dev = NULL; + dev_put(dev); + NL_SET_ERR_MSG(extack, "Unrecognized oflload direction"); + return -EINVAL; + } + + err = dev->xfrmdev_ops->xdo_dev_policy_add(xp); + if (err) { + xdo->dev = NULL; + xdo->real_dev = NULL; + xdo->type = XFRM_DEV_OFFLOAD_UNSPECIFIED; + xdo->dir = 0; + netdev_put(dev, &xdo->dev_tracker); + NL_SET_ERR_MSG(extack, "Device failed to offload this policy"); + return err; + } + + return 0; +} +EXPORT_SYMBOL_GPL(xfrm_dev_policy_add); + bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) { int mtu; @@ -414,8 +477,10 @@ static int xfrm_api_check(struct net_device *dev) static int xfrm_dev_down(struct net_device *dev) { - if (dev->features & NETIF_F_HW_ESP) + if (dev->features & NETIF_F_HW_ESP) { xfrm_dev_state_flush(dev_net(dev), dev, true); + xfrm_dev_policy_flush(dev_net(dev), dev, true); + } return NOTIFY_DONE; } diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index d80519c4e389..07f43729ac4e 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -425,6 +425,7 @@ void xfrm_policy_destroy(struct xfrm_policy *policy) if (del_timer(&policy->timer) || del_timer(&policy->polq.hold_timer)) BUG(); + xfrm_dev_policy_free(policy); call_rcu(&policy->rcu, xfrm_policy_destroy_rcu); } EXPORT_SYMBOL(xfrm_policy_destroy); @@ -1769,12 +1770,41 @@ xfrm_policy_flush_secctx_check(struct net *net, u8 type, bool task_valid) } return err; } + +static inline int xfrm_dev_policy_flush_secctx_check(struct net *net, + struct net_device *dev, + bool task_valid) +{ + struct xfrm_policy *pol; + int err = 0; + + list_for_each_entry(pol, &net->xfrm.policy_all, walk.all) { + if (pol->walk.dead || + xfrm_policy_id2dir(pol->index) >= XFRM_POLICY_MAX || + pol->xdo.dev != dev) + continue; + + err = security_xfrm_policy_delete(pol->security); + if (err) { + xfrm_audit_policy_delete(pol, 0, task_valid); + return err; + } + } + return err; +} #else static inline int xfrm_policy_flush_secctx_check(struct net *net, u8 type, bool task_valid) { return 0; } + +static inline int xfrm_dev_policy_flush_secctx_check(struct net *net, + struct net_device *dev, + bool task_valid) +{ + return 0; +} #endif int xfrm_policy_flush(struct net *net, u8 type, bool task_valid) @@ -1814,6 +1844,44 @@ int xfrm_policy_flush(struct net *net, u8 type, bool task_valid) } EXPORT_SYMBOL(xfrm_policy_flush); +int xfrm_dev_policy_flush(struct net *net, struct net_device *dev, + bool task_valid) +{ + int dir, err = 0, cnt = 0; + struct xfrm_policy *pol; + + spin_lock_bh(&net->xfrm.xfrm_policy_lock); + + err = xfrm_dev_policy_flush_secctx_check(net, dev, task_valid); + if (err) + goto out; + +again: + list_for_each_entry(pol, &net->xfrm.policy_all, walk.all) { + dir = xfrm_policy_id2dir(pol->index); + if (pol->walk.dead || + dir >= XFRM_POLICY_MAX || + pol->xdo.dev != dev) + continue; + + __xfrm_policy_unlink(pol, dir); + spin_unlock_bh(&net->xfrm.xfrm_policy_lock); + cnt++; + xfrm_audit_policy_delete(pol, 1, task_valid); + xfrm_policy_kill(pol); + spin_lock_bh(&net->xfrm.xfrm_policy_lock); + goto again; + } + if (cnt) + __xfrm_policy_inexact_flush(net); + else + err = -ESRCH; +out: + spin_unlock_bh(&net->xfrm.xfrm_policy_lock); + return err; +} +EXPORT_SYMBOL(xfrm_dev_policy_flush); + int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, int (*func)(struct xfrm_policy *, int, int, void*), void *data) @@ -2245,6 +2313,7 @@ int xfrm_policy_delete(struct xfrm_policy *pol, int dir) pol = __xfrm_policy_unlink(pol, dir); spin_unlock_bh(&net->xfrm.xfrm_policy_lock); if (pol) { + xfrm_dev_policy_delete(pol); xfrm_policy_kill(pol); return 0; } diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 573b60873b60..e2b563395656 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -1869,6 +1869,15 @@ static struct xfrm_policy *xfrm_policy_construct(struct net *net, if (attrs[XFRMA_IF_ID]) xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]); + /* configure the hardware if offload is requested */ + if (attrs[XFRMA_OFFLOAD_DEV]) { + err = xfrm_dev_policy_add(net, xp, + nla_data(attrs[XFRMA_OFFLOAD_DEV]), + p->dir, extack); + if (err) + goto error; + } + return xp; error: *errp = err; @@ -1908,6 +1917,7 @@ static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, xfrm_audit_policy_add(xp, err ? 0 : 1, true); if (err) { + xfrm_dev_policy_delete(xp); security_xfrm_policy_free(xp->security); kfree(xp); return err; @@ -2020,6 +2030,8 @@ static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr err = xfrm_mark_put(skb, &xp->mark); if (!err) err = xfrm_if_id_put(skb, xp->if_id); + if (!err && xp->xdo.dev) + err = copy_user_offload(&xp->xdo, skb); if (err) { nlmsg_cancel(skb, nlh); return err; @@ -3343,6 +3355,8 @@ static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, err = xfrm_mark_put(skb, &xp->mark); if (!err) err = xfrm_if_id_put(skb, xp->if_id); + if (!err && xp->xdo.dev) + err = copy_user_offload(&xp->xdo, skb); if (err) { nlmsg_cancel(skb, nlh); return err; @@ -3461,6 +3475,8 @@ static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, err = xfrm_mark_put(skb, &xp->mark); if (!err) err = xfrm_if_id_put(skb, xp->if_id); + if (!err && xp->xdo.dev) + err = copy_user_offload(&xp->xdo, skb); if (err) { nlmsg_cancel(skb, nlh); return err; @@ -3544,6 +3560,8 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_e err = xfrm_mark_put(skb, &xp->mark); if (!err) err = xfrm_if_id_put(skb, xp->if_id); + if (!err && xp->xdo.dev) + err = copy_user_offload(&xp->xdo, skb); if (err) goto out_free_skb; From patchwork Fri Nov 18 06:35:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 13047749 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 5FA4AC4332F for ; Fri, 18 Nov 2022 06:36:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241120AbiKRGf7 (ORCPT ); Fri, 18 Nov 2022 01:35:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47764 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241009AbiKRGfw (ORCPT ); Fri, 18 Nov 2022 01:35:52 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 532B174CD5 for ; Thu, 17 Nov 2022 22:35:50 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id F0A42B8229C for ; Fri, 18 Nov 2022 06:35:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 35E74C433C1; Fri, 18 Nov 2022 06:35:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668753347; bh=9tCTtXs76v/GZvuTuuScTFdMZC4fvPZTd/sX7KDjTyw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dy1RfkUInkh189EiCHATD229BB7tQRkYX5EdUg4P7lZsjNfZExpQp1ZRPnf8zXXEk Gp/XVnNRpcHHrMRkG4d7bsBqJe52K97ecFYmju1T8y4eeN/sV6cHLJEWRgJ4T/NAPW gVd0LFpzkhpkKmkDEdOS1pPHye3Syx1O8aoVnJBEdrjo2tWboQ4xpibJEJzlQKO793 1/UV9HbOasf4yErGjQs58BCe6ZeKUsAgzSrNtpw5sBa7GwSOd/TW428fgAZiulMPMT XUW++UuTVfAl6YjchprhWMjXxGuWDpHVGmroTq1tA+V5go2jCJx6pXlbBU2x/JtR09 3UmvhCudh8XJw== From: Leon Romanovsky To: Steffen Klassert Cc: Leon Romanovsky , "David S. Miller" , Eric Dumazet , Herbert Xu , Jakub Kicinski , netdev@vger.kernel.org, Bharat Bhushan Subject: [PATCH xfrm-next v8 4/8] xfrm: add TX datapath support for IPsec packet offload mode Date: Fri, 18 Nov 2022 08:35:24 +0200 Message-Id: X-Mailer: git-send-email 2.38.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Leon Romanovsky In IPsec packet mode, the device is going to encrypt and encapsulate packets that are associated with offloaded policy. After successful policy lookup to indicate if packets should be offloaded or not, the stack forwards packets to the device to do the magic. Signed-off-by: Raed Salem Signed-off-by: Huy Nguyen Signed-off-by: Leon Romanovsky --- net/xfrm/xfrm_device.c | 15 +++++++++++++-- net/xfrm/xfrm_output.c | 12 +++++++++++- net/xfrm/xfrm_policy.c | 21 ++++++++++++++++++++- 3 files changed, 44 insertions(+), 4 deletions(-) diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c index 8e18abc5016f..6affb3d1e204 100644 --- a/net/xfrm/xfrm_device.c +++ b/net/xfrm/xfrm_device.c @@ -120,6 +120,16 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur if (xo->flags & XFRM_GRO || x->xso.dir == XFRM_DEV_OFFLOAD_IN) return skb; + /* The packet was sent to HW IPsec packet offload engine, + * but to wrong device. Drop the packet, so it won't skip + * XFRM stack. + */ + if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET && x->xso.dev != dev) { + kfree_skb(skb); + dev_core_stats_tx_dropped_inc(dev); + return NULL; + } + /* This skb was already validated on the upper/virtual dev */ if ((x->xso.dev != dev) && (x->xso.real_dev == dev)) return skb; @@ -385,8 +395,9 @@ bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) if (!x->type_offload || x->encap) return false; - if ((!dev || (dev == xfrm_dst_path(dst)->dev)) && - (!xdst->child->xfrm)) { + if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET || + ((!dev || (dev == xfrm_dst_path(dst)->dev)) && + !xdst->child->xfrm)) { mtu = xfrm_state_mtu(x, xdst->child_mtu_cached); if (skb->len <= mtu) goto ok; diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c index 9a5e79a38c67..ce9e360a96e2 100644 --- a/net/xfrm/xfrm_output.c +++ b/net/xfrm/xfrm_output.c @@ -494,7 +494,7 @@ static int xfrm_output_one(struct sk_buff *skb, int err) struct xfrm_state *x = dst->xfrm; struct net *net = xs_net(x); - if (err <= 0) + if (err <= 0 || x->xso.type == XFRM_DEV_OFFLOAD_PACKET) goto resume; do { @@ -718,6 +718,16 @@ int xfrm_output(struct sock *sk, struct sk_buff *skb) break; } + if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET) { + if (!xfrm_dev_offload_ok(skb, x)) { + XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR); + kfree_skb(skb); + return -EHOSTUNREACH; + } + + return xfrm_output_resume(sk, skb, 0); + } + secpath_reset(skb); if (xfrm_dev_offload_ok(skb, x)) { diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 07f43729ac4e..06226942a152 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -2619,6 +2619,7 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy, int tos; int family = policy->selector.family; xfrm_address_t saddr, daddr; + struct dst_entry *dst1; xfrm_flowi_addr_get(fl, &saddr, &daddr, family); @@ -2628,7 +2629,8 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy, for (; i < nx; i++) { struct xfrm_dst *xdst = xfrm_alloc_dst(net, family); - struct dst_entry *dst1 = &xdst->u.dst; + + dst1 = &xdst->u.dst; err = PTR_ERR(xdst); if (IS_ERR(xdst)) { @@ -2708,6 +2710,23 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy, if (!dev) goto free_dst; + dst1 = &xdst0->u.dst; + /* Packet offload: both policy and SA should be offloaded */ + if ((policy->xdo.type == XFRM_DEV_OFFLOAD_PACKET && + dst1->xfrm->xso.type != XFRM_DEV_OFFLOAD_PACKET) || + (policy->xdo.type != XFRM_DEV_OFFLOAD_PACKET && + dst1->xfrm->xso.type == XFRM_DEV_OFFLOAD_PACKET)) { + err = -EINVAL; + goto free_dst; + } + + /* Packet offload: both policy and SA should have same device */ + if (policy->xdo.type == XFRM_DEV_OFFLOAD_PACKET && + policy->xdo.dev != dst1->xfrm->xso.dev) { + err = -EINVAL; + goto free_dst; + } + xfrm_init_path(xdst0, dst, nfheader_len); xfrm_init_pmtu(bundle, nx); From patchwork Fri Nov 18 06:35:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 13047750 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 70E1DC433FE for ; Fri, 18 Nov 2022 06:36:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241009AbiKRGgA (ORCPT ); Fri, 18 Nov 2022 01:36:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47846 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240700AbiKRGf5 (ORCPT ); Fri, 18 Nov 2022 01:35:57 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 84EB898279 for ; Thu, 17 Nov 2022 22:35:54 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 3F28AB822A5 for ; Fri, 18 Nov 2022 06:35:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 63791C433C1; Fri, 18 Nov 2022 06:35:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668753351; bh=jqKDySuwsef5aF9XrBVOEIwG8N8/BWc1llip0fwIOl4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=e3wGSzevoX+E3QLdiVxcEnFJTkVJh2Dis6h9udKO0eb6s7EXoPVOAGbwINi9vYk8o m2lWEBh1U4c2nVVVfcwSLmxFq04RaoswbGiAZiESozV6XeOfFQNBEgIJgwjGwdYaMx EnGzNChLmnwU66VWV7GNWCZPVc3u2KNUcclaue7cRZOp0IDS6cSAlYi3Lqvp1ftpai t+ZvRoI+/fJHvk2Lkbl4pJJlZsYLBUx+cACMU4WBH7kcSyC1zk4rE3QC9ZqqFDfudq 56MraV0KduO4oWoFTCj/bXwLhBCOlMR9FFkP8zdciW+Ws0X9nEpDUZ00HlanJ3w3Nc 4BZlb6WijofTg== From: Leon Romanovsky To: Steffen Klassert Cc: Leon Romanovsky , "David S. Miller" , Eric Dumazet , Herbert Xu , Jakub Kicinski , netdev@vger.kernel.org, Bharat Bhushan , Raed Salem Subject: [PATCH xfrm-next v8 5/8] xfrm: add RX datapath protection for IPsec packet offload mode Date: Fri, 18 Nov 2022 08:35:25 +0200 Message-Id: X-Mailer: git-send-email 2.38.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Leon Romanovsky Traffic received by device with enabled IPsec packet offload should be forwarded to the stack only after decryption, packet headers and trailers removed. Such packets are expected to be seen as normal (non-XFRM) ones, while not-supported packets should be dropped by the HW. Reviewed-by: Raed Salem Signed-off-by: Leon Romanovsky --- include/net/xfrm.h | 55 +++++++++++++++++++++++++++------------------- 1 file changed, 32 insertions(+), 23 deletions(-) diff --git a/include/net/xfrm.h b/include/net/xfrm.h index e9c0cc245623..00ce7a68bf3c 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -1102,6 +1102,29 @@ xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, un return !0; } +#ifdef CONFIG_XFRM +static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) +{ + struct sec_path *sp = skb_sec_path(skb); + + return sp->xvec[sp->len - 1]; +} +#endif + +static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb) +{ +#ifdef CONFIG_XFRM + struct sec_path *sp = skb_sec_path(skb); + + if (!sp || !sp->olen || sp->len != sp->olen) + return NULL; + + return &sp->ovec[sp->olen - 1]; +#else + return NULL; +#endif +} + #ifdef CONFIG_XFRM int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); @@ -1133,10 +1156,19 @@ static inline int __xfrm_policy_check2(struct sock *sk, int dir, { struct net *net = dev_net(skb->dev); int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); + struct xfrm_offload *xo = xfrm_offload(skb); + struct xfrm_state *x; if (sk && sk->sk_policy[XFRM_POLICY_IN]) return __xfrm_policy_check(sk, ndir, skb, family); + if (xo) { + x = xfrm_input_state(skb); + if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET) + return (xo->flags & CRYPTO_DONE) && + (xo->status & CRYPTO_SUCCESS); + } + return __xfrm_check_nopolicy(net, skb, dir) || __xfrm_check_dev_nopolicy(skb, dir, family) || __xfrm_policy_check(sk, ndir, skb, family); @@ -1870,29 +1902,6 @@ static inline void xfrm_states_delete(struct xfrm_state **states, int n) } #endif -#ifdef CONFIG_XFRM -static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) -{ - struct sec_path *sp = skb_sec_path(skb); - - return sp->xvec[sp->len - 1]; -} -#endif - -static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb) -{ -#ifdef CONFIG_XFRM - struct sec_path *sp = skb_sec_path(skb); - - if (!sp || !sp->olen || sp->len != sp->olen) - return NULL; - - return &sp->ovec[sp->olen - 1]; -#else - return NULL; -#endif -} - void __init xfrm_dev_init(void); #ifdef CONFIG_XFRM_OFFLOAD From patchwork Fri Nov 18 06:35:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 13047754 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 2AD05C433FE for ; Fri, 18 Nov 2022 06:36:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241175AbiKRGgZ (ORCPT ); Fri, 18 Nov 2022 01:36:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48144 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241132AbiKRGgP (ORCPT ); Fri, 18 Nov 2022 01:36:15 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5D27C9827A for ; Thu, 17 Nov 2022 22:36:11 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 1A570B822A1 for ; Fri, 18 Nov 2022 06:36:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3C983C433D6; Fri, 18 Nov 2022 06:36:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668753368; bh=XNOmn8DDx5XZ8GQ1zq+LwxDYC7wI5l8l6bB1pijnXmg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F1/H9HV6GmmsASNalHBSXTBuKH3Y7NP3a5NvG21lGXXmpDgDuG9mV+ln/WE66eWon bwm6nu44YAeXVcJEN3kSZeF19FlDCOEwDJjwYJe7zobsNXLzyIOei1PLFVcXekkoVe w0EQlmMZ8dOmbpNrz2UMWjENKSjIOjw2xmH4zec+I/U24nodeznJA3S427It+mafUN V1EybKpp5k753a2PSf+WYM6f3Q1VjOVuPxwBbd2MuBobk+qwK5XRgeX9IPCmeziNe5 lNJ+vhp/9xUazIMNT3o9+LVq9nu2k8iQKlgvRIMR9kGT+3ZXKxhFYuqzT+qNbm8E+Z 8QhIveG2YWStw== From: Leon Romanovsky To: Steffen Klassert Cc: Leon Romanovsky , "David S. Miller" , Eric Dumazet , Herbert Xu , Jakub Kicinski , netdev@vger.kernel.org, Bharat Bhushan Subject: [PATCH xfrm-next v8 6/8] xfrm: speed-up lookup of HW policies Date: Fri, 18 Nov 2022 08:35:26 +0200 Message-Id: X-Mailer: git-send-email 2.38.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Leon Romanovsky Devices that implement IPsec packet offload mode should offload SA and policies too. In RX path, it causes to the situation that HW will always have higher priority over any SW policies. It means that we don't need to perform any search of inexact policies and/or priority checks if HW policy was discovered. In such situation, the HW will catch the packets anyway and HW can still implement inexact lookups. In case specific policy is not found, we will continue with packet lookup and check for existence of HW policies in inexact list. HW policies are added to the head of SPD to ensure fast lookup, as XFRM iterates over all policies in the loop. The same solution of adding HW SAs at the begging of the list is applied to SA database too. However, we don't need to change lookups as they are sorted by insertion order and not priority. Signed-off-by: Leon Romanovsky --- net/xfrm/xfrm_policy.c | 16 ++++++---- net/xfrm/xfrm_state.c | 66 ++++++++++++++++++++++++++++++++---------- 2 files changed, 62 insertions(+), 20 deletions(-) diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 06226942a152..93a4a9149f8c 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -536,7 +536,7 @@ static void xfrm_dst_hash_transfer(struct net *net, __get_hash_thresh(net, pol->family, dir, &dbits, &sbits); h = __addr_hash(&pol->selector.daddr, &pol->selector.saddr, pol->family, nhashmask, dbits, sbits); - if (!entry0) { + if (!entry0 || pol->xdo.type == XFRM_DEV_OFFLOAD_PACKET) { hlist_del_rcu(&pol->bydst); hlist_add_head_rcu(&pol->bydst, ndsttable + h); h0 = h; @@ -867,7 +867,7 @@ static void xfrm_policy_inexact_list_reinsert(struct net *net, break; } - if (newpos) + if (newpos && policy->xdo.type != XFRM_DEV_OFFLOAD_PACKET) hlist_add_behind_rcu(&policy->bydst, newpos); else hlist_add_head_rcu(&policy->bydst, &n->hhead); @@ -1348,7 +1348,7 @@ static void xfrm_hash_rebuild(struct work_struct *work) else break; } - if (newpos) + if (newpos && policy->xdo.type != XFRM_DEV_OFFLOAD_PACKET) hlist_add_behind_rcu(&policy->bydst, newpos); else hlist_add_head_rcu(&policy->bydst, chain); @@ -1525,7 +1525,7 @@ static void xfrm_policy_insert_inexact_list(struct hlist_head *chain, break; } - if (newpos) + if (newpos && policy->xdo.type != XFRM_DEV_OFFLOAD_PACKET) hlist_add_behind_rcu(&policy->bydst_inexact_list, newpos); else hlist_add_head_rcu(&policy->bydst_inexact_list, chain); @@ -1562,9 +1562,12 @@ static struct xfrm_policy *xfrm_policy_insert_list(struct hlist_head *chain, break; } - if (newpos) + if (newpos && policy->xdo.type != XFRM_DEV_OFFLOAD_PACKET) hlist_add_behind_rcu(&policy->bydst, &newpos->bydst); else + /* Packet offload policies enter to the head + * to speed-up lookups. + */ hlist_add_head_rcu(&policy->bydst, chain); return delpol; @@ -2181,6 +2184,9 @@ static struct xfrm_policy *xfrm_policy_lookup_bytype(struct net *net, u8 type, break; } } + if (ret && ret->xdo.type == XFRM_DEV_OFFLOAD_PACKET) + goto skip_inexact; + bin = xfrm_policy_inexact_lookup_rcu(net, type, family, dir, if_id); if (!bin || !xfrm_policy_find_inexact_candidates(&cand, bin, saddr, daddr)) diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index 3d2fe7712ac5..cfc8c72b173d 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -84,6 +84,25 @@ static unsigned int xfrm_seq_hash(struct net *net, u32 seq) return __xfrm_seq_hash(seq, net->xfrm.state_hmask); } +#define XFRM_STATE_INSERT(by, _n, _h, _type) \ + { \ + struct xfrm_state *_x = NULL; \ + \ + if (_type != XFRM_DEV_OFFLOAD_PACKET) { \ + hlist_for_each_entry_rcu(_x, _h, by) { \ + if (_x->xso.type == XFRM_DEV_OFFLOAD_PACKET) \ + continue; \ + break; \ + } \ + } \ + \ + if (!_x || _x->xso.type == XFRM_DEV_OFFLOAD_PACKET) \ + /* SAD is empty or consist from HW SAs only */ \ + hlist_add_head_rcu(_n, _h); \ + else \ + hlist_add_before_rcu(_n, &_x->by); \ + } + static void xfrm_hash_transfer(struct hlist_head *list, struct hlist_head *ndsttable, struct hlist_head *nsrctable, @@ -100,23 +119,25 @@ static void xfrm_hash_transfer(struct hlist_head *list, h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, x->props.reqid, x->props.family, nhashmask); - hlist_add_head_rcu(&x->bydst, ndsttable + h); + XFRM_STATE_INSERT(bydst, &x->bydst, ndsttable + h, x->xso.type); h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, x->props.family, nhashmask); - hlist_add_head_rcu(&x->bysrc, nsrctable + h); + XFRM_STATE_INSERT(bysrc, &x->bysrc, nsrctable + h, x->xso.type); if (x->id.spi) { h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, x->props.family, nhashmask); - hlist_add_head_rcu(&x->byspi, nspitable + h); + XFRM_STATE_INSERT(byspi, &x->byspi, nspitable + h, + x->xso.type); } if (x->km.seq) { h = __xfrm_seq_hash(x->km.seq, nhashmask); - hlist_add_head_rcu(&x->byseq, nseqtable + h); + XFRM_STATE_INSERT(byseq, &x->byseq, nseqtable + h, + x->xso.type); } } } @@ -1166,16 +1187,24 @@ xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, spin_lock_bh(&net->xfrm.xfrm_state_lock); x->km.state = XFRM_STATE_ACQ; list_add(&x->km.all, &net->xfrm.state_all); - hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); + XFRM_STATE_INSERT(bydst, &x->bydst, + net->xfrm.state_bydst + h, + x->xso.type); h = xfrm_src_hash(net, daddr, saddr, encap_family); - hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); + XFRM_STATE_INSERT(bysrc, &x->bysrc, + net->xfrm.state_bysrc + h, + x->xso.type); if (x->id.spi) { h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); - hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); + XFRM_STATE_INSERT(byspi, &x->byspi, + net->xfrm.state_byspi + h, + x->xso.type); } if (x->km.seq) { h = xfrm_seq_hash(net, x->km.seq); - hlist_add_head_rcu(&x->byseq, net->xfrm.state_byseq + h); + XFRM_STATE_INSERT(byseq, &x->byseq, + net->xfrm.state_byseq + h, + x->xso.type); } x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; hrtimer_start(&x->mtimer, @@ -1280,22 +1309,26 @@ static void __xfrm_state_insert(struct xfrm_state *x) h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, x->props.reqid, x->props.family); - hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); + XFRM_STATE_INSERT(bydst, &x->bydst, net->xfrm.state_bydst + h, + x->xso.type); h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); - hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); + XFRM_STATE_INSERT(bysrc, &x->bysrc, net->xfrm.state_bysrc + h, + x->xso.type); if (x->id.spi) { h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); - hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); + XFRM_STATE_INSERT(byspi, &x->byspi, net->xfrm.state_byspi + h, + x->xso.type); } if (x->km.seq) { h = xfrm_seq_hash(net, x->km.seq); - hlist_add_head_rcu(&x->byseq, net->xfrm.state_byseq + h); + XFRM_STATE_INSERT(byseq, &x->byseq, net->xfrm.state_byseq + h, + x->xso.type); } hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL_SOFT); @@ -1409,9 +1442,11 @@ static struct xfrm_state *__find_acq_core(struct net *net, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL_SOFT); list_add(&x->km.all, &net->xfrm.state_all); - hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); + XFRM_STATE_INSERT(bydst, &x->bydst, net->xfrm.state_bydst + h, + x->xso.type); h = xfrm_src_hash(net, daddr, saddr, family); - hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); + XFRM_STATE_INSERT(bysrc, &x->bysrc, net->xfrm.state_bysrc + h, + x->xso.type); net->xfrm.state_num++; @@ -2085,7 +2120,8 @@ int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) spin_lock_bh(&net->xfrm.xfrm_state_lock); x->id.spi = newspi; h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); - hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); + XFRM_STATE_INSERT(byspi, &x->byspi, net->xfrm.state_byspi + h, + x->xso.type); spin_unlock_bh(&net->xfrm.xfrm_state_lock); err = 0; From patchwork Fri Nov 18 06:35:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 13047752 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 46C57C433FE for ; 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c=relaxed/simple; d=kernel.org; s=k20201202; t=1668753360; bh=MqlBXv0vD45Z1GaGMXMWr+UYrWtOGgxfz/wBPNEWZzU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eynK4lVLthUqIB5dlQsVFsG262CIfyda1/ZYvv+O52uTzYdDzlIi/jj7mD3/b8A/y 9ErjugmexwyHB4skxbvSfx+2ZGO8ViKKcM3fdjGgqY9Cpmfmm8nOskD6bBbQWvX67+ m13dfmowLYpnOtWSaWyNMEkjoLLzoIxPJh/p0/Bn983m5kDbuVKjFF3FTlqtaH7Y1E lhqdkFfXmi3hXNXHCSPbSPRxhmkJVv8o4/cZgvqRF74sGgATi6va+V/1qOMIfD6Gsv LrmyhodBKxtKO6nvJYjVU/v0S7/ZBJDoUYY3dkKNrHdIAwqL/mvxtUkfCK2/1Gbf4i GejcA61fO2eJA== From: Leon Romanovsky To: Steffen Klassert Cc: Leon Romanovsky , "David S. Miller" , Eric Dumazet , Herbert Xu , Jakub Kicinski , netdev@vger.kernel.org, Bharat Bhushan Subject: [PATCH xfrm-next v8 7/8] xfrm: add support to HW update soft and hard limits Date: Fri, 18 Nov 2022 08:35:27 +0200 Message-Id: <683fc0b79cfe8e49c3914e48707a8ac5bde5a70c.1668753030.git.leonro@nvidia.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Leon Romanovsky Both in RX and TX, the traffic that performs IPsec packet offload transformation is accounted by HW. It is needed to properly handle hard limits that require to drop the packet. It means that XFRM core needs to update internal counters with the one that accounted by the HW, so new callbacks are introduced in this patch. In case of soft or hard limit is occurred, the driver should call to xfrm_state_check_expire() that will perform key rekeying exactly as done by XFRM core. Signed-off-by: Leon Romanovsky --- include/linux/netdevice.h | 1 + include/net/xfrm.h | 17 +++++++++++++++++ net/xfrm/xfrm_state.c | 4 ++++ 3 files changed, 22 insertions(+) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 40dff55fad25..f5bba23f2aae 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1040,6 +1040,7 @@ struct xfrmdev_ops { bool (*xdo_dev_offload_ok) (struct sk_buff *skb, struct xfrm_state *x); void (*xdo_dev_state_advance_esn) (struct xfrm_state *x); + void (*xdo_dev_state_update_curlft) (struct xfrm_state *x); int (*xdo_dev_policy_add) (struct xfrm_policy *x); void (*xdo_dev_policy_delete) (struct xfrm_policy *x); void (*xdo_dev_policy_free) (struct xfrm_policy *x); diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 00ce7a68bf3c..3982c43117d0 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -1571,6 +1571,23 @@ struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id, struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, unsigned short family); int xfrm_state_check_expire(struct xfrm_state *x); +#ifdef CONFIG_XFRM_OFFLOAD +static inline void xfrm_dev_state_update_curlft(struct xfrm_state *x) +{ + struct xfrm_dev_offload *xdo = &x->xso; + struct net_device *dev = xdo->dev; + + if (x->xso.type != XFRM_DEV_OFFLOAD_PACKET) + return; + + if (dev && dev->xfrmdev_ops && + dev->xfrmdev_ops->xdo_dev_state_update_curlft) + dev->xfrmdev_ops->xdo_dev_state_update_curlft(x); + +} +#else +static inline void xfrm_dev_state_update_curlft(struct xfrm_state *x) {} +#endif void xfrm_state_insert(struct xfrm_state *x); int xfrm_state_add(struct xfrm_state *x); int xfrm_state_update(struct xfrm_state *x); diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index cfc8c72b173d..5076f9d7a752 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -570,6 +570,8 @@ static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me) int err = 0; spin_lock(&x->lock); + xfrm_dev_state_update_curlft(x); + if (x->km.state == XFRM_STATE_DEAD) goto out; if (x->km.state == XFRM_STATE_EXPIRED) @@ -1821,6 +1823,8 @@ EXPORT_SYMBOL(xfrm_state_update); int xfrm_state_check_expire(struct xfrm_state *x) { + xfrm_dev_state_update_curlft(x); + if (!x->curlft.use_time) x->curlft.use_time = ktime_get_real_seconds(); From patchwork Fri Nov 18 06:35:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 13047753 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 3290CC43217 for ; Fri, 18 Nov 2022 06:36:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240819AbiKRGgM (ORCPT ); Fri, 18 Nov 2022 01:36:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48078 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235099AbiKRGgK (ORCPT ); Fri, 18 Nov 2022 01:36:10 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B3E919A260 for ; Thu, 17 Nov 2022 22:36:05 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 50E30622B0 for ; Fri, 18 Nov 2022 06:36:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 30DD3C433C1; Fri, 18 Nov 2022 06:36:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668753364; bh=KGjlDCPoCaU7NXrV0iVKv3hrvMdNrWVtthiirnmuEEo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GG1lXvIOvbT+HGKJqk3sD/vyaJZRFNfF/GbQDIhrUOkyUWvhSAxbxgOJORAKS9NS3 NobRybSdOwRsybsKyfzK2YyjPm1rpYIuSvAD91uQT3uTfKprzDolawfJX4kWsvxZ0m CipUrVj7ngA5fWX/+cVigHWfEqnxUsDha8/WAwfZNFw9Xd7KpZTqu28DTczk9xYCpp dSzt5caS9HIzf3HgTxN1aZTxbugELetDMr/wqSGoXl5daBwcVm1JVUsYzwInvVkU+m pd7xqFix7gwBK0MBoFgpmm3/Dudks0Bh9McWj7RAGWgASGwYXLMX+zBMl7aSUJFuq/ GlW6M68rTy7CA== From: Leon Romanovsky To: Steffen Klassert Cc: Leon Romanovsky , "David S. Miller" , Eric Dumazet , Herbert Xu , Jakub Kicinski , netdev@vger.kernel.org, Bharat Bhushan Subject: [PATCH xfrm-next v8 8/8] xfrm: document IPsec packet offload mode Date: Fri, 18 Nov 2022 08:35:28 +0200 Message-Id: X-Mailer: git-send-email 2.38.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Leon Romanovsky Extend XFRM device offload API description with newly added packet offload mode. Signed-off-by: Leon Romanovsky --- Documentation/networking/xfrm_device.rst | 62 ++++++++++++++++++++---- 1 file changed, 53 insertions(+), 9 deletions(-) diff --git a/Documentation/networking/xfrm_device.rst b/Documentation/networking/xfrm_device.rst index 01391dfd37d9..c43ace79e320 100644 --- a/Documentation/networking/xfrm_device.rst +++ b/Documentation/networking/xfrm_device.rst @@ -5,6 +5,7 @@ XFRM device - offloading the IPsec computations =============================================== Shannon Nelson +Leon Romanovsky Overview @@ -18,10 +19,21 @@ can radically increase throughput and decrease CPU utilization. The XFRM Device interface allows NIC drivers to offer to the stack access to the hardware offload. +Right now, there are two types of hardware offload that kernel supports. + * IPsec crypto offload: + * NIC performs encrypt/decrypt + * Kernel does everything else + * IPsec packet offload: + * NIC performs encrypt/decrypt + * NIC does encapsulation + * Kernel and NIC have SA and policy in-sync + * NIC handles the SA and policies states + * The Kernel talks to the keymanager + Userland access to the offload is typically through a system such as libreswan or KAME/raccoon, but the iproute2 'ip xfrm' command set can be handy when experimenting. An example command might look something -like this:: +like this for crypto offload: ip x s add proto esp dst 14.0.0.70 src 14.0.0.52 spi 0x07 mode transport \ reqid 0x07 replay-window 32 \ @@ -29,6 +41,17 @@ like this:: sel src 14.0.0.52/24 dst 14.0.0.70/24 proto tcp \ offload dev eth4 dir in +and for packet offload + + ip x s add proto esp dst 14.0.0.70 src 14.0.0.52 spi 0x07 mode transport \ + reqid 0x07 replay-window 32 \ + aead 'rfc4106(gcm(aes))' 0x44434241343332312423222114131211f4f3f2f1 128 \ + sel src 14.0.0.52/24 dst 14.0.0.70/24 proto tcp \ + offload packet dev eth4 dir in + + ip x p add src 14.0.0.70 dst 14.0.0.52 offload packet dev eth4 dir in + tmpl src 14.0.0.70 dst 14.0.0.52 proto esp reqid 10000 mode transport + Yes, that's ugly, but that's what shell scripts and/or libreswan are for. @@ -40,17 +63,24 @@ Callbacks to implement /* from include/linux/netdevice.h */ struct xfrmdev_ops { + /* Crypto and Packet offload callbacks */ int (*xdo_dev_state_add) (struct xfrm_state *x); void (*xdo_dev_state_delete) (struct xfrm_state *x); void (*xdo_dev_state_free) (struct xfrm_state *x); bool (*xdo_dev_offload_ok) (struct sk_buff *skb, struct xfrm_state *x); void (*xdo_dev_state_advance_esn) (struct xfrm_state *x); + + /* Solely packet offload callbacks */ + void (*xdo_dev_state_update_curlft) (struct xfrm_state *x); + int (*xdo_dev_policy_add) (struct xfrm_policy *x); + void (*xdo_dev_policy_delete) (struct xfrm_policy *x); + void (*xdo_dev_policy_free) (struct xfrm_policy *x); }; -The NIC driver offering ipsec offload will need to implement these -callbacks to make the offload available to the network stack's -XFRM subsystem. Additionally, the feature bits NETIF_F_HW_ESP and +The NIC driver offering ipsec offload will need to implement callbacks +relevant to supported offload to make the offload available to the network +stack's XFRM subsystem. Additionally, the feature bits NETIF_F_HW_ESP and NETIF_F_HW_ESP_TX_CSUM will signal the availability of the offload. @@ -79,7 +109,8 @@ and an indication of whether it is for Rx or Tx. The driver should =========== =================================== 0 success - -EOPNETSUPP offload not supported, try SW IPsec + -EOPNETSUPP offload not supported, try SW IPsec, + not applicable for packet offload mode other fail the request =========== =================================== @@ -96,6 +127,7 @@ will serviceable. This can check the packet information to be sure the offload can be supported (e.g. IPv4 or IPv6, no IPv4 options, etc) and return true of false to signify its support. +Crypto offload mode: When ready to send, the driver needs to inspect the Tx packet for the offload information, including the opaque context, and set up the packet send accordingly:: @@ -139,13 +171,25 @@ the stack in xfrm_input(). In ESN mode, xdo_dev_state_advance_esn() is called from xfrm_replay_advance_esn(). Driver will check packet seq number and update HW ESN state machine if needed. +Packet offload mode: +HW adds and deletes XFRM headers. So in RX path, XFRM stack is bypassed if HW +reported success. In TX path, the packet lefts kernel without extra header +and not encrypted, the HW is responsible to perform it. + When the SA is removed by the user, the driver's xdo_dev_state_delete() -is asked to disable the offload. Later, xdo_dev_state_free() is called -from a garbage collection routine after all reference counts to the state +and xdo_dev_policy_delete() are asked to disable the offload. Later, +xdo_dev_state_free() and xdo_dev_policy_free() are called from a garbage +collection routine after all reference counts to the state and policy have been removed and any remaining resources can be cleared for the offload state. How these are used by the driver will depend on specific hardware needs. As a netdev is set to DOWN the XFRM stack's netdev listener will call -xdo_dev_state_delete() and xdo_dev_state_free() on any remaining offloaded -states. +xdo_dev_state_delete(), xdo_dev_policy_delete(), xdo_dev_state_free() and +xdo_dev_policy_free() on any remaining offloaded states. + +Outcome of HW handling packets, the XFRM core can't count hard, soft limits. +The HW/driver are responsible to perform it and provide accurate data when +xdo_dev_state_update_curlft() is called. In case of one of these limits +occuried, the driver needs to call to xfrm_state_check_expire() to make sure +that XFRM performs rekeying sequence.