From patchwork Wed Feb 19 13:50:57 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 13982261 X-Patchwork-Delegate: kuba@kernel.org Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 84D7F1DE89D for ; Wed, 19 Feb 2025 13:51:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739973081; cv=none; b=l0FKYYi9Au1xrJJzDnHVJUdxx6qd+BB6oPNEJHw2jd5k5IXBswuejSvM4UZcM/PYkXBqK+EhHMqpuJmkw33yC5LP7UjF7P3q6NufkA36B6xayIAYpPKp1NUzGll1HswG4eFwA1xNoodAjy8hFaQfkvca99k2sum6ChnDy3Y/Ujc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739973081; c=relaxed/simple; bh=8Z/3Q3fwr5V298lSrJ/NVQvOdiKdH/kG4BkiU8Hj160=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=B6H6kWTKsY3KO1eSdT8Fk6tarKQnYG/XS9FWXcMIUJMtqmBENVOv+KQbQiTwOdivf8EjKbm31WIFeMfuzmUK0/RFkBjsSNcYe9Cej46aA3RmWUczBeHXwIy6W8ehwcyr63OlSHSRIFUSZnlDqKkjcHK1ikM8wmQS4Q49m0r0Q2I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ad+Hio/A; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ad+Hio/A" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7F05AC19422; Wed, 19 Feb 2025 13:51:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1739973080; bh=8Z/3Q3fwr5V298lSrJ/NVQvOdiKdH/kG4BkiU8Hj160=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ad+Hio/AzZdJCePuqJq3+nfGF1h0k++eOQ7okEKoAYbpSl0j5AKcBqJ47aI0ZSyJY NYO0izA7oFXaBcX45ypsLrQtU5FMsQjCPii/DWO/EpDC580Y8rhsiOU0iUZqQ8pYjz daenCH8FEC2DZpiqbBY+iTrtuqYzfdzfbrx88ytwbBySidS5gIaiHOFImlOCZzWmGS KJCWfv5nSieBlhRFFBwiuucyQ6A8EA6c1Fw/1HaKrAKBRLSkTQ5YR7XUd6aewl8Glu jDHPJHxiZU47MHvsCfnMThGUxAL4y22TIUH0hUfIPNdqu00Fg6+k+sAq3vphfLuXJ8 vkiePspUyAt6w== From: Leon Romanovsky To: Steffen Klassert Cc: Leon Romanovsky , "David S. Miller" , Eric Dumazet , Herbert Xu , Jakub Kicinski , netdev@vger.kernel.org, Paolo Abeni Subject: [PATCH ipsec-next v1 1/5] xfrm: delay initialization of offload path till its actually requested Date: Wed, 19 Feb 2025 15:50:57 +0200 Message-ID: <3a5407283334ffad47a7079f86efdf9f08a0cda7.1739972570.git.leon@kernel.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org From: Leon Romanovsky XFRM offload path is probed even if offload isn't needed at all. Let's make sure that x->type_offload pointer stays NULL for such path to reduce ambiguity. Fixes: 9d389d7f84bb ("xfrm: Add a xfrm type offload.") Signed-off-by: Leon Romanovsky --- include/net/xfrm.h | 11 ++++++++++- net/xfrm/xfrm_device.c | 13 ++++++++----- net/xfrm/xfrm_state.c | 32 ++++++++++++++------------------ net/xfrm/xfrm_user.c | 2 +- 4 files changed, 33 insertions(+), 25 deletions(-) diff --git a/include/net/xfrm.h b/include/net/xfrm.h index ed4b83696c77..e1eed5d47d07 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -464,6 +464,15 @@ struct xfrm_type_offload { int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family); void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family); +void xfrm_set_type_offload(struct xfrm_state *x); +static inline void xfrm_unset_type_offload(struct xfrm_state *x) +{ + if (!x->type_offload) + return; + + module_put(x->type_offload->owner); + x->type_offload = NULL; +} /** * struct xfrm_mode_cbs - XFRM mode callbacks @@ -1760,7 +1769,7 @@ void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); int xfrm_init_replay(struct xfrm_state *x, struct netlink_ext_ack *extack); u32 xfrm_state_mtu(struct xfrm_state *x, int mtu); -int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload, +int __xfrm_init_state(struct xfrm_state *x, bool init_replay, struct netlink_ext_ack *extack); int xfrm_init_state(struct xfrm_state *x); int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c index d1fa94e52cea..97c8030cc417 100644 --- a/net/xfrm/xfrm_device.c +++ b/net/xfrm/xfrm_device.c @@ -244,11 +244,6 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, xfrm_address_t *daddr; bool is_packet_offload; - if (!x->type_offload) { - NL_SET_ERR_MSG(extack, "Type doesn't support offload"); - return -EINVAL; - } - if (xuo->flags & ~(XFRM_OFFLOAD_IPV6 | XFRM_OFFLOAD_INBOUND | XFRM_OFFLOAD_PACKET)) { NL_SET_ERR_MSG(extack, "Unrecognized flags in offload request"); @@ -310,6 +305,13 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, return -EINVAL; } + xfrm_set_type_offload(x); + if (!x->type_offload) { + NL_SET_ERR_MSG(extack, "Type doesn't support offload"); + dev_put(dev); + return -EINVAL; + } + xso->dev = dev; netdev_tracker_alloc(dev, &xso->dev_tracker, GFP_ATOMIC); xso->real_dev = dev; @@ -332,6 +334,7 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, netdev_put(dev, &xso->dev_tracker); xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED; + xfrm_unset_type_offload(x); /* 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. diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index ad2202fa82f3..69af5964c886 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -424,18 +424,18 @@ void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, } EXPORT_SYMBOL(xfrm_unregister_type_offload); -static const struct xfrm_type_offload * -xfrm_get_type_offload(u8 proto, unsigned short family, bool try_load) +void xfrm_set_type_offload(struct xfrm_state *x) { const struct xfrm_type_offload *type = NULL; struct xfrm_state_afinfo *afinfo; + bool try_load = true; retry: - afinfo = xfrm_state_get_afinfo(family); + afinfo = xfrm_state_get_afinfo(x->props.family); if (unlikely(afinfo == NULL)) - return NULL; + goto out; - switch (proto) { + switch (x->id.proto) { case IPPROTO_ESP: type = afinfo->type_offload_esp; break; @@ -449,18 +449,16 @@ xfrm_get_type_offload(u8 proto, unsigned short family, bool try_load) rcu_read_unlock(); if (!type && try_load) { - request_module("xfrm-offload-%d-%d", family, proto); + request_module("xfrm-offload-%d-%d", x->props.family, + x->id.proto); try_load = false; goto retry; } - return type; -} - -static void xfrm_put_type_offload(const struct xfrm_type_offload *type) -{ - module_put(type->owner); +out: + x->type_offload = type; } +EXPORT_SYMBOL(xfrm_set_type_offload); static const struct xfrm_mode xfrm4_mode_map[XFRM_MODE_MAX] = { [XFRM_MODE_BEET] = { @@ -609,8 +607,6 @@ static void ___xfrm_state_destroy(struct xfrm_state *x) kfree(x->coaddr); kfree(x->replay_esn); kfree(x->preplay_esn); - if (x->type_offload) - xfrm_put_type_offload(x->type_offload); if (x->type) { x->type->destructor(x); xfrm_put_type(x->type); @@ -784,6 +780,8 @@ void xfrm_dev_state_free(struct xfrm_state *x) struct xfrm_dev_offload *xso = &x->xso; struct net_device *dev = READ_ONCE(xso->dev); + xfrm_unset_type_offload(x); + if (dev && dev->xfrmdev_ops) { spin_lock_bh(&xfrm_state_dev_gc_lock); if (!hlist_unhashed(&x->dev_gclist)) @@ -3122,7 +3120,7 @@ u32 xfrm_state_mtu(struct xfrm_state *x, int mtu) } EXPORT_SYMBOL_GPL(xfrm_state_mtu); -int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload, +int __xfrm_init_state(struct xfrm_state *x, bool init_replay, struct netlink_ext_ack *extack) { const struct xfrm_mode *inner_mode; @@ -3178,8 +3176,6 @@ int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload, goto error; } - x->type_offload = xfrm_get_type_offload(x->id.proto, family, offload); - err = x->type->init_state(x, extack); if (err) goto error; @@ -3229,7 +3225,7 @@ int xfrm_init_state(struct xfrm_state *x) { int err; - err = __xfrm_init_state(x, true, false, NULL); + err = __xfrm_init_state(x, true, NULL); if (!err) x->km.state = XFRM_STATE_VALID; diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 08c6d6f0179f..82a768500999 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -907,7 +907,7 @@ static struct xfrm_state *xfrm_state_construct(struct net *net, goto error; } - err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV], extack); + err = __xfrm_init_state(x, false, extack); if (err) goto error;