From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 8C1AA31F98D; Sat, 30 May 2026 18:11:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780164685; cv=none; b=ad8vjf9a7Rfwo9uFDgZuFy/lOPq8v35vjtedsjBAj6jHZKs8KhT/SGejKEamQqDs078Ssf684wMn5env2SZzwdNI65DzIlr359ZF9U2wza47cWFAe5nl99TDuq5/dH0eLUSFg6+QsRWYNIkruJ/W6kBmqwPhVWuXLE/wNY3PQI0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780164685; c=relaxed/simple; bh=SMLtlncMptMnn/OxJqBnN3LTfOL/9XdK6E23J6ZWHsY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LX2Y77FP6DRttIF63+Z+G1/eFAxZvBFRfSic6DspXjNl7Af1GNoRClmU7tE03b35pjUA2/NYuwXgJFk1oxvZ2cR39aqAMiLbeM56e4nOMZV19BrnPuE0H6Greo13G5bDG21M2S8hp4biSLyvFCOe67zr80fayX608jYTnriX1LI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=oeS4sYE3; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="oeS4sYE3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D38DA1F00893; Sat, 30 May 2026 18:11:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780164684; bh=JvmiFXO+qC5NllzCpXReGkYlIiC5aKCToca03DFczeA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=oeS4sYE3t86h25mhATfqCPZ0fgxLkltODs726x9lHhVULFkq83jCp8Bt/BBqJ5KVu MbtQy6xBgkcEY79O0UHnoxxeAYqtUhxJvII9VRNKAkBQ0U0tj4Tn0kWaABi6IkzdHD BPGmEtX3HTyNun69XX8KBNndoUheS9ss0NQQsTj0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Guillaume Nault , Beniamino Galvani , David Ahern , "David S. Miller" , Sasha Levin Subject: [PATCH 5.15 629/776] ipv4: rename and move ip_route_output_tunnel() Date: Sat, 30 May 2026 18:05:43 +0200 Message-ID: <20260530160256.227667586@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260530160240.228940103@linuxfoundation.org> References: <20260530160240.228940103@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Beniamino Galvani [ Upstream commit bf3fcbf7e7a08015d3b169bad6281b29d45c272d ] At the moment ip_route_output_tunnel() is used only by bareudp. Ideally, other UDP tunnel implementations should use it, but to do so the function needs to accept new parameters that are specific for UDP tunnels, such as the ports. Prepare for these changes by renaming the function to udp_tunnel_dst_lookup() and move it to file net/ipv4/udp_tunnel_core.c. Suggested-by: Guillaume Nault Signed-off-by: Beniamino Galvani Reviewed-by: David Ahern Signed-off-by: David S. Miller Stable-dep-of: aa6c6d9ee064 ("bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()") Signed-off-by: Sasha Levin --- drivers/net/bareudp.c | 8 +++---- include/net/route.h | 6 ----- include/net/udp_tunnel.h | 6 +++++ net/ipv4/route.c | 48 -------------------------------------- net/ipv4/udp_tunnel_core.c | 48 ++++++++++++++++++++++++++++++++++++++ 5 files changed, 58 insertions(+), 58 deletions(-) diff --git a/drivers/net/bareudp.c b/drivers/net/bareudp.c index bec8a2c8656c0..a2008cdcff707 100644 --- a/drivers/net/bareudp.c +++ b/drivers/net/bareudp.c @@ -318,8 +318,8 @@ static int bareudp_xmit_skb(struct sk_buff *skb, struct net_device *dev, if (!sock) return -ESHUTDOWN; - rt = ip_route_output_tunnel(skb, dev, bareudp->net, &saddr, info, - IPPROTO_UDP, use_cache); + rt = udp_tunnel_dst_lookup(skb, dev, bareudp->net, &saddr, info, + IPPROTO_UDP, use_cache); if (IS_ERR(rt)) return PTR_ERR(rt); @@ -498,8 +498,8 @@ static int bareudp_fill_metadata_dst(struct net_device *dev, struct rtable *rt; __be32 saddr; - rt = ip_route_output_tunnel(skb, dev, bareudp->net, &saddr, - info, IPPROTO_UDP, use_cache); + rt = udp_tunnel_dst_lookup(skb, dev, bareudp->net, &saddr, + info, IPPROTO_UDP, use_cache); if (IS_ERR(rt)) return PTR_ERR(rt); diff --git a/include/net/route.h b/include/net/route.h index 036e3ee3b856b..d771ceb7b337b 100644 --- a/include/net/route.h +++ b/include/net/route.h @@ -128,12 +128,6 @@ static inline struct rtable *__ip_route_output_key(struct net *net, struct rtable *ip_route_output_flow(struct net *, struct flowi4 *flp, const struct sock *sk); -struct rtable *ip_route_output_tunnel(struct sk_buff *skb, - struct net_device *dev, - struct net *net, __be32 *saddr, - const struct ip_tunnel_info *info, - u8 protocol, bool use_cache); - struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_orig); diff --git a/include/net/udp_tunnel.h b/include/net/udp_tunnel.h index b6af537abdc5a..81fdcecde24d6 100644 --- a/include/net/udp_tunnel.h +++ b/include/net/udp_tunnel.h @@ -161,6 +161,12 @@ int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, void udp_tunnel_sock_release(struct socket *sock); +struct rtable *udp_tunnel_dst_lookup(struct sk_buff *skb, + struct net_device *dev, + struct net *net, __be32 *saddr, + const struct ip_tunnel_info *info, + u8 protocol, bool use_cache); + struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family, __be16 flags, __be64 tunnel_id, int md_size); diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 8cddfeb65872f..4a7789ac0c101 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2926,54 +2926,6 @@ struct rtable *ip_route_output_flow(struct net *net, struct flowi4 *flp4, } EXPORT_SYMBOL_GPL(ip_route_output_flow); -struct rtable *ip_route_output_tunnel(struct sk_buff *skb, - struct net_device *dev, - struct net *net, __be32 *saddr, - const struct ip_tunnel_info *info, - u8 protocol, bool use_cache) -{ -#ifdef CONFIG_DST_CACHE - struct dst_cache *dst_cache; -#endif - struct rtable *rt = NULL; - struct flowi4 fl4; - __u8 tos; - -#ifdef CONFIG_DST_CACHE - dst_cache = (struct dst_cache *)&info->dst_cache; - if (use_cache) { - rt = dst_cache_get_ip4(dst_cache, saddr); - if (rt) - return rt; - } -#endif - memset(&fl4, 0, sizeof(fl4)); - fl4.flowi4_mark = skb->mark; - fl4.flowi4_proto = protocol; - fl4.daddr = info->key.u.ipv4.dst; - fl4.saddr = info->key.u.ipv4.src; - tos = info->key.tos; - fl4.flowi4_tos = RT_TOS(tos); - - rt = ip_route_output_key(net, &fl4); - if (IS_ERR(rt)) { - netdev_dbg(dev, "no route to %pI4\n", &fl4.daddr); - return ERR_PTR(-ENETUNREACH); - } - if (rt->dst.dev == dev) { /* is this necessary? */ - netdev_dbg(dev, "circular route to %pI4\n", &fl4.daddr); - ip_rt_put(rt); - return ERR_PTR(-ELOOP); - } -#ifdef CONFIG_DST_CACHE - if (use_cache) - dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr); -#endif - *saddr = fl4.saddr; - return rt; -} -EXPORT_SYMBOL_GPL(ip_route_output_tunnel); - /* called with rcu_read_lock held */ static int rt_fill_info(struct net *net, __be32 dst, __be32 src, struct rtable *rt, u32 table_id, struct flowi4 *fl4, diff --git a/net/ipv4/udp_tunnel_core.c b/net/ipv4/udp_tunnel_core.c index 1ff5b8e30bb92..4b1785a8cf112 100644 --- a/net/ipv4/udp_tunnel_core.c +++ b/net/ipv4/udp_tunnel_core.c @@ -207,4 +207,52 @@ struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family, } EXPORT_SYMBOL_GPL(udp_tun_rx_dst); +struct rtable *udp_tunnel_dst_lookup(struct sk_buff *skb, + struct net_device *dev, + struct net *net, __be32 *saddr, + const struct ip_tunnel_info *info, + u8 protocol, bool use_cache) +{ +#ifdef CONFIG_DST_CACHE + struct dst_cache *dst_cache; +#endif + struct rtable *rt = NULL; + struct flowi4 fl4; + __u8 tos; + +#ifdef CONFIG_DST_CACHE + dst_cache = (struct dst_cache *)&info->dst_cache; + if (use_cache) { + rt = dst_cache_get_ip4(dst_cache, saddr); + if (rt) + return rt; + } +#endif + memset(&fl4, 0, sizeof(fl4)); + fl4.flowi4_mark = skb->mark; + fl4.flowi4_proto = protocol; + fl4.daddr = info->key.u.ipv4.dst; + fl4.saddr = info->key.u.ipv4.src; + tos = info->key.tos; + fl4.flowi4_tos = RT_TOS(tos); + + rt = ip_route_output_key(net, &fl4); + if (IS_ERR(rt)) { + netdev_dbg(dev, "no route to %pI4\n", &fl4.daddr); + return ERR_PTR(-ENETUNREACH); + } + if (rt->dst.dev == dev) { /* is this necessary? */ + netdev_dbg(dev, "circular route to %pI4\n", &fl4.daddr); + ip_rt_put(rt); + return ERR_PTR(-ELOOP); + } +#ifdef CONFIG_DST_CACHE + if (use_cache) + dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr); +#endif + *saddr = fl4.saddr; + return rt; +} +EXPORT_SYMBOL_GPL(udp_tunnel_dst_lookup); + MODULE_LICENSE("GPL"); -- 2.53.0