From nobody Wed Nov 27 14:46:08 2024 Received: from out30-118.freemail.mail.aliyun.com (out30-118.freemail.mail.aliyun.com [115.124.30.118]) (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 E4A1C1BC094; Thu, 10 Oct 2024 09:03:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.118 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728551041; cv=none; b=ua3bUbhX2TnwGB71bo06hjs18gdo7bJTObVhKBfFm6tqWQU3+Tv+jKmLr1NTXu0rBKTsVshfnLis0VBKsl43zIhmiyuGQHkkIu3kLntmYO9LojK55KeC/T4C/KNjO9KuZXtIsKLspd5Qw1epKiAbPPMZRHYGJxGPoZXT05+Egt4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728551041; c=relaxed/simple; bh=c3BXMK3g+le1atfINNKMH4gsxuBQtOs2DgEKCDCThdg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=BD0hhjm4FgDWIHN1vf2s3lI/byfoGEtYKZe6J1HO+2KFw+cFJXB8VUhyHnUiQAczhi6guhX+5Kv/zmuRWmVWq9cH58/in7COv8aafBQQp9MQ1yOAXL0LQIo2iIcfkxERVcVXLn788BFrrYTiPvCz1UP2cT4TW0v/Gl6S4xafoYI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=IfB9C7I+; arc=none smtp.client-ip=115.124.30.118 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="IfB9C7I+" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1728551035; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=l3k46guHkhuRMtgQnenhY9XWz/eCeKuU2wfyKGxU1ks=; b=IfB9C7I+ZD/chkLYYEJhm8CMpa9y3DsWVu8x5nsEb3ZZevb46C6jmFn/msAd5AaPiZObqGqwdKhHGCc6sFj1UY7IWAH2Pa4o0h8B/fQj+ZZcdAlW3X33GUFcZL71r6z/Z9Fif8IryAXmnZyeVdIqlUhdMy7fH40q/KoLVQ4FZmQ= Received: from localhost(mailfrom:lulie@linux.alibaba.com fp:SMTPD_---0WGlokzT_1728551033 cluster:ay36) by smtp.aliyun-inc.com; Thu, 10 Oct 2024 17:03:54 +0800 From: Philo Lu To: netdev@vger.kernel.org Cc: willemdebruijn.kernel@gmail.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, dsahern@kernel.org, antony.antony@secunet.com, steffen.klassert@secunet.com, linux-kernel@vger.kernel.org, dust.li@linux.alibaba.com, jakub@cloudflare.com, fred.cc@alibaba-inc.com, yubing.qiuyubing@alibaba-inc.com Subject: [PATCH v3 net-next 2/3] net/udp: Add 4-tuple hash list basis Date: Thu, 10 Oct 2024 17:03:50 +0800 Message-Id: <20241010090351.79698-3-lulie@linux.alibaba.com> X-Mailer: git-send-email 2.32.0.3.g01195cf9f In-Reply-To: <20241010090351.79698-1-lulie@linux.alibaba.com> References: <20241010090351.79698-1-lulie@linux.alibaba.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a new hash list, hash4, in udp table. It will be used to implement 4-tuple hash for connected udp sockets. This patch adds the hlist to table, and implements helpers and the initialization. 4-tuple hash is implemented in the following patch. Signed-off-by: Philo Lu Signed-off-by: Cambda Zhu Signed-off-by: Fred Chen Signed-off-by: Yubing Qiu --- include/linux/udp.h | 7 +++++++ include/net/udp.h | 16 +++++++++++++++- net/ipv4/udp.c | 17 +++++++++++++---- 3 files changed, 35 insertions(+), 5 deletions(-) diff --git a/include/linux/udp.h b/include/linux/udp.h index 3eb3f2b9a2a0..c04808360a05 100644 --- a/include/linux/udp.h +++ b/include/linux/udp.h @@ -56,6 +56,10 @@ struct udp_sock { int pending; /* Any pending frames ? */ __u8 encap_type; /* Is this an Encapsulation socket? */ =20 + /* For UDP 4-tuple hash */ + __u16 udp_lrpa_hash; + struct hlist_node udp_lrpa_node; + /* * Following member retains the information to create a UDP header * when the socket is uncorked. @@ -206,6 +210,9 @@ static inline void udp_allow_gso(struct sock *sk) #define udp_portaddr_for_each_entry_rcu(__sk, list) \ hlist_for_each_entry_rcu(__sk, list, __sk_common.skc_portaddr_node) =20 +#define udp_lrpa_for_each_entry_rcu(__up, list) \ + hlist_for_each_entry_rcu(__up, list, udp_lrpa_node) + #define IS_UDPLITE(__sk) (__sk->sk_protocol =3D=3D IPPROTO_UDPLITE) =20 #endif /* _LINUX_UDP_H */ diff --git a/include/net/udp.h b/include/net/udp.h index 595364729138..80f9622d0db3 100644 --- a/include/net/udp.h +++ b/include/net/udp.h @@ -50,7 +50,7 @@ struct udp_skb_cb { #define UDP_SKB_CB(__skb) ((struct udp_skb_cb *)((__skb)->cb)) =20 /** - * struct udp_hslot - UDP hash slot used by udp_table.hash + * struct udp_hslot - UDP hash slot used by udp_table.hash/hash4 * * @head: head of list of sockets * @count: number of sockets in 'head' list @@ -79,12 +79,15 @@ struct udp_hslot_main { * * @hash: hash table, sockets are hashed on (local port) * @hash2: hash table, sockets are hashed on (local port, local address) + * @hash4: hash table, connected sockets are hashed on + * (local port, local address, remote port, remote address) * @mask: number of slots in hash tables, minus 1 * @log: log2(number of slots in hash table) */ struct udp_table { struct udp_hslot *hash; struct udp_hslot_main *hash2; + struct udp_hslot *hash4; unsigned int mask; unsigned int log; }; @@ -113,6 +116,17 @@ static inline struct udp_hslot *udp_hashslot2(struct u= dp_table *table, return &table->hash2[hash & table->mask].hslot; } =20 +static inline struct udp_hslot *udp_hashslot4(struct udp_table *table, + unsigned int hash) +{ + return &table->hash4[hash & table->mask]; +} + +static inline bool udp_hashed4(const struct sock *sk) +{ + return !hlist_unhashed(&udp_sk(sk)->udp_lrpa_node); +} + extern struct proto udp_prot; =20 extern atomic_long_t udp_memory_allocated; diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 36d617235acd..9f4cc6f778ce 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -3425,7 +3425,7 @@ void __init udp_table_init(struct udp_table *table, c= onst char *name) { unsigned int i, slot_size; =20 - slot_size =3D sizeof(struct udp_hslot) + sizeof(struct udp_hslot_main); + slot_size =3D 2 * sizeof(struct udp_hslot) + sizeof(struct udp_hslot_main= ); table->hash =3D alloc_large_system_hash(name, slot_size, uhash_entries, @@ -3437,6 +3437,7 @@ void __init udp_table_init(struct udp_table *table, c= onst char *name) UDP_HTABLE_SIZE_MAX); =20 table->hash2 =3D (void *)(table->hash + (table->mask + 1)); + table->hash4 =3D (void *)(table->hash2 + (table->mask + 1)); for (i =3D 0; i <=3D table->mask; i++) { INIT_HLIST_HEAD(&table->hash[i].head); table->hash[i].count =3D 0; @@ -3448,6 +3449,11 @@ void __init udp_table_init(struct udp_table *table, = const char *name) spin_lock_init(&table->hash2[i].hslot.lock); table->hash2[i].hash4_cnt =3D 0; } + for (i =3D 0; i <=3D table->mask; i++) { + INIT_HLIST_HEAD(&table->hash4[i].head); + table->hash4[i].count =3D 0; + spin_lock_init(&table->hash4[i].lock); + } } =20 u32 udp_flow_hashrnd(void) @@ -3480,16 +3486,15 @@ static struct udp_table __net_init *udp_pernet_tabl= e_alloc(unsigned int hash_ent if (!udptable) goto out; =20 - slot_size =3D sizeof(struct udp_hslot) + sizeof(struct udp_hslot_main); + slot_size =3D 2 * sizeof(struct udp_hslot) + sizeof(struct udp_hslot_main= ); udptable->hash =3D vmalloc_huge(hash_entries * slot_size, GFP_KERNEL_ACCOUNT); if (!udptable->hash) goto free_table; =20 udptable->hash2 =3D UDP_HSLOT_MAIN(udptable->hash + hash_entries); - udptable->mask =3D hash_entries - 1; + udptable->hash4 =3D (struct udp_hslot *)(udptable->hash2 + hash_entries); udptable->log =3D ilog2(hash_entries); - for (i =3D 0; i < hash_entries; i++) { INIT_HLIST_HEAD(&udptable->hash[i].head); udptable->hash[i].count =3D 0; @@ -3499,6 +3504,10 @@ static struct udp_table __net_init *udp_pernet_table= _alloc(unsigned int hash_ent udptable->hash2[i].hslot.count =3D 0; spin_lock_init(&udptable->hash2[i].hslot.lock); udptable->hash2[i].hash4_cnt =3D 0; + + INIT_HLIST_HEAD(&udptable->hash4[i].head); + udptable->hash4[i].count =3D 0; + spin_lock_init(&udptable->hash4[i].lock); } =20 return udptable; --=20 2.32.0.3.g01195cf9f