From mboxrd@z Thu Jan 1 00:00:00 1970 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 1FC0CC4332F for ; Mon, 14 Nov 2022 21:59:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237306AbiKNV7a (ORCPT ); Mon, 14 Nov 2022 16:59:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44346 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235813AbiKNV73 (ORCPT ); Mon, 14 Nov 2022 16:59:29 -0500 Received: from smtp-fw-6001.amazon.com (smtp-fw-6001.amazon.com [52.95.48.154]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 02B432AD5 for ; Mon, 14 Nov 2022 13:59:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1668463168; x=1699999168; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=6U40a0ZcOlL4ErV6ZnGSie/PacpI0Am6I5DZhol5pHg=; b=HacrGZ5gqERYMdOX1f6NM5F4UwH7BZwU+TP0yfbmckLmxsEy0pw/IHir Vz6dhG8TDHN/BGXEPji3ERniPX67gYonRiBkx5Ism9NQ9CdlnpYU1K2OO AMFWm9ihwPPs6EiXilW2g0QT2cLmtkYER3pLGRzNvbY40yJmfUrjXghDH A=; Received: from iad12-co-svc-p1-lb1-vlan2.amazon.com (HELO email-inbound-relay-pdx-2c-m6i4x-d2040ec1.us-west-2.amazon.com) ([10.43.8.2]) by smtp-border-fw-6001.iad6.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Nov 2022 21:59:25 +0000 Received: from EX13MTAUWB001.ant.amazon.com (pdx1-ws-svc-p6-lb9-vlan2.pdx.amazon.com [10.236.137.194]) by email-inbound-relay-pdx-2c-m6i4x-d2040ec1.us-west-2.amazon.com (Postfix) with ESMTPS id 4F0F241841; Mon, 14 Nov 2022 21:59:24 +0000 (UTC) Received: from EX19D004ANA001.ant.amazon.com (10.37.240.138) by EX13MTAUWB001.ant.amazon.com (10.43.161.249) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Mon, 14 Nov 2022 21:59:23 +0000 Received: from 88665a182662.ant.amazon.com (10.43.162.178) by EX19D004ANA001.ant.amazon.com (10.37.240.138) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1118.20; Mon, 14 Nov 2022 21:59:21 +0000 From: Kuniyuki Iwashima To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni CC: Kuniyuki Iwashima , Kuniyuki Iwashima , Subject: [PATCH v4 net-next 3/5] udp: Set NULL to udp_seq_afinfo.udp_table. Date: Mon, 14 Nov 2022 13:57:55 -0800 Message-ID: <20221114215757.37455-4-kuniyu@amazon.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221114215757.37455-1-kuniyu@amazon.com> References: <20221114215757.37455-1-kuniyu@amazon.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.43.162.178] X-ClientProxiedBy: EX13D32UWB002.ant.amazon.com (10.43.161.139) To EX19D004ANA001.ant.amazon.com (10.37.240.138) Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org We will soon introduce an optional per-netns hash table for UDP. This means we cannot use the global udp_seq_afinfo.udp_table to fetch a UDP hash table. Instead, set NULL to udp_seq_afinfo.udp_table for UDP and get a proper table from net->ipv4.udp_table. Note that we still need udp_seq_afinfo.udp_table for UDP LITE. Signed-off-by: Kuniyuki Iwashima --- net/ipv4/udp.c | 32 ++++++++++++++++++++++++-------- net/ipv6/udp.c | 2 +- 2 files changed, 25 insertions(+), 9 deletions(-) diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 6206c27a1659..a1a15eb76304 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -2980,11 +2980,18 @@ EXPORT_SYMBOL(udp_prot); /* ------------------------------------------------------------------------ */ #ifdef CONFIG_PROC_FS +static struct udp_table *udp_get_table_afinfo(struct udp_seq_afinfo *afinfo, + struct net *net) +{ + return afinfo->udp_table ? : net->ipv4.udp_table; +} + static struct sock *udp_get_first(struct seq_file *seq, int start) { struct udp_iter_state *state = seq->private; struct net *net = seq_file_net(seq); struct udp_seq_afinfo *afinfo; + struct udp_table *udptable; struct sock *sk; if (state->bpf_seq_afinfo) @@ -2992,9 +2999,11 @@ static struct sock *udp_get_first(struct seq_file *seq, int start) else afinfo = pde_data(file_inode(seq->file)); - for (state->bucket = start; state->bucket <= afinfo->udp_table->mask; + udptable = udp_get_table_afinfo(afinfo, net); + + for (state->bucket = start; state->bucket <= udptable->mask; ++state->bucket) { - struct udp_hslot *hslot = &afinfo->udp_table->hash[state->bucket]; + struct udp_hslot *hslot = &udptable->hash[state->bucket]; if (hlist_empty(&hslot->head)) continue; @@ -3019,6 +3028,7 @@ static struct sock *udp_get_next(struct seq_file *seq, struct sock *sk) struct udp_iter_state *state = seq->private; struct net *net = seq_file_net(seq); struct udp_seq_afinfo *afinfo; + struct udp_table *udptable; if (state->bpf_seq_afinfo) afinfo = state->bpf_seq_afinfo; @@ -3032,8 +3042,11 @@ static struct sock *udp_get_next(struct seq_file *seq, struct sock *sk) sk->sk_family != afinfo->family))); if (!sk) { - if (state->bucket <= afinfo->udp_table->mask) - spin_unlock_bh(&afinfo->udp_table->hash[state->bucket].lock); + udptable = udp_get_table_afinfo(afinfo, net); + + if (state->bucket <= udptable->mask) + spin_unlock_bh(&udptable->hash[state->bucket].lock); + return udp_get_first(seq, state->bucket + 1); } return sk; @@ -3076,14 +3089,17 @@ void udp_seq_stop(struct seq_file *seq, void *v) { struct udp_iter_state *state = seq->private; struct udp_seq_afinfo *afinfo; + struct udp_table *udptable; if (state->bpf_seq_afinfo) afinfo = state->bpf_seq_afinfo; else afinfo = pde_data(file_inode(seq->file)); - if (state->bucket <= afinfo->udp_table->mask) - spin_unlock_bh(&afinfo->udp_table->hash[state->bucket].lock); + udptable = udp_get_table_afinfo(afinfo, seq_file_net(seq)); + + if (state->bucket <= udptable->mask) + spin_unlock_bh(&udptable->hash[state->bucket].lock); } EXPORT_SYMBOL(udp_seq_stop); @@ -3196,7 +3212,7 @@ EXPORT_SYMBOL(udp_seq_ops); static struct udp_seq_afinfo udp4_seq_afinfo = { .family = AF_INET, - .udp_table = &udp_table, + .udp_table = NULL, }; static int __net_init udp4_proc_init_net(struct net *net) @@ -3316,7 +3332,7 @@ static int bpf_iter_init_udp(void *priv_data, struct bpf_iter_aux_info *aux) return -ENOMEM; afinfo->family = AF_UNSPEC; - afinfo->udp_table = &udp_table; + afinfo->udp_table = NULL; st->bpf_seq_afinfo = afinfo; ret = bpf_iter_init_seq_net(priv_data, aux); if (ret) diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index bbd6dc398f3b..c3dee1f8d3bd 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -1724,7 +1724,7 @@ EXPORT_SYMBOL(udp6_seq_ops); static struct udp_seq_afinfo udp6_seq_afinfo = { .family = AF_INET6, - .udp_table = &udp_table, + .udp_table = NULL, }; int __net_init udp6_proc_init(struct net *net) -- 2.30.2