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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 28DACC47404 for ; Wed, 9 Oct 2019 09:19:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0A1CE206C0 for ; Wed, 9 Oct 2019 09:19:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730069AbfJIJTU (ORCPT ); Wed, 9 Oct 2019 05:19:20 -0400 Received: from host.76.145.23.62.rev.coltfrance.com ([62.23.145.76]:46323 "EHLO proxy.6wind.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727035AbfJIJTT (ORCPT ); Wed, 9 Oct 2019 05:19:19 -0400 Received: from bretzel.dev.6wind.com (unknown [10.16.0.19]) by proxy.6wind.com (Postfix) with ESMTPS id 17CC832A718; Wed, 9 Oct 2019 11:19:17 +0200 (CEST) Received: from dichtel by bretzel.dev.6wind.com with local (Exim 4.92) (envelope-from ) id 1iI87o-00017M-Oq; Wed, 09 Oct 2019 11:19:16 +0200 From: Nicolas Dichtel To: davem@davemloft.net Cc: gnault@redhat.com, netdev@vger.kernel.org, Nicolas Dichtel Subject: [PATCH net v2] netns: fix NLM_F_ECHO mechanism for RTM_NEWNSID Date: Wed, 9 Oct 2019 11:19:10 +0200 Message-Id: <20191009091910.4199-1-nicolas.dichtel@6wind.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191008231047.GB4779@linux.home> References: <20191008231047.GB4779@linux.home> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The flag NLM_F_ECHO aims to reply to the user the message notified to all listeners. It was not the case with the command RTM_NEWNSID, let's fix this. Fixes: 0c7aecd4bde4 ("netns: add rtnl cmd to add and get peer netns ids") Reported-by: Guillaume Nault Signed-off-by: Nicolas Dichtel --- v2: fix portid and seq number of the nl msg sent by the kernel net/core/net_namespace.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index a0e0d298c991..6d3e4821b02d 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -245,7 +245,8 @@ static int __peernet2id(struct net *net, struct net *peer) return __peernet2id_alloc(net, peer, &no); } -static void rtnl_net_notifyid(struct net *net, int cmd, int id); +static void rtnl_net_notifyid(struct net *net, int cmd, int id, u32 portid, + struct nlmsghdr *nlh); /* This function returns the id of a peer netns. If no id is assigned, one will * be allocated and returned. */ @@ -268,7 +269,7 @@ int peernet2id_alloc(struct net *net, struct net *peer) id = __peernet2id_alloc(net, peer, &alloc); spin_unlock_bh(&net->nsid_lock); if (alloc && id >= 0) - rtnl_net_notifyid(net, RTM_NEWNSID, id); + rtnl_net_notifyid(net, RTM_NEWNSID, id, 0, NULL); if (alive) put_net(peer); return id; @@ -532,7 +533,7 @@ static void unhash_nsid(struct net *net, struct net *last) idr_remove(&tmp->netns_ids, id); spin_unlock_bh(&tmp->nsid_lock); if (id >= 0) - rtnl_net_notifyid(tmp, RTM_DELNSID, id); + rtnl_net_notifyid(tmp, RTM_DELNSID, id, 0, NULL); if (tmp == last) break; } @@ -764,7 +765,8 @@ static int rtnl_net_newid(struct sk_buff *skb, struct nlmsghdr *nlh, err = alloc_netid(net, peer, nsid); spin_unlock_bh(&net->nsid_lock); if (err >= 0) { - rtnl_net_notifyid(net, RTM_NEWNSID, err); + rtnl_net_notifyid(net, RTM_NEWNSID, err, NETLINK_CB(skb).portid, + nlh); err = 0; } else if (err == -ENOSPC && nsid >= 0) { err = -EEXIST; @@ -1051,9 +1053,12 @@ static int rtnl_net_dumpid(struct sk_buff *skb, struct netlink_callback *cb) return err < 0 ? err : skb->len; } -static void rtnl_net_notifyid(struct net *net, int cmd, int id) +static void rtnl_net_notifyid(struct net *net, int cmd, int id, u32 portid, + struct nlmsghdr *nlh) { struct net_fill_args fillargs = { + .portid = portid, + .seq = nlh ? nlh->nlmsg_seq : 0, .cmd = cmd, .nsid = id, }; @@ -1068,7 +1073,7 @@ static void rtnl_net_notifyid(struct net *net, int cmd, int id) if (err < 0) goto err_out; - rtnl_notify(msg, net, 0, RTNLGRP_NSID, NULL, 0); + rtnl_notify(msg, net, portid, RTNLGRP_NSID, nlh, 0); return; err_out: -- 2.23.0