From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752992AbaDRJcE (ORCPT ); Fri, 18 Apr 2014 05:32:04 -0400 Received: from ip4-83-240-18-248.cust.nbox.cz ([83.240.18.248]:45979 "EHLO ip4-83-240-18-248.cust.nbox.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752342AbaDRJWs (ORCPT ); Fri, 18 Apr 2014 05:22:48 -0400 From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Nicolas Dichtel , Thomas Graf , "David S. Miller" , Jiri Slaby Subject: [PATCH 3.12 51/72] ipmr: fix mfc notification flags Date: Fri, 18 Apr 2014 11:22:24 +0200 Message-Id: <6007e2c269182030d25500d3c2b80ee542291cf1.1397812482.git.jslaby@suse.cz> X-Mailer: git-send-email 1.9.2 In-Reply-To: <3389f243c528afc7c7300c83b8f296290cd3656d.1397812482.git.jslaby@suse.cz> References: <3389f243c528afc7c7300c83b8f296290cd3656d.1397812482.git.jslaby@suse.cz> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nicolas Dichtel 3.12-stable review patch. If anyone has any objections, please let me know. =============== [ Upstream commit 65886f439ab0fdc2dff20d1fa87afb98c6717472 ] Commit 8cd3ac9f9b7b ("ipmr: advertise new mfc entries via rtnl") reuses the function ipmr_fill_mroute() to notify mfc events. But this function was used only for dump and thus was always setting the flag NLM_F_MULTI, which is wrong in case of a single notification. Libraries like libnl will wait forever for NLMSG_DONE. CC: Thomas Graf Signed-off-by: Nicolas Dichtel Acked-by: Thomas Graf Signed-off-by: David S. Miller Signed-off-by: Jiri Slaby --- net/ipv4/ipmr.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index 1672409f5ba5..6fbf3393d842 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -2253,13 +2253,14 @@ int ipmr_get_route(struct net *net, struct sk_buff *skb, } static int ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, - u32 portid, u32 seq, struct mfc_cache *c, int cmd) + u32 portid, u32 seq, struct mfc_cache *c, int cmd, + int flags) { struct nlmsghdr *nlh; struct rtmsg *rtm; int err; - nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), NLM_F_MULTI); + nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags); if (nlh == NULL) return -EMSGSIZE; @@ -2327,7 +2328,7 @@ static void mroute_netlink_event(struct mr_table *mrt, struct mfc_cache *mfc, if (skb == NULL) goto errout; - err = ipmr_fill_mroute(mrt, skb, 0, 0, mfc, cmd); + err = ipmr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0); if (err < 0) goto errout; @@ -2366,7 +2367,8 @@ static int ipmr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) if (ipmr_fill_mroute(mrt, skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, - mfc, RTM_NEWROUTE) < 0) + mfc, RTM_NEWROUTE, + NLM_F_MULTI) < 0) goto done; next_entry: e++; @@ -2380,7 +2382,8 @@ next_entry: if (ipmr_fill_mroute(mrt, skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, - mfc, RTM_NEWROUTE) < 0) { + mfc, RTM_NEWROUTE, + NLM_F_MULTI) < 0) { spin_unlock_bh(&mfc_unres_lock); goto done; } -- 1.9.2