From d815f4efbb2a04e57632fc4daa6ebaf5fca52123 Mon Sep 17 00:00:00 2001 From: KUWAZAWA Takuya Date: Sun, 15 Oct 2017 20:54:10 +0900 Subject: [PATCH] netfilter: ipvs: Fix inappropriate output of procfs [ Upstream commit c5504f724c86ee925e7ffb80aa342cfd57959b13 ] Information about ipvs in different network namespace can be seen via procfs. How to reproduce: # ip netns add ns01 # ip netns add ns02 # ip netns exec ns01 ip a add dev lo 127.0.0.1/8 # ip netns exec ns02 ip a add dev lo 127.0.0.1/8 # ip netns exec ns01 ipvsadm -A -t 10.1.1.1:80 # ip netns exec ns02 ipvsadm -A -t 10.1.1.2:80 The ipvsadm displays information about its own network namespace only. # ip netns exec ns01 ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 10.1.1.1:80 wlc # ip netns exec ns02 ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 10.1.1.2:80 wlc But I can see information about other network namespace via procfs. # ip netns exec ns01 cat /proc/net/ip_vs IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 0A010101:0050 wlc TCP 0A010102:0050 wlc # ip netns exec ns02 cat /proc/net/ip_vs IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 0A010102:0050 wlc Signed-off-by: KUWAZAWA Takuya Acked-by: Julian Anastasov Signed-off-by: Pablo Neira Ayuso Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- net/netfilter/ipvs/ip_vs_ctl.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c index 4f940d7..b3245f9 100644 --- a/net/netfilter/ipvs/ip_vs_ctl.c +++ b/net/netfilter/ipvs/ip_vs_ctl.c @@ -2034,12 +2034,16 @@ static int ip_vs_info_seq_show(struct seq_file *seq, void *v) seq_puts(seq, " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n"); } else { + struct net *net = seq_file_net(seq); + struct netns_ipvs *ipvs = net_ipvs(net); const struct ip_vs_service *svc = v; const struct ip_vs_iter *iter = seq->private; const struct ip_vs_dest *dest; struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler); char *sched_name = sched ? sched->name : "none"; + if (svc->ipvs != ipvs) + return 0; if (iter->table == ip_vs_svc_table) { #ifdef CONFIG_IP_VS_IPV6 if (svc->af == AF_INET6) -- 2.7.4