net: make sock diag per-namespace
Before this patch sock_diag works for init_net only and dumps
information about sockets from all namespaces.
This patch expands sock_diag for all name-spaces.
It creates a netlink kernel socket for each netns and filters
data during dumping.
v2: filter accoding with netns in all places
remove an unused variable.
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Pavel Emelyanov <xemul@parallels.com>
CC: Eric Dumazet <eric.dumazet@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Andrew Vagin <avagin@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/udp_diag.c b/net/ipv4/udp_diag.c
index a7f86a3..16d0960 100644
--- a/net/ipv4/udp_diag.c
+++ b/net/ipv4/udp_diag.c
@@ -34,15 +34,16 @@
int err = -EINVAL;
struct sock *sk;
struct sk_buff *rep;
+ struct net *net = sock_net(in_skb->sk);
if (req->sdiag_family == AF_INET)
- sk = __udp4_lib_lookup(&init_net,
+ sk = __udp4_lib_lookup(net,
req->id.idiag_src[0], req->id.idiag_sport,
req->id.idiag_dst[0], req->id.idiag_dport,
req->id.idiag_if, tbl);
#if IS_ENABLED(CONFIG_IPV6)
else if (req->sdiag_family == AF_INET6)
- sk = __udp6_lib_lookup(&init_net,
+ sk = __udp6_lib_lookup(net,
(struct in6_addr *)req->id.idiag_src,
req->id.idiag_sport,
(struct in6_addr *)req->id.idiag_dst,
@@ -75,7 +76,7 @@
kfree_skb(rep);
goto out;
}
- err = netlink_unicast(sock_diag_nlsk, rep, NETLINK_CB(in_skb).pid,
+ err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).pid,
MSG_DONTWAIT);
if (err > 0)
err = 0;
@@ -90,6 +91,7 @@
struct inet_diag_req_v2 *r, struct nlattr *bc)
{
int num, s_num, slot, s_slot;
+ struct net *net = sock_net(skb->sk);
s_slot = cb->args[0];
num = s_num = cb->args[1];
@@ -106,6 +108,8 @@
sk_nulls_for_each(sk, node, &hslot->head) {
struct inet_sock *inet = inet_sk(sk);
+ if (!net_eq(sock_net(sk), net))
+ continue;
if (num < s_num)
goto next;
if (!(r->idiag_states & (1 << sk->sk_state)))