[Devel] [PATCH RFC 25/31] net: Make wireless netlink event generation handle multiple network namespaces

[Eric W. Biederman]

From: Eric W. Biederman <ebiederm at xmission.com> - unquoted

Signed-off-by: Eric W. Biederman <ebiederm at xmission.com>
---
 net/core/wireless.c |   15 ++++++++++-----
 1 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/net/core/wireless.c b/net/core/wireless.c
index 9036359..d534617 100644
--- a/net/core/wireless.c
+++ b/net/core/wireless.c
@@ -1934,8 +1934,13 @@ static void wireless_nlevent_process(unsigned long data)
 {
 	struct sk_buff *skb;
 
-	while ((skb = skb_dequeue(&wireless_nlevent_queue)))
-		rtnl_notify(skb, init_net(), 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
+	while ((skb = skb_dequeue(&wireless_nlevent_queue))) {
+		struct net_device *dev = skb->dev;
+		net_t net = dev->nd_net;
+		skb->dev = NULL;
+		rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
+		dev_put(dev);
+	}
 }
 
 static DECLARE_TASKLET(wireless_nlevent_tasklet, wireless_nlevent_process, 0);
@@ -1992,9 +1997,6 @@ static inline void rtmsg_iwinfo(struct net_device *	dev,
 	struct sk_buff *skb;
 	int size = NLMSG_GOODSIZE;
 
-	if (!net_eq(dev->nd_net, init_net()))
-		return;
-
 	skb = alloc_skb(size, GFP_ATOMIC);
 	if (!skb)
 		return;
@@ -2004,6 +2006,9 @@ static inline void rtmsg_iwinfo(struct net_device *	dev,
 		kfree_skb(skb);
 		return;
 	}
+	/* Remember the device until we are in process context */
+	dev_hold(dev);
+	skb->dev = dev;
 	NETLINK_CB(skb).dst_group = RTNLGRP_LINK;
 	skb_queue_tail(&wireless_nlevent_queue, skb);
 	tasklet_schedule(&wireless_nlevent_tasklet);
-- 
1.4.4.1.g278f

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