Patch "tipc: make dist queue pernet" has been added to the 4.4-stable tree

Patch "tipc: make dist queue pernet" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    tipc: make dist queue pernet

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     tipc-make-dist-queue-pernet.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 541726abe7daca64390c2ec34e6a203145f1686d Mon Sep 17 00:00:00 2001
From: Erik Hugne <erik.hugne@gmail.com>
Date: Thu, 7 Apr 2016 10:40:43 -0400
Subject: tipc: make dist queue pernet

From: Erik Hugne <erik.hugne@gmail.com>

commit 541726abe7daca64390c2ec34e6a203145f1686d upstream.

Nametable updates received from the network that cannot be applied
immediately are placed on a defer queue. This queue is global to the
TIPC module, which might cause problems when using TIPC in containers.
To prevent nametable updates from escaping into the wrong namespace,
we make the queue pernet instead.

Signed-off-by: Erik Hugne <erik.hugne@gmail.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/tipc/core.c       |    1 +
 net/tipc/core.h       |    3 +++
 net/tipc/name_distr.c |   16 +++++++---------
 3 files changed, 11 insertions(+), 9 deletions(-)

--- a/net/tipc/core.c
+++ b/net/tipc/core.c
@@ -69,6 +69,7 @@ static int __net_init tipc_init_net(stru
 	if (err)
 		goto out_nametbl;
 
+	INIT_LIST_HEAD(&tn->dist_queue);
 	err = tipc_topsrv_start(net);
 	if (err)
 		goto out_subscr;
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -103,6 +103,9 @@ struct tipc_net {
 	spinlock_t nametbl_lock;
 	struct name_table *nametbl;
 
+	/* Name dist queue */
+	struct list_head dist_queue;
+
 	/* Topology subscription server */
 	struct tipc_server *topsrv;
 	atomic_t subscription_count;
--- a/net/tipc/name_distr.c
+++ b/net/tipc/name_distr.c
@@ -40,11 +40,6 @@
 
 int sysctl_tipc_named_timeout __read_mostly = 2000;
 
-/**
- * struct tipc_dist_queue - queue holding deferred name table updates
- */
-static struct list_head tipc_dist_queue = LIST_HEAD_INIT(tipc_dist_queue);
-
 struct distr_queue_item {
 	struct distr_item i;
 	u32 dtype;
@@ -340,9 +335,11 @@ static bool tipc_update_nametbl(struct n
  * tipc_named_add_backlog - add a failed name table update to the backlog
  *
  */
-static void tipc_named_add_backlog(struct distr_item *i, u32 type, u32 node)
+static void tipc_named_add_backlog(struct net *net, struct distr_item *i,
+				   u32 type, u32 node)
 {
 	struct distr_queue_item *e;
+	struct tipc_net *tn = net_generic(net, tipc_net_id);
 	unsigned long now = get_jiffies_64();
 
 	e = kzalloc(sizeof(*e), GFP_ATOMIC);
@@ -352,7 +349,7 @@ static void tipc_named_add_backlog(struc
 	e->node = node;
 	e->expires = now + msecs_to_jiffies(sysctl_tipc_named_timeout);
 	memcpy(e, i, sizeof(*i));
-	list_add_tail(&e->next, &tipc_dist_queue);
+	list_add_tail(&e->next, &tn->dist_queue);
 }
 
 /**
@@ -362,10 +359,11 @@ static void tipc_named_add_backlog(struc
 void tipc_named_process_backlog(struct net *net)
 {
 	struct distr_queue_item *e, *tmp;
+	struct tipc_net *tn = net_generic(net, tipc_net_id);
 	char addr[16];
 	unsigned long now = get_jiffies_64();
 
-	list_for_each_entry_safe(e, tmp, &tipc_dist_queue, next) {
+	list_for_each_entry_safe(e, tmp, &tn->dist_queue, next) {
 		if (time_after(e->expires, now)) {
 			if (!tipc_update_nametbl(net, &e->i, e->node, e->dtype))
 				continue;
@@ -405,7 +403,7 @@ void tipc_named_rcv(struct net *net, str
 		node = msg_orignode(msg);
 		while (count--) {
 			if (!tipc_update_nametbl(net, item, node, mtype))
-				tipc_named_add_backlog(item, mtype, node);
+				tipc_named_add_backlog(net, item, mtype, node);
 			item++;
 		}
 		kfree_skb(skb);


Patches currently in stable-queue which might be from erik.hugne@gmail.com are

queue-4.4/tipc-make-dist-queue-pernet.patch