netdev - Re: [PATCHv3 net-next] xfrm: Namespacify xfrm_policy_sk

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Date:	Wed, 18 Dec 2013 19:44:10 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Fan Du <fan.du@...driver.com>
Cc:	王聪 <xiyou.wangcong@...il.com>,
	steffen.klassert@...unet.com, davem@...emloft.net,
	netdev@...r.kernel.org
Subject: Re: [PATCHv3 net-next] xfrm: Namespacify xfrm_policy_sk_bundles

On Thu, 2013-12-19 at 11:17 +0800, Fan Du wrote:
> 

> diff --git a/include/net/netns/xfrm.h b/include/net/netns/xfrm.h
> index 1006a26..22f4f90 100644
> --- a/include/net/netns/xfrm.h
> +++ b/include/net/netns/xfrm.h
> @@ -58,9 +58,9 @@ struct netns_xfrm {
>   	struct dst_ops		xfrm6_dst_ops;
>   #endif
>   	spinlock_t xfrm_state_lock;
> -	spinlock_t xfrm_policy_sk_bundle_lock;
>   	rwlock_t xfrm_policy_lock;
>   	struct mutex xfrm_cfg_mutex;
> +	struct llist_head xp_sk_bundles_list;
>   };
> 
>   #endif
> diff --git a/include/net/xfrm.h b/include/net/xfrm.h
> index 59f5d0a..05296ab 100644
> --- a/include/net/xfrm.h
> +++ b/include/net/xfrm.h
> @@ -957,6 +957,7 @@ struct xfrm_dst {
>   	u32 child_mtu_cached;
>   	u32 route_cookie;
>   	u32 path_cookie;
> +	struct llist_node       xdst_llist;
>   };
> 

Hmm... Thats not very nice.

Please reuse the storage adding a llist_node in the union ?

diff --git a/include/net/dst.h b/include/net/dst.h
index 44995c13e941..3f604f47cc58 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -14,6 +14,7 @@
 #include <linux/rcupdate.h>
 #include <linux/bug.h>
 #include <linux/jiffies.h>
+#include <linux/llist.h>
 #include <net/neighbour.h>
 #include <asm/processor.h>
 
@@ -103,6 +104,7 @@ struct dst_entry {
 		struct rtable __rcu	*rt_next;
 		struct rt6_info		*rt6_next;
 		struct dn_route __rcu	*dn_next;
+		struct llist_node	llist;
 	};
 };
 


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