netns: ipmr: store netns in struct mfc_cache
This patch stores into struct mfc_cache the network namespace each
mfc_cache belongs to. The new member is mfc_net.
mfc_net is assigned at cache allocation and doesn't change during
the rest of the cache entry life.
A new net parameter is added to ipmr_cache_alloc/ipmr_cache_alloc_unres.
This will help to retrieve the current netns around the IPv4 multicast
routing code.
At the moment, all mfc_cache are allocated in init_net.
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/mroute.h b/include/linux/mroute.h
index 8a45569..beaf3aa 100644
--- a/include/linux/mroute.h
+++ b/include/linux/mroute.h
@@ -193,6 +193,9 @@
struct mfc_cache
{
struct mfc_cache *next; /* Next entry on cache line */
+#ifdef CONFIG_NET_NS
+ struct net *mfc_net;
+#endif
__be32 mfc_mcastgrp; /* Group the entry belongs to */
__be32 mfc_origin; /* Source of packet */
vifi_t mfc_parent; /* Source interface */
@@ -215,6 +218,18 @@
} mfc_un;
};
+static inline
+struct net *mfc_net(const struct mfc_cache *mfc)
+{
+ return read_pnet(&mfc->mfc_net);
+}
+
+static inline
+void mfc_net_set(struct mfc_cache *mfc, struct net *net)
+{
+ write_pnet(&mfc->mfc_net, hold_net(net));
+}
+
#define MFC_STATIC 1
#define MFC_NOTIFY 2