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Commit b362053a authored by Yotam Gigi's avatar Yotam Gigi Committed by David S. Miller
Browse files

ipmr: Send FIB notifications on MFC and VIF entries 



Use the newly introduced notification chain to send events upon VIF and MFC
addition and deletion. The MFC notifications are sent only on resolved MFC
entries, as unresolved cannot be offloaded.

Signed-off-by: default avatarYotam Gigi <yotamg@mellanox.com>
Reviewed-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Reviewed-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4d65b948

net/ipv4/ipmr.c

+53 −0
Original line number Diff line number Diff line
@@ -627,6 +627,27 @@ static int call_ipmr_vif_entry_notifier(struct notifier_block *nb, 
	return call_fib_notifier(nb, net, event_type, &info.info);

}



static int call_ipmr_vif_entry_notifiers(struct net *net,

					 enum fib_event_type event_type,

					 struct vif_device *vif,

					 vifi_t vif_index, u32 tb_id)

{

	struct vif_entry_notifier_info info = {

		.info = {

			.family = RTNL_FAMILY_IPMR,

			.net = net,

		},

		.dev = vif->dev,

		.vif_index = vif_index,

		.vif_flags = vif->flags,

		.tb_id = tb_id,

	};



	ASSERT_RTNL();

	net->ipv4.ipmr_seq++;

	return call_fib_notifiers(net, event_type, &info.info);

}



static int call_ipmr_mfc_entry_notifier(struct notifier_block *nb,

					struct net *net,

					enum fib_event_type event_type,
@@ -644,6 +665,24 @@ static int call_ipmr_mfc_entry_notifier(struct notifier_block *nb, 
	return call_fib_notifier(nb, net, event_type, &info.info);

}



static int call_ipmr_mfc_entry_notifiers(struct net *net,

					 enum fib_event_type event_type,

					 struct mfc_cache *mfc, u32 tb_id)

{

	struct mfc_entry_notifier_info info = {

		.info = {

			.family = RTNL_FAMILY_IPMR,

			.net = net,

		},

		.mfc = mfc,

		.tb_id = tb_id

	};



	ASSERT_RTNL();

	net->ipv4.ipmr_seq++;

	return call_fib_notifiers(net, event_type, &info.info);

}



/**

 *	vif_delete - Delete a VIF entry

 *	@notify: Set to 1, if the caller is a notifier_call
@@ -651,6 +690,7 @@ static int call_ipmr_mfc_entry_notifier(struct notifier_block *nb, 
static int vif_delete(struct mr_table *mrt, int vifi, int notify,

		      struct list_head *head)

{

	struct net *net = read_pnet(&mrt->net);

	struct vif_device *v;

	struct net_device *dev;

	struct in_device *in_dev;
@@ -660,6 +700,10 @@ static int vif_delete(struct mr_table *mrt, int vifi, int notify, 


	v = &mrt->vif_table[vifi];



	if (VIF_EXISTS(mrt, vifi))

		call_ipmr_vif_entry_notifiers(net, FIB_EVENT_VIF_DEL, v, vifi,

					      mrt->id);



	write_lock_bh(&mrt_lock);

	dev = v->dev;

	v->dev = NULL;
@@ -909,6 +953,7 @@ static int vif_add(struct net *net, struct mr_table *mrt, 
	if (vifi+1 > mrt->maxvif)

		mrt->maxvif = vifi+1;

	write_unlock_bh(&mrt_lock);

	call_ipmr_vif_entry_notifiers(net, FIB_EVENT_VIF_ADD, v, vifi, mrt->id);

	return 0;

}
@@ -1209,6 +1254,7 @@ static int ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, 


static int ipmr_mfc_delete(struct mr_table *mrt, struct mfcctl *mfc, int parent)

{

	struct net *net = read_pnet(&mrt->net);

	struct mfc_cache *c;



	/* The entries are added/deleted only under RTNL */
@@ -1220,6 +1266,7 @@ static int ipmr_mfc_delete(struct mr_table *mrt, struct mfcctl *mfc, int parent) 
		return -ENOENT;

	rhltable_remove(&mrt->mfc_hash, &c->mnode, ipmr_rht_params);

	list_del_rcu(&c->list);

	call_ipmr_mfc_entry_notifiers(net, FIB_EVENT_ENTRY_DEL, c, mrt->id);

	mroute_netlink_event(mrt, c, RTM_DELROUTE);

	ipmr_cache_put(c);
@@ -1248,6 +1295,8 @@ static int ipmr_mfc_add(struct net *net, struct mr_table *mrt, 
		if (!mrtsock)

			c->mfc_flags |= MFC_STATIC;

		write_unlock_bh(&mrt_lock);

		call_ipmr_mfc_entry_notifiers(net, FIB_EVENT_ENTRY_REPLACE, c,

					      mrt->id);

		mroute_netlink_event(mrt, c, RTM_NEWROUTE);

		return 0;

	}
@@ -1297,6 +1346,7 @@ static int ipmr_mfc_add(struct net *net, struct mr_table *mrt, 
		ipmr_cache_resolve(net, mrt, uc, c);

		ipmr_cache_free(uc);

	}

	call_ipmr_mfc_entry_notifiers(net, FIB_EVENT_ENTRY_ADD, c, mrt->id);

	mroute_netlink_event(mrt, c, RTM_NEWROUTE);

	return 0;

}
@@ -1304,6 +1354,7 @@ static int ipmr_mfc_add(struct net *net, struct mr_table *mrt, 
/* Close the multicast socket, and clear the vif tables etc */

static void mroute_clean_tables(struct mr_table *mrt, bool all)

{

	struct net *net = read_pnet(&mrt->net);

	struct mfc_cache *c, *tmp;

	LIST_HEAD(list);

	int i;
@@ -1322,6 +1373,8 @@ static void mroute_clean_tables(struct mr_table *mrt, bool all) 
			continue;

		rhltable_remove(&mrt->mfc_hash, &c->mnode, ipmr_rht_params);

		list_del_rcu(&c->list);

		call_ipmr_mfc_entry_notifiers(net, FIB_EVENT_ENTRY_DEL, c,

					      mrt->id);

		mroute_netlink_event(mrt, c, RTM_DELROUTE);

		ipmr_cache_put(c);

	}