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Commit b6e71bde authored by Tom Herbert's avatar Tom Herbert Committed by David S. Miller
Browse files

ila: Flush netlink command to clear xlat table 



Add ILA_CMD_FLUSH netlink command to clear the ILA translation table.

Signed-off-by: default avatarTom Herbert <tom@quantonium.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ad68147e

include/uapi/linux/ila.h

+1 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ enum { 
	ILA_CMD_ADD,

	ILA_CMD_DEL,

	ILA_CMD_GET,

	ILA_CMD_FLUSH,



	__ILA_CMD_MAX,

};

net/ipv6/ila/ila.h

+1 −0
Original line number Diff line number Diff line
@@ -123,6 +123,7 @@ void ila_xlat_exit_net(struct net *net); 
int ila_xlat_nl_cmd_add_mapping(struct sk_buff *skb, struct genl_info *info);

int ila_xlat_nl_cmd_del_mapping(struct sk_buff *skb, struct genl_info *info);

int ila_xlat_nl_cmd_get_mapping(struct sk_buff *skb, struct genl_info *info);

int ila_xlat_nl_cmd_flush(struct sk_buff *skb, struct genl_info *info);

int ila_xlat_nl_dump_start(struct netlink_callback *cb);

int ila_xlat_nl_dump_done(struct netlink_callback *cb);

int ila_xlat_nl_dump(struct sk_buff *skb, struct netlink_callback *cb);

net/ipv6/ila/ila_main.c

+6 −0
Original line number Diff line number Diff line
@@ -26,6 +26,12 @@ static const struct genl_ops ila_nl_ops[] = { 
		.policy = ila_nl_policy,

		.flags = GENL_ADMIN_PERM,

	},

	{

		.cmd = ILA_CMD_FLUSH,

		.doit = ila_xlat_nl_cmd_flush,

		.policy = ila_nl_policy,

		.flags = GENL_ADMIN_PERM,

	},

	{

		.cmd = ILA_CMD_GET,

		.doit = ila_xlat_nl_cmd_get_mapping,

net/ipv6/ila/ila_xlat.c

+60 −2
Original line number Diff line number Diff line
@@ -164,9 +164,9 @@ static inline void ila_release(struct ila_map *ila) 
	kfree_rcu(ila, rcu);

}



static void ila_free_cb(void *ptr, void *arg)

static void ila_free_node(struct ila_map *ila)

{

	struct ila_map *ila = (struct ila_map *)ptr, *next;

	struct ila_map *next;



	/* Assume rcu_readlock held */

	while (ila) {
@@ -176,6 +176,11 @@ static void ila_free_cb(void *ptr, void *arg) 
	}

}



static void ila_free_cb(void *ptr, void *arg)

{

	ila_free_node((struct ila_map *)ptr);

}



static int ila_xlat_addr(struct sk_buff *skb, bool sir2ila);



static unsigned int
@@ -365,6 +370,59 @@ int ila_xlat_nl_cmd_del_mapping(struct sk_buff *skb, struct genl_info *info) 
	return 0;

}



static inline spinlock_t *lock_from_ila_map(struct ila_net *ilan,

					    struct ila_map *ila)

{

	return ila_get_lock(ilan, ila->xp.ip.locator_match);

}



int ila_xlat_nl_cmd_flush(struct sk_buff *skb, struct genl_info *info)

{

	struct net *net = genl_info_net(info);

	struct ila_net *ilan = net_generic(net, ila_net_id);

	struct rhashtable_iter iter;

	struct ila_map *ila;

	spinlock_t *lock;

	int ret;



	ret = rhashtable_walk_init(&ilan->xlat.rhash_table, &iter, GFP_KERNEL);

	if (ret)

		goto done;



	rhashtable_walk_start(&iter);



	for (;;) {

		ila = rhashtable_walk_next(&iter);



		if (IS_ERR(ila)) {

			if (PTR_ERR(ila) == -EAGAIN)

				continue;

			ret = PTR_ERR(ila);

			goto done;

		} else if (!ila) {

			break;

		}



		lock = lock_from_ila_map(ilan, ila);



		spin_lock(lock);



		ret = rhashtable_remove_fast(&ilan->xlat.rhash_table,

					     &ila->node, rht_params);

		if (!ret)

			ila_free_node(ila);



		spin_unlock(lock);



		if (ret)

			break;

	}



done:

	rhashtable_walk_stop(&iter);

	return ret;

}



static int ila_fill_info(struct ila_map *ila, struct sk_buff *msg)

{

	if (nla_put_u64_64bit(msg, ILA_ATTR_LOCATOR,