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Commit f230d1e8 authored by Martin KaFai Lau's avatar Martin KaFai Lau Committed by David S. Miller
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ipv6: Rename the dst_cache helper functions in ip6_tunnel 



It is a prep work to fix the dst_entry refcnt bugs in
ip6_tunnel.

This patch rename:
1. ip6_tnl_dst_check() to ip6_tnl_dst_get() to better
   reflect that it will take a dst refcnt in the next patch.
2. ip6_tnl_dst_store() to ip6_tnl_dst_set() to have a more
   conventional name matching with ip6_tnl_dst_get().

Signed-off-by: default avatarMartin KaFai Lau <kafai@fb.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a3c119d3

include/net/ip6_tunnel.h

+2 −2
Original line number Diff line number Diff line
@@ -60,9 +60,9 @@ struct ipv6_tlv_tnl_enc_lim { 
	__u8 encap_limit;	/* tunnel encapsulation limit   */

} __packed;



struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t);

struct dst_entry *ip6_tnl_dst_get(struct ip6_tnl *t);

void ip6_tnl_dst_reset(struct ip6_tnl *t);

void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst);

void ip6_tnl_dst_set(struct ip6_tnl *t, struct dst_entry *dst);

int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,

		const struct in6_addr *raddr);

int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,

net/ipv6/ip6_gre.c

+2 −2
Original line number Diff line number Diff line
@@ -634,7 +634,7 @@ static netdev_tx_t ip6gre_xmit2(struct sk_buff *skb, 
	}



	if (!fl6->flowi6_mark)

		dst = ip6_tnl_dst_check(tunnel);

		dst = ip6_tnl_dst_get(tunnel);



	if (!dst) {

		ndst = ip6_route_output(net, NULL, fl6);
@@ -763,7 +763,7 @@ static netdev_tx_t ip6gre_xmit2(struct sk_buff *skb, 


	ip6tunnel_xmit(NULL, skb, dev);

	if (ndst)

		ip6_tnl_dst_store(tunnel, ndst);

		ip6_tnl_dst_set(tunnel, ndst);

	return 0;

tx_err_link_failure:

	stats->tx_carrier_errors++;

net/ipv6/ip6_tunnel.c

+6 −6
Original line number Diff line number Diff line
@@ -126,7 +126,7 @@ static struct net_device_stats *ip6_get_stats(struct net_device *dev) 
 * Locking : hash tables are protected by RCU and RTNL

 */



struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t)

struct dst_entry *ip6_tnl_dst_get(struct ip6_tnl *t)

{

	struct dst_entry *dst = t->dst_cache;
@@ -139,7 +139,7 @@ struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t) 


	return dst;

}

EXPORT_SYMBOL_GPL(ip6_tnl_dst_check);

EXPORT_SYMBOL_GPL(ip6_tnl_dst_get);



void ip6_tnl_dst_reset(struct ip6_tnl *t)

{
@@ -148,14 +148,14 @@ void ip6_tnl_dst_reset(struct ip6_tnl *t) 
}

EXPORT_SYMBOL_GPL(ip6_tnl_dst_reset);



void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst)

void ip6_tnl_dst_set(struct ip6_tnl *t, struct dst_entry *dst)

{

	struct rt6_info *rt = (struct rt6_info *) dst;

	t->dst_cookie = rt6_get_cookie(rt);

	dst_release(t->dst_cache);

	t->dst_cache = dst;

}

EXPORT_SYMBOL_GPL(ip6_tnl_dst_store);

EXPORT_SYMBOL_GPL(ip6_tnl_dst_set);



/**

 * ip6_tnl_lookup - fetch tunnel matching the end-point addresses
@@ -1010,7 +1010,7 @@ static int ip6_tnl_xmit2(struct sk_buff *skb, 
		memcpy(&fl6->daddr, addr6, sizeof(fl6->daddr));

		neigh_release(neigh);

	} else if (!fl6->flowi6_mark)

		dst = ip6_tnl_dst_check(t);

		dst = ip6_tnl_dst_get(t);



	if (!ip6_tnl_xmit_ctl(t, &fl6->saddr, &fl6->daddr))

		goto tx_err_link_failure;
@@ -1102,7 +1102,7 @@ static int ip6_tnl_xmit2(struct sk_buff *skb, 
	ipv6h->daddr = fl6->daddr;

	ip6tunnel_xmit(NULL, skb, dev);

	if (ndst)

		ip6_tnl_dst_store(t, ndst);

		ip6_tnl_dst_set(t, ndst);

	return 0;

tx_err_link_failure:

	stats->tx_carrier_errors++;