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ipv6: addrlabel: remove refcounting 

After previous patch ("ipv6: addrlabel: rework ip6addrlbl_get()")
we can remove the refcount from struct ip6addrlbl_entry,
since it is no longer elevated in p6addrlbl_get()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2017-10-09 09:52:25 -07:00 committed by David S. Miller
parent 66c77ff3a0
commit 2809c0957d
1 changed files with 4 additions and 29 deletions
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33
net/ipv6/addrlabel.c
View File

@ -18,7 +18,6 @@
#include <linux/if_addrlabel.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/refcount.h>
#if 0
#define ADDRLABEL(x...) printk(x)
@ -36,7 +35,6 @@ struct ip6addrlbl_entry {
int addrtype;
u32 label;
struct hlist_node list;
refcount_t refcnt;
struct rcu_head rcu;
};
@ -111,28 +109,6 @@ static const __net_initconst struct ip6addrlbl_init_table
}
};
/* Object management */
static inline void ip6addrlbl_free(struct ip6addrlbl_entry *p)
{
kfree(p);
}
static void ip6addrlbl_free_rcu(struct rcu_head *h)
{
ip6addrlbl_free(container_of(h, struct ip6addrlbl_entry, rcu));
}
static bool ip6addrlbl_hold(struct ip6addrlbl_entry *p)
{
return refcount_inc_not_zero(&p->refcnt);
}
static inline void ip6addrlbl_put(struct ip6addrlbl_entry *p)
{
if (refcount_dec_and_test(&p->refcnt))
call_rcu(&p->rcu, ip6addrlbl_free_rcu);
}
/* Find label */
static bool __ip6addrlbl_match(const struct ip6addrlbl_entry *p,
const struct in6_addr *addr,
@ -219,7 +195,6 @@ static struct ip6addrlbl_entry *ip6addrlbl_alloc(const struct in6_addr *prefix,
newp->addrtype = addrtype;
newp->label = label;
INIT_HLIST_NODE(&newp->list);
refcount_set(&newp->refcnt, 1);
return newp;
}
@ -243,7 +218,7 @@ static int __ip6addrlbl_add(struct net *net, struct ip6addrlbl_entry *newp,
goto out;
}
hlist_replace_rcu(&p->list, &newp->list);
ip6addrlbl_put(p);
kfree_rcu(p, rcu);
goto out;
} else if ((p->prefixlen == newp->prefixlen && !p->ifindex) ||
(p->prefixlen < newp->prefixlen)) {
@ -281,7 +256,7 @@ static int ip6addrlbl_add(struct net *net,
ret = __ip6addrlbl_add(net, newp, replace);
spin_unlock(&net->ipv6.ip6addrlbl_table.lock);
if (ret)
ip6addrlbl_free(newp);
kfree(newp);
return ret;
}
@ -302,7 +277,7 @@ static int __ip6addrlbl_del(struct net *net,
p->ifindex == ifindex &&
ipv6_addr_equal(&p->prefix, prefix)) {
hlist_del_rcu(&p->list);
ip6addrlbl_put(p);
kfree_rcu(p, rcu);
ret = 0;
break;
}
@ -360,7 +335,7 @@ static void __net_exit ip6addrlbl_net_exit(struct net *net)
spin_lock(&net->ipv6.ip6addrlbl_table.lock);
hlist_for_each_entry_safe(p, n, &net->ipv6.ip6addrlbl_table.head, list) {
hlist_del_rcu(&p->list);
ip6addrlbl_put(p);
kfree_rcu(p, rcu);
}
spin_unlock(&net->ipv6.ip6addrlbl_table.lock);
}