提交 b8a0ae20 编写于 作者: A Alexey Dobriyan 提交者: David S. Miller

netns xfrm: per-netns state GC list

km_waitq is going to be made per-netns to disallow spurious wakeups
in __xfrm_lookup().

To not wakeup after every garbage-collected xfrm_state (which potentially
can be from different netns) make state GC list per-netns.
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 63082733
......@@ -20,6 +20,7 @@ struct netns_xfrm {
unsigned int state_hmask;
unsigned int state_num;
struct work_struct state_hash_work;
struct hlist_head state_gc_list;
};
#endif
......@@ -177,7 +177,6 @@ static DEFINE_RWLOCK(xfrm_state_afinfo_lock);
static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO];
static struct work_struct xfrm_state_gc_work;
static HLIST_HEAD(xfrm_state_gc_list);
static DEFINE_SPINLOCK(xfrm_state_gc_lock);
int __xfrm_state_delete(struct xfrm_state *x);
......@@ -394,7 +393,7 @@ static void xfrm_state_gc_task(struct work_struct *data)
struct hlist_head gc_list;
spin_lock_bh(&xfrm_state_gc_lock);
hlist_move_list(&xfrm_state_gc_list, &gc_list);
hlist_move_list(&init_net.xfrm.state_gc_list, &gc_list);
spin_unlock_bh(&xfrm_state_gc_lock);
hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist)
......@@ -527,7 +526,7 @@ void __xfrm_state_destroy(struct xfrm_state *x)
WARN_ON(x->km.state != XFRM_STATE_DEAD);
spin_lock_bh(&xfrm_state_gc_lock);
hlist_add_head(&x->gclist, &xfrm_state_gc_list);
hlist_add_head(&x->gclist, &init_net.xfrm.state_gc_list);
spin_unlock_bh(&xfrm_state_gc_lock);
schedule_work(&xfrm_state_gc_work);
}
......@@ -2088,6 +2087,7 @@ int __net_init xfrm_state_init(struct net *net)
net->xfrm.state_num = 0;
INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
INIT_HLIST_HEAD(&net->xfrm.state_gc_list);
INIT_WORK(&xfrm_state_gc_work, xfrm_state_gc_task);
return 0;
......
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