From 50a30657fd7ee77a94a6bf0ad86eba7c37c3032e Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Tue, 25 Nov 2008 17:21:01 -0800 Subject: netns xfrm: per-netns km_waitq Disallow spurious wakeups in __xfrm_lookup(). Signed-off-by: Alexey Dobriyan Signed-off-by: David S. Miller --- net/xfrm/xfrm_policy.c | 4 ++-- net/xfrm/xfrm_state.c | 16 +++++++--------- 2 files changed, 9 insertions(+), 11 deletions(-) (limited to 'net/xfrm') diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 8e7671b9e76e..cf2bf3aa7ab4 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -1691,11 +1691,11 @@ restart: if (err == -EAGAIN && (flags & XFRM_LOOKUP_WAIT)) { DECLARE_WAITQUEUE(wait, current); - add_wait_queue(&km_waitq, &wait); + add_wait_queue(&init_net.xfrm.km_waitq, &wait); set_current_state(TASK_INTERRUPTIBLE); schedule(); set_current_state(TASK_RUNNING); - remove_wait_queue(&km_waitq, &wait); + remove_wait_queue(&init_net.xfrm.km_waitq, &wait); nx = xfrm_tmpl_resolve(pols, npols, fl, xfrm, family); diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index 69c0b06bf756..24bd89e76236 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -170,9 +170,6 @@ out_unlock: mutex_unlock(&hash_resize_mutex); } -DECLARE_WAIT_QUEUE_HEAD(km_waitq); -EXPORT_SYMBOL(km_waitq); - static DEFINE_RWLOCK(xfrm_state_afinfo_lock); static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO]; @@ -399,7 +396,7 @@ static void xfrm_state_gc_task(struct work_struct *work) hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist) xfrm_state_gc_destroy(x); - wake_up(&km_waitq); + wake_up(&net->xfrm.km_waitq); } static inline unsigned long make_jiffies(long secs) @@ -470,7 +467,7 @@ resched: expired: if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) { x->km.state = XFRM_STATE_EXPIRED; - wake_up(&km_waitq); + wake_up(&init_net.xfrm.km_waitq); next = 2; goto resched; } @@ -638,7 +635,7 @@ restart: out: spin_unlock_bh(&xfrm_state_lock); - wake_up(&km_waitq); + wake_up(&init_net.xfrm.km_waitq); return err; } EXPORT_SYMBOL(xfrm_state_flush); @@ -929,7 +926,7 @@ static void __xfrm_state_insert(struct xfrm_state *x) if (x->replay_maxage) mod_timer(&x->rtimer, jiffies + x->replay_maxage); - wake_up(&km_waitq); + wake_up(&init_net.xfrm.km_waitq); init_net.xfrm.state_num++; @@ -1743,7 +1740,7 @@ void km_state_expired(struct xfrm_state *x, int hard, u32 pid) km_state_notify(x, &c); if (hard) - wake_up(&km_waitq); + wake_up(&init_net.xfrm.km_waitq); } EXPORT_SYMBOL(km_state_expired); @@ -1794,7 +1791,7 @@ void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid) km_policy_notify(pol, dir, &c); if (hard) - wake_up(&km_waitq); + wake_up(&init_net.xfrm.km_waitq); } EXPORT_SYMBOL(km_policy_expired); @@ -2089,6 +2086,7 @@ int __net_init xfrm_state_init(struct net *net) INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); INIT_HLIST_HEAD(&net->xfrm.state_gc_list); INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task); + init_waitqueue_head(&net->xfrm.km_waitq); return 0; out_byspi: -- cgit v1.2.3