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authorSteffen Klassert <steffen.klassert@secunet.com>2013-08-27 13:43:30 +0200
committerSteffen Klassert <steffen.klassert@secunet.com>2013-12-06 07:24:31 +0100
commit5b8ef3415a21f173ab115e90ec92c071a03f22d7 (patch)
treebb78d47430f22c24030375aeb2b358d8e38ddd18
parent283bc9f35bbbcb0e9ab4e6d2427da7f9f710d52d (diff)
downloadlinux-linaro-stable-5b8ef3415a21f173ab115e90ec92c071a03f22d7.tar.gz
xfrm: Remove ancient sleeping when the SA is in acquire state
We now queue packets to the policy if the states are not yet resolved, this replaces the ancient sleeping code. Also the sleeping can cause indefinite task hangs if the needed state does not get resolved. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
-rw-r--r--include/net/netns/xfrm.h2
-rw-r--r--net/key/af_key.c5
-rw-r--r--net/xfrm/xfrm_policy.c21
-rw-r--r--net/xfrm/xfrm_state.c21
4 files changed, 5 insertions, 44 deletions
diff --git a/include/net/netns/xfrm.h b/include/net/netns/xfrm.h
index ea28404e9d79..1006a265beb3 100644
--- a/include/net/netns/xfrm.h
+++ b/include/net/netns/xfrm.h
@@ -33,8 +33,6 @@ struct netns_xfrm {
struct hlist_head state_gc_list;
struct work_struct state_gc_work;
- wait_queue_head_t km_waitq;
-
struct list_head policy_all;
struct hlist_head *policy_byidx;
unsigned int policy_idx_hmask;
diff --git a/net/key/af_key.c b/net/key/af_key.c
index 9a039acf37e8..5beabd8ba772 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1380,10 +1380,9 @@ static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb
return 0;
spin_lock_bh(&x->lock);
- if (x->km.state == XFRM_STATE_ACQ) {
+ if (x->km.state == XFRM_STATE_ACQ)
x->km.state = XFRM_STATE_ERROR;
- wake_up(&net->xfrm.km_waitq);
- }
+
spin_unlock_bh(&x->lock);
xfrm_state_put(x);
return 0;
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 73b04d3df44e..a7487f34e813 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1901,8 +1901,7 @@ static struct xfrm_dst *xfrm_create_dummy_bundle(struct net *net,
if (IS_ERR(xdst))
return xdst;
- if (net->xfrm.sysctl_larval_drop || num_xfrms <= 0 ||
- (fl->flowi_flags & FLOWI_FLAG_CAN_SLEEP))
+ if (net->xfrm.sysctl_larval_drop || num_xfrms <= 0)
return xdst;
dst1 = &xdst->u.dst;
@@ -2077,7 +2076,6 @@ struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
u8 dir = policy_to_flow_dir(XFRM_POLICY_OUT);
int i, err, num_pols, num_xfrms = 0, drop_pols = 0;
-restart:
dst = NULL;
xdst = NULL;
route = NULL;
@@ -2157,23 +2155,8 @@ restart:
return make_blackhole(net, family, dst_orig);
}
- if (fl->flowi_flags & FLOWI_FLAG_CAN_SLEEP) {
- DECLARE_WAITQUEUE(wait, current);
- add_wait_queue(&net->xfrm.km_waitq, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- schedule();
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&net->xfrm.km_waitq, &wait);
-
- if (!signal_pending(current)) {
- dst_release(dst);
- goto restart;
- }
-
- err = -ERESTART;
- } else
- err = -EAGAIN;
+ err = -EAGAIN;
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTNOSTATES);
goto error;
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 290479d0746d..e845066547c4 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -372,8 +372,6 @@ static void xfrm_state_gc_task(struct work_struct *work)
hlist_for_each_entry_safe(x, tmp, &gc_list, gclist)
xfrm_state_gc_destroy(x);
-
- wake_up(&net->xfrm.km_waitq);
}
static inline unsigned long make_jiffies(long secs)
@@ -388,7 +386,6 @@ static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me)
{
struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
- struct net *net = xs_net(x);
unsigned long now = get_seconds();
long next = LONG_MAX;
int warn = 0;
@@ -458,12 +455,8 @@ resched:
goto out;
expired:
- if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) {
+ if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0)
x->km.state = XFRM_STATE_EXPIRED;
- wake_up(&net->xfrm.km_waitq);
- next = 2;
- goto resched;
- }
err = __xfrm_state_delete(x);
if (!err)
@@ -635,7 +628,6 @@ restart:
out:
spin_unlock_bh(&net->xfrm.xfrm_state_lock);
- wake_up(&net->xfrm.km_waitq);
return err;
}
EXPORT_SYMBOL(xfrm_state_flush);
@@ -948,8 +940,6 @@ static void __xfrm_state_insert(struct xfrm_state *x)
if (x->replay_maxage)
mod_timer(&x->rtimer, jiffies + x->replay_maxage);
- wake_up(&net->xfrm.km_waitq);
-
net->xfrm.state_num++;
xfrm_hash_grow_check(net, x->bydst.next != NULL);
@@ -1658,16 +1648,12 @@ EXPORT_SYMBOL(km_state_notify);
void km_state_expired(struct xfrm_state *x, int hard, u32 portid)
{
- struct net *net = xs_net(x);
struct km_event c;
c.data.hard = hard;
c.portid = portid;
c.event = XFRM_MSG_EXPIRE;
km_state_notify(x, &c);
-
- if (hard)
- wake_up(&net->xfrm.km_waitq);
}
EXPORT_SYMBOL(km_state_expired);
@@ -1710,16 +1696,12 @@ EXPORT_SYMBOL(km_new_mapping);
void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid)
{
- struct net *net = xp_net(pol);
struct km_event c;
c.data.hard = hard;
c.portid = portid;
c.event = XFRM_MSG_POLEXPIRE;
km_policy_notify(pol, dir, &c);
-
- if (hard)
- wake_up(&net->xfrm.km_waitq);
}
EXPORT_SYMBOL(km_policy_expired);
@@ -2028,7 +2010,6 @@ 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);
spin_lock_init(&net->xfrm.xfrm_state_lock);
return 0;