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[XFRM]: Fix aevent timer.

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Send aevent immediately if we have sent nothing since last timer and
this is the first packet.

Fixes a corner case when packet threshold is very high, the timer low
and a very low packet rate input which is bursty.

Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jamal Hadi Salim 2006-04-14 15:03:05 -07:00 committed by David S. Miller
parent 6c97e72a16
commit 2717096ab4
2 changed files with 27 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
include/net/xfrm.h
View File

@ -143,6 +143,11 @@ struct xfrm_state
/* Replay detection state at the time we sent the last notification */
struct xfrm_replay_state preplay;
/* internal flag that only holds state for delayed aevent at the
* moment
*/
u32 xflags;
/* Replay detection notification settings */
u32 replay_maxage;
u32 replay_maxdiff;
@ -168,6 +173,9 @@ struct xfrm_state
void *data;
};
/* xflags - make enum if more show up */
#define XFRM_TIME_DEFER 1
enum {
XFRM_STATE_VOID,
XFRM_STATE_ACQ,

21
net/xfrm/xfrm_state.c
View File

@ -805,16 +805,22 @@ void xfrm_replay_notify(struct xfrm_state *x, int event)
case XFRM_REPLAY_UPDATE:
if (x->replay_maxdiff &&
(x->replay.seq - x->preplay.seq < x->replay_maxdiff) &&
(x->replay.oseq - x->preplay.oseq < x->replay_maxdiff))
(x->replay.oseq - x->preplay.oseq < x->replay_maxdiff)) {
if (x->xflags & XFRM_TIME_DEFER)
event = XFRM_REPLAY_TIMEOUT;
else
return;
}
break;
case XFRM_REPLAY_TIMEOUT:
if ((x->replay.seq == x->preplay.seq) &&
(x->replay.bitmap == x->preplay.bitmap) &&
(x->replay.oseq == x->preplay.oseq))
(x->replay.oseq == x->preplay.oseq)) {
x->xflags |= XFRM_TIME_DEFER;
return;
}
break;
}
@ -825,8 +831,10 @@ void xfrm_replay_notify(struct xfrm_state *x, int event)
km_state_notify(x, &c);
if (x->replay_maxage &&
!mod_timer(&x->rtimer, jiffies + x->replay_maxage))
!mod_timer(&x->rtimer, jiffies + x->replay_maxage)) {
xfrm_state_hold(x);
x->xflags &= ~XFRM_TIME_DEFER;
}
}
EXPORT_SYMBOL(xfrm_replay_notify);
@ -836,10 +844,15 @@ static void xfrm_replay_timer_handler(unsigned long data)
spin_lock(&x->lock);
if (xfrm_aevent_is_on() && x->km.state == XFRM_STATE_VALID)
if (x->km.state == XFRM_STATE_VALID) {
if (xfrm_aevent_is_on())
xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT);
else
x->xflags |= XFRM_TIME_DEFER;
}
spin_unlock(&x->lock);
xfrm_state_put(x);
}
int xfrm_replay_check(struct xfrm_state *x, u32 seq)