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mrp: add periodictimer to allow retries when packets get lost

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MRP doesn't implement the periodictimer in 802.1Q, so it never retries
if packets get lost.  I ran into this problem when MRP sent a MVRP
JoinIn before the interface was fully up.  The JoinIn was lost, MRP
didn't retry, and MVRP registration failed.

Tested against Juniper QFabric switches

Signed-off-by: Noel Burton-Krahn <noel@burton-krahn.com>
Acked-by: David Ward <david.ward@ll.mit.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Noel Burton-Krahn 2013-09-18 12:24:40 -07:00 committed by David S. Miller
parent a224bd36bf
commit 9fe34f5d92
2 changed files with 28 additions and 0 deletions
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1
include/net/mrp.h
View File

@ -112,6 +112,7 @@ struct mrp_applicant {
struct mrp_application *app;
struct net_device *dev;
struct timer_list join_timer;
struct timer_list periodic_timer;
spinlock_t lock;
struct sk_buff_head queue;

27
net/802/mrp.c
View File

@ -24,6 +24,11 @@
static unsigned int mrp_join_time __read_mostly = 200;
module_param(mrp_join_time, uint, 0644);
MODULE_PARM_DESC(mrp_join_time, "Join time in ms (default 200ms)");
static unsigned int mrp_periodic_time __read_mostly = 1000;
module_param(mrp_periodic_time, uint, 0644);
MODULE_PARM_DESC(mrp_periodic_time, "Periodic time in ms (default 1s)");
MODULE_LICENSE("GPL");
static const u8
@ -595,6 +600,24 @@ static void mrp_join_timer(unsigned long data)
mrp_join_timer_arm(app);
}
static void mrp_periodic_timer_arm(struct mrp_applicant *app)
{
mod_timer(&app->periodic_timer,
jiffies + msecs_to_jiffies(mrp_periodic_time));
}
static void mrp_periodic_timer(unsigned long data)
{
struct mrp_applicant *app = (struct mrp_applicant *)data;
spin_lock(&app->lock);
mrp_mad_event(app, MRP_EVENT_PERIODIC);
mrp_pdu_queue(app);
spin_unlock(&app->lock);
mrp_periodic_timer_arm(app);
}
static int mrp_pdu_parse_end_mark(struct sk_buff *skb, int *offset)
{
__be16 endmark;
@ -845,6 +868,9 @@ int mrp_init_applicant(struct net_device *dev, struct mrp_application *appl)
rcu_assign_pointer(dev->mrp_port->applicants[appl->type], app);
setup_timer(&app->join_timer, mrp_join_timer, (unsigned long)app);
mrp_join_timer_arm(app);
setup_timer(&app->periodic_timer, mrp_periodic_timer,
(unsigned long)app);
mrp_periodic_timer_arm(app);
return 0;
err3:
@ -870,6 +896,7 @@ void mrp_uninit_applicant(struct net_device *dev, struct mrp_application *appl)
* all pending messages before the applicant is gone.
*/
del_timer_sync(&app->join_timer);
del_timer_sync(&app->periodic_timer);
spin_lock_bh(&app->lock);
mrp_mad_event(app, MRP_EVENT_TX);