diff options
| author | Noel Burton-Krahn <noel@burton-krahn.com> | 2013-09-18 12:24:40 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-09-23 16:53:52 -0400 |
| commit | 9fe34f5d920b183ec063550e0f4ec854aa373316 (patch) | |
| tree | ece6e10648809dc2aa87e434b3c7b0f3b0dea0d0 | |
| parent | a224bd36bf5ccc72d0f12ab11216706762133177 (diff) | |
| download | linux-9fe34f5d920b183ec063550e0f4ec854aa373316.tar.bz2 | |
mrp: add periodictimer to allow retries when packets get lost
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>
| -rw-r--r-- | include/net/mrp.h | 1 | ||||
| -rw-r--r-- | net/802/mrp.c | 27 |
2 files changed, 28 insertions, 0 deletions
diff --git a/include/net/mrp.h b/include/net/mrp.h index 4fbf02aa2ec1..0f7558b638ae 100644 --- a/include/net/mrp.h +++ b/include/net/mrp.h @@ -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; diff --git a/net/802/mrp.c b/net/802/mrp.c index 1eb05d80b07b..3ed616215870 100644 --- a/net/802/mrp.c +++ b/net/802/mrp.c @@ -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); |