bonding: Implement port churn-machine (AD standard 43.4.17).

[linux-2.6-microblaze.git] / include / net / bond_3ad.h

diff --git a/include/net/bond_3ad.h b/include/net/bond_3ad.h
index f04cdbb..c2a40a1 100644 (file)
--- a/include/net/bond_3ad.h
+++ b/include/net/bond_3ad.h
@@ -82,6 +82,13 @@ typedef enum {
        AD_TRANSMIT             /* tx Machine */
 } tx_states_t;
 
+/* churn machine states(43.4.17 in the 802.3ad standard) */
+typedef enum {
+        AD_CHURN_MONITOR, /* monitoring for churn */
+        AD_CHURN,         /* churn detected (error) */
+        AD_NO_CHURN       /* no churn (no error) */
+} churn_state_t;
+
 /* rx indication types */
 typedef enum {
        AD_TYPE_LACPDU = 1,     /* type lacpdu */
@@ -229,6 +236,12 @@ typedef struct port {
        u16 sm_mux_timer_counter;       /* state machine mux timer counter */
        tx_states_t sm_tx_state;        /* state machine tx state */
        u16 sm_tx_timer_counter;        /* state machine tx timer counter(allways on - enter to transmit state 3 time per second) */
+       u16 sm_churn_actor_timer_counter;
+       u16 sm_churn_partner_timer_counter;
+       u32 churn_actor_count;
+       u32 churn_partner_count;
+       churn_state_t sm_churn_actor_state;
+       churn_state_t sm_churn_partner_state;
        struct slave *slave;            /* pointer to the bond slave that this port belongs to */
        struct aggregator *aggregator;  /* pointer to an aggregator that this port related to */
        struct port *next_port_in_aggregator;   /* Next port on the linked list of the parent aggregator */
@@ -262,6 +275,22 @@ struct ad_slave_info {
        u16 id;
 };
 
+static inline const char *bond_3ad_churn_desc(churn_state_t state)
+{
+       static const char *const churn_description[] = {
+               "monitoring",
+               "churned",
+               "none",
+               "unknown"
+       };
+       int max_size = sizeof(churn_description) / sizeof(churn_description[0]);
+
+       if (state >= max_size)
+               state = max_size - 1;
+
+       return churn_description[state];
+}
+
 /* ========== AD Exported functions to the main bonding code ========== */
 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution);
 void bond_3ad_bind_slave(struct slave *slave);