net/smc: introduce link group type

Add a type field to the link group which reflects the current link group
redundancy state.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h
index 7039921..51366a9 100644 (file)
--- a/net/smc/smc_core.h
+++ b/net/smc/smc_core.h
@@ -197,6 +197,14 @@ struct smc_rtoken {                                /* address/key of remote RMB */
 
 struct smcd_dev;
 
+enum smc_lgr_type {                            /* redundancy state of lgr */
+       SMC_LGR_NONE,                   /* no active links, lgr to be deleted */
+       SMC_LGR_SINGLE,                 /* 1 active RNIC on each peer */
+       SMC_LGR_SYMMETRIC,              /* 2 active RNICs on each peer */
+       SMC_LGR_ASYMMETRIC_PEER,        /* local has 2, peer 1 active RNICs */
+       SMC_LGR_ASYMMETRIC_LOCAL,       /* local has 1, peer 2 active RNICs */
+};
+
 enum smc_llc_flowtype {
        SMC_LLC_FLOW_NONE       = 0,
        SMC_LLC_FLOW_ADD_LINK   = 2,
@@ -246,6 +254,8 @@ struct smc_link_group {
                        DECLARE_BITMAP(rtokens_used_mask, SMC_RMBS_PER_LGR_MAX);
                                                /* used rtoken elements */
                        u8                      next_link_id;
+                       enum smc_lgr_type       type;
+                                               /* redundancy state */
                        struct list_head        llc_event_q;
                                                /* queue for llc events */
                        spinlock_t              llc_event_q_lock;