net/smc: log important pnetid and state change events

Print to system log when SMC links are available or go down, link group
state changes or pnetids are applied to and removed from devices.
The log entries are triggered by either user configuration actions or
adapter activation/deactivation events and are not expected to happen
often. The entries help SMC users to keep track of the SMC link group
status and to detect when actions are needed (like to add replacements
for failed adapters).

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>

net/smc/af_smc.c

@@ -378,8 +378,6 @@ static int smcr_clnt_conf_first_link(struct smc_sock *smc)
 	struct smc_llc_qentry *qentry;
 	int rc;
 
-	link->lgr->type = SMC_LGR_SINGLE;
-
 	/* receive CONFIRM LINK request from server over RoCE fabric */
 	qentry = smc_llc_wait(link->lgr, NULL, SMC_LLC_WAIT_TIME,
 			      SMC_LLC_CONFIRM_LINK);
@@ -414,6 +412,7 @@ static int smcr_clnt_conf_first_link(struct smc_sock *smc)
 		return SMC_CLC_DECL_TIMEOUT_CL;
 
 	smc_llc_link_active(link);
+	smcr_lgr_set_type(link->lgr, SMC_LGR_SINGLE);
 
 	/* optional 2nd link, receive ADD LINK request from server */
 	qentry = smc_llc_wait(link->lgr, NULL, SMC_LLC_WAIT_TIME,
@@ -1037,8 +1036,6 @@ static int smcr_serv_conf_first_link(struct smc_sock *smc)
 	struct smc_llc_qentry *qentry;
 	int rc;
 
-	link->lgr->type = SMC_LGR_SINGLE;
-
 	if (smcr_link_reg_rmb(link, smc->conn.rmb_desc))
 		return SMC_CLC_DECL_ERR_REGRMB;
 
@@ -1067,6 +1064,7 @@ static int smcr_serv_conf_first_link(struct smc_sock *smc)
 	smc->conn.rmb_desc->is_conf_rkey = true;
 
 	smc_llc_link_active(link);
+	smcr_lgr_set_type(link->lgr, SMC_LGR_SINGLE);
 
 	/* initial contact - try to establish second link */
 	smc_llc_srv_add_link(link);