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Commit 85a82392 authored by Sven Schuetz's avatar Sven Schuetz Committed by James Bottomley
Browse files

[SCSI] zfcp: Add port_state attribute to sysfs 



The sysfs attribute /sys/class/fc_host/hostX/port_state was not set by
zfcp so far.

Now, the appropriate members of the fc_function_template struct are
set during its initialziation. The first is a boolean to show the port
state. The second is a function pointer to the function
zfcp_get_host_port_state, which reads the port state from our adapter
status bits and calls fc_host_port_state with the approriate port
state afterwards.

Signed-off-by: default avatarSven Schuetz <sven@linux.vnet.ibm.com>
Signed-off-by: default avatarChristof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
parent 553448f6

drivers/s390/scsi/zfcp_scsi.c

+19 −0
Original line number Diff line number Diff line
@@ -704,6 +704,23 @@ zfcp_reset_fc_host_stats(struct Scsi_Host *shost) 
	}

}



static void zfcp_get_host_port_state(struct Scsi_Host *shost)

{

	struct zfcp_adapter *adapter =

		(struct zfcp_adapter *)shost->hostdata[0];

	int status = atomic_read(&adapter->status);



	if ((status & ZFCP_STATUS_COMMON_RUNNING) &&

	    !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))

		fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;

	else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)

		fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;

	else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)

		fc_host_port_state(shost) = FC_PORTSTATE_ERROR;

	else

		fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;

}



static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)

{

	rport->dev_loss_tmo = timeout;
@@ -726,6 +743,8 @@ struct fc_function_template zfcp_transport_functions = { 
	.get_fc_host_stats = zfcp_get_fc_host_stats,

	.reset_fc_host_stats = zfcp_reset_fc_host_stats,

	.set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,

	.get_host_port_state = zfcp_get_host_port_state,

	.show_host_port_state = 1,

	/* no functions registered for following dynamic attributes but

	   directly set by LLDD */

	.show_host_port_type = 1,