Commit 2f7a91d2 authored by Steffen Maier's avatar Steffen Maier Committed by Ben Hutchings

zfcp: fix fc_host port_type with NPIV

commit bd77befa upstream.

For an NPIV-enabled FCP device, zfcp can erroneously show
"NPort (fabric via point-to-point)" instead of "NPIV VPORT"
for the port_type sysfs attribute of the corresponding
fc_host.
s390-tools that can be affected are dbginfo.sh and ziomon.

zfcp_fsf_exchange_config_evaluate() ignores
fsf_qtcb_bottom_config.connection_features indicating NPIV
and only sets fc_host_port_type to FC_PORTTYPE_NPORT if
fsf_qtcb_bottom_config.fc_topology is FSF_TOPO_FABRIC.

Only the independent zfcp_fsf_exchange_port_evaluate()
evaluates connection_features to overwrite fc_host_port_type
to FC_PORTTYPE_NPIV in case of NPIV.
Code was introduced with upstream kernel 2.6.30
commit 0282985d
("[SCSI] zfcp: Report fc_host_port_type as NPIV").

This works during FCP device recovery (such as set online)
because it performs FSF_QTCB_EXCHANGE_CONFIG_DATA followed by
FSF_QTCB_EXCHANGE_PORT_DATA in sequence.

However, the zfcp-specific scsi host sysfs attributes
"requests", "megabytes", or "seconds_active" trigger only
zfcp_fsf_exchange_config_evaluate() resetting fc_host
port_type to FC_PORTTYPE_NPORT despite NPIV.

The zfcp-specific scsi host sysfs attribute "utilization"
triggers only zfcp_fsf_exchange_port_evaluate() correcting
the fc_host port_type again in case of NPIV.

Evaluate fsf_qtcb_bottom_config.connection_features
in zfcp_fsf_exchange_config_evaluate() where it belongs to.
Signed-off-by: default avatarSteffen Maier <maier@linux.vnet.ibm.com>
Fixes: 0282985d ("[SCSI] zfcp: Report fc_host_port_type as NPIV")
Reviewed-by: default avatarBenjamin Block <bblock@linux.vnet.ibm.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
parent ef70fd11
......@@ -3,7 +3,7 @@
*
* Implementation of FSF commands.
*
* Copyright IBM Corp. 2002, 2013
* Copyright IBM Corp. 2002, 2015
*/
#define KMSG_COMPONENT "zfcp"
......@@ -508,7 +508,10 @@ static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
fc_host_port_type(shost) = FC_PORTTYPE_PTP;
break;
case FSF_TOPO_FABRIC:
fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
if (bottom->connection_features & FSF_FEATURE_NPIV_MODE)
fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
else
fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
break;
case FSF_TOPO_AL:
fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
......@@ -613,7 +616,6 @@ static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
fc_host_permanent_port_name(shost) = bottom->wwpn;
fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
} else
fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
......
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