From 0d81b4e8dcc4177726f30a1ac8df1f726d2a7c0c Mon Sep 17 00:00:00 2001 From: Christof Schmitt Date: Wed, 8 Dec 2010 17:30:46 +0100 Subject: [SCSI] zfcp: Add allow_lun_scan module parameter The zfcpdump tool requires a method to attach exactly one LUN. The easiest way to achieve this is to add a new zfcp module parameter. When allow_lun_scan is set to "false", zfcp only accepts LUNs that have been configured through the unit_add sysfs interface. Reviewed-by: Swen Schillig Signed-off-by: Christof Schmitt Signed-off-by: James Bottomley --- drivers/s390/scsi/zfcp_scsi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c index 59a653d15a19..ddb5800823a9 100644 --- a/drivers/s390/scsi/zfcp_scsi.c +++ b/drivers/s390/scsi/zfcp_scsi.c @@ -30,6 +30,10 @@ module_param_named(dif, enable_dif, bool, 0600); MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support"); #endif +static bool allow_lun_scan = 1; +module_param(allow_lun_scan, bool, 0600); +MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs"); + static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth, int reason) { @@ -130,6 +134,7 @@ static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); struct zfcp_port *port; struct zfcp_unit *unit; + int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE; port = zfcp_get_port_by_wwpn(adapter, rport->port_name); if (!port) @@ -139,7 +144,7 @@ static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) if (unit) put_device(&unit->dev); - if (!unit && !(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) { + if (!unit && !(allow_lun_scan && npiv)) { put_device(&port->dev); return -ENXIO; } -- cgit v1.2.3