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authorChristof Schmitt <christof.schmitt@de.ibm.com>2010-12-08 17:30:46 +0100
committerJames Bottomley <James.Bottomley@suse.de>2010-12-21 19:24:48 +0100
commit0d81b4e8dcc4177726f30a1ac8df1f726d2a7c0c (patch)
treef8179d83b91478f07456d78981bf95dcd1c3dc5e /drivers/s390/scsi
parent[SCSI] zfcp: Add __init declaration to zfcp_cache_hw_align (diff)
downloadlinux-0d81b4e8dcc4177726f30a1ac8df1f726d2a7c0c.tar.xz
linux-0d81b4e8dcc4177726f30a1ac8df1f726d2a7c0c.zip
[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 <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/s390/scsi')
-rw-r--r--drivers/s390/scsi/zfcp_scsi.c7
1 files changed, 6 insertions, 1 deletions
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;
}