On larger installations it makes sense to disable the target scan
per default on boot, and scan the required LUNs directly via udev
rules.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
drivers/scsi/scsi_transport_fc.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index 454cc28..72954a8 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -71,6 +71,18 @@ MODULE_PARM_DESC(dev_loss_tmo,
" fast_io_fail_tmo is not set.");
/*
+ * disable_target_scan: Disable target scan per default
+ * useful on larger installations where only a small
+ * number of LUNs are required for booting.
+ */
+static bool fc_disable_target_scan;
+
+module_param_named(disable_target_scan, fc_disable_target_scan,
+ bool, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(disable_target_scan,
+ "Disable target scan on remote ports (default=0)");
+
+/*
* Redefine so that we can have same named attributes in the
* sdev/starget/host objects.
*/
@@ -3282,10 +3294,14 @@ fc_scsi_scan_rport(struct work_struct *work)
struct Scsi_Host *shost = rport_to_shost(rport);
struct fc_internal *i = to_fc_internal(shost->transportt);
unsigned long flags;
+ bool disable_target_scan;
+
+ disable_target_scan = fc_disable_target_scan ?
+ fc_disable_target_scan : i->f->disable_target_scan;
if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
(rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
- !(i->f->disable_target_scan)) {
+ !disable_target_scan) {
scsi_scan_target(&rport->dev, rport->channel,
rport->scsi_target_id, SCAN_WILD_CARD, 1);
}
--
1.8.5.6
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