diff options
| author | Hannes Reinecke <hare@suse.de> | 2016-03-17 10:39:45 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-04-11 23:57:09 +0300 |
| commit | 1d64508810d8d15867251c75a68d7250278ce2bd (patch) | |
| tree | a7f43abdbf163aad5545eeea1d3b840c4adb2954 /drivers/scsi/scsi_transport_iscsi.c | |
| parent | 216fad91387aab7c9e69fe0854d843f012968748 (diff) | |
| download | linux-1d64508810d8d15867251c75a68d7250278ce2bd.tar.xz | |
scsi: disable automatic target scan
On larger installations it is useful to disable automatic LUN scanning,
and only add the required LUNs via udev rules. This can speed up bootup
dramatically.
This patch introduces a new scan module parameter value 'manual', which
works like 'none', but can be overridden by setting the 'rescan' value
from scsi_scan_target to 'SCSI_SCAN_MANUAL'. And it updates all
relevant callers to set the 'rescan' value to 'SCSI_SCAN_MANUAL' if
invoked via the 'scan' option in sysfs.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Tested-by: Laurence Oberman <loberman@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_transport_iscsi.c')
| -rw-r--r-- | drivers/scsi/scsi_transport_iscsi.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index 441481623fb9..7a759a9257ea 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -1783,6 +1783,7 @@ struct iscsi_scan_data { unsigned int channel; unsigned int id; u64 lun; + enum scsi_scan_mode rescan; }; static int iscsi_user_scan_session(struct device *dev, void *data) @@ -1819,7 +1820,7 @@ static int iscsi_user_scan_session(struct device *dev, void *data) (scan_data->id == SCAN_WILD_CARD || scan_data->id == id)) scsi_scan_target(&session->dev, 0, id, - scan_data->lun, 1); + scan_data->lun, scan_data->rescan); } user_scan_exit: @@ -1836,6 +1837,7 @@ static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, scan_data.channel = channel; scan_data.id = id; scan_data.lun = lun; + scan_data.rescan = SCSI_SCAN_MANUAL; return device_for_each_child(&shost->shost_gendev, &scan_data, iscsi_user_scan_session); @@ -1852,6 +1854,7 @@ static void iscsi_scan_session(struct work_struct *work) scan_data.channel = 0; scan_data.id = SCAN_WILD_CARD; scan_data.lun = SCAN_WILD_CARD; + scan_data.rescan = SCSI_SCAN_RESCAN; iscsi_user_scan_session(&session->dev, &scan_data); atomic_dec(&ihost->nr_scans); |