Some SAS driver have an I_T_nexus_loss setting, which works
similar to the 'dev_loss_tmo' setting on FibreChannel.
So update it with the current values, too.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
libmultipath/discovery.c | 51 +++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 48 insertions(+), 3 deletions(-)
diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
index a099996..65f9c57 100644
--- a/libmultipath/discovery.c
+++ b/libmultipath/discovery.c
@@ -215,9 +215,21 @@ sysfs_get_tgt_nodename (struct path *pp, char * node)
/* Check for SAS */
value = udev_device_get_sysattr_value(parent, "sas_address");
if (value) {
- pp->sg_id.proto_id = SCSI_PROTOCOL_SAS;
- strncpy(node, value, NODE_NAME_SIZE);
- return 0;
+ tgtdev = udev_device_get_parent(parent);
+ while (tgtdev) {
+ targetid = udev_device_get_sysname(tgtdev);
+ if (sscanf(targetid, "end_device-%d:%d",
+ &host, &rport_id) == 2)
+ break;
+ tgtdev = udev_device_get_parent(tgtdev);
+ rport_id = -1;
+ }
+ if (rport_id >= 0) {
+ pp->sg_id.proto_id = SCSI_PROTOCOL_SAS;
+ pp->sg_id.transport_id = rport_id;
+ strncpy(node, value, NODE_NAME_SIZE);
+ return 0;
+ }
}
parent = udev_device_get_parent_with_subsystem_devtype(pp->udev, "scsi", "scsi_target");
@@ -391,6 +403,37 @@ sysfs_set_session_tmo(struct multipath *mpp, struct path *pp)
return;
}
+static void
+sysfs_set_nexus_loss_tmo(struct multipath *mpp, struct path *pp)
+{
+ struct udev_device *sas_dev = NULL;
+ char end_dev_id[64];
+ char value[11];
+
+ sprintf(end_dev_id, "end_device-%d:%d",
+ pp->sg_id.host_no, pp->sg_id.transport_id);
+ sas_dev = udev_device_new_from_subsystem_sysname(conf->udev,
+ "sas_end_device", end_dev_id);
+ if (!sas_dev) {
+ condlog(1, "%s: No SAS end device for '%s'", pp->dev,
+ end_dev_id);
+ return;
+ }
+ condlog(4, "target%d:%d:%d -> %s", pp->sg_id.host_no,
+ pp->sg_id.channel, pp->sg_id.scsi_id, end_dev_id);
+
+ if (mpp->dev_loss) {
+ snprintf(value, 11, "%u", mpp->dev_loss);
+ if (sysfs_attr_set_value(sas_dev, "I_T_nexus_loss_timeout",
+ value, 11) <= 0)
+ condlog(3, "%s: failed to update "
+ "I_T Nexus loss timeout, error %d",
+ pp->dev, errno);
+ }
+ udev_device_unref(sas_dev);
+ return;
+}
+
int
sysfs_set_scsi_tmo (struct multipath *mpp)
{
@@ -426,6 +469,8 @@ sysfs_set_scsi_tmo (struct multipath *mpp)
sysfs_set_rport_tmo(mpp, pp);
if (pp->sg_id.proto_id == SCSI_PROTOCOL_ISCSI)
sysfs_set_session_tmo(mpp, pp);
+ if (pp->sg_id.proto_id == SCSI_PROTOCOL_SAS)
+ sysfs_set_nexus_loss_tmo(mpp, pp);
}
return 0;
}
--
1.7.4.2
--
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