s390/scsi/zfcp_unit.c

16  * @unit: The zfcp LUN/unit to register
22 void zfcp_unit_scsi_scan(struct zfcp_unit *unit)
24 	struct fc_rport *rport = unit->port->rport;
27 	lun = scsilun_to_int((struct scsi_lun *) &unit->fcp_lun);
36 	struct zfcp_unit *unit = container_of(work, struct zfcp_unit,
39 	zfcp_unit_scsi_scan(unit);
40 	put_device(&unit->dev);
55 	struct zfcp_unit *unit;
58 	list_for_each_entry(unit, &port->unit_list, list) {
59 		get_device(&unit->dev);
61 				    &unit->scsi_work) <= 0)
62 			put_device(&unit->dev);
69 	struct zfcp_unit *unit;
71 	list_for_each_entry(unit, &port->unit_list, list)
72 		if (unit->fcp_lun == fcp_lun) {
73 			get_device(&unit->dev);
74 			return unit;
82  * @port: zfcp_port where to look for the unit
93 	struct zfcp_unit *unit;
96 	unit = _zfcp_unit_find(port, fcp_lun);
98 	return unit;
107 	struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
109 	atomic_dec(&unit->port->units);
110 	kfree(unit);
114  * zfcp_unit_add - add unit to unit list of a port.
115  * @port: pointer to port where unit is added
116  * @fcp_lun: FCP LUN of unit to be added
119  * Sets up some unit internal structures and creates sysfs entry.
123 	struct zfcp_unit *unit;
133 	unit = zfcp_unit_find(port, fcp_lun);
134 	if (unit) {
135 		put_device(&unit->dev);
140 	unit = kzalloc(sizeof(struct zfcp_unit), GFP_KERNEL);
141 	if (!unit) {
146 	unit->port = port;
147 	unit->fcp_lun = fcp_lun;
148 	unit->dev.parent = &port->dev;
149 	unit->dev.release = zfcp_unit_release;
150 	unit->dev.groups = zfcp_unit_attr_groups;
151 	INIT_WORK(&unit->scsi_work, zfcp_unit_scsi_scan_work);
153 	if (dev_set_name(&unit->dev, "0x%016llx",
155 		kfree(unit);
160 	if (device_register(&unit->dev)) {
161 		put_device(&unit->dev);
169 	list_add_tail(&unit->list, &port->unit_list);
177 	zfcp_unit_scsi_scan(unit);
187  * @unit: The zfcp_unit where to get the SCSI device for
195 struct scsi_device *zfcp_unit_sdev(struct zfcp_unit *unit)
201 	lun = scsilun_to_int((struct scsi_lun *) &unit->fcp_lun);
202 	port = unit->port;
209  * @unit: The unit to lookup the SCSI device for
214 unsigned int zfcp_unit_sdev_status(struct zfcp_unit *unit)
220 	sdev = zfcp_unit_sdev(unit);
232  * @port: The port where to remove the unit from the configuration
233  * @fcp_lun: The 64 bit LUN of the unit to remove
235  * Returns: -EINVAL if a unit with the specified LUN does not exist,
240 	struct zfcp_unit *unit;
244 	unit = _zfcp_unit_find(port, fcp_lun);
245 	if (unit)
246 		list_del(&unit->list);
249 	if (!unit)
252 	sdev = zfcp_unit_sdev(unit);
258 	device_unregister(&unit->dev);
260 	put_device(&unit->dev); /* undo _zfcp_unit_find() */