2 * linux/drivers/s390/scsi/zfcp_sysfs_port.c
4 * FCP adapter driver for IBM eServer zSeries
6 * sysfs port related routines
8 * (C) Copyright IBM Corp. 2003, 2004
11 * Martin Peschke <mpeschke@de.ibm.com>
12 * Heiko Carstens <heiko.carstens@de.ibm.com>
13 * Andreas Herrmann <aherrman@de.ibm.com>
14 * Volker Sameske <sameske@de.ibm.com>
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2, or (at your option)
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
31 #define ZFCP_SYSFS_PORT_C_REVISION "$Revision: 1.47 $"
35 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
38 * zfcp_sysfs_port_release - gets called when a struct device port is released
39 * @dev: pointer to belonging device
42 zfcp_sysfs_port_release(struct device *dev)
48 * ZFCP_DEFINE_PORT_ATTR
49 * @_name: name of show attribute
50 * @_format: format string
51 * @_value: value to print
53 * Generates attributes for a port.
55 #define ZFCP_DEFINE_PORT_ATTR(_name, _format, _value) \
56 static ssize_t zfcp_sysfs_port_##_name##_show(struct device *dev, struct device_attribute *attr, \
59 struct zfcp_port *port; \
61 port = dev_get_drvdata(dev); \
62 return sprintf(buf, _format, _value); \
65 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_port_##_name##_show, NULL);
67 ZFCP_DEFINE_PORT_ATTR(status, "0x%08x\n", atomic_read(&port->status));
68 ZFCP_DEFINE_PORT_ATTR(wwnn, "0x%016llx\n", port->wwnn);
69 ZFCP_DEFINE_PORT_ATTR(d_id, "0x%06x\n", port->d_id);
70 ZFCP_DEFINE_PORT_ATTR(scsi_id, "0x%x\n", port->scsi_id);
71 ZFCP_DEFINE_PORT_ATTR(in_recovery, "%d\n", atomic_test_mask
72 (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status));
73 ZFCP_DEFINE_PORT_ATTR(access_denied, "%d\n", atomic_test_mask
74 (ZFCP_STATUS_COMMON_ACCESS_DENIED, &port->status));
77 * zfcp_sysfs_unit_add_store - add a unit to sysfs tree
78 * @dev: pointer to belonging device
79 * @buf: pointer to input buffer
80 * @count: number of bytes in buffer
82 * Store function of the "unit_add" attribute of a port.
85 zfcp_sysfs_unit_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
89 struct zfcp_port *port;
90 struct zfcp_unit *unit;
93 down(&zfcp_data.config_sema);
95 port = dev_get_drvdata(dev);
96 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
101 fcp_lun = simple_strtoull(buf, &endp, 0);
102 if ((endp + 1) < (buf + count))
105 unit = zfcp_unit_enqueue(port, fcp_lun);
111 zfcp_erp_unit_reopen(unit, 0);
112 zfcp_erp_wait(unit->port->adapter);
115 up(&zfcp_data.config_sema);
116 return retval ? retval : (ssize_t) count;
119 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
122 * zfcp_sysfs_unit_remove_store - remove a unit from sysfs tree
123 * @dev: pointer to belonging device
124 * @buf: pointer to input buffer
125 * @count: number of bytes in buffer
128 zfcp_sysfs_unit_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
130 struct zfcp_port *port;
131 struct zfcp_unit *unit;
136 down(&zfcp_data.config_sema);
138 port = dev_get_drvdata(dev);
139 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
144 fcp_lun = simple_strtoull(buf, &endp, 0);
145 if ((endp + 1) < (buf + count)) {
150 write_lock_irq(&zfcp_data.config_lock);
151 unit = zfcp_get_unit_by_lun(port, fcp_lun);
152 if (unit && (atomic_read(&unit->refcount) == 0)) {
154 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
155 list_move(&unit->list, &port->unit_remove_lh);
160 write_unlock_irq(&zfcp_data.config_lock);
167 zfcp_erp_unit_shutdown(unit, 0);
168 zfcp_erp_wait(unit->port->adapter);
170 zfcp_unit_dequeue(unit);
172 up(&zfcp_data.config_sema);
173 return retval ? retval : (ssize_t) count;
176 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
179 * zfcp_sysfs_port_failed_store - failed state of port
180 * @dev: pointer to belonging device
181 * @buf: pointer to input buffer
182 * @count: number of bytes in buffer
184 * Store function of the "failed" attribute of a port.
185 * If a "0" gets written to "failed", error recovery will be
186 * started for the belonging port.
189 zfcp_sysfs_port_failed_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
191 struct zfcp_port *port;
196 down(&zfcp_data.config_sema);
198 port = dev_get_drvdata(dev);
199 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
204 val = simple_strtoul(buf, &endp, 0);
205 if (((endp + 1) < (buf + count)) || (val != 0)) {
210 zfcp_erp_modify_port_status(port, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
211 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED);
212 zfcp_erp_wait(port->adapter);
214 up(&zfcp_data.config_sema);
215 return retval ? retval : (ssize_t) count;
219 * zfcp_sysfs_port_failed_show - failed state of port
220 * @dev: pointer to belonging device
221 * @buf: pointer to input buffer
223 * Show function of "failed" attribute of port. Will be
224 * "0" if port is working, otherwise "1".
227 zfcp_sysfs_port_failed_show(struct device *dev, struct device_attribute *attr, char *buf)
229 struct zfcp_port *port;
231 port = dev_get_drvdata(dev);
232 if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status))
233 return sprintf(buf, "1\n");
235 return sprintf(buf, "0\n");
238 static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_port_failed_show,
239 zfcp_sysfs_port_failed_store);
242 * zfcp_port_common_attrs
243 * sysfs attributes that are common for all kind of fc ports.
245 static struct attribute *zfcp_port_common_attrs[] = {
246 &dev_attr_failed.attr,
247 &dev_attr_in_recovery.attr,
248 &dev_attr_status.attr,
251 &dev_attr_access_denied.attr,
255 static struct attribute_group zfcp_port_common_attr_group = {
256 .attrs = zfcp_port_common_attrs,
260 * zfcp_port_no_ns_attrs
261 * sysfs attributes not to be used for nameserver ports.
263 static struct attribute *zfcp_port_no_ns_attrs[] = {
264 &dev_attr_unit_add.attr,
265 &dev_attr_unit_remove.attr,
266 &dev_attr_scsi_id.attr,
270 static struct attribute_group zfcp_port_no_ns_attr_group = {
271 .attrs = zfcp_port_no_ns_attrs,
275 * zfcp_sysfs_port_create_files - create sysfs port files
276 * @dev: pointer to belonging device
278 * Create all attributes of the sysfs representation of a port.
281 zfcp_sysfs_port_create_files(struct device *dev, u32 flags)
285 retval = sysfs_create_group(&dev->kobj, &zfcp_port_common_attr_group);
287 if ((flags & ZFCP_STATUS_PORT_WKA) || retval)
290 retval = sysfs_create_group(&dev->kobj, &zfcp_port_no_ns_attr_group);
292 sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group);
298 * zfcp_sysfs_port_remove_files - remove sysfs port files
299 * @dev: pointer to belonging device
301 * Remove all attributes of the sysfs representation of a port.
304 zfcp_sysfs_port_remove_files(struct device *dev, u32 flags)
306 sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group);
307 if (!(flags & ZFCP_STATUS_PORT_WKA))
308 sysfs_remove_group(&dev->kobj, &zfcp_port_no_ns_attr_group);