2 * This file is part of the zfcp device driver for
3 * FCP adapters for IBM System z9 and zSeries.
5 * (C) Copyright IBM Corp. 2002, 2006
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
27 * zfcp_sysfs_port_release - gets called when a struct device port is released
28 * @dev: pointer to belonging device
31 zfcp_sysfs_port_release(struct device *dev)
37 * ZFCP_DEFINE_PORT_ATTR
38 * @_name: name of show attribute
39 * @_format: format string
40 * @_value: value to print
42 * Generates attributes for a port.
44 #define ZFCP_DEFINE_PORT_ATTR(_name, _format, _value) \
45 static ssize_t zfcp_sysfs_port_##_name##_show(struct device *dev, struct device_attribute *attr, \
48 struct zfcp_port *port; \
50 port = dev_get_drvdata(dev); \
51 return sprintf(buf, _format, _value); \
54 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_port_##_name##_show, NULL);
56 ZFCP_DEFINE_PORT_ATTR(status, "0x%08x\n", atomic_read(&port->status));
57 ZFCP_DEFINE_PORT_ATTR(in_recovery, "%d\n", atomic_test_mask
58 (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status));
59 ZFCP_DEFINE_PORT_ATTR(access_denied, "%d\n", atomic_test_mask
60 (ZFCP_STATUS_COMMON_ACCESS_DENIED, &port->status));
63 * zfcp_sysfs_unit_add_store - add a unit to sysfs tree
64 * @dev: pointer to belonging device
65 * @buf: pointer to input buffer
66 * @count: number of bytes in buffer
68 * Store function of the "unit_add" attribute of a port.
71 zfcp_sysfs_unit_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
75 struct zfcp_port *port;
76 struct zfcp_unit *unit;
79 down(&zfcp_data.config_sema);
81 port = dev_get_drvdata(dev);
82 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
87 fcp_lun = simple_strtoull(buf, &endp, 0);
88 if ((endp + 1) < (buf + count))
91 unit = zfcp_unit_enqueue(port, fcp_lun);
97 zfcp_erp_unit_reopen(unit, 0);
98 zfcp_erp_wait(unit->port->adapter);
101 up(&zfcp_data.config_sema);
102 return retval ? retval : (ssize_t) count;
105 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
108 * zfcp_sysfs_unit_remove_store - remove a unit from sysfs tree
109 * @dev: pointer to belonging device
110 * @buf: pointer to input buffer
111 * @count: number of bytes in buffer
114 zfcp_sysfs_unit_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
116 struct zfcp_port *port;
117 struct zfcp_unit *unit;
122 down(&zfcp_data.config_sema);
124 port = dev_get_drvdata(dev);
125 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
130 fcp_lun = simple_strtoull(buf, &endp, 0);
131 if ((endp + 1) < (buf + count)) {
136 write_lock_irq(&zfcp_data.config_lock);
137 unit = zfcp_get_unit_by_lun(port, fcp_lun);
138 if (unit && (atomic_read(&unit->refcount) == 0)) {
140 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
141 list_move(&unit->list, &port->unit_remove_lh);
146 write_unlock_irq(&zfcp_data.config_lock);
153 zfcp_erp_unit_shutdown(unit, 0);
154 zfcp_erp_wait(unit->port->adapter);
156 zfcp_unit_dequeue(unit);
158 up(&zfcp_data.config_sema);
159 return retval ? retval : (ssize_t) count;
162 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
165 * zfcp_sysfs_port_failed_store - failed state of port
166 * @dev: pointer to belonging device
167 * @buf: pointer to input buffer
168 * @count: number of bytes in buffer
170 * Store function of the "failed" attribute of a port.
171 * If a "0" gets written to "failed", error recovery will be
172 * started for the belonging port.
175 zfcp_sysfs_port_failed_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
177 struct zfcp_port *port;
182 down(&zfcp_data.config_sema);
184 port = dev_get_drvdata(dev);
185 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
190 val = simple_strtoul(buf, &endp, 0);
191 if (((endp + 1) < (buf + count)) || (val != 0)) {
196 zfcp_erp_modify_port_status(port, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
197 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED);
198 zfcp_erp_wait(port->adapter);
200 up(&zfcp_data.config_sema);
201 return retval ? retval : (ssize_t) count;
205 * zfcp_sysfs_port_failed_show - failed state of port
206 * @dev: pointer to belonging device
207 * @buf: pointer to input buffer
209 * Show function of "failed" attribute of port. Will be
210 * "0" if port is working, otherwise "1".
213 zfcp_sysfs_port_failed_show(struct device *dev, struct device_attribute *attr, char *buf)
215 struct zfcp_port *port;
217 port = dev_get_drvdata(dev);
218 if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status))
219 return sprintf(buf, "1\n");
221 return sprintf(buf, "0\n");
224 static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_port_failed_show,
225 zfcp_sysfs_port_failed_store);
228 * zfcp_port_common_attrs
229 * sysfs attributes that are common for all kind of fc ports.
231 static struct attribute *zfcp_port_common_attrs[] = {
232 &dev_attr_failed.attr,
233 &dev_attr_in_recovery.attr,
234 &dev_attr_status.attr,
235 &dev_attr_access_denied.attr,
239 static struct attribute_group zfcp_port_common_attr_group = {
240 .attrs = zfcp_port_common_attrs,
244 * zfcp_port_no_ns_attrs
245 * sysfs attributes not to be used for nameserver ports.
247 static struct attribute *zfcp_port_no_ns_attrs[] = {
248 &dev_attr_unit_add.attr,
249 &dev_attr_unit_remove.attr,
253 static struct attribute_group zfcp_port_no_ns_attr_group = {
254 .attrs = zfcp_port_no_ns_attrs,
258 * zfcp_sysfs_port_create_files - create sysfs port files
259 * @dev: pointer to belonging device
261 * Create all attributes of the sysfs representation of a port.
264 zfcp_sysfs_port_create_files(struct device *dev, u32 flags)
268 retval = sysfs_create_group(&dev->kobj, &zfcp_port_common_attr_group);
270 if ((flags & ZFCP_STATUS_PORT_WKA) || retval)
273 retval = sysfs_create_group(&dev->kobj, &zfcp_port_no_ns_attr_group);
275 sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group);
281 * zfcp_sysfs_port_remove_files - remove sysfs port files
282 * @dev: pointer to belonging device
284 * Remove all attributes of the sysfs representation of a port.
287 zfcp_sysfs_port_remove_files(struct device *dev, u32 flags)
289 sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group);
290 if (!(flags & ZFCP_STATUS_PORT_WKA))
291 sysfs_remove_group(&dev->kobj, &zfcp_port_no_ns_attr_group);