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>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #define ZFCP_SYSFS_PORT_C_REVISION "$Revision: 1.44 $"
33 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
36 * zfcp_sysfs_port_release - gets called when a struct device port is released
37 * @dev: pointer to belonging device
40 zfcp_sysfs_port_release(struct device *dev)
46 * ZFCP_DEFINE_PORT_ATTR
47 * @_name: name of show attribute
48 * @_format: format string
49 * @_value: value to print
51 * Generates attributes for a port.
53 #define ZFCP_DEFINE_PORT_ATTR(_name, _format, _value) \
54 static ssize_t zfcp_sysfs_port_##_name##_show(struct device *dev, \
57 struct zfcp_port *port; \
59 port = dev_get_drvdata(dev); \
60 return sprintf(buf, _format, _value); \
63 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_port_##_name##_show, NULL);
65 ZFCP_DEFINE_PORT_ATTR(status, "0x%08x\n", atomic_read(&port->status));
66 ZFCP_DEFINE_PORT_ATTR(wwnn, "0x%016llx\n", port->wwnn);
67 ZFCP_DEFINE_PORT_ATTR(d_id, "0x%06x\n", port->d_id);
68 ZFCP_DEFINE_PORT_ATTR(scsi_id, "0x%x\n", port->scsi_id);
69 ZFCP_DEFINE_PORT_ATTR(in_recovery, "%d\n", atomic_test_mask
70 (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status));
73 * zfcp_sysfs_unit_add_store - add a unit to sysfs tree
74 * @dev: pointer to belonging device
75 * @buf: pointer to input buffer
76 * @count: number of bytes in buffer
78 * Store function of the "unit_add" attribute of a port.
81 zfcp_sysfs_unit_add_store(struct device *dev, const char *buf, size_t count)
85 struct zfcp_port *port;
86 struct zfcp_unit *unit;
89 down(&zfcp_data.config_sema);
91 port = dev_get_drvdata(dev);
92 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
97 fcp_lun = simple_strtoull(buf, &endp, 0);
98 if ((endp + 1) < (buf + count))
101 unit = zfcp_unit_enqueue(port, fcp_lun);
107 zfcp_erp_unit_reopen(unit, 0);
108 zfcp_erp_wait(unit->port->adapter);
111 up(&zfcp_data.config_sema);
112 return retval ? retval : (ssize_t) count;
115 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
118 * zfcp_sysfs_unit_remove_store - remove a unit from sysfs tree
119 * @dev: pointer to belonging device
120 * @buf: pointer to input buffer
121 * @count: number of bytes in buffer
124 zfcp_sysfs_unit_remove_store(struct device *dev, const char *buf, size_t count)
126 struct zfcp_port *port;
127 struct zfcp_unit *unit;
132 down(&zfcp_data.config_sema);
134 port = dev_get_drvdata(dev);
135 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
140 fcp_lun = simple_strtoull(buf, &endp, 0);
141 if ((endp + 1) < (buf + count)) {
146 write_lock_irq(&zfcp_data.config_lock);
147 unit = zfcp_get_unit_by_lun(port, fcp_lun);
148 if (unit && (atomic_read(&unit->refcount) == 0)) {
150 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
151 list_move(&unit->list, &port->unit_remove_lh);
156 write_unlock_irq(&zfcp_data.config_lock);
163 zfcp_erp_unit_shutdown(unit, 0);
164 zfcp_erp_wait(unit->port->adapter);
166 zfcp_unit_dequeue(unit);
168 up(&zfcp_data.config_sema);
169 return retval ? retval : (ssize_t) count;
172 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
175 * zfcp_sysfs_port_failed_store - failed state of port
176 * @dev: pointer to belonging device
177 * @buf: pointer to input buffer
178 * @count: number of bytes in buffer
180 * Store function of the "failed" attribute of a port.
181 * If a "0" gets written to "failed", error recovery will be
182 * started for the belonging port.
185 zfcp_sysfs_port_failed_store(struct device *dev, const char *buf, size_t count)
187 struct zfcp_port *port;
192 down(&zfcp_data.config_sema);
194 port = dev_get_drvdata(dev);
195 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
200 val = simple_strtoul(buf, &endp, 0);
201 if (((endp + 1) < (buf + count)) || (val != 0)) {
206 zfcp_erp_modify_port_status(port, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
207 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED);
208 zfcp_erp_wait(port->adapter);
210 up(&zfcp_data.config_sema);
211 return retval ? retval : (ssize_t) count;
215 * zfcp_sysfs_port_failed_show - failed state of port
216 * @dev: pointer to belonging device
217 * @buf: pointer to input buffer
219 * Show function of "failed" attribute of port. Will be
220 * "0" if port is working, otherwise "1".
223 zfcp_sysfs_port_failed_show(struct device *dev, char *buf)
225 struct zfcp_port *port;
227 port = dev_get_drvdata(dev);
228 if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status))
229 return sprintf(buf, "1\n");
231 return sprintf(buf, "0\n");
234 static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_port_failed_show,
235 zfcp_sysfs_port_failed_store);
238 * zfcp_port_common_attrs
239 * sysfs attributes that are common for all kind of fc ports.
241 static struct attribute *zfcp_port_common_attrs[] = {
242 &dev_attr_failed.attr,
243 &dev_attr_in_recovery.attr,
244 &dev_attr_status.attr,
250 static struct attribute_group zfcp_port_common_attr_group = {
251 .attrs = zfcp_port_common_attrs,
255 * zfcp_port_no_ns_attrs
256 * sysfs attributes not to be used for nameserver ports.
258 static struct attribute *zfcp_port_no_ns_attrs[] = {
259 &dev_attr_unit_add.attr,
260 &dev_attr_unit_remove.attr,
261 &dev_attr_scsi_id.attr,
265 static struct attribute_group zfcp_port_no_ns_attr_group = {
266 .attrs = zfcp_port_no_ns_attrs,
270 * zfcp_sysfs_port_create_files - create sysfs port files
271 * @dev: pointer to belonging device
273 * Create all attributes of the sysfs representation of a port.
276 zfcp_sysfs_port_create_files(struct device *dev, u32 flags)
280 retval = sysfs_create_group(&dev->kobj, &zfcp_port_common_attr_group);
282 if ((flags & ZFCP_STATUS_PORT_WKA) || retval)
285 retval = sysfs_create_group(&dev->kobj, &zfcp_port_no_ns_attr_group);
287 sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group);
293 * zfcp_sysfs_port_remove_files - remove sysfs port files
294 * @dev: pointer to belonging device
296 * Remove all attributes of the sysfs representation of a port.
299 zfcp_sysfs_port_remove_files(struct device *dev, u32 flags)
301 sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group);
302 if (!(flags & ZFCP_STATUS_PORT_WKA))
303 sysfs_remove_group(&dev->kobj, &zfcp_port_no_ns_attr_group);