2 * linux/drivers/s390/scsi/zfcp_sysfs_unit.c
4 * FCP adapter driver for IBM eServer zSeries
6 * sysfs unit 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_UNIT_C_REVISION "$Revision: 1.24 $"
31 #include <linux/init.h>
32 #include <linux/module.h>
33 #include <asm/ccwdev.h>
37 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
40 * zfcp_sysfs_unit_release - gets called when a struct device unit is released
41 * @dev: pointer to belonging device
44 zfcp_sysfs_unit_release(struct device *dev)
50 * ZFCP_DEFINE_UNIT_ATTR
51 * @_name: name of show attribute
52 * @_format: format string
53 * @_value: value to print
55 * Generates attribute for a unit.
57 #define ZFCP_DEFINE_UNIT_ATTR(_name, _format, _value) \
58 static ssize_t zfcp_sysfs_unit_##_name##_show(struct device *dev, \
61 struct zfcp_unit *unit; \
63 unit = dev_get_drvdata(dev); \
64 return sprintf(buf, _format, _value); \
67 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_unit_##_name##_show, NULL);
69 ZFCP_DEFINE_UNIT_ATTR(status, "0x%08x\n", atomic_read(&unit->status));
70 ZFCP_DEFINE_UNIT_ATTR(scsi_lun, "0x%x\n", unit->scsi_lun);
73 * zfcp_sysfs_unit_failed_store - failed state of unit
74 * @dev: pointer to belonging device
75 * @buf: pointer to input buffer
76 * @count: number of bytes in buffer
78 * Store function of the "failed" attribute of a unit.
79 * If a "0" gets written to "failed", error recovery will be
80 * started for the belonging unit.
83 zfcp_sysfs_unit_failed_store(struct device *dev, const char *buf, size_t count)
85 struct zfcp_unit *unit;
90 down(&zfcp_data.config_sema);
91 unit = dev_get_drvdata(dev);
92 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status)) {
97 val = simple_strtoul(buf, &endp, 0);
98 if (((endp + 1) < (buf + count)) || (val != 0)) {
103 zfcp_erp_modify_unit_status(unit, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
104 zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED);
105 zfcp_erp_wait(unit->port->adapter);
107 up(&zfcp_data.config_sema);
108 return retval ? retval : count;
112 * zfcp_sysfs_unit_failed_show - failed state of unit
113 * @dev: pointer to belonging device
114 * @buf: pointer to input buffer
116 * Show function of "failed" attribute of unit. Will be
117 * "0" if unit is working, otherwise "1".
120 zfcp_sysfs_unit_failed_show(struct device *dev, char *buf)
122 struct zfcp_unit *unit;
124 unit = dev_get_drvdata(dev);
125 if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status))
126 return sprintf(buf, "1\n");
128 return sprintf(buf, "0\n");
131 static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_unit_failed_show,
132 zfcp_sysfs_unit_failed_store);
135 * zfcp_sysfs_unit_in_recovery_show - recovery state of unit
136 * @dev: pointer to belonging device
137 * @buf: pointer to input buffer
139 * Show function of "in_recovery" attribute of unit. Will be
140 * "0" if no error recovery is pending for unit, otherwise "1".
143 zfcp_sysfs_unit_in_recovery_show(struct device *dev, char *buf)
145 struct zfcp_unit *unit;
147 unit = dev_get_drvdata(dev);
148 if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status))
149 return sprintf(buf, "1\n");
151 return sprintf(buf, "0\n");
154 static DEVICE_ATTR(in_recovery, S_IRUGO, zfcp_sysfs_unit_in_recovery_show,
157 static struct attribute *zfcp_unit_attrs[] = {
158 &dev_attr_scsi_lun.attr,
159 &dev_attr_failed.attr,
160 &dev_attr_in_recovery.attr,
161 &dev_attr_status.attr,
165 static struct attribute_group zfcp_unit_attr_group = {
166 .attrs = zfcp_unit_attrs,
170 * zfcp_sysfs_create_unit_files - create sysfs unit files
171 * @dev: pointer to belonging device
173 * Create all attributes of the sysfs representation of a unit.
176 zfcp_sysfs_unit_create_files(struct device *dev)
178 return sysfs_create_group(&dev->kobj, &zfcp_unit_attr_group);
182 * zfcp_sysfs_remove_unit_files - remove sysfs unit files
183 * @dev: pointer to belonging device
185 * Remove all attributes of the sysfs representation of a unit.
188 zfcp_sysfs_unit_remove_files(struct device *dev)
190 sysfs_remove_group(&dev->kobj, &zfcp_unit_attr_group);