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: 1.25 $"
33 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
36 * zfcp_sysfs_unit_release - gets called when a struct device unit is released
37 * @dev: pointer to belonging device
40 zfcp_sysfs_unit_release(struct device *dev)
46 * ZFCP_DEFINE_UNIT_ATTR
47 * @_name: name of show attribute
48 * @_format: format string
49 * @_value: value to print
51 * Generates attribute for a unit.
53 #define ZFCP_DEFINE_UNIT_ATTR(_name, _format, _value) \
54 static ssize_t zfcp_sysfs_unit_##_name##_show(struct device *dev, \
57 struct zfcp_unit *unit; \
59 unit = dev_get_drvdata(dev); \
60 return sprintf(buf, _format, _value); \
63 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_unit_##_name##_show, NULL);
65 ZFCP_DEFINE_UNIT_ATTR(status, "0x%08x\n", atomic_read(&unit->status));
66 ZFCP_DEFINE_UNIT_ATTR(scsi_lun, "0x%x\n", unit->scsi_lun);
69 * zfcp_sysfs_unit_failed_store - failed state of unit
70 * @dev: pointer to belonging device
71 * @buf: pointer to input buffer
72 * @count: number of bytes in buffer
74 * Store function of the "failed" attribute of a unit.
75 * If a "0" gets written to "failed", error recovery will be
76 * started for the belonging unit.
79 zfcp_sysfs_unit_failed_store(struct device *dev, const char *buf, size_t count)
81 struct zfcp_unit *unit;
86 down(&zfcp_data.config_sema);
87 unit = dev_get_drvdata(dev);
88 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status)) {
93 val = simple_strtoul(buf, &endp, 0);
94 if (((endp + 1) < (buf + count)) || (val != 0)) {
99 zfcp_erp_modify_unit_status(unit, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
100 zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED);
101 zfcp_erp_wait(unit->port->adapter);
103 up(&zfcp_data.config_sema);
104 return retval ? retval : count;
108 * zfcp_sysfs_unit_failed_show - failed state of unit
109 * @dev: pointer to belonging device
110 * @buf: pointer to input buffer
112 * Show function of "failed" attribute of unit. Will be
113 * "0" if unit is working, otherwise "1".
116 zfcp_sysfs_unit_failed_show(struct device *dev, char *buf)
118 struct zfcp_unit *unit;
120 unit = dev_get_drvdata(dev);
121 if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status))
122 return sprintf(buf, "1\n");
124 return sprintf(buf, "0\n");
127 static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_unit_failed_show,
128 zfcp_sysfs_unit_failed_store);
131 * zfcp_sysfs_unit_in_recovery_show - recovery state of unit
132 * @dev: pointer to belonging device
133 * @buf: pointer to input buffer
135 * Show function of "in_recovery" attribute of unit. Will be
136 * "0" if no error recovery is pending for unit, otherwise "1".
139 zfcp_sysfs_unit_in_recovery_show(struct device *dev, char *buf)
141 struct zfcp_unit *unit;
143 unit = dev_get_drvdata(dev);
144 if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status))
145 return sprintf(buf, "1\n");
147 return sprintf(buf, "0\n");
150 static DEVICE_ATTR(in_recovery, S_IRUGO, zfcp_sysfs_unit_in_recovery_show,
153 static struct attribute *zfcp_unit_attrs[] = {
154 &dev_attr_scsi_lun.attr,
155 &dev_attr_failed.attr,
156 &dev_attr_in_recovery.attr,
157 &dev_attr_status.attr,
161 static struct attribute_group zfcp_unit_attr_group = {
162 .attrs = zfcp_unit_attrs,
166 * zfcp_sysfs_create_unit_files - create sysfs unit files
167 * @dev: pointer to belonging device
169 * Create all attributes of the sysfs representation of a unit.
172 zfcp_sysfs_unit_create_files(struct device *dev)
174 return sysfs_create_group(&dev->kobj, &zfcp_unit_attr_group);
178 * zfcp_sysfs_remove_unit_files - remove sysfs unit files
179 * @dev: pointer to belonging device
181 * Remove all attributes of the sysfs representation of a unit.
184 zfcp_sysfs_unit_remove_files(struct device *dev)
186 sysfs_remove_group(&dev->kobj, &zfcp_unit_attr_group);