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>
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.
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, struct device_attribute *attr, \
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(in_recovery, "%d\n", atomic_test_mask
67 (ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status));
68 ZFCP_DEFINE_UNIT_ATTR(access_denied, "%d\n", atomic_test_mask
69 (ZFCP_STATUS_COMMON_ACCESS_DENIED, &unit->status));
70 ZFCP_DEFINE_UNIT_ATTR(access_shared, "%d\n", atomic_test_mask
71 (ZFCP_STATUS_UNIT_SHARED, &unit->status));
72 ZFCP_DEFINE_UNIT_ATTR(access_readonly, "%d\n", atomic_test_mask
73 (ZFCP_STATUS_UNIT_READONLY, &unit->status));
76 * zfcp_sysfs_unit_failed_store - failed state of unit
77 * @dev: pointer to belonging device
78 * @buf: pointer to input buffer
79 * @count: number of bytes in buffer
81 * Store function of the "failed" attribute of a unit.
82 * If a "0" gets written to "failed", error recovery will be
83 * started for the belonging unit.
86 zfcp_sysfs_unit_failed_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
88 struct zfcp_unit *unit;
93 down(&zfcp_data.config_sema);
94 unit = dev_get_drvdata(dev);
95 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status)) {
100 val = simple_strtoul(buf, &endp, 0);
101 if (((endp + 1) < (buf + count)) || (val != 0)) {
106 zfcp_erp_modify_unit_status(unit, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
107 zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED);
108 zfcp_erp_wait(unit->port->adapter);
110 up(&zfcp_data.config_sema);
111 return retval ? retval : (ssize_t) count;
115 * zfcp_sysfs_unit_failed_show - failed state of unit
116 * @dev: pointer to belonging device
117 * @buf: pointer to input buffer
119 * Show function of "failed" attribute of unit. Will be
120 * "0" if unit is working, otherwise "1".
123 zfcp_sysfs_unit_failed_show(struct device *dev, struct device_attribute *attr, char *buf)
125 struct zfcp_unit *unit;
127 unit = dev_get_drvdata(dev);
128 if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status))
129 return sprintf(buf, "1\n");
131 return sprintf(buf, "0\n");
134 static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_unit_failed_show,
135 zfcp_sysfs_unit_failed_store);
137 static struct attribute *zfcp_unit_attrs[] = {
138 &dev_attr_failed.attr,
139 &dev_attr_in_recovery.attr,
140 &dev_attr_status.attr,
141 &dev_attr_access_denied.attr,
142 &dev_attr_access_shared.attr,
143 &dev_attr_access_readonly.attr,
147 static struct attribute_group zfcp_unit_attr_group = {
148 .attrs = zfcp_unit_attrs,
152 * zfcp_sysfs_create_unit_files - create sysfs unit files
153 * @dev: pointer to belonging device
155 * Create all attributes of the sysfs representation of a unit.
158 zfcp_sysfs_unit_create_files(struct device *dev)
160 return sysfs_create_group(&dev->kobj, &zfcp_unit_attr_group);
164 * zfcp_sysfs_remove_unit_files - remove sysfs unit files
165 * @dev: pointer to belonging device
167 * Remove all attributes of the sysfs representation of a unit.
170 zfcp_sysfs_unit_remove_files(struct device *dev)
172 sysfs_remove_group(&dev->kobj, &zfcp_unit_attr_group);