aboutsummaryrefslogtreecommitdiff
path: root/drivers/s390/scsi/zfcp_sysfs_driver.c
blob: 77a5e2dcc0ff56002718943dc41d31fc608c9fb7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
/*
 * linux/drivers/s390/scsi/zfcp_sysfs_driver.c
 *
 * FCP adapter driver for IBM eServer zSeries
 *
 * sysfs driver related routines
 *
 * (C) Copyright IBM Corp. 2003, 2004
 *
 * Authors:
 *      Martin Peschke <mpeschke@de.ibm.com>
 *	Heiko Carstens <heiko.carstens@de.ibm.com>
 *      Andreas Herrmann <aherrman@de.ibm.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#define ZFCP_SYSFS_DRIVER_C_REVISION "$Revision: 1.17 $"

#include "zfcp_ext.h"

#define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_CONFIG

/**
 * ZFCP_DEFINE_DRIVER_ATTR - define for all loglevels sysfs attributes
 * @_name:       name of attribute
 * @_define:     name of ZFCP loglevel define
 *
 * Generates store function for a sysfs loglevel attribute of zfcp driver.
 */
#define ZFCP_DEFINE_DRIVER_ATTR(_name, _define)                               \
static ssize_t zfcp_sysfs_loglevel_##_name##_store(struct device_driver *drv, \
						   const char *buf,           \
						   size_t count)              \
{                                                                             \
	unsigned int loglevel;                                                \
	unsigned int new_loglevel;                                            \
	char *endp;                                                           \
                                                                              \
	new_loglevel = simple_strtoul(buf, &endp, 0);                         \
	if ((endp + 1) < (buf + count))                                       \
		return -EINVAL;                                               \
	if (new_loglevel > 3)                                                 \
		return -EINVAL;                                               \
	down(&zfcp_data.config_sema);                                         \
	loglevel = atomic_read(&zfcp_data.loglevel);                          \
	loglevel &= ~((unsigned int) 0xf << (ZFCP_LOG_AREA_##_define << 2));  \
	loglevel |= new_loglevel << (ZFCP_LOG_AREA_##_define << 2);           \
	atomic_set(&zfcp_data.loglevel, loglevel);                            \
	up(&zfcp_data.config_sema);                                           \
	return count;                                                         \
}                                                                             \
                                                                              \
static ssize_t zfcp_sysfs_loglevel_##_name##_show(struct device_driver *dev,  \
						  char *buf)                  \
{                                                                             \
	return sprintf(buf,"%d\n", (unsigned int)                             \
		       ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA_##_define));          \
}                                                                             \
                                                                              \
static DRIVER_ATTR(loglevel_##_name, S_IWUSR | S_IRUGO,                       \
		   zfcp_sysfs_loglevel_##_name##_show,                        \
		   zfcp_sysfs_loglevel_##_name##_store);

ZFCP_DEFINE_DRIVER_ATTR(other, OTHER);
ZFCP_DEFINE_DRIVER_ATTR(scsi, SCSI);
ZFCP_DEFINE_DRIVER_ATTR(fsf, FSF);
ZFCP_DEFINE_DRIVER_ATTR(config, CONFIG);
ZFCP_DEFINE_DRIVER_ATTR(cio, CIO);
ZFCP_DEFINE_DRIVER_ATTR(qdio, QDIO);
ZFCP_DEFINE_DRIVER_ATTR(erp, ERP);
ZFCP_DEFINE_DRIVER_ATTR(fc, FC);

static ssize_t zfcp_sysfs_version_show(struct device_driver *dev,
					      char *buf)
{
	return sprintf(buf, "%s\n", zfcp_data.driver_version);
}

static DRIVER_ATTR(version, S_IRUGO, zfcp_sysfs_version_show, NULL);

static struct attribute *zfcp_driver_attrs[] = {
	&driver_attr_loglevel_other.attr,
	&driver_attr_loglevel_scsi.attr,
	&driver_attr_loglevel_fsf.attr,
	&driver_attr_loglevel_config.attr,
	&driver_attr_loglevel_cio.attr,
	&driver_attr_loglevel_qdio.attr,
	&driver_attr_loglevel_erp.attr,
	&driver_attr_loglevel_fc.attr,
	&driver_attr_version.attr,
	NULL
};

static struct attribute_group zfcp_driver_attr_group = {
	.attrs = zfcp_driver_attrs,
};

/**
 * zfcp_sysfs_create_driver_files - create sysfs driver files
 * @dev: pointer to belonging device
 *
 * Create all sysfs attributes of the zfcp device driver
 */
int
zfcp_sysfs_driver_create_files(struct device_driver *drv)
{
	return sysfs_create_group(&drv->kobj, &zfcp_driver_attr_group);
}

/**
 * zfcp_sysfs_remove_driver_files - remove sysfs driver files
 * @dev: pointer to belonging device
 *
 * Remove all sysfs attributes of the zfcp device driver
 */
void
zfcp_sysfs_driver_remove_files(struct device_driver *drv)
{
	sysfs_remove_group(&drv->kobj, &zfcp_driver_attr_group);
}

#undef ZFCP_LOG_AREA