Merge master.kernel.org:/pub/scm/linux/kernel/git/chrisw/lsm-2.6
[linux-2.6] / drivers / s390 / scsi / zfcp_sysfs_driver.c
1 /*
2  * linux/drivers/s390/scsi/zfcp_sysfs_driver.c
3  *
4  * FCP adapter driver for IBM eServer zSeries
5  *
6  * sysfs driver related routines
7  *
8  * (C) Copyright IBM Corp. 2003, 2004
9  *
10  * Authors:
11  *      Martin Peschke <mpeschke@de.ibm.com>
12  *      Heiko Carstens <heiko.carstens@de.ibm.com>
13  *      Andreas Herrmann <aherrman@de.ibm.com>
14  *
15  * This program is free software; you can redistribute it and/or modify
16  * it under the terms of the GNU General Public License as published by
17  * the Free Software Foundation; either version 2, or (at your option)
18  * any later version.
19  *
20  * This program is distributed in the hope that it will be useful,
21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
23  * GNU General Public License for more details.
24  *
25  * You should have received a copy of the GNU General Public License
26  * along with this program; if not, write to the Free Software
27  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28  */
29
30 #define ZFCP_SYSFS_DRIVER_C_REVISION "$Revision: 1.17 $"
31
32 #include "zfcp_ext.h"
33
34 #define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_CONFIG
35
36 /**
37  * ZFCP_DEFINE_DRIVER_ATTR - define for all loglevels sysfs attributes
38  * @_name:       name of attribute
39  * @_define:     name of ZFCP loglevel define
40  *
41  * Generates store function for a sysfs loglevel attribute of zfcp driver.
42  */
43 #define ZFCP_DEFINE_DRIVER_ATTR(_name, _define)                               \
44 static ssize_t zfcp_sysfs_loglevel_##_name##_store(struct device_driver *drv, \
45                                                    const char *buf,           \
46                                                    size_t count)              \
47 {                                                                             \
48         unsigned int loglevel;                                                \
49         unsigned int new_loglevel;                                            \
50         char *endp;                                                           \
51                                                                               \
52         new_loglevel = simple_strtoul(buf, &endp, 0);                         \
53         if ((endp + 1) < (buf + count))                                       \
54                 return -EINVAL;                                               \
55         if (new_loglevel > 3)                                                 \
56                 return -EINVAL;                                               \
57         down(&zfcp_data.config_sema);                                         \
58         loglevel = atomic_read(&zfcp_data.loglevel);                          \
59         loglevel &= ~((unsigned int) 0xf << (ZFCP_LOG_AREA_##_define << 2));  \
60         loglevel |= new_loglevel << (ZFCP_LOG_AREA_##_define << 2);           \
61         atomic_set(&zfcp_data.loglevel, loglevel);                            \
62         up(&zfcp_data.config_sema);                                           \
63         return count;                                                         \
64 }                                                                             \
65                                                                               \
66 static ssize_t zfcp_sysfs_loglevel_##_name##_show(struct device_driver *dev,  \
67                                                   char *buf)                  \
68 {                                                                             \
69         return sprintf(buf,"%d\n", (unsigned int)                             \
70                        ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA_##_define));          \
71 }                                                                             \
72                                                                               \
73 static DRIVER_ATTR(loglevel_##_name, S_IWUSR | S_IRUGO,                       \
74                    zfcp_sysfs_loglevel_##_name##_show,                        \
75                    zfcp_sysfs_loglevel_##_name##_store);
76
77 ZFCP_DEFINE_DRIVER_ATTR(other, OTHER);
78 ZFCP_DEFINE_DRIVER_ATTR(scsi, SCSI);
79 ZFCP_DEFINE_DRIVER_ATTR(fsf, FSF);
80 ZFCP_DEFINE_DRIVER_ATTR(config, CONFIG);
81 ZFCP_DEFINE_DRIVER_ATTR(cio, CIO);
82 ZFCP_DEFINE_DRIVER_ATTR(qdio, QDIO);
83 ZFCP_DEFINE_DRIVER_ATTR(erp, ERP);
84 ZFCP_DEFINE_DRIVER_ATTR(fc, FC);
85
86 static ssize_t zfcp_sysfs_version_show(struct device_driver *dev,
87                                               char *buf)
88 {
89         return sprintf(buf, "%s\n", zfcp_data.driver_version);
90 }
91
92 static DRIVER_ATTR(version, S_IRUGO, zfcp_sysfs_version_show, NULL);
93
94 static struct attribute *zfcp_driver_attrs[] = {
95         &driver_attr_loglevel_other.attr,
96         &driver_attr_loglevel_scsi.attr,
97         &driver_attr_loglevel_fsf.attr,
98         &driver_attr_loglevel_config.attr,
99         &driver_attr_loglevel_cio.attr,
100         &driver_attr_loglevel_qdio.attr,
101         &driver_attr_loglevel_erp.attr,
102         &driver_attr_loglevel_fc.attr,
103         &driver_attr_version.attr,
104         NULL
105 };
106
107 static struct attribute_group zfcp_driver_attr_group = {
108         .attrs = zfcp_driver_attrs,
109 };
110
111 /**
112  * zfcp_sysfs_create_driver_files - create sysfs driver files
113  * @dev: pointer to belonging device
114  *
115  * Create all sysfs attributes of the zfcp device driver
116  */
117 int
118 zfcp_sysfs_driver_create_files(struct device_driver *drv)
119 {
120         return sysfs_create_group(&drv->kobj, &zfcp_driver_attr_group);
121 }
122
123 /**
124  * zfcp_sysfs_remove_driver_files - remove sysfs driver files
125  * @dev: pointer to belonging device
126  *
127  * Remove all sysfs attributes of the zfcp device driver
128  */
129 void
130 zfcp_sysfs_driver_remove_files(struct device_driver *drv)
131 {
132         sysfs_remove_group(&drv->kobj, &zfcp_driver_attr_group);
133 }
134
135 #undef ZFCP_LOG_AREA