6b13f685e
 김민수
BSP 최초 추가
|
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
136
137
138
139
140
141
142
143
144
145
146
147
|
/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* configfs_macros.h - extends macros for configfs
*
* 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 of the License, 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., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*
* Based on sysfs:
* sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
*
* Based on kobject.h:
* Copyright (c) 2002-2003 Patrick Mochel
* Copyright (c) 2002-2003 Open Source Development Labs
*
* configfs Copyright (C) 2005 Oracle. All rights reserved.
*
* Added CONFIGFS_EATTR() macros from original configfs.h macros
* Copright (C) 2008-2009 Nicholas A. Bellinger <nab@linux-iscsi.org>
*
* Please read Documentation/filesystems/configfs/configfs.txt before using
* the configfs interface, ESPECIALLY the parts about reference counts and
* item destructors.
*/
#ifndef _CONFIGFS_MACROS_H_
#define _CONFIGFS_MACROS_H_
#include <linux/configfs.h>
/*
* Users often need to create attribute structures for their configurable
* attributes, containing a configfs_attribute member and function pointers
* for the show() and store() operations on that attribute. If they don't
* need anything else on the extended attribute structure, they can use
* this macro to define it. The argument _name isends up as
* 'struct _name_attribute, as well as names of to CONFIGFS_ATTR_OPS() below.
* The argument _item is the name of the structure containing the
* struct config_item or struct config_group structure members
*/
#define CONFIGFS_EATTR_STRUCT(_name, _item) \
struct _name##_attribute { \
struct configfs_attribute attr; \
ssize_t (*show)(struct _item *, char *); \
ssize_t (*store)(struct _item *, const char *, size_t); \
}
/*
* With the extended attribute structure, users can use this macro
* (similar to sysfs' __ATTR) to make defining attributes easier.
* An example:
* #define MYITEM_EATTR(_name, _mode, _show, _store) \
* struct myitem_attribute childless_attr_##_name = \
* __CONFIGFS_EATTR(_name, _mode, _show, _store)
*/
#define __CONFIGFS_EATTR(_name, _mode, _show, _store) \
{ \
.attr = { \
.ca_name = __stringify(_name), \
.ca_mode = _mode, \
.ca_owner = THIS_MODULE, \
}, \
.show = _show, \
.store = _store, \
}
/* Here is a readonly version, only requiring a show() operation */
#define __CONFIGFS_EATTR_RO(_name, _show) \
{ \
.attr = { \
.ca_name = __stringify(_name), \
.ca_mode = 0444, \
.ca_owner = THIS_MODULE, \
}, \
.show = _show, \
}
/*
* With these extended attributes, the simple show_attribute() and
* store_attribute() operations need to call the show() and store() of the
* attributes. This is a common pattern, so we provide a macro to define
* them. The argument _name is the name of the attribute defined by
* CONFIGFS_ATTR_STRUCT(). The argument _item is the name of the structure
* containing the struct config_item or struct config_group structure member.
* The argument _item_member is the actual name of the struct config_* struct
* in your _item structure. Meaning my_structure->some_config_group.
* ^^_item^^^^^ ^^_item_member^^^
* This macro expects the attributes to be named "struct <name>_attribute".
*/
#define CONFIGFS_EATTR_OPS_TO_FUNC(_name, _item, _item_member) \
static struct _item *to_##_name(struct config_item *ci) \
{ \
return (ci) ? container_of(to_config_group(ci), struct _item, \
_item_member) : NULL; \
}
#define CONFIGFS_EATTR_OPS_SHOW(_name, _item) \
static ssize_t _name##_attr_show(struct config_item *item, \
struct configfs_attribute *attr, \
char *page) \
{ \
struct _item *_item = to_##_name(item); \
struct _name##_attribute * _name##_attr = \
container_of(attr, struct _name##_attribute, attr); \
ssize_t ret = 0; \
\
if (_name##_attr->show) \
ret = _name##_attr->show(_item, page); \
return ret; \
}
#define CONFIGFS_EATTR_OPS_STORE(_name, _item) \
static ssize_t _name##_attr_store(struct config_item *item, \
struct configfs_attribute *attr, \
const char *page, size_t count) \
{ \
struct _item *_item = to_##_name(item); \
struct _name##_attribute * _name##_attr = \
container_of(attr, struct _name##_attribute, attr); \
ssize_t ret = -EINVAL; \
\
if (_name##_attr->store) \
ret = _name##_attr->store(_item, page, count); \
return ret; \
}
#define CONFIGFS_EATTR_OPS(_name, _item, _item_member) \
CONFIGFS_EATTR_OPS_TO_FUNC(_name, _item, _item_member); \
CONFIGFS_EATTR_OPS_SHOW(_name, _item); \
CONFIGFS_EATTR_OPS_STORE(_name, _item);
#define CONFIGFS_EATTR_OPS_RO(_name, _item, _item_member) \
CONFIGFS_EATTR_OPS_TO_FUNC(_name, _item, _item_member); \
CONFIGFS_EATTR_OPS_SHOW(_name, _item);
#endif /* _CONFIGFS_MACROS_H_ */
|