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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/*
* Copyright (C) 2012
* Sachin Bhamare <sbhamare@panasas.com>
* Boaz Harrosh <ooo@electrozaur.com>
*
* This file is part of exofs.
*
* exofs is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License 2 as published by
* the Free Software Foundation.
*
* exofs 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 exofs; if not, write to the:
* Free Software Foundation <licensing@fsf.org>
*/
#include <linux/kobject.h>
#include <linux/device.h>
#include "exofs.h"
struct odev_attr {
struct attribute attr;
ssize_t (*show)(struct exofs_dev *, char *);
ssize_t (*store)(struct exofs_dev *, const char *, size_t);
};
static ssize_t odev_attr_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
struct exofs_dev *edp = container_of(kobj, struct exofs_dev, ed_kobj);
struct odev_attr *a = container_of(attr, struct odev_attr, attr);
return a->show ? a->show(edp, buf) : 0;
}
static ssize_t odev_attr_store(struct kobject *kobj, struct attribute *attr,
const char *buf, size_t len)
{
struct exofs_dev *edp = container_of(kobj, struct exofs_dev, ed_kobj);
struct odev_attr *a = container_of(attr, struct odev_attr, attr);
return a->store ? a->store(edp, buf, len) : len;
}
static const struct sysfs_ops odev_attr_ops = {
.show = odev_attr_show,
.store = odev_attr_store,
};
static struct kset *exofs_kset;
static ssize_t osdname_show(struct exofs_dev *edp, char *buf)
{
struct osd_dev *odev = edp->ored.od;
const struct osd_dev_info *odi = osduld_device_info(odev);
return snprintf(buf, odi->osdname_len + 1, "%s", odi->osdname);
}
static ssize_t systemid_show(struct exofs_dev *edp, char *buf)
{
struct osd_dev *odev = edp->ored.od;
const struct osd_dev_info *odi = osduld_device_info(odev);
memcpy(buf, odi->systemid, odi->systemid_len);
return odi->systemid_len;
}
static ssize_t uri_show(struct exofs_dev *edp, char *buf)
{
return snprintf(buf, edp->urilen, "%s", edp->uri);
}
static ssize_t uri_store(struct exofs_dev *edp, const char *buf, size_t len)
{
uint8_t *new_uri;
edp->urilen = strlen(buf) + 1;
new_uri = krealloc(edp->uri, edp->urilen, GFP_KERNEL);
if (new_uri == NULL)
return -ENOMEM;
edp->uri = new_uri;
strncpy(edp->uri, buf, edp->urilen);
return edp->urilen;
}
#define OSD_ATTR(name, mode, show, store) \
static struct odev_attr odev_attr_##name = \
__ATTR(name, mode, show, store)
OSD_ATTR(osdname, S_IRUGO, osdname_show, NULL);
OSD_ATTR(systemid, S_IRUGO, systemid_show, NULL);
OSD_ATTR(uri, S_IRWXU, uri_show, uri_store);
static struct attribute *odev_attrs[] = {
&odev_attr_osdname.attr,
&odev_attr_systemid.attr,
&odev_attr_uri.attr,
NULL,
};
static struct kobj_type odev_ktype = {
.default_attrs = odev_attrs,
.sysfs_ops = &odev_attr_ops,
};
static struct kobj_type uuid_ktype = {
};
void exofs_sysfs_dbg_print(void)
{
#ifdef CONFIG_EXOFS_DEBUG
struct kobject *k_name, *k_tmp;
list_for_each_entry_safe(k_name, k_tmp, &exofs_kset->list, entry) {
printk(KERN_INFO "%s: name %s ref %d\n",
__func__, kobject_name(k_name),
(int)atomic_read(&k_name->kref.refcount));
}
#endif
}
/*
* This function removes all kobjects under exofs_kset
* At the end of it, exofs_kset kobject will have a refcount
* of 1 which gets decremented only on exofs module unload
*/
void exofs_sysfs_sb_del(struct exofs_sb_info *sbi)
{
struct kobject *k_name, *k_tmp;
struct kobject *s_kobj = &sbi->s_kobj;
list_for_each_entry_safe(k_name, k_tmp, &exofs_kset->list, entry) {
/* Remove all that are children of this SBI */
if (k_name->parent == s_kobj)
kobject_put(k_name);
}
kobject_put(s_kobj);
}
/*
* This function creates sysfs entries to hold the current exofs cluster
* instance (uniquely identified by osdname,pid tuple).
* This function gets called once per exofs mount instance.
*/
int exofs_sysfs_sb_add(struct exofs_sb_info *sbi,
struct exofs_dt_device_info *dt_dev)
{
struct kobject *s_kobj;
int retval = 0;
uint64_t pid = sbi->one_comp.obj.partition;
/* allocate new uuid dirent */
s_kobj = &sbi->s_kobj;
s_kobj->kset = exofs_kset;
retval = kobject_init_and_add(s_kobj, &uuid_ktype,
&exofs_kset->kobj, "%s_%llx", dt_dev->osdname, pid);
if (retval) {
EXOFS_ERR("ERROR: Failed to create sysfs entry for "
"uuid-%s_%llx => %d\n", dt_dev->osdname, pid, retval);
return -ENOMEM;
}
return 0;
}
int exofs_sysfs_odev_add(struct exofs_dev *edev, struct exofs_sb_info *sbi)
{
struct kobject *d_kobj;
int retval = 0;
/* create osd device group which contains following attributes
* osdname, systemid & uri
*/
d_kobj = &edev->ed_kobj;
d_kobj->kset = exofs_kset;
retval = kobject_init_and_add(d_kobj, &odev_ktype,
&sbi->s_kobj, "dev%u", edev->did);
if (retval) {
EXOFS_ERR("ERROR: Failed to create sysfs entry for "
"device dev%u\n", edev->did);
return retval;
}
return 0;
}
int exofs_sysfs_init(void)
{
exofs_kset = kset_create_and_add("exofs", NULL, fs_kobj);
if (!exofs_kset) {
EXOFS_ERR("ERROR: kset_create_and_add exofs failed\n");
return -ENOMEM;
}
return 0;
}
void exofs_sysfs_uninit(void)
{
kset_unregister(exofs_kset);
}
|
