summaryrefslogtreecommitdiffstats
path: root/fs/gfs2/locking/dlm/sysfs.c
blob: 29ae06f949445c735fac49c62cb65f3aa090a9a5 (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
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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License version 2.
 */

#include <linux/ctype.h>
#include <linux/stat.h>

#include "lock_dlm.h"

extern struct lm_lockops gdlm_ops;

static ssize_t proto_name_show(struct gdlm_ls *ls, char *buf)
{
	return sprintf(buf, "%s\n", gdlm_ops.lm_proto_name);
}

static ssize_t block_show(struct gdlm_ls *ls, char *buf)
{
	ssize_t ret;
	int val = 0;

	if (test_bit(DFL_BLOCK_LOCKS, &ls->flags))
		val = 1;
	ret = sprintf(buf, "%d\n", val);
	return ret;
}

static ssize_t block_store(struct gdlm_ls *ls, const char *buf, size_t len)
{
	ssize_t ret = len;
	int val;

	val = simple_strtol(buf, NULL, 0);

	if (val == 1)
		set_bit(DFL_BLOCK_LOCKS, &ls->flags);
	else if (val == 0) {
		clear_bit(DFL_BLOCK_LOCKS, &ls->flags);
		gdlm_submit_delayed(ls);
	} else {
		ret = -EINVAL;
	}
	return ret;
}

static ssize_t withdraw_show(struct gdlm_ls *ls, char *buf)
{
	ssize_t ret;
	int val = 0;

	if (test_bit(DFL_WITHDRAW, &ls->flags))
		val = 1;
	ret = sprintf(buf, "%d\n", val);
	return ret;
}

static ssize_t withdraw_store(struct gdlm_ls *ls, const char *buf, size_t len)
{
	ssize_t ret = len;
	int val;

	val = simple_strtol(buf, NULL, 0);

	if (val == 1)
		set_bit(DFL_WITHDRAW, &ls->flags);
	else
		ret = -EINVAL;
	wake_up(&ls->wait_control);
	return ret;
}

static ssize_t id_show(struct gdlm_ls *ls, char *buf)
{
	return sprintf(buf, "%u\n", ls->id);
}

static ssize_t jid_show(struct gdlm_ls *ls, char *buf)
{
	return sprintf(buf, "%d\n", ls->jid);
}

static ssize_t first_show(struct gdlm_ls *ls, char *buf)
{
	return sprintf(buf, "%d\n", ls->first);
}

static ssize_t first_done_show(struct gdlm_ls *ls, char *buf)
{
	return sprintf(buf, "%d\n", ls->first_done);
}

static ssize_t recover_show(struct gdlm_ls *ls, char *buf)
{
	return sprintf(buf, "%d\n", ls->recover_jid);
}

static ssize_t recover_store(struct gdlm_ls *ls, const char *buf, size_t len)
{
	ls->recover_jid = simple_strtol(buf, NULL, 0);
	ls->fscb(ls->sdp, LM_CB_NEED_RECOVERY, &ls->recover_jid);
	return len;
}

static ssize_t recover_done_show(struct gdlm_ls *ls, char *buf)
{
	return sprintf(buf, "%d\n", ls->recover_jid_done);
}

static ssize_t recover_status_show(struct gdlm_ls *ls, char *buf)
{
	return sprintf(buf, "%d\n", ls->recover_jid_status);
}

struct gdlm_attr {
	struct attribute attr;
	ssize_t (*show)(struct gdlm_ls *, char *);
	ssize_t (*store)(struct gdlm_ls *, const char *, size_t);
};

#define GDLM_ATTR(_name,_mode,_show,_store) \
static struct gdlm_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)

GDLM_ATTR(proto_name,     0444, proto_name_show,     NULL);
GDLM_ATTR(block,          0644, block_show,          block_store);
GDLM_ATTR(withdraw,       0644, withdraw_show,       withdraw_store);
GDLM_ATTR(id,             0444, id_show,             NULL);
GDLM_ATTR(jid,            0444, jid_show,            NULL);
GDLM_ATTR(first,          0444, first_show,          NULL);
GDLM_ATTR(first_done,     0444, first_done_show,     NULL);
GDLM_ATTR(recover,        0644, recover_show,        recover_store);
GDLM_ATTR(recover_done,   0444, recover_done_show,   NULL);
GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);

static struct attribute *gdlm_attrs[] = {
	&gdlm_attr_proto_name.attr,
	&gdlm_attr_block.attr,
	&gdlm_attr_withdraw.attr,
	&gdlm_attr_id.attr,
	&gdlm_attr_jid.attr,
	&gdlm_attr_first.attr,
	&gdlm_attr_first_done.attr,
	&gdlm_attr_recover.attr,
	&gdlm_attr_recover_done.attr,
	&gdlm_attr_recover_status.attr,
	NULL,
};

static ssize_t gdlm_attr_show(struct kobject *kobj, struct attribute *attr,
			      char *buf)
{
	struct gdlm_ls *ls = container_of(kobj, struct gdlm_ls, kobj);
	struct gdlm_attr *a = container_of(attr, struct gdlm_attr, attr);
	return a->show ? a->show(ls, buf) : 0;
}

static ssize_t gdlm_attr_store(struct kobject *kobj, struct attribute *attr,
			       const char *buf, size_t len)
{
	struct gdlm_ls *ls = container_of(kobj, struct gdlm_ls, kobj);
	struct gdlm_attr *a = container_of(attr, struct gdlm_attr, attr);
	return a->store ? a->store(ls, buf, len) : len;
}

static struct sysfs_ops gdlm_attr_ops = {
	.show  = gdlm_attr_show,
	.store = gdlm_attr_store,
};

static struct kobj_type gdlm_ktype = {
	.default_attrs = gdlm_attrs,
	.sysfs_ops     = &gdlm_attr_ops,
};

static struct kset gdlm_kset = {
	.subsys = &kernel_subsys,
	.kobj   = {.name = "lock_dlm",},
	.ktype  = &gdlm_ktype,
};

int gdlm_kobject_setup(struct gdlm_ls *ls, struct kobject *fskobj)
{
	int error;

	error = kobject_set_name(&ls->kobj, "%s", "lock_module");
	if (error) {
		log_error("can't set kobj name %d", error);
		return error;
	}

	ls->kobj.kset = &gdlm_kset;
	ls->kobj.ktype = &gdlm_ktype;
	ls->kobj.parent = fskobj;

	error = kobject_register(&ls->kobj);
	if (error)
		log_error("can't register kobj %d", error);

	return error;
}

void gdlm_kobject_release(struct gdlm_ls *ls)
{
	kobject_unregister(&ls->kobj);
}

int gdlm_sysfs_init(void)
{
	int error;

	error = kset_register(&gdlm_kset);
	if (error)
		printk("lock_dlm: cannot register kset %d\n", error);

	return error;
}

void gdlm_sysfs_exit(void)
{
	kset_unregister(&gdlm_kset);
}

OpenPOWER on IntegriCloud