aboutsummaryrefslogtreecommitdiffstats
path: root/fs/gfs2/locking/dlm/sysfs.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/gfs2/locking/dlm/sysfs.c')
-rw-r--r--fs/gfs2/locking/dlm/sysfs.c226
1 files changed, 226 insertions, 0 deletions
diff --git a/fs/gfs2/locking/dlm/sysfs.c b/fs/gfs2/locking/dlm/sysfs.c
new file mode 100644
index 000000000000..29ae06f94944
--- /dev/null
+++ b/fs/gfs2/locking/dlm/sysfs.c
@@ -0,0 +1,226 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#include <linux/ctype.h>
11#include <linux/stat.h>
12
13#include "lock_dlm.h"
14
15extern struct lm_lockops gdlm_ops;
16
17static ssize_t proto_name_show(struct gdlm_ls *ls, char *buf)
18{
19 return sprintf(buf, "%s\n", gdlm_ops.lm_proto_name);
20}
21
22static ssize_t block_show(struct gdlm_ls *ls, char *buf)
23{
24 ssize_t ret;
25 int val = 0;
26
27 if (test_bit(DFL_BLOCK_LOCKS, &ls->flags))
28 val = 1;
29 ret = sprintf(buf, "%d\n", val);
30 return ret;
31}
32
33static ssize_t block_store(struct gdlm_ls *ls, const char *buf, size_t len)
34{
35 ssize_t ret = len;
36 int val;
37
38 val = simple_strtol(buf, NULL, 0);
39
40 if (val == 1)
41 set_bit(DFL_BLOCK_LOCKS, &ls->flags);
42 else if (val == 0) {
43 clear_bit(DFL_BLOCK_LOCKS, &ls->flags);
44 gdlm_submit_delayed(ls);
45 } else {
46 ret = -EINVAL;
47 }
48 return ret;
49}
50
51static ssize_t withdraw_show(struct gdlm_ls *ls, char *buf)
52{
53 ssize_t ret;
54 int val = 0;
55
56 if (test_bit(DFL_WITHDRAW, &ls->flags))
57 val = 1;
58 ret = sprintf(buf, "%d\n", val);
59 return ret;
60}
61
62static ssize_t withdraw_store(struct gdlm_ls *ls, const char *buf, size_t len)
63{
64 ssize_t ret = len;
65 int val;
66
67 val = simple_strtol(buf, NULL, 0);
68
69 if (val == 1)
70 set_bit(DFL_WITHDRAW, &ls->flags);
71 else
72 ret = -EINVAL;
73 wake_up(&ls->wait_control);
74 return ret;
75}
76
77static ssize_t id_show(struct gdlm_ls *ls, char *buf)
78{
79 return sprintf(buf, "%u\n", ls->id);
80}
81
82static ssize_t jid_show(struct gdlm_ls *ls, char *buf)
83{
84 return sprintf(buf, "%d\n", ls->jid);
85}
86
87static ssize_t first_show(struct gdlm_ls *ls, char *buf)
88{
89 return sprintf(buf, "%d\n", ls->first);
90}
91
92static ssize_t first_done_show(struct gdlm_ls *ls, char *buf)
93{
94 return sprintf(buf, "%d\n", ls->first_done);
95}
96
97static ssize_t recover_show(struct gdlm_ls *ls, char *buf)
98{
99 return sprintf(buf, "%d\n", ls->recover_jid);
100}
101
102static ssize_t recover_store(struct gdlm_ls *ls, const char *buf, size_t len)
103{
104 ls->recover_jid = simple_strtol(buf, NULL, 0);
105 ls->fscb(ls->sdp, LM_CB_NEED_RECOVERY, &ls->recover_jid);
106 return len;
107}
108
109static ssize_t recover_done_show(struct gdlm_ls *ls, char *buf)
110{
111 return sprintf(buf, "%d\n", ls->recover_jid_done);
112}
113
114static ssize_t recover_status_show(struct gdlm_ls *ls, char *buf)
115{
116 return sprintf(buf, "%d\n", ls->recover_jid_status);
117}
118
119struct gdlm_attr {
120 struct attribute attr;
121 ssize_t (*show)(struct gdlm_ls *, char *);
122 ssize_t (*store)(struct gdlm_ls *, const char *, size_t);
123};
124
125#define GDLM_ATTR(_name,_mode,_show,_store) \
126static struct gdlm_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
127
128GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
129GDLM_ATTR(block, 0644, block_show, block_store);
130GDLM_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
131GDLM_ATTR(id, 0444, id_show, NULL);
132GDLM_ATTR(jid, 0444, jid_show, NULL);
133GDLM_ATTR(first, 0444, first_show, NULL);
134GDLM_ATTR(first_done, 0444, first_done_show, NULL);
135GDLM_ATTR(recover, 0644, recover_show, recover_store);
136GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
137GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
138
139static struct attribute *gdlm_attrs[] = {
140 &gdlm_attr_proto_name.attr,
141 &gdlm_attr_block.attr,
142 &gdlm_attr_withdraw.attr,
143 &gdlm_attr_id.attr,
144 &gdlm_attr_jid.attr,
145 &gdlm_attr_first.attr,
146 &gdlm_attr_first_done.attr,
147 &gdlm_attr_recover.attr,
148 &gdlm_attr_recover_done.attr,
149 &gdlm_attr_recover_status.attr,
150 NULL,
151};
152
153static ssize_t gdlm_attr_show(struct kobject *kobj, struct attribute *attr,
154 char *buf)
155{
156 struct gdlm_ls *ls = container_of(kobj, struct gdlm_ls, kobj);
157 struct gdlm_attr *a = container_of(attr, struct gdlm_attr, attr);
158 return a->show ? a->show(ls, buf) : 0;
159}
160
161static ssize_t gdlm_attr_store(struct kobject *kobj, struct attribute *attr,
162 const char *buf, size_t len)
163{
164 struct gdlm_ls *ls = container_of(kobj, struct gdlm_ls, kobj);
165 struct gdlm_attr *a = container_of(attr, struct gdlm_attr, attr);
166 return a->store ? a->store(ls, buf, len) : len;
167}
168
169static struct sysfs_ops gdlm_attr_ops = {
170 .show = gdlm_attr_show,
171 .store = gdlm_attr_store,
172};
173
174static struct kobj_type gdlm_ktype = {
175 .default_attrs = gdlm_attrs,
176 .sysfs_ops = &gdlm_attr_ops,
177};
178
179static struct kset gdlm_kset = {
180 .subsys = &kernel_subsys,
181 .kobj = {.name = "lock_dlm",},
182 .ktype = &gdlm_ktype,
183};
184
185int gdlm_kobject_setup(struct gdlm_ls *ls, struct kobject *fskobj)
186{
187 int error;
188
189 error = kobject_set_name(&ls->kobj, "%s", "lock_module");
190 if (error) {
191 log_error("can't set kobj name %d", error);
192 return error;
193 }
194
195 ls->kobj.kset = &gdlm_kset;
196 ls->kobj.ktype = &gdlm_ktype;
197 ls->kobj.parent = fskobj;
198
199 error = kobject_register(&ls->kobj);
200 if (error)
201 log_error("can't register kobj %d", error);
202
203 return error;
204}
205
206void gdlm_kobject_release(struct gdlm_ls *ls)
207{
208 kobject_unregister(&ls->kobj);
209}
210
211int gdlm_sysfs_init(void)
212{
213 int error;
214
215 error = kset_register(&gdlm_kset);
216 if (error)
217 printk("lock_dlm: cannot register kset %d\n", error);
218
219 return error;
220}
221
222void gdlm_sysfs_exit(void)
223{
224 kset_unregister(&gdlm_kset);
225}
226
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-18 03:22:42 -0500