2 * Copyright (C) 2005-2016 Junjiro R. Okajima
4 * This program, aufs is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 * sysfs interface and lifetime management
20 * they are necessary regardless sysfs is disabled.
23 #include <linux/random.h>
26 unsigned long sysaufs_si_mask
;
27 struct kset
*sysaufs_kset
;
29 #define AuSiAttr(_name) { \
30 .attr = { .name = __stringify(_name), .mode = 0444 }, \
31 .show = sysaufs_si_##_name, \
34 static struct sysaufs_si_attr sysaufs_si_attr_xi_path
= AuSiAttr(xi_path
);
35 struct attribute
*sysaufs_si_attrs
[] = {
36 &sysaufs_si_attr_xi_path
.attr
,
40 static const struct sysfs_ops au_sbi_ops
= {
41 .show
= sysaufs_si_show
44 static struct kobj_type au_sbi_ktype
= {
45 .release
= au_si_free
,
46 .sysfs_ops
= &au_sbi_ops
,
47 .default_attrs
= sysaufs_si_attrs
50 /* ---------------------------------------------------------------------- */
52 int sysaufs_si_init(struct au_sbinfo
*sbinfo
)
56 sbinfo
->si_kobj
.kset
= sysaufs_kset
;
57 /* cf. sysaufs_name() */
58 err
= kobject_init_and_add
59 (&sbinfo
->si_kobj
, &au_sbi_ktype
, /*&sysaufs_kset->kobj*/NULL
,
60 SysaufsSiNamePrefix
"%lx", sysaufs_si_id(sbinfo
));
62 dbgaufs_si_null(sbinfo
);
64 err
= dbgaufs_si_init(sbinfo
);
66 kobject_put(&sbinfo
->si_kobj
);
71 void sysaufs_fin(void)
74 sysfs_remove_group(&sysaufs_kset
->kobj
, sysaufs_attr_group
);
75 kset_unregister(sysaufs_kset
);
78 int __init
sysaufs_init(void)
83 get_random_bytes(&sysaufs_si_mask
, sizeof(sysaufs_si_mask
));
84 } while (!sysaufs_si_mask
);
87 sysaufs_kset
= kset_create_and_add(AUFS_NAME
, NULL
, fs_kobj
);
88 if (unlikely(!sysaufs_kset
))
90 err
= PTR_ERR(sysaufs_kset
);
91 if (IS_ERR(sysaufs_kset
))
93 err
= sysfs_create_group(&sysaufs_kset
->kobj
, sysaufs_attr_group
);
95 kset_unregister(sysaufs_kset
);