2 * Copyright (C) 2005-2013 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, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * sysfs interface and mount lifetime management
28 #include <linux/sysfs.h>
34 struct sysaufs_si_attr {
35 struct attribute attr;
36 int (*show)(struct seq_file *seq, struct super_block *sb);
39 /* ---------------------------------------------------------------------- */
42 extern unsigned long sysaufs_si_mask;
43 extern struct kset *sysaufs_kset;
44 extern struct attribute *sysaufs_si_attrs[];
45 int sysaufs_si_init(struct au_sbinfo *sbinfo);
46 int __init sysaufs_init(void);
47 void sysaufs_fin(void);
49 /* ---------------------------------------------------------------------- */
51 /* some people doesn't like to show a pointer in kernel */
52 static inline unsigned long sysaufs_si_id(struct au_sbinfo *sbinfo)
54 return sysaufs_si_mask ^ (unsigned long)sbinfo;
57 #define SysaufsSiNamePrefix "si_"
58 #define SysaufsSiNameLen (sizeof(SysaufsSiNamePrefix) + 16)
59 static inline void sysaufs_name(struct au_sbinfo *sbinfo, char *name)
61 snprintf(name, SysaufsSiNameLen, SysaufsSiNamePrefix "%lx",
62 sysaufs_si_id(sbinfo));
68 extern struct attribute_group *sysaufs_attr_group;
70 int sysaufs_si_xi_path(struct seq_file *seq, struct super_block *sb);
71 ssize_t sysaufs_si_show(struct kobject *kobj, struct attribute *attr,
74 void sysaufs_br_init(struct au_branch *br);
75 void sysaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex);
76 void sysaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex);
78 #define sysaufs_brs_init() do {} while (0)
81 #define sysaufs_attr_group NULL
83 AuStubInt0(sysaufs_si_xi_path, struct seq_file *seq, struct super_block *sb)
86 ssize_t sysaufs_si_show(struct kobject *kobj, struct attribute *attr,
92 AuStubVoid(sysaufs_br_init, struct au_branch *br)
93 AuStubVoid(sysaufs_brs_add, struct super_block *sb, aufs_bindex_t bindex)
94 AuStubVoid(sysaufs_brs_del, struct super_block *sb, aufs_bindex_t bindex)
96 static inline void sysaufs_brs_init(void)
101 #endif /* CONFIG_SYSFS */
103 #endif /* __KERNEL__ */
104 #endif /* __SYSAUFS_H__ */