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    Subject[PATCH 18/67] aufs sysfs interface and lifetime management, header
    Date
    From: Junjiro Okajima <hooanon05@yahoo.co.jp>

    initial commit
    aufs sysfs interface and lifetime management, header

    Signed-off-by: Junjiro Okajima <hooanon05@yahoo.co.jp>
    ---
    fs/aufs/sysaufs.h | 150 +++++++++++++++++++++++++++++++++++++++++++++++++++++
    1 files changed, 150 insertions(+), 0 deletions(-)

    diff --git a/fs/aufs/sysaufs.h b/fs/aufs/sysaufs.h
    new file mode 100644
    index 0000000..eff08c0
    --- /dev/null
    +++ b/fs/aufs/sysaufs.h
    @@ -0,0 +1,150 @@
    +/*
    + * Copyright (C) 2007-2008 Junjiro Okajima
    + *
    + * This program, aufs is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License as published by
    + * the Free Software Foundation; either version 2 of the License, or
    + * (at your option) any later version.
    + *
    + * This program 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 this program; if not, write to the Free Software
    + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
    + */
    +
    +/*
    + * sysfs interface and lifetime management
    + *
    + * $Id: sysaufs.h,v 1.5 2008/05/04 23:51:26 sfjro Exp $
    + */
    +
    +#ifndef __SYSAUFS_H__
    +#define __SYSAUFS_H__
    +
    +#ifdef __KERNEL__
    +
    +#include <linux/fs.h>
    +#include <linux/sysfs.h>
    +#include "module.h"
    +#include "super.h"
    +
    +/* entries under sysfs per super block */
    +enum {
    + SysaufsSb_XINO,
    + SysaufsSb_MNTPNT1,
    +#if 0
    + SysaufsSb_PLINK,
    + SysaufsSb_files,
    +#endif
    + SysaufsSb_Last
    +};
    +
    +#define SysaufsSb_PREFIX "si_" /* followed by %p */
    +
    +struct au_sbi_attr {
    + struct attribute attr;
    + int (*show)(struct seq_file *seq, struct super_block *sb);
    +};
    +
    +/* ---------------------------------------------------------------------- */
    +
    +/* sysaufs.c */
    +extern struct mutex au_sbilist_mtx;
    +extern struct list_head au_sbilist;
    +extern struct attribute *au_sbi_attrs[];
    +int sysaufs_si_init(struct au_sbinfo *sbinfo);
    +int __init sysaufs_init(void);
    +void sysaufs_fin(void);
    +
    +/* ---------------------------------------------------------------------- */
    +
    +static inline void au_sbilist_lock(void)
    +{
    + mutex_lock(&au_sbilist_mtx);
    +}
    +
    +static inline void au_sbilist_unlock(void)
    +{
    + mutex_unlock(&au_sbilist_mtx);
    +}
    +
    +static inline void au_sbilist_del(struct au_sbinfo *sbinfo)
    +{
    + list_del(&sbinfo->si_list);
    +}
    +
    +static inline void au_sbilist_add(struct au_sbinfo *sbinfo)
    +{
    + /* the order in this list is important */
    + list_add_tail(&sbinfo->si_list, &au_sbilist);
    +}
    +
    +/* ---------------------------------------------------------------------- */
    +
    +struct au_branch;
    +#ifdef CONFIG_SYSFS
    +/* sysfs.c */
    +extern struct attribute_group *au_attr_group;
    +extern struct kobj_type *au_ktype;
    +
    +int sysaufs_sbi_xino(struct seq_file *seq, struct super_block *sb);
    +int sysaufs_sbi_mntpnt1(struct seq_file *seq, struct super_block *sb);
    +ssize_t sysaufs_sbi_show(struct kobject *kobj, struct attribute *attr,
    + char *buf);
    +
    +void sysaufs_br_init(struct au_branch *br);
    +void sysaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex);
    +void sysaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex);
    +
    +#define sysaufs_brs_init() do {} while (0)
    +
    +#else
    +#define au_attr_group NULL
    +#define au_ktype NULL
    +
    +static inline
    +int sysaufs_sbi_xino(struct seq_file *seq, struct super_block *sb)
    +{
    + return 0;
    +}
    +
    +static inline
    +int sysaufs_sbi_mntpnt1(struct seq_file *seq, struct super_block *sb)
    +{
    + return 0;
    +}
    +
    +static inline
    +ssize_t sysaufs_sbi_show(struct kobject *kobj, struct attribute *attr,
    + char *buf)
    +{
    + return 0;
    +}
    +
    +static inline void sysaufs_br_init(struct au_branch *br)
    +{
    + /* empty */
    +}
    +
    +static inline void sysaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex)
    +{
    + /* nothing */
    +}
    +
    +static inline void sysaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex)
    +{
    + /* nothing */
    +}
    +
    +static inline void sysaufs_brs_init(void)
    +{
    + sysaufs_brs = 0;
    +}
    +#endif /* CONFIG_SYSFS */
    +
    +#endif /* __KERNEL__ */
    +#endif /* __SYSAUFS_H__ */
    --
    1.4.4.4


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