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/*
* Copyright (C) 2005-2008 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
*/
/*
* lower (branch filesystem) inode and setting inotify
*
* $Id: hinode.h,v 1.8 2008/07/14 00:15:21 sfjro Exp $
*/
#ifndef __AUFS_HINODE_H__
#define __AUFS_HINODE_H__
#ifdef __KERNEL__
#include <linux/fs.h>
#include <linux/inotify.h>
#include <linux/aufs_type.h>
#include "super.h"
#include "vfsub.h"
/* ---------------------------------------------------------------------- */
struct au_hinotify {
#ifdef CONFIG_AUFS_HINOTIFY
spinlock_t hin_ignore_lock;
struct list_head hin_ignore_list;
struct inotify_watch hin_watch;
struct inode *hin_aufs_inode; /* no get/put */
#endif
};
struct au_hinode {
struct inode *hi_inode;
aufs_bindex_t hi_id;
#ifdef CONFIG_AUFS_HINOTIFY
struct au_hinotify *hi_notify;
#endif
/* reference to the copied-up whiteout with get/put */
struct dentry *hi_whdentry;
};
struct au_hin_ignore {
#ifdef CONFIG_AUFS_HINOTIFY
struct list_head ign_list;
pid_t ign_pid;
__u32 ign_events, ign_handled;
struct au_hinode *ign_hinode;
#endif
};
/* ---------------------------------------------------------------------- */
#ifdef CONFIG_AUFS_HINOTIFY
/* inotify events */
static const __u32 AuInMask = (IN_MOVE | IN_DELETE | IN_CREATE
/* | IN_ACCESS */
| IN_MODIFY | IN_ATTRIB
/* | IN_DELETE_SELF | IN_MOVE_SELF */
);
static inline
void au_hin_init(struct au_hinode *hinode, struct au_hinotify *val)
{
hinode->hi_notify = val;
}
/* hinotify.c */
int au_hin_alloc(struct au_hinode *hinode, struct inode *inode,
struct inode *h_inode);
void au_hin_free(struct au_hinode *hinode);
void au_hin_ctl(struct au_hinode *hinode, const __u32 mask);
void au_reset_hinotify(struct inode *inode, unsigned int flags);
int __init au_inotify_init(void);
void au_inotify_fin(void);
static inline void au_hin_suspend(struct au_hinode *hinode)
{
au_hin_ctl(hinode, 0);
}
static inline void au_hin_resume(struct au_hinode *hinode)
{
au_hin_ctl(hinode, AuInMask);
}
#else
static inline
void au_hin_init(struct au_hinode *hinode, struct au_hinotify *val)
{
/* empty */
}
static inline
int au_hin_alloc(struct au_hinode *hinode, struct inode *inode,
struct inode *h_inode)
{
return -EOPNOTSUPP;
}
static inline void au_hin_free(struct au_hinode *hinode)
{
/* nothing */
}
static inline void au_reset_hinotify(struct inode *inode, unsigned int flags)
{
/* nothing */
}
static inline int au_inotify_init(void)
{
return 0;
}
#define au_inotify_fin() do {} while (0)
static inline void au_hin_suspend(struct au_hinode *hinode)
{
/* empty */
}
static inline void au_hin_resume(struct au_hinode *hinode)
{
/* empty */
}
#endif /* CONFIG_AUFS_HINOTIFY */
#if defined(CONFIG_AUFS_HINOTIFY) && defined(CONFIG_AUFS_DEBUG)
static inline void au_hin_list_del(struct list_head *e)
{
list_del_init(e);
}
void au_dbg_hin_list(struct vfsub_args *vargs);
#else
static inline void au_hin_list_del(struct list_head *e)
{
list_del(e);
}
static inline void au_dbg_hin_list(struct vfsub_args *vargs)
{
/* empty */
}
#endif /* CONFIG_AUFS_DEBUG */
/* ---------------------------------------------------------------------- */
#endif /* __KERNEL__ */
#endif /* __AUFS_HINODE_H__ */
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