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/*
* Copyright (C) 2005-2014 Junjiro R. 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, see <http://www.gnu.org/licenses/>.
*/
/*
* copy-up/down functions
*/
#ifndef __AUFS_CPUP_H__
#define __AUFS_CPUP_H__
#ifdef __KERNEL__
#include <linux/path.h>
struct inode;
struct file;
struct au_pin;
void au_cpup_attr_flags(struct inode *dst, unsigned int iflags);
void au_cpup_attr_timesizes(struct inode *inode);
void au_cpup_attr_nlink(struct inode *inode, int force);
void au_cpup_attr_changeable(struct inode *inode);
void au_cpup_igen(struct inode *inode, struct inode *h_inode);
void au_cpup_attr_all(struct inode *inode, int force);
/* ---------------------------------------------------------------------- */
struct au_cp_generic {
struct dentry *dentry;
aufs_bindex_t bdst, bsrc;
loff_t len;
struct au_pin *pin;
unsigned int flags;
};
/* cpup flags */
#define AuCpup_DTIME 1 /* do dtime_store/revert */
#define AuCpup_KEEPLINO (1 << 1) /* do not clear the lower xino,
for link(2) */
#define AuCpup_RENAME (1 << 2) /* rename after cpup */
#define AuCpup_HOPEN (1 << 3) /* call h_open_pre/post() in
cpup */
#define AuCpup_OVERWRITE (1 << 4) /* allow overwriting the
existing entry */
#define AuCpup_RWDST (1 << 5) /* force write target even if
the branch is marked as RO */
#define au_ftest_cpup(flags, name) ((flags) & AuCpup_##name)
#define au_fset_cpup(flags, name) \
do { (flags) |= AuCpup_##name; } while (0)
#define au_fclr_cpup(flags, name) \
do { (flags) &= ~AuCpup_##name; } while (0)
int au_copy_file(struct file *dst, struct file *src, loff_t len);
int au_sio_cpup_simple(struct au_cp_generic *cpg);
int au_sio_cpdown_simple(struct au_cp_generic *cpg);
int au_sio_cpup_wh(struct au_cp_generic *cpg, struct file *file);
int au_cp_dirs(struct dentry *dentry, aufs_bindex_t bdst,
int (*cp)(struct dentry *dentry, aufs_bindex_t bdst,
struct au_pin *pin,
struct dentry *h_parent, void *arg),
void *arg);
int au_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst);
int au_test_and_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst);
/* ---------------------------------------------------------------------- */
/* keep timestamps when copyup */
struct au_dtime {
struct dentry *dt_dentry;
struct path dt_h_path;
struct timespec dt_atime, dt_mtime;
};
void au_dtime_store(struct au_dtime *dt, struct dentry *dentry,
struct path *h_path);
void au_dtime_revert(struct au_dtime *dt);
#endif /* __KERNEL__ */
#endif /* __AUFS_CPUP_H__ */
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