mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2010-2019 Junjiro R. Okajima
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*
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* This program, aufs is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* dynamically customizable operations (for regular files only)
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*/
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#ifndef __AUFS_DYNOP_H__
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#define __AUFS_DYNOP_H__
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#ifdef __KERNEL__
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#include <linux/fs.h>
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#include <linux/kref.h>
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enum {AuDy_AOP, AuDyLast};
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struct au_dynop {
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int dy_type;
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union {
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const void *dy_hop;
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const struct address_space_operations *dy_haop;
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};
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};
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struct au_dykey {
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union {
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struct hlist_bl_node dk_hnode;
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struct rcu_head dk_rcu;
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};
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struct au_dynop dk_op;
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/*
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* during I am in the branch local array, kref is gotten. when the
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* branch is removed, kref is put.
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*/
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struct kref dk_kref;
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};
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/* stop unioning since their sizes are very different from each other */
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struct au_dyaop {
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struct au_dykey da_key;
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struct address_space_operations da_op; /* not const */
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};
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/* make sure that 'struct au_dykey *' can be any type */
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static_assert(!offsetof(struct au_dyaop, da_key));
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/* ---------------------------------------------------------------------- */
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/* dynop.c */
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struct au_branch;
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void au_dy_put(struct au_dykey *key);
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int au_dy_iaop(struct inode *inode, aufs_bindex_t bindex,
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struct inode *h_inode);
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int au_dy_irefresh(struct inode *inode);
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void au_dy_arefresh(int do_dio);
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void __init au_dy_init(void);
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void au_dy_fin(void);
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#endif /* __KERNEL__ */
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#endif /* __AUFS_DYNOP_H__ */
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