mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 04:50:53 +07:00
87 lines
3.0 KiB
C
87 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2005-2019 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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* whiteout for logical deletion and opaque directory
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*/
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#ifndef __AUFS_WHOUT_H__
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#define __AUFS_WHOUT_H__
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#ifdef __KERNEL__
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#include "dir.h"
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/* whout.c */
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int au_wh_name_alloc(struct qstr *wh, const struct qstr *name);
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int au_wh_test(struct dentry *h_parent, struct qstr *wh_name, int try_sio);
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int au_diropq_test(struct dentry *h_dentry);
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struct au_branch;
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struct dentry *au_whtmp_lkup(struct dentry *h_parent, struct au_branch *br,
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struct qstr *prefix);
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int au_whtmp_ren(struct dentry *h_dentry, struct au_branch *br);
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int au_wh_unlink_dentry(struct inode *h_dir, struct path *h_path,
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struct dentry *dentry);
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int au_wh_init(struct au_branch *br, struct super_block *sb);
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/* diropq flags */
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#define AuDiropq_CREATE 1
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#define au_ftest_diropq(flags, name) ((flags) & AuDiropq_##name)
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#define au_fset_diropq(flags, name) \
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do { (flags) |= AuDiropq_##name; } while (0)
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#define au_fclr_diropq(flags, name) \
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do { (flags) &= ~AuDiropq_##name; } while (0)
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struct dentry *au_diropq_sio(struct dentry *dentry, aufs_bindex_t bindex,
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unsigned int flags);
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struct dentry *au_wh_lkup(struct dentry *h_parent, struct qstr *base_name,
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struct au_branch *br);
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struct dentry *au_wh_create(struct dentry *dentry, aufs_bindex_t bindex,
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struct dentry *h_parent);
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/* real rmdir for the whiteout-ed dir */
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struct au_whtmp_rmdir {
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struct inode *dir;
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struct au_branch *br;
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struct dentry *wh_dentry;
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struct au_nhash whlist;
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};
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struct au_whtmp_rmdir *au_whtmp_rmdir_alloc(struct super_block *sb, gfp_t gfp);
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void au_whtmp_rmdir_free(struct au_whtmp_rmdir *whtmp);
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int au_whtmp_rmdir(struct inode *dir, aufs_bindex_t bindex,
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struct dentry *wh_dentry, struct au_nhash *whlist);
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void au_whtmp_kick_rmdir(struct inode *dir, aufs_bindex_t bindex,
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struct dentry *wh_dentry, struct au_whtmp_rmdir *args);
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/* ---------------------------------------------------------------------- */
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static inline struct dentry *au_diropq_create(struct dentry *dentry,
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aufs_bindex_t bindex)
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{
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return au_diropq_sio(dentry, bindex, AuDiropq_CREATE);
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}
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static inline int au_diropq_remove(struct dentry *dentry, aufs_bindex_t bindex)
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{
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return PTR_ERR(au_diropq_sio(dentry, bindex, !AuDiropq_CREATE));
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}
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#endif /* __KERNEL__ */
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#endif /* __AUFS_WHOUT_H__ */
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