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86 lines
3.0 KiB
86 lines
3.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (C) 2005-2020 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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