| /* |
| * Copyright (C) 2005-2013 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, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * whiteout for logical deletion and opaque directory |
| */ |
| |
| #ifndef __AUFS_WHOUT_H__ |
| #define __AUFS_WHOUT_H__ |
| |
| #ifdef __KERNEL__ |
| |
| #include "dir.h" |
| |
| /* whout.c */ |
| int au_wh_name_alloc(struct qstr *wh, const struct qstr *name); |
| struct au_branch; |
| int au_wh_test(struct dentry *h_parent, struct qstr *wh_name, |
| struct au_branch *br, int try_sio); |
| int au_diropq_test(struct dentry *h_dentry, struct au_branch *br); |
| struct dentry *au_whtmp_lkup(struct dentry *h_parent, struct au_branch *br, |
| struct qstr *prefix); |
| int au_whtmp_ren(struct dentry *h_dentry, struct au_branch *br); |
| int au_wh_unlink_dentry(struct inode *h_dir, struct path *h_path, |
| struct dentry *dentry); |
| int au_wh_init(struct au_branch *br, struct super_block *sb); |
| |
| /* diropq flags */ |
| #define AuDiropq_CREATE 1 |
| #define au_ftest_diropq(flags, name) ((flags) & AuDiropq_##name) |
| #define au_fset_diropq(flags, name) \ |
| do { (flags) |= AuDiropq_##name; } while (0) |
| #define au_fclr_diropq(flags, name) \ |
| do { (flags) &= ~AuDiropq_##name; } while (0) |
| |
| struct dentry *au_diropq_sio(struct dentry *dentry, aufs_bindex_t bindex, |
| unsigned int flags); |
| struct dentry *au_wh_lkup(struct dentry *h_parent, struct qstr *base_name, |
| struct au_branch *br); |
| struct dentry *au_wh_create(struct dentry *dentry, aufs_bindex_t bindex, |
| struct dentry *h_parent); |
| |
| /* real rmdir for the whiteout-ed dir */ |
| struct au_whtmp_rmdir { |
| struct inode *dir; |
| struct au_branch *br; |
| struct dentry *wh_dentry; |
| struct au_nhash whlist; |
| }; |
| |
| struct au_whtmp_rmdir *au_whtmp_rmdir_alloc(struct super_block *sb, gfp_t gfp); |
| void au_whtmp_rmdir_free(struct au_whtmp_rmdir *whtmp); |
| int au_whtmp_rmdir(struct inode *dir, aufs_bindex_t bindex, |
| struct dentry *wh_dentry, struct au_nhash *whlist); |
| void au_whtmp_kick_rmdir(struct inode *dir, aufs_bindex_t bindex, |
| struct dentry *wh_dentry, struct au_whtmp_rmdir *args); |
| |
| /* ---------------------------------------------------------------------- */ |
| |
| static inline struct dentry *au_diropq_create(struct dentry *dentry, |
| aufs_bindex_t bindex) |
| { |
| return au_diropq_sio(dentry, bindex, AuDiropq_CREATE); |
| } |
| |
| static inline int au_diropq_remove(struct dentry *dentry, aufs_bindex_t bindex) |
| { |
| return PTR_ERR(au_diropq_sio(dentry, bindex, !AuDiropq_CREATE)); |
| } |
| |
| #endif /* __KERNEL__ */ |
| #endif /* __AUFS_WHOUT_H__ */ |