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1 | /* |
2 | * Copyright (C) 2005-2016 Junjiro R. Okajima | |
3 | * | |
4 | * This program, aufs is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | /* | |
19 | * copy-up/down functions | |
20 | */ | |
21 | ||
22 | #ifndef __AUFS_CPUP_H__ | |
23 | #define __AUFS_CPUP_H__ | |
24 | ||
25 | #ifdef __KERNEL__ | |
26 | ||
27 | #include <linux/path.h> | |
28 | ||
29 | struct inode; | |
30 | struct file; | |
31 | struct au_pin; | |
32 | ||
33 | void au_cpup_attr_flags(struct inode *dst, unsigned int iflags); | |
34 | void au_cpup_attr_timesizes(struct inode *inode); | |
35 | void au_cpup_attr_nlink(struct inode *inode, int force); | |
36 | void au_cpup_attr_changeable(struct inode *inode); | |
37 | void au_cpup_igen(struct inode *inode, struct inode *h_inode); | |
38 | void au_cpup_attr_all(struct inode *inode, int force); | |
39 | ||
40 | /* ---------------------------------------------------------------------- */ | |
41 | ||
42 | struct au_cp_generic { | |
43 | struct dentry *dentry; | |
44 | aufs_bindex_t bdst, bsrc; | |
45 | loff_t len; | |
46 | struct au_pin *pin; | |
47 | unsigned int flags; | |
48 | }; | |
49 | ||
50 | /* cpup flags */ | |
51 | #define AuCpup_DTIME 1 /* do dtime_store/revert */ | |
52 | #define AuCpup_KEEPLINO (1 << 1) /* do not clear the lower xino, | |
53 | for link(2) */ | |
54 | #define AuCpup_RENAME (1 << 2) /* rename after cpup */ | |
55 | #define AuCpup_HOPEN (1 << 3) /* call h_open_pre/post() in | |
56 | cpup */ | |
57 | #define AuCpup_OVERWRITE (1 << 4) /* allow overwriting the | |
58 | existing entry */ | |
59 | #define AuCpup_RWDST (1 << 5) /* force write target even if | |
60 | the branch is marked as RO */ | |
61 | ||
62 | #define au_ftest_cpup(flags, name) ((flags) & AuCpup_##name) | |
63 | #define au_fset_cpup(flags, name) \ | |
64 | do { (flags) |= AuCpup_##name; } while (0) | |
65 | #define au_fclr_cpup(flags, name) \ | |
66 | do { (flags) &= ~AuCpup_##name; } while (0) | |
67 | ||
68 | int au_copy_file(struct file *dst, struct file *src, loff_t len); | |
69 | int au_sio_cpup_simple(struct au_cp_generic *cpg); | |
70 | int au_sio_cpdown_simple(struct au_cp_generic *cpg); | |
71 | int au_sio_cpup_wh(struct au_cp_generic *cpg, struct file *file); | |
72 | ||
73 | int au_cp_dirs(struct dentry *dentry, aufs_bindex_t bdst, | |
74 | int (*cp)(struct dentry *dentry, aufs_bindex_t bdst, | |
75 | struct au_pin *pin, | |
76 | struct dentry *h_parent, void *arg), | |
77 | void *arg); | |
78 | int au_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst); | |
79 | int au_test_and_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst); | |
80 | ||
81 | /* ---------------------------------------------------------------------- */ | |
82 | ||
83 | /* keep timestamps when copyup */ | |
84 | struct au_dtime { | |
85 | struct dentry *dt_dentry; | |
86 | struct path dt_h_path; | |
87 | struct timespec dt_atime, dt_mtime; | |
88 | }; | |
89 | void au_dtime_store(struct au_dtime *dt, struct dentry *dentry, | |
90 | struct path *h_path); | |
91 | void au_dtime_revert(struct au_dtime *dt); | |
92 | ||
93 | #endif /* __KERNEL__ */ | |
94 | #endif /* __AUFS_CPUP_H__ */ |