2 * Copyright (C) 2005-2017 Junjiro R. Okajima
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.
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.
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/>.
22 #ifndef __AUFS_OPTS_H__
23 #define __AUFS_OPTS_H__
27 #include <linux/path.h>
31 /* ---------------------------------------------------------------------- */
34 #define AuOpt_XINO 1 /* external inode number bitmap
35 and translation table */
36 #define AuOpt_TRUNC_XINO (1 << 1) /* truncate xino files */
37 #define AuOpt_UDBA_NONE (1 << 2) /* users direct branch access */
38 #define AuOpt_UDBA_REVAL (1 << 3)
39 #define AuOpt_UDBA_HNOTIFY (1 << 4)
40 #define AuOpt_SHWH (1 << 5) /* show whiteout */
41 #define AuOpt_PLINK (1 << 6) /* pseudo-link */
42 #define AuOpt_DIRPERM1 (1 << 7) /* ignore the lower dir's perm
44 #define AuOpt_ALWAYS_DIROPQ (1 << 9) /* policy to creating diropq */
45 #define AuOpt_SUM (1 << 10) /* summation for statfs(2) */
46 #define AuOpt_SUM_W (1 << 11) /* unimplemented */
47 #define AuOpt_WARN_PERM (1 << 12) /* warn when add-branch */
48 #define AuOpt_VERBOSE (1 << 13) /* busy inode when del-branch */
49 #define AuOpt_DIO (1 << 14) /* direct io */
51 #ifndef CONFIG_AUFS_HNOTIFY
52 #undef AuOpt_UDBA_HNOTIFY
53 #define AuOpt_UDBA_HNOTIFY 0
55 #ifndef CONFIG_AUFS_SHWH
60 #define AuOpt_Def (AuOpt_XINO \
63 /* | AuOpt_DIRPERM1 */ \
65 #define AuOptMask_UDBA (AuOpt_UDBA_NONE \
69 #define au_opt_test(flags, name) (flags & AuOpt_##name)
70 #define au_opt_set(flags, name) do { \
71 BUILD_BUG_ON(AuOpt_##name & AuOptMask_UDBA); \
72 ((flags) |= AuOpt_##name); \
74 #define au_opt_set_udba(flags, name) do { \
75 (flags) &= ~AuOptMask_UDBA; \
76 ((flags) |= AuOpt_##name); \
78 #define au_opt_clr(flags, name) do { \
79 ((flags) &= ~AuOpt_##name); \
82 static inline unsigned int au_opts_plink(unsigned int mntflags
)
87 return mntflags
& ~AuOpt_PLINK
;
91 /* ---------------------------------------------------------------------- */
93 /* policies to select one among multiple writable branches */
95 AuWbrCreate_TDP
, /* top down parent */
96 AuWbrCreate_RR
, /* round robin */
97 AuWbrCreate_MFS
, /* most free space */
98 AuWbrCreate_MFSV
, /* mfs with seconds */
99 AuWbrCreate_MFSRR
, /* mfs then rr */
100 AuWbrCreate_MFSRRV
, /* mfs then rr with seconds */
101 AuWbrCreate_TDMFS
, /* top down regardless parent and mfs */
102 AuWbrCreate_TDMFSV
, /* top down regardless parent and mfs */
103 AuWbrCreate_PMFS
, /* parent and mfs */
104 AuWbrCreate_PMFSV
, /* parent and mfs with seconds */
105 AuWbrCreate_PMFSRR
, /* parent, mfs and round-robin */
106 AuWbrCreate_PMFSRRV
, /* plus seconds */
108 AuWbrCreate_Def
= AuWbrCreate_TDP
112 AuWbrCopyup_TDP
, /* top down parent */
113 AuWbrCopyup_BUP
, /* bottom up parent */
114 AuWbrCopyup_BU
, /* bottom up */
116 AuWbrCopyup_Def
= AuWbrCopyup_TDP
119 /* ---------------------------------------------------------------------- */
122 aufs_bindex_t bindex
;
136 struct dentry
*h_root
;
144 struct au_opt_xino_itrunc
{
145 aufs_bindex_t bindex
;
148 struct au_opt_wbr_create
{
151 unsigned long long mfsrr_watermark
;
157 struct au_opt_xino xino
;
158 struct au_opt_xino_itrunc xino_itrunc
;
159 struct au_opt_add add
;
160 struct au_opt_del del
;
161 struct au_opt_mod mod
;
167 struct au_opt_wbr_create wbr_create
;
169 unsigned int fhsm_second
;
174 #define AuOpts_REMOUNT 1
175 #define AuOpts_REFRESH (1 << 1)
176 #define AuOpts_TRUNC_XIB (1 << 2)
177 #define AuOpts_REFRESH_DYAOP (1 << 3)
178 #define AuOpts_REFRESH_IDOP (1 << 4)
179 #define au_ftest_opts(flags, name) ((flags) & AuOpts_##name)
180 #define au_fset_opts(flags, name) \
181 do { (flags) |= AuOpts_##name; } while (0)
182 #define au_fclr_opts(flags, name) \
183 do { (flags) &= ~AuOpts_##name; } while (0)
189 unsigned int given_udba
;
191 unsigned long sb_flags
;
194 /* ---------------------------------------------------------------------- */
197 void au_optstr_br_perm(au_br_perm_str_t
*str
, int perm
);
198 const char *au_optstr_udba(int udba
);
199 const char *au_optstr_wbr_copyup(int wbr_copyup
);
200 const char *au_optstr_wbr_create(int wbr_create
);
202 void au_opts_free(struct au_opts
*opts
);
203 int au_opts_parse(struct super_block
*sb
, char *str
, struct au_opts
*opts
);
204 int au_opts_verify(struct super_block
*sb
, unsigned long sb_flags
,
205 unsigned int pending
);
206 int au_opts_mount(struct super_block
*sb
, struct au_opts
*opts
);
207 int au_opts_remount(struct super_block
*sb
, struct au_opts
*opts
);
209 unsigned int au_opt_udba(struct super_block
*sb
);
211 #endif /* __KERNEL__ */
212 #endif /* __AUFS_OPTS_H__ */