2 * Copyright (C) 2005-2013 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, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 #ifndef __AUFS_OPTS_H__
24 #define __AUFS_OPTS_H__
28 #include <linux/path.h>
33 /* ---------------------------------------------------------------------- */
36 #define AuOpt_XINO 1 /* external inode number bitmap
37 and translation table */
38 #define AuOpt_TRUNC_XINO (1 << 1) /* truncate xino files */
39 #define AuOpt_UDBA_NONE (1 << 2) /* users direct branch access */
40 #define AuOpt_UDBA_REVAL (1 << 3)
41 #define AuOpt_UDBA_HNOTIFY (1 << 4)
42 #define AuOpt_SHWH (1 << 5) /* show whiteout */
43 #define AuOpt_PLINK (1 << 6) /* pseudo-link */
44 #define AuOpt_DIRPERM1 (1 << 7) /* unimplemented */
45 #define AuOpt_REFROF (1 << 8) /* unimplemented */
46 #define AuOpt_ALWAYS_DIROPQ (1 << 9) /* policy to creating diropq */
47 #define AuOpt_SUM (1 << 10) /* summation for statfs(2) */
48 #define AuOpt_SUM_W (1 << 11) /* unimplemented */
49 #define AuOpt_WARN_PERM (1 << 12) /* warn when add-branch */
50 #define AuOpt_VERBOSE (1 << 13) /* busy inode when del-branch */
51 #define AuOpt_DIO (1 << 14) /* direct io */
53 #ifndef CONFIG_AUFS_HNOTIFY
54 #undef AuOpt_UDBA_HNOTIFY
55 #define AuOpt_UDBA_HNOTIFY 0
57 #ifndef CONFIG_AUFS_SHWH
62 #define AuOpt_Def (AuOpt_XINO \
65 /* | AuOpt_DIRPERM1 */ \
67 #define AuOptMask_UDBA (AuOpt_UDBA_NONE \
71 #define au_opt_test(flags, name) (flags & AuOpt_##name)
72 #define au_opt_set(flags, name) do { \
73 BUILD_BUG_ON(AuOpt_##name & AuOptMask_UDBA); \
74 ((flags) |= AuOpt_##name); \
76 #define au_opt_set_udba(flags, name) do { \
77 (flags) &= ~AuOptMask_UDBA; \
78 ((flags) |= AuOpt_##name); \
80 #define au_opt_clr(flags, name) do { \
81 ((flags) &= ~AuOpt_##name); \
84 static inline unsigned int au_opts_plink(unsigned int mntflags)
89 return mntflags & ~AuOpt_PLINK;
93 /* ---------------------------------------------------------------------- */
95 /* policies to select one among multiple writable branches */
97 AuWbrCreate_TDP, /* top down parent */
98 AuWbrCreate_RR, /* round robin */
99 AuWbrCreate_MFS, /* most free space */
100 AuWbrCreate_MFSV, /* mfs with seconds */
101 AuWbrCreate_MFSRR, /* mfs then rr */
102 AuWbrCreate_MFSRRV, /* mfs then rr with seconds */
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;
173 #define AuOpts_REMOUNT 1
174 #define AuOpts_REFRESH (1 << 1)
175 #define AuOpts_TRUNC_XIB (1 << 2)
176 #define AuOpts_REFRESH_DYAOP (1 << 3)
177 #define au_ftest_opts(flags, name) ((flags) & AuOpts_##name)
178 #define au_fset_opts(flags, name) \
179 do { (flags) |= AuOpts_##name; } while (0)
180 #define au_fclr_opts(flags, name) \
181 do { (flags) &= ~AuOpts_##name; } while (0)
187 unsigned int given_udba;
189 unsigned long sb_flags;
192 /* ---------------------------------------------------------------------- */
194 char *au_optstr_br_perm(int brperm);
195 const char *au_optstr_udba(int udba);
196 const char *au_optstr_wbr_copyup(int wbr_copyup);
197 const char *au_optstr_wbr_create(int wbr_create);
199 void au_opts_free(struct au_opts *opts);
200 int au_opts_parse(struct super_block *sb, char *str, struct au_opts *opts);
201 int au_opts_verify(struct super_block *sb, unsigned long sb_flags,
202 unsigned int pending);
203 int au_opts_mount(struct super_block *sb, struct au_opts *opts);
204 int au_opts_remount(struct super_block *sb, struct au_opts *opts);
206 unsigned int au_opt_udba(struct super_block *sb);
208 /* ---------------------------------------------------------------------- */
210 #endif /* __KERNEL__ */
211 #endif /* __AUFS_OPTS_H__ */