btrfs-progs: constify string arguments where appropriate
[platform/upstream/btrfs-progs.git] / qgroup.h
1 /*
2  * Copyright (C) 2012 STRATO.  All rights reserved.
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public
6  * License v2 as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
11  * General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public
14  * License along with this program; if not, write to the
15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16  * Boston, MA 021110-1307, USA.
17  */
18
19 #ifndef __BTRFS_QGROUP_H__
20 #define __BTRFS_QGROUP_H__
21
22 #include "kerncompat.h"
23 #include "ioctl.h"
24
25 struct btrfs_qgroup;
26
27 typedef int (*btrfs_qgroup_filter_func)(struct btrfs_qgroup *, u64);
28 typedef int (*btrfs_qgroup_comp_func)(struct btrfs_qgroup *,
29                                       struct btrfs_qgroup *, int);
30
31
32 struct btrfs_qgroup_filter {
33         btrfs_qgroup_filter_func filter_func;
34         u64 data;
35 };
36
37 struct btrfs_qgroup_comparer {
38         btrfs_qgroup_comp_func comp_func;
39         int is_descending;
40 };
41
42 struct btrfs_qgroup_filter_set {
43         int total;
44         int nfilters;
45         struct btrfs_qgroup_filter filters[0];
46 };
47
48 struct btrfs_qgroup_comparer_set {
49         int total;
50         int ncomps;
51         struct btrfs_qgroup_comparer comps[0];
52 };
53
54 enum btrfs_qgroup_column_enum {
55         BTRFS_QGROUP_QGROUPID,
56         BTRFS_QGROUP_RFER,
57         BTRFS_QGROUP_EXCL,
58         BTRFS_QGROUP_MAX_RFER,
59         BTRFS_QGROUP_MAX_EXCL,
60         BTRFS_QGROUP_PARENT,
61         BTRFS_QGROUP_CHILD,
62         BTRFS_QGROUP_ALL,
63 };
64
65 enum btrfs_qgroup_comp_enum {
66         BTRFS_QGROUP_COMP_QGROUPID,
67         BTRFS_QGROUP_COMP_RFER,
68         BTRFS_QGROUP_COMP_EXCL,
69         BTRFS_QGROUP_COMP_MAX_RFER,
70         BTRFS_QGROUP_COMP_MAX_EXCL,
71         BTRFS_QGROUP_COMP_MAX
72 };
73
74 enum btrfs_qgroup_filter_enum {
75         BTRFS_QGROUP_FILTER_PARENT,
76         BTRFS_QGROUP_FILTER_ALL_PARENT,
77         BTRFS_QGROUP_FILTER_MAX,
78 };
79
80 int btrfs_qgroup_parse_sort_string(const char *opt_arg,
81                                 struct btrfs_qgroup_comparer_set **comps);
82 u64 btrfs_get_path_rootid(int fd);
83 int btrfs_show_qgroups(int fd, struct btrfs_qgroup_filter_set *,
84                        struct btrfs_qgroup_comparer_set *);
85 void btrfs_qgroup_setup_print_column(enum btrfs_qgroup_column_enum column);
86 void btrfs_qgroup_setup_units(unsigned unit_mode);
87 struct btrfs_qgroup_filter_set *btrfs_qgroup_alloc_filter_set(void);
88 int btrfs_qgroup_setup_filter(struct btrfs_qgroup_filter_set **filter_set,
89                               enum btrfs_qgroup_filter_enum, u64 data);
90 struct btrfs_qgroup_comparer_set *btrfs_qgroup_alloc_comparer_set(void);
91 int btrfs_qgroup_setup_comparer(struct btrfs_qgroup_comparer_set **comp_set,
92                                 enum btrfs_qgroup_comp_enum comparer,
93                                 int is_descending);
94 int qgroup_inherit_size(struct btrfs_qgroup_inherit *p);
95 int qgroup_inherit_add_group(struct btrfs_qgroup_inherit **inherit, char *arg);
96 int qgroup_inherit_add_copy(struct btrfs_qgroup_inherit **inherit, char *arg,
97                             int type);
98
99 #endif