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(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