2 * Copyright (C) 2014 Facebook. All rights reserved.
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.
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.
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.
19 #ifndef __BTRFS_QGROUP__
20 #define __BTRFS_QGROUP__
23 #include "delayed-ref.h"
26 * A description of the operations, all of these operations only happen when we
27 * are adding the 1st reference for that subvolume in the case of adding space
28 * or on the last reference delete in the case of subtraction. The only
29 * exception is the last one, which is added for confusion.
31 * BTRFS_QGROUP_OPER_ADD_EXCL: adding bytes where this subvolume is the only
32 * one pointing at the bytes we are adding. This is called on the first
35 * BTRFS_QGROUP_OPER_ADD_SHARED: adding bytes where this bytenr is going to be
36 * shared between subvols. This is called on the creation of a ref that already
37 * has refs from a different subvolume, so basically reflink.
39 * BTRFS_QGROUP_OPER_SUB_EXCL: removing bytes where this subvolume is the only
40 * one referencing the range.
42 * BTRFS_QGROUP_OPER_SUB_SHARED: removing bytes where this subvolume shares with
43 * refs with other subvolumes.
45 enum btrfs_qgroup_operation_type
{
46 BTRFS_QGROUP_OPER_ADD_EXCL
,
47 BTRFS_QGROUP_OPER_ADD_SHARED
,
48 BTRFS_QGROUP_OPER_SUB_EXCL
,
49 BTRFS_QGROUP_OPER_SUB_SHARED
,
50 BTRFS_QGROUP_OPER_SUB_SUBTREE
,
53 struct btrfs_qgroup_operation
{
58 enum btrfs_qgroup_operation_type type
;
61 struct list_head list
;
65 * Record a dirty extent, and info qgroup to update quota on it
66 * TODO: Use kmem cache to alloc it.
68 struct btrfs_qgroup_extent_record
{
72 struct ulist
*old_roots
;
75 int btrfs_quota_enable(struct btrfs_trans_handle
*trans
,
76 struct btrfs_fs_info
*fs_info
);
77 int btrfs_quota_disable(struct btrfs_trans_handle
*trans
,
78 struct btrfs_fs_info
*fs_info
);
79 int btrfs_qgroup_rescan(struct btrfs_fs_info
*fs_info
);
80 void btrfs_qgroup_rescan_resume(struct btrfs_fs_info
*fs_info
);
81 int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info
*fs_info
);
82 int btrfs_add_qgroup_relation(struct btrfs_trans_handle
*trans
,
83 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
84 int btrfs_del_qgroup_relation(struct btrfs_trans_handle
*trans
,
85 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
86 int btrfs_create_qgroup(struct btrfs_trans_handle
*trans
,
87 struct btrfs_fs_info
*fs_info
, u64 qgroupid
);
88 int btrfs_remove_qgroup(struct btrfs_trans_handle
*trans
,
89 struct btrfs_fs_info
*fs_info
, u64 qgroupid
);
90 int btrfs_limit_qgroup(struct btrfs_trans_handle
*trans
,
91 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
92 struct btrfs_qgroup_limit
*limit
);
93 int btrfs_read_qgroup_config(struct btrfs_fs_info
*fs_info
);
94 void btrfs_free_qgroup_config(struct btrfs_fs_info
*fs_info
);
95 struct btrfs_delayed_extent_op
;
96 int btrfs_qgroup_record_ref(struct btrfs_trans_handle
*trans
,
97 struct btrfs_fs_info
*fs_info
, u64 ref_root
,
98 u64 bytenr
, u64 num_bytes
,
99 enum btrfs_qgroup_operation_type type
,
101 struct btrfs_qgroup_extent_record
102 *btrfs_qgroup_insert_dirty_extent(struct btrfs_delayed_ref_root
*delayed_refs
,
103 struct btrfs_qgroup_extent_record
*record
);
104 int btrfs_delayed_qgroup_accounting(struct btrfs_trans_handle
*trans
,
105 struct btrfs_fs_info
*fs_info
);
106 void btrfs_remove_qgroup_operation(struct btrfs_trans_handle
*trans
,
107 struct btrfs_fs_info
*fs_info
,
108 struct btrfs_qgroup_operation
*oper
);
109 int btrfs_run_qgroups(struct btrfs_trans_handle
*trans
,
110 struct btrfs_fs_info
*fs_info
);
111 int btrfs_qgroup_inherit(struct btrfs_trans_handle
*trans
,
112 struct btrfs_fs_info
*fs_info
, u64 srcid
, u64 objectid
,
113 struct btrfs_qgroup_inherit
*inherit
);
114 int btrfs_qgroup_reserve(struct btrfs_root
*root
, u64 num_bytes
);
115 void btrfs_qgroup_free(struct btrfs_root
*root
, u64 num_bytes
);
117 void assert_qgroups_uptodate(struct btrfs_trans_handle
*trans
);
119 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
120 int btrfs_verify_qgroup_counts(struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
124 #endif /* __BTRFS_QGROUP__ */