blob: 18cc68ca309054e84ce8248d78059fe3170be3ac [file] [log] [blame]
Josef Bacikfcebe452014-05-13 17:30:47 -07001/*
2 * Copyright (C) 2014 Facebook. 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__
20#define __BTRFS_QGROUP__
21
22/*
23 * A description of the operations, all of these operations only happen when we
24 * are adding the 1st reference for that subvolume in the case of adding space
25 * or on the last reference delete in the case of subtraction. The only
26 * exception is the last one, which is added for confusion.
27 *
28 * BTRFS_QGROUP_OPER_ADD_EXCL: adding bytes where this subvolume is the only
29 * one pointing at the bytes we are adding. This is called on the first
30 * allocation.
31 *
32 * BTRFS_QGROUP_OPER_ADD_SHARED: adding bytes where this bytenr is going to be
33 * shared between subvols. This is called on the creation of a ref that already
34 * has refs from a different subvolume, so basically reflink.
35 *
36 * BTRFS_QGROUP_OPER_SUB_EXCL: removing bytes where this subvolume is the only
37 * one referencing the range.
38 *
39 * BTRFS_QGROUP_OPER_SUB_SHARED: removing bytes where this subvolume shares with
40 * refs with other subvolumes.
41 */
42enum btrfs_qgroup_operation_type {
43 BTRFS_QGROUP_OPER_ADD_EXCL,
44 BTRFS_QGROUP_OPER_ADD_SHARED,
45 BTRFS_QGROUP_OPER_SUB_EXCL,
46 BTRFS_QGROUP_OPER_SUB_SHARED,
Mark Fasheh11526512014-07-17 12:39:01 -070047 BTRFS_QGROUP_OPER_SUB_SUBTREE,
Josef Bacikfcebe452014-05-13 17:30:47 -070048};
49
50struct btrfs_qgroup_operation {
51 u64 ref_root;
52 u64 bytenr;
53 u64 num_bytes;
54 u64 seq;
55 enum btrfs_qgroup_operation_type type;
56 struct seq_list elem;
57 struct rb_node n;
58 struct list_head list;
59};
60
61int btrfs_quota_enable(struct btrfs_trans_handle *trans,
62 struct btrfs_fs_info *fs_info);
63int btrfs_quota_disable(struct btrfs_trans_handle *trans,
64 struct btrfs_fs_info *fs_info);
65int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info);
66void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info);
67int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info);
68int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
69 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
70int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
71 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
72int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
73 struct btrfs_fs_info *fs_info, u64 qgroupid,
74 char *name);
75int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
76 struct btrfs_fs_info *fs_info, u64 qgroupid);
77int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
78 struct btrfs_fs_info *fs_info, u64 qgroupid,
79 struct btrfs_qgroup_limit *limit);
80int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
81void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
82struct btrfs_delayed_extent_op;
83int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
84 struct btrfs_fs_info *fs_info, u64 ref_root,
85 u64 bytenr, u64 num_bytes,
86 enum btrfs_qgroup_operation_type type,
87 int mod_seq);
88int btrfs_delayed_qgroup_accounting(struct btrfs_trans_handle *trans,
89 struct btrfs_fs_info *fs_info);
90void btrfs_remove_qgroup_operation(struct btrfs_trans_handle *trans,
91 struct btrfs_fs_info *fs_info,
92 struct btrfs_qgroup_operation *oper);
93int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
94 struct btrfs_fs_info *fs_info);
95int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
96 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
97 struct btrfs_qgroup_inherit *inherit);
98int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
99void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
100
101void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
102
103#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
104int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid,
105 u64 rfer, u64 excl);
106#endif
107
108#endif /* __BTRFS_QGROUP__ */