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fcebe456 JB |
1 | /* |
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 | */ | |
42 | enum 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, | |
47 | }; | |
48 | ||
49 | struct btrfs_qgroup_operation { | |
50 | u64 ref_root; | |
51 | u64 bytenr; | |
52 | u64 num_bytes; | |
53 | u64 seq; | |
54 | enum btrfs_qgroup_operation_type type; | |
55 | struct seq_list elem; | |
56 | struct rb_node n; | |
57 | struct list_head list; | |
58 | }; | |
59 | ||
60 | int btrfs_quota_enable(struct btrfs_trans_handle *trans, | |
61 | struct btrfs_fs_info *fs_info); | |
62 | int btrfs_quota_disable(struct btrfs_trans_handle *trans, | |
63 | struct btrfs_fs_info *fs_info); | |
64 | int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info); | |
65 | void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info); | |
66 | int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info); | |
67 | int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, | |
68 | struct btrfs_fs_info *fs_info, u64 src, u64 dst); | |
69 | int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, | |
70 | struct btrfs_fs_info *fs_info, u64 src, u64 dst); | |
71 | int btrfs_create_qgroup(struct btrfs_trans_handle *trans, | |
72 | struct btrfs_fs_info *fs_info, u64 qgroupid, | |
73 | char *name); | |
74 | int btrfs_remove_qgroup(struct btrfs_trans_handle *trans, | |
75 | struct btrfs_fs_info *fs_info, u64 qgroupid); | |
76 | int btrfs_limit_qgroup(struct btrfs_trans_handle *trans, | |
77 | struct btrfs_fs_info *fs_info, u64 qgroupid, | |
78 | struct btrfs_qgroup_limit *limit); | |
79 | int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info); | |
80 | void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info); | |
81 | struct btrfs_delayed_extent_op; | |
82 | int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans, | |
83 | struct btrfs_fs_info *fs_info, u64 ref_root, | |
84 | u64 bytenr, u64 num_bytes, | |
85 | enum btrfs_qgroup_operation_type type, | |
86 | int mod_seq); | |
87 | int btrfs_delayed_qgroup_accounting(struct btrfs_trans_handle *trans, | |
88 | struct btrfs_fs_info *fs_info); | |
89 | void btrfs_remove_qgroup_operation(struct btrfs_trans_handle *trans, | |
90 | struct btrfs_fs_info *fs_info, | |
91 | struct btrfs_qgroup_operation *oper); | |
92 | int btrfs_run_qgroups(struct btrfs_trans_handle *trans, | |
93 | struct btrfs_fs_info *fs_info); | |
94 | int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, | |
95 | struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid, | |
96 | struct btrfs_qgroup_inherit *inherit); | |
97 | int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes); | |
98 | void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes); | |
99 | ||
100 | void assert_qgroups_uptodate(struct btrfs_trans_handle *trans); | |
101 | ||
102 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS | |
103 | int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid, | |
104 | u64 rfer, u64 excl); | |
105 | #endif | |
106 | ||
107 | #endif /* __BTRFS_QGROUP__ */ |