| Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 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__ */ |