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 BTRFS_QGROUP_OPER_SUB_SUBTREE, 48 }; 49 50 struct 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 61 int btrfs_quota_enable(struct btrfs_trans_handle *trans, 62 struct btrfs_fs_info *fs_info); 63 int btrfs_quota_disable(struct btrfs_trans_handle *trans, 64 struct btrfs_fs_info *fs_info); 65 int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info); 66 void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info); 67 int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info); 68 int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, 69 struct btrfs_fs_info *fs_info, u64 src, u64 dst); 70 int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, 71 struct btrfs_fs_info *fs_info, u64 src, u64 dst); 72 int btrfs_create_qgroup(struct btrfs_trans_handle *trans, 73 struct btrfs_fs_info *fs_info, u64 qgroupid); 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__ */ 108