/* * Copyright (C) 2014 Facebook. All rights reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License v2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this program; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ #ifndef __BTRFS_QGROUP__ #define __BTRFS_QGROUP__ #include "ulist.h" #include "delayed-ref.h" /* * A description of the operations, all of these operations only happen when we * are adding the 1st reference for that subvolume in the case of adding space * or on the last reference delete in the case of subtraction. The only * exception is the last one, which is added for confusion. * * BTRFS_QGROUP_OPER_ADD_EXCL: adding bytes where this subvolume is the only * one pointing at the bytes we are adding. This is called on the first * allocation. * * BTRFS_QGROUP_OPER_ADD_SHARED: adding bytes where this bytenr is going to be * shared between subvols. This is called on the creation of a ref that already * has refs from a different subvolume, so basically reflink. * * BTRFS_QGROUP_OPER_SUB_EXCL: removing bytes where this subvolume is the only * one referencing the range. * * BTRFS_QGROUP_OPER_SUB_SHARED: removing bytes where this subvolume shares with * refs with other subvolumes. */ enum btrfs_qgroup_operation_type { BTRFS_QGROUP_OPER_ADD_EXCL, BTRFS_QGROUP_OPER_ADD_SHARED, BTRFS_QGROUP_OPER_SUB_EXCL, BTRFS_QGROUP_OPER_SUB_SHARED, BTRFS_QGROUP_OPER_SUB_SUBTREE, }; struct btrfs_qgroup_operation { u64 ref_root; u64 bytenr; u64 num_bytes; u64 seq; enum btrfs_qgroup_operation_type type; struct seq_list elem; struct rb_node n; struct list_head list; }; /* * Record a dirty extent, and info qgroup to update quota on it * TODO: Use kmem cache to alloc it. */ struct btrfs_qgroup_extent_record { struct rb_node node; u64 bytenr; u64 num_bytes; struct ulist *old_roots; }; int btrfs_quota_enable(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info); int btrfs_quota_disable(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info); int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info); void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info); int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info); int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, u64 src, u64 dst); int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, u64 src, u64 dst); int btrfs_create_qgroup(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, u64 qgroupid); int btrfs_remove_qgroup(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, u64 qgroupid); int btrfs_limit_qgroup(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, u64 qgroupid, struct btrfs_qgroup_limit *limit); int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info); void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info); struct btrfs_delayed_extent_op; int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, u64 ref_root, u64 bytenr, u64 num_bytes, enum btrfs_qgroup_operation_type type, int mod_seq); int btrfs_qgroup_prepare_account_extents(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info); struct btrfs_qgroup_extent_record *btrfs_qgroup_insert_dirty_extent(struct btrfs_delayed_ref_root *delayed_refs, struct btrfs_qgroup_extent_record *record); int btrfs_delayed_qgroup_accounting(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info); void btrfs_remove_qgroup_operation(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, struct btrfs_qgroup_operation *oper); int btrfs_run_qgroups(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info); int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid, struct btrfs_qgroup_inherit *inherit); int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes); void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes); void assert_qgroups_uptodate(struct btrfs_trans_handle *trans); #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid, u64 rfer, u64 excl); #endif #endif /* __BTRFS_QGROUP__ */