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