LXR linux/fs/btrfs/qgroup.h

   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#include "ulist.h"
  23#include "delayed-ref.h"
  24
  25/*
  26 * Record a dirty extent, and info qgroup to update quota on it
  27 * TODO: Use kmem cache to alloc it.
  28 */
  29struct btrfs_qgroup_extent_record {
  30        struct rb_node node;
  31        u64 bytenr;
  32        u64 num_bytes;
  33        struct ulist *old_roots;
  34};
  35
  36/*
  37 * For qgroup event trace points only
  38 */
  39#define QGROUP_RESERVE          (1<<0)
  40#define QGROUP_RELEASE          (1<<1)
  41#define QGROUP_FREE             (1<<2)
  42
  43int btrfs_quota_enable(struct btrfs_trans_handle *trans,
  44                       struct btrfs_fs_info *fs_info);
  45int btrfs_quota_disable(struct btrfs_trans_handle *trans,
  46                        struct btrfs_fs_info *fs_info);
  47int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info);
  48void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info);
  49int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info);
  50int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
  51                              struct btrfs_fs_info *fs_info, u64 src, u64 dst);
  52int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
  53                              struct btrfs_fs_info *fs_info, u64 src, u64 dst);
  54int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
  55                        struct btrfs_fs_info *fs_info, u64 qgroupid);
  56int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
  57                              struct btrfs_fs_info *fs_info, u64 qgroupid);
  58int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
  59                       struct btrfs_fs_info *fs_info, u64 qgroupid,
  60                       struct btrfs_qgroup_limit *limit);
  61int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
  62void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
  63struct btrfs_delayed_extent_op;
  64int btrfs_qgroup_prepare_account_extents(struct btrfs_trans_handle *trans,
  65                                         struct btrfs_fs_info *fs_info);
  66struct btrfs_qgroup_extent_record
  67*btrfs_qgroup_insert_dirty_extent(struct btrfs_delayed_ref_root *delayed_refs,
  68                                  struct btrfs_qgroup_extent_record *record);
  69int
  70btrfs_qgroup_account_extent(struct btrfs_trans_handle *trans,
  71                            struct btrfs_fs_info *fs_info,
  72                            u64 bytenr, u64 num_bytes,
  73                            struct ulist *old_roots, struct ulist *new_roots);
  74int btrfs_qgroup_account_extents(struct btrfs_trans_handle *trans,
  75                                 struct btrfs_fs_info *fs_info);
  76int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
  77                      struct btrfs_fs_info *fs_info);
  78int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
  79                         struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
  80                         struct btrfs_qgroup_inherit *inherit);
  81void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
  82                               u64 ref_root, u64 num_bytes);
  83/*
  84 * TODO: Add proper trace point for it, as btrfs_qgroup_free() is
  85 * called by everywhere, can't provide good trace for delayed ref case.
  86 */
  87static inline void btrfs_qgroup_free_delayed_ref(struct btrfs_fs_info *fs_info,
  88                                                 u64 ref_root, u64 num_bytes)
  89{
  90        btrfs_qgroup_free_refroot(fs_info, ref_root, num_bytes);
  91        trace_btrfs_qgroup_free_delayed_ref(ref_root, num_bytes);
  92}
  93void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
  94
  95#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
  96int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid,
  97                               u64 rfer, u64 excl);
  98#endif
  99
 100/* New io_tree based accurate qgroup reserve API */
 101int btrfs_qgroup_reserve_data(struct inode *inode, u64 start, u64 len);
 102int btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len);
 103int btrfs_qgroup_free_data(struct inode *inode, u64 start, u64 len);
 104
 105int btrfs_qgroup_reserve_meta(struct btrfs_root *root, int num_bytes);
 106void btrfs_qgroup_free_meta_all(struct btrfs_root *root);
 107void btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes);
 108void btrfs_qgroup_check_reserved_leak(struct inode *inode);
 109#endif /* __BTRFS_QGROUP__ */
 110