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  */
  29 struct btrfs_qgroup_extent_record {
  30         struct rb_node node;
  31         u64 bytenr;
  32         u64 num_bytes;
  33         struct ulist *old_roots;
  34 };
  35
  36 int btrfs_quota_enable(struct btrfs_trans_handle *trans,
  37                        struct btrfs_fs_info *fs_info);
  38 int btrfs_quota_disable(struct btrfs_trans_handle *trans,
  39                         struct btrfs_fs_info *fs_info);
  40 int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info);
  41 void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info);
  42 int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info);
  43 int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
  44                               struct btrfs_fs_info *fs_info, u64 src, u64 dst);
  45 int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
  46                               struct btrfs_fs_info *fs_info, u64 src, u64 dst);
  47 int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
  48                         struct btrfs_fs_info *fs_info, u64 qgroupid);
  49 int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
  50                               struct btrfs_fs_info *fs_info, u64 qgroupid);
  51 int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
  52                        struct btrfs_fs_info *fs_info, u64 qgroupid,
  53                        struct btrfs_qgroup_limit *limit);
  54 int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
  55 void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
  56 struct btrfs_delayed_extent_op;
  57 int btrfs_qgroup_prepare_account_extents(struct btrfs_trans_handle *trans,
  58                                          struct btrfs_fs_info *fs_info);
  59 struct btrfs_qgroup_extent_record
  60 *btrfs_qgroup_insert_dirty_extent(struct btrfs_delayed_ref_root *delayed_refs,
  61                                   struct btrfs_qgroup_extent_record *record);
  62 int
  63 btrfs_qgroup_account_extent(struct btrfs_trans_handle *trans,
  64                             struct btrfs_fs_info *fs_info,
  65                             u64 bytenr, u64 num_bytes,
  66                             struct ulist *old_roots, struct ulist *new_roots);
  67 int btrfs_qgroup_account_extents(struct btrfs_trans_handle *trans,
  68                                  struct btrfs_fs_info *fs_info);
  69 int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
  70                       struct btrfs_fs_info *fs_info);
  71 int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
  72                          struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
  73                          struct btrfs_qgroup_inherit *inherit);
  74 int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
  75 void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
  76                                u64 ref_root, u64 num_bytes);
  77 static inline void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes)
  78 {
  79         return btrfs_qgroup_free_refroot(root->fs_info, root->objectid,
  80                                          num_bytes);
  81 }
  82
  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  */
  87 static 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 }
  92
  93 void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
  94
  95 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
  96 int 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 */
 101 int btrfs_qgroup_reserve_data(struct inode *inode, u64 start, u64 len);
 102 int btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len);
 103 int btrfs_qgroup_free_data(struct inode *inode, u64 start, u64 len);
 104 #endif /* __BTRFS_QGROUP__ */