fs/btrfs/transaction.h

   1 /*
   2  * Copyright (C) 2007 Oracle.  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 __TRANSACTION__
  20 #define __TRANSACTION__
  21 #include "btrfs_inode.h"
  22
  23 struct btrfs_transaction {
  24         u64 transid;
  25         unsigned long num_writers;
  26         int in_commit;
  27         int use_count;
  28         int commit_done;
  29         struct list_head list;
  30         struct radix_tree_root dirty_pages;
  31         unsigned long start_time;
  32         wait_queue_head_t writer_wait;
  33         wait_queue_head_t commit_wait;
  34 };
  35
  36 struct btrfs_trans_handle {
  37         u64 transid;
  38         unsigned long blocks_reserved;
  39         unsigned long blocks_used;
  40         struct btrfs_transaction *transaction;
  41         struct btrfs_block_group_cache *block_group;
  42 };
  43
  44
  45 static inline void btrfs_set_trans_block_group(struct btrfs_trans_handle *trans,
  46                                                struct inode *inode)
  47 {
  48         trans->block_group = BTRFS_I(inode)->block_group;
  49 }
  50
  51 static inline void btrfs_update_inode_block_group(struct
  52                                                   btrfs_trans_handle *trans,
  53                                                   struct inode *inode)
  54 {
  55         BTRFS_I(inode)->block_group = trans->block_group;
  56 }
  57
  58 int btrfs_end_transaction(struct btrfs_trans_handle *trans,
  59                           struct btrfs_root *root);
  60 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
  61                                                    int num_blocks);
  62 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
  63                                      struct btrfs_root *root);
  64 int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
  65                             struct btrfs_root *root);
  66
  67 void btrfs_transaction_cleaner(struct work_struct *work);
  68 void btrfs_transaction_flush_work(struct btrfs_root *root);
  69 void btrfs_transaction_queue_work(struct btrfs_root *root, int delay);
  70 void btrfs_init_transaction_sys(void);
  71 void btrfs_exit_transaction_sys(void);
  72 int btrfs_add_dead_root(struct btrfs_root *root, struct list_head *dead_list);
  73 int btrfs_defrag_dirty_roots(struct btrfs_fs_info *info);
  74
  75 #endif