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 __BTRFS_TRANSACTION__
  20 #define __BTRFS_TRANSACTION__
  21 #include "btrfs_inode.h"
  22 #include "ordered-data.h"
  23
  24 struct btrfs_transaction {
  25         u64 transid;
  26         unsigned long num_writers;
  27         unsigned long num_joined;
  28         int in_commit;
  29         int use_count;
  30         int commit_done;
  31         struct list_head list;
  32         struct extent_io_tree dirty_pages;
  33         unsigned long start_time;
  34         struct btrfs_ordered_inode_tree ordered_inode_tree;
  35         wait_queue_head_t writer_wait;
  36         wait_queue_head_t commit_wait;
  37         struct list_head pending_snapshots;
  38 };
  39
  40 struct btrfs_trans_handle {
  41         u64 transid;
  42         unsigned long blocks_reserved;
  43         unsigned long blocks_used;
  44         struct btrfs_transaction *transaction;
  45         struct btrfs_block_group_cache *block_group;
  46         u64 alloc_exclude_start;
  47         u64 alloc_exclude_nr;
  48 };
  49
  50 struct btrfs_pending_snapshot {
  51         struct btrfs_root *root;
  52         char *name;
  53         struct list_head list;
  54 };
  55
  56
  57 static inline void btrfs_set_trans_block_group(struct btrfs_trans_handle *trans,
  58                                                struct inode *inode)
  59 {
  60         trans->block_group = BTRFS_I(inode)->block_group;
  61 }
  62
  63 static inline void btrfs_update_inode_block_group(struct
  64                                                   btrfs_trans_handle *trans,
  65                                                   struct inode *inode)
  66 {
  67         BTRFS_I(inode)->block_group = trans->block_group;
  68 }
  69
  70 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
  71                                               struct inode *inode)
  72 {
  73         BTRFS_I(inode)->last_trans = trans->transaction->transid;
  74 }
  75
  76 int btrfs_end_transaction(struct btrfs_trans_handle *trans,
  77                           struct btrfs_root *root);
  78 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
  79                                                    int num_blocks);
  80 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
  81                                      struct btrfs_root *root);
  82 int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
  83                             struct btrfs_root *root);
  84
  85 int btrfs_add_dead_root(struct btrfs_root *root, struct btrfs_root *latest,
  86                         struct list_head *dead_list);
  87 int btrfs_defrag_dirty_roots(struct btrfs_fs_info *info);
  88 int btrfs_defrag_root(struct btrfs_root *root, int cacheonly);
  89 int btrfs_clean_old_snapshots(struct btrfs_root *root);
  90 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
  91                              struct btrfs_root *root);
  92 int btrfs_write_ordered_inodes(struct btrfs_trans_handle *trans,
  93                                 struct btrfs_root *root);
  94 int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
  95                                    struct btrfs_root *root);
  96 #endif