kernel/2.6.29.6-aldebaran-rt/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
  23 struct btrfs_transaction {
  24         u64 transid;
  25         unsigned long num_writers;
  26         unsigned long num_joined;
  27         int in_commit;
  28         int use_count;
  29         int commit_done;
  30         int blocked;
  31         struct list_head list;
  32         struct extent_io_tree dirty_pages;
  33         unsigned long start_time;
  34         wait_queue_head_t writer_wait;
  35         wait_queue_head_t commit_wait;
  36         struct list_head pending_snapshots;
  37 };
  38
  39 struct btrfs_trans_handle {
  40         u64 transid;
  41         unsigned long blocks_reserved;
  42         unsigned long blocks_used;
  43         struct btrfs_transaction *transaction;
  44         u64 block_group;
  45         u64 alloc_exclude_start;
  46         u64 alloc_exclude_nr;
  47 };
  48
  49 struct btrfs_pending_snapshot {
  50         struct dentry *dentry;
  51         struct btrfs_root *root;
  52         char *name;
  53         struct btrfs_key root_key;
  54         struct list_head list;
  55 };
  56
  57 struct btrfs_dirty_root {
  58         struct list_head list;
  59         struct btrfs_root *root;
  60         struct btrfs_root *latest_root;
  61 };
  62
  63 static inline void btrfs_set_trans_block_group(struct btrfs_trans_handle *trans,
  64                                                struct inode *inode)
  65 {
  66         trans->block_group = BTRFS_I(inode)->block_group;
  67 }
  68
  69 static inline void btrfs_update_inode_block_group(
  70                                           struct btrfs_trans_handle *trans,
  71                                           struct inode *inode)
  72 {
  73         BTRFS_I(inode)->block_group = trans->block_group;
  74 }
  75
  76 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
  77                                               struct inode *inode)
  78 {
  79         BTRFS_I(inode)->last_trans = trans->transaction->transid;
  80 }
  81
  82 int btrfs_end_transaction(struct btrfs_trans_handle *trans,
  83                           struct btrfs_root *root);
  84 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
  85                                                    int num_blocks);
  86 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root,
  87                                                    int num_blocks);
  88 struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *r,
  89                                                    int num_blocks);
  90 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
  91                                      struct btrfs_root *root);
  92 int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
  93                             struct btrfs_root *root);
  94
  95 int btrfs_add_dead_root(struct btrfs_root *root, struct btrfs_root *latest);
  96 int btrfs_defrag_root(struct btrfs_root *root, int cacheonly);
  97 int btrfs_clean_old_snapshots(struct btrfs_root *root);
  98 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
  99                              struct btrfs_root *root);
 100 int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
 101                                    struct btrfs_root *root);
 102 void btrfs_throttle(struct btrfs_root *root);
 103 int btrfs_record_root_in_trans(struct btrfs_root *root);
 104 int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
 105                                         struct extent_io_tree *dirty_pages);
 106 #endif