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 107