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 "delayed-ref.h" 23 24 struct btrfs_transaction { 25 u64 transid; 26 /* 27 * total writers in this transaction, it must be zero before the 28 * transaction can end 29 */ 30 unsigned long num_writers; 31 32 unsigned long num_joined; 33 int in_commit; 34 int use_count; 35 int commit_done; 36 int blocked; 37 struct list_head list; 38 struct extent_io_tree dirty_pages; 39 unsigned long start_time; 40 wait_queue_head_t writer_wait; 41 wait_queue_head_t commit_wait; 42 struct list_head pending_snapshots; 43 struct btrfs_delayed_ref_root delayed_refs; 44 }; 45 46 struct btrfs_trans_handle { 47 u64 transid; 48 unsigned long blocks_reserved; 49 unsigned long blocks_used; 50 struct btrfs_transaction *transaction; 51 u64 block_group; 52 u64 alloc_exclude_start; 53 u64 alloc_exclude_nr; 54 unsigned long delayed_ref_updates; 55 }; 56 57 struct btrfs_pending_snapshot { 58 struct dentry *dentry; 59 struct btrfs_root *root; 60 char *name; 61 struct btrfs_key root_key; 62 struct list_head list; 63 }; 64 65 static inline void btrfs_set_trans_block_group(struct btrfs_trans_handle *trans, 66 struct inode *inode) 67 { 68 trans->block_group = BTRFS_I(inode)->block_group; 69 } 70 71 static inline void btrfs_update_inode_block_group( 72 struct btrfs_trans_handle *trans, 73 struct inode *inode) 74 { 75 BTRFS_I(inode)->block_group = trans->block_group; 76 } 77 78 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans, 79 struct inode *inode) 80 { 81 BTRFS_I(inode)->last_trans = trans->transaction->transid; 82 } 83 84 int btrfs_end_transaction(struct btrfs_trans_handle *trans, 85 struct btrfs_root *root); 86 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, 87 int num_blocks); 88 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root, 89 int num_blocks); 90 struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *r, 91 int num_blocks); 92 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans, 93 struct btrfs_root *root); 94 int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans, 95 struct btrfs_root *root); 96 97 int btrfs_add_dead_root(struct btrfs_root *root); 98 int btrfs_drop_dead_root(struct btrfs_root *root); 99 int btrfs_defrag_root(struct btrfs_root *root, int cacheonly); 100 int btrfs_clean_old_snapshots(struct btrfs_root *root); 101 int btrfs_commit_transaction(struct btrfs_trans_handle *trans, 102 struct btrfs_root *root); 103 int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, 104 struct btrfs_root *root); 105 void btrfs_throttle(struct btrfs_root *root); 106 int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans, 107 struct btrfs_root *root); 108 int btrfs_write_and_wait_marked_extents(struct btrfs_root *root, 109 struct extent_io_tree *dirty_pages); 110 int btrfs_transaction_in_commit(struct btrfs_fs_info *info); 111 #endif 112