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 u64 block_group; 49 u64 bytes_reserved; 50 unsigned long blocks_reserved; 51 unsigned long blocks_used; 52 unsigned long delayed_ref_updates; 53 struct btrfs_transaction *transaction; 54 struct btrfs_block_rsv *block_rsv; 55 }; 56 57 struct btrfs_pending_snapshot { 58 struct dentry *dentry; 59 struct btrfs_root *root; 60 struct btrfs_root *snap; 61 /* block reservation for the operation */ 62 struct btrfs_block_rsv block_rsv; 63 /* extra metadata reseration for relocation */ 64 int error; 65 struct list_head list; 66 }; 67 68 static inline void btrfs_set_trans_block_group(struct btrfs_trans_handle *trans, 69 struct inode *inode) 70 { 71 trans->block_group = BTRFS_I(inode)->block_group; 72 } 73 74 static inline void btrfs_update_inode_block_group( 75 struct btrfs_trans_handle *trans, 76 struct inode *inode) 77 { 78 BTRFS_I(inode)->block_group = trans->block_group; 79 } 80 81 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans, 82 struct inode *inode) 83 { 84 BTRFS_I(inode)->last_trans = trans->transaction->transid; 85 BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid; 86 } 87 88 int btrfs_end_transaction(struct btrfs_trans_handle *trans, 89 struct btrfs_root *root); 90 int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans, 91 struct btrfs_root *root); 92 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, 93 int num_items); 94 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root, 95 int num_blocks); 96 struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root, 97 int num_blocks); 98 struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *r, 99 int num_blocks); 100 int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid); 101 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans, 102 struct btrfs_root *root); 103 int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans, 104 struct btrfs_root *root); 105 106 int btrfs_add_dead_root(struct btrfs_root *root); 107 int btrfs_drop_dead_root(struct btrfs_root *root); 108 int btrfs_defrag_root(struct btrfs_root *root, int cacheonly); 109 int btrfs_clean_old_snapshots(struct btrfs_root *root); 110 int btrfs_commit_transaction(struct btrfs_trans_handle *trans, 111 struct btrfs_root *root); 112 int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, 113 struct btrfs_root *root, 114 int wait_for_unblock); 115 int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, 116 struct btrfs_root *root); 117 int btrfs_should_end_transaction(struct btrfs_trans_handle *trans, 118 struct btrfs_root *root); 119 void btrfs_throttle(struct btrfs_root *root); 120 int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans, 121 struct btrfs_root *root); 122 int btrfs_write_and_wait_marked_extents(struct btrfs_root *root, 123 struct extent_io_tree *dirty_pages, int mark); 124 int btrfs_write_marked_extents(struct btrfs_root *root, 125 struct extent_io_tree *dirty_pages, int mark); 126 int btrfs_wait_marked_extents(struct btrfs_root *root, 127 struct extent_io_tree *dirty_pages, int mark); 128 int btrfs_transaction_blocked(struct btrfs_fs_info *info); 129 int btrfs_transaction_in_commit(struct btrfs_fs_info *info); 130 #endif 131