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 bool readonly; 66 struct list_head list; 67 }; 68 69 static inline void btrfs_set_trans_block_group(struct btrfs_trans_handle *trans, 70 struct inode *inode) 71 { 72 trans->block_group = BTRFS_I(inode)->block_group; 73 } 74 75 static inline void btrfs_update_inode_block_group( 76 struct btrfs_trans_handle *trans, 77 struct inode *inode) 78 { 79 BTRFS_I(inode)->block_group = trans->block_group; 80 } 81 82 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans, 83 struct inode *inode) 84 { 85 BTRFS_I(inode)->last_trans = trans->transaction->transid; 86 BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid; 87 } 88 89 int btrfs_end_transaction(struct btrfs_trans_handle *trans, 90 struct btrfs_root *root); 91 int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans, 92 struct btrfs_root *root); 93 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, 94 int num_items); 95 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root, 96 int num_blocks); 97 struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root, 98 int num_blocks); 99 struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *r, 100 int num_blocks); 101 int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid); 102 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans, 103 struct btrfs_root *root); 104 int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans, 105 struct btrfs_root *root); 106 107 int btrfs_add_dead_root(struct btrfs_root *root); 108 int btrfs_drop_dead_root(struct btrfs_root *root); 109 int btrfs_defrag_root(struct btrfs_root *root, int cacheonly); 110 int btrfs_clean_old_snapshots(struct btrfs_root *root); 111 int btrfs_commit_transaction(struct btrfs_trans_handle *trans, 112 struct btrfs_root *root); 113 int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, 114 struct btrfs_root *root, 115 int wait_for_unblock); 116 int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, 117 struct btrfs_root *root); 118 int btrfs_should_end_transaction(struct btrfs_trans_handle *trans, 119 struct btrfs_root *root); 120 void btrfs_throttle(struct btrfs_root *root); 121 int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans, 122 struct btrfs_root *root); 123 int btrfs_write_and_wait_marked_extents(struct btrfs_root *root, 124 struct extent_io_tree *dirty_pages, int mark); 125 int btrfs_write_marked_extents(struct btrfs_root *root, 126 struct extent_io_tree *dirty_pages, int mark); 127 int btrfs_wait_marked_extents(struct btrfs_root *root, 128 struct extent_io_tree *dirty_pages, int mark); 129 int btrfs_transaction_blocked(struct btrfs_fs_info *info); 130 int btrfs_transaction_in_commit(struct btrfs_fs_info *info); 131 #endif 132