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 #include "ctree.h" 24 25 struct btrfs_transaction { 26 u64 transid; 27 /* 28 * total writers in this transaction, it must be zero before the 29 * transaction can end 30 */ 31 atomic_t num_writers; 32 atomic_t use_count; 33 34 unsigned long num_joined; 35 36 spinlock_t commit_lock; 37 int in_commit; 38 int commit_done; 39 int blocked; 40 struct list_head list; 41 struct extent_io_tree dirty_pages; 42 unsigned long start_time; 43 wait_queue_head_t writer_wait; 44 wait_queue_head_t commit_wait; 45 struct list_head pending_snapshots; 46 struct btrfs_delayed_ref_root delayed_refs; 47 int aborted; 48 }; 49 50 struct btrfs_trans_handle { 51 u64 transid; 52 u64 bytes_reserved; 53 u64 qgroup_reserved; 54 unsigned long use_count; 55 unsigned long blocks_reserved; 56 unsigned long blocks_used; 57 unsigned long delayed_ref_updates; 58 struct btrfs_transaction *transaction; 59 struct btrfs_block_rsv *block_rsv; 60 struct btrfs_block_rsv *orig_rsv; 61 int aborted; 62 int adding_csums; 63 /* 64 * this root is only needed to validate that the root passed to 65 * start_transaction is the same as the one passed to end_transaction. 66 * Subvolume quota depends on this 67 */ 68 struct btrfs_root *root; 69 struct seq_list delayed_ref_elem; 70 struct list_head qgroup_ref_list; 71 }; 72 73 struct btrfs_pending_snapshot { 74 struct dentry *dentry; 75 struct btrfs_root *root; 76 struct btrfs_root *snap; 77 struct btrfs_qgroup_inherit *inherit; 78 /* block reservation for the operation */ 79 struct btrfs_block_rsv block_rsv; 80 /* extra metadata reseration for relocation */ 81 int error; 82 bool readonly; 83 struct list_head list; 84 }; 85 86 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans, 87 struct inode *inode) 88 { 89 BTRFS_I(inode)->last_trans = trans->transaction->transid; 90 BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid; 91 } 92 93 int btrfs_end_transaction(struct btrfs_trans_handle *trans, 94 struct btrfs_root *root); 95 int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans, 96 struct btrfs_root *root); 97 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, 98 int num_items); 99 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root); 100 struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root); 101 struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root); 102 int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid); 103 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans, 104 struct btrfs_root *root); 105 106 int btrfs_add_dead_root(struct btrfs_root *root); 107 int btrfs_defrag_root(struct btrfs_root *root, int cacheonly); 108 int btrfs_clean_old_snapshots(struct btrfs_root *root); 109 int btrfs_commit_transaction(struct btrfs_trans_handle *trans, 110 struct btrfs_root *root); 111 int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, 112 struct btrfs_root *root, 113 int wait_for_unblock); 114 int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, 115 struct btrfs_root *root); 116 int btrfs_end_transaction_dmeta(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 void put_transaction(struct btrfs_transaction *transaction); 132 #endif 133