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 list_head ordered_operations; 47 struct btrfs_delayed_ref_root delayed_refs; 48 int aborted; 49 }; 50 51 enum btrfs_trans_type { 52 TRANS_START, 53 TRANS_JOIN, 54 TRANS_USERSPACE, 55 TRANS_JOIN_NOLOCK, 56 TRANS_ATTACH, 57 }; 58 59 struct btrfs_trans_handle { 60 u64 transid; 61 u64 bytes_reserved; 62 u64 qgroup_reserved; 63 unsigned long use_count; 64 unsigned long blocks_reserved; 65 unsigned long blocks_used; 66 unsigned long delayed_ref_updates; 67 struct btrfs_transaction *transaction; 68 struct btrfs_block_rsv *block_rsv; 69 struct btrfs_block_rsv *orig_rsv; 70 short aborted; 71 short adding_csums; 72 bool allocating_chunk; 73 enum btrfs_trans_type type; 74 /* 75 * this root is only needed to validate that the root passed to 76 * start_transaction is the same as the one passed to end_transaction. 77 * Subvolume quota depends on this 78 */ 79 struct btrfs_root *root; 80 struct seq_list delayed_ref_elem; 81 struct list_head qgroup_ref_list; 82 struct list_head new_bgs; 83 }; 84 85 struct btrfs_pending_snapshot { 86 struct dentry *dentry; 87 struct inode *dir; 88 struct btrfs_root *root; 89 struct btrfs_root *snap; 90 struct btrfs_qgroup_inherit *inherit; 91 /* block reservation for the operation */ 92 struct btrfs_block_rsv block_rsv; 93 /* extra metadata reseration for relocation */ 94 int error; 95 bool readonly; 96 struct list_head list; 97 }; 98 99 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans, 100 struct inode *inode) 101 { 102 BTRFS_I(inode)->last_trans = trans->transaction->transid; 103 BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid; 104 BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->root->last_log_commit; 105 } 106 107 int btrfs_end_transaction(struct btrfs_trans_handle *trans, 108 struct btrfs_root *root); 109 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, 110 int num_items); 111 struct btrfs_trans_handle *btrfs_start_transaction_lflush( 112 struct btrfs_root *root, int num_items); 113 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root); 114 struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root); 115 struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root); 116 struct btrfs_trans_handle *btrfs_attach_transaction_barrier( 117 struct btrfs_root *root); 118 struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root); 119 int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid); 120 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans, 121 struct btrfs_root *root); 122 123 int btrfs_add_dead_root(struct btrfs_root *root); 124 int btrfs_defrag_root(struct btrfs_root *root); 125 int btrfs_clean_old_snapshots(struct btrfs_root *root); 126 int btrfs_commit_transaction(struct btrfs_trans_handle *trans, 127 struct btrfs_root *root); 128 int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, 129 struct btrfs_root *root, 130 int wait_for_unblock); 131 int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, 132 struct btrfs_root *root); 133 int btrfs_end_transaction_dmeta(struct btrfs_trans_handle *trans, 134 struct btrfs_root *root); 135 int btrfs_should_end_transaction(struct btrfs_trans_handle *trans, 136 struct btrfs_root *root); 137 void btrfs_throttle(struct btrfs_root *root); 138 int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans, 139 struct btrfs_root *root); 140 int btrfs_write_and_wait_marked_extents(struct btrfs_root *root, 141 struct extent_io_tree *dirty_pages, int mark); 142 int btrfs_write_marked_extents(struct btrfs_root *root, 143 struct extent_io_tree *dirty_pages, int mark); 144 int btrfs_wait_marked_extents(struct btrfs_root *root, 145 struct extent_io_tree *dirty_pages, int mark); 146 int btrfs_transaction_blocked(struct btrfs_fs_info *info); 147 int btrfs_transaction_in_commit(struct btrfs_fs_info *info); 148 void put_transaction(struct btrfs_transaction *transaction); 149 #endif 150