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