| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 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 | atomic_t num_writers; |
| 31 | atomic_t use_count; |
| 32 | |
| 33 | unsigned long num_joined; |
| 34 | |
| 35 | spinlock_t commit_lock; |
| 36 | int in_commit; |
| 37 | int commit_done; |
| 38 | int blocked; |
| 39 | struct list_head list; |
| 40 | struct extent_io_tree dirty_pages; |
| 41 | unsigned long start_time; |
| 42 | wait_queue_head_t writer_wait; |
| 43 | wait_queue_head_t commit_wait; |
| 44 | struct list_head pending_snapshots; |
| 45 | struct btrfs_delayed_ref_root delayed_refs; |
| 46 | int aborted; |
| 47 | }; |
| 48 | |
| 49 | struct btrfs_trans_handle { |
| 50 | u64 transid; |
| 51 | u64 bytes_reserved; |
| 52 | unsigned long use_count; |
| 53 | unsigned long blocks_reserved; |
| 54 | unsigned long blocks_used; |
| 55 | unsigned long delayed_ref_updates; |
| 56 | struct btrfs_transaction *transaction; |
| 57 | struct btrfs_block_rsv *block_rsv; |
| 58 | struct btrfs_block_rsv *orig_rsv; |
| 59 | int aborted; |
| 60 | }; |
| 61 | |
| 62 | struct btrfs_pending_snapshot { |
| 63 | struct dentry *dentry; |
| 64 | struct btrfs_root *root; |
| 65 | struct btrfs_root *snap; |
| 66 | /* block reservation for the operation */ |
| 67 | struct btrfs_block_rsv block_rsv; |
| 68 | /* extra metadata reseration for relocation */ |
| 69 | int error; |
| 70 | bool readonly; |
| 71 | struct list_head list; |
| 72 | }; |
| 73 | |
| 74 | static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans, |
| 75 | struct inode *inode) |
| 76 | { |
| 77 | BTRFS_I(inode)->last_trans = trans->transaction->transid; |
| 78 | BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid; |
| 79 | } |
| 80 | |
| 81 | int btrfs_end_transaction(struct btrfs_trans_handle *trans, |
| 82 | struct btrfs_root *root); |
| 83 | int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans, |
| 84 | struct btrfs_root *root); |
| 85 | struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, |
| 86 | int num_items); |
| 87 | struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root); |
| 88 | struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root); |
| 89 | struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root); |
| 90 | int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid); |
| 91 | int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans, |
| 92 | struct btrfs_root *root); |
| 93 | |
| 94 | int btrfs_add_dead_root(struct btrfs_root *root); |
| 95 | int btrfs_defrag_root(struct btrfs_root *root, int cacheonly); |
| 96 | int btrfs_clean_old_snapshots(struct btrfs_root *root); |
| 97 | int btrfs_commit_transaction(struct btrfs_trans_handle *trans, |
| 98 | struct btrfs_root *root); |
| 99 | int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, |
| 100 | struct btrfs_root *root, |
| 101 | int wait_for_unblock); |
| 102 | int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, |
| 103 | struct btrfs_root *root); |
| 104 | int btrfs_end_transaction_dmeta(struct btrfs_trans_handle *trans, |
| 105 | struct btrfs_root *root); |
| 106 | int btrfs_should_end_transaction(struct btrfs_trans_handle *trans, |
| 107 | struct btrfs_root *root); |
| 108 | void btrfs_throttle(struct btrfs_root *root); |
| 109 | int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans, |
| 110 | struct btrfs_root *root); |
| 111 | int btrfs_write_and_wait_marked_extents(struct btrfs_root *root, |
| 112 | struct extent_io_tree *dirty_pages, int mark); |
| 113 | int btrfs_write_marked_extents(struct btrfs_root *root, |
| 114 | struct extent_io_tree *dirty_pages, int mark); |
| 115 | int btrfs_wait_marked_extents(struct btrfs_root *root, |
| 116 | struct extent_io_tree *dirty_pages, int mark); |
| 117 | int btrfs_transaction_blocked(struct btrfs_fs_info *info); |
| 118 | int btrfs_transaction_in_commit(struct btrfs_fs_info *info); |
| 119 | void put_transaction(struct btrfs_transaction *transaction); |
| 120 | #endif |