tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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
24struct 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
46struct 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
57struct 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 struct list_head list;
66};
67
68static inline void btrfs_set_trans_block_group(struct btrfs_trans_handle *trans,
69 struct inode *inode)
70{
71 trans->block_group = BTRFS_I(inode)->block_group;
72}
73
74static inline void btrfs_update_inode_block_group(
75 struct btrfs_trans_handle *trans,
76 struct inode *inode)
77{
78 BTRFS_I(inode)->block_group = trans->block_group;
79}
80
81static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
82 struct inode *inode)
83{
84 BTRFS_I(inode)->last_trans = trans->transaction->transid;
85 BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid;
86}
87
88int btrfs_end_transaction(struct btrfs_trans_handle *trans,
89 struct btrfs_root *root);
90struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
91 int num_items);
92struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root,
93 int num_blocks);
94struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *r,
95 int num_blocks);
96int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
97 struct btrfs_root *root);
98int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
99 struct btrfs_root *root);
100
101int btrfs_add_dead_root(struct btrfs_root *root);
102int btrfs_drop_dead_root(struct btrfs_root *root);
103int btrfs_defrag_root(struct btrfs_root *root, int cacheonly);
104int btrfs_clean_old_snapshots(struct btrfs_root *root);
105int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
106 struct btrfs_root *root);
107int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
108 struct btrfs_root *root);
109int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
110 struct btrfs_root *root);
111void btrfs_throttle(struct btrfs_root *root);
112int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
113 struct btrfs_root *root);
114int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
115 struct extent_io_tree *dirty_pages, int mark);
116int btrfs_write_marked_extents(struct btrfs_root *root,
117 struct extent_io_tree *dirty_pages, int mark);
118int btrfs_wait_marked_extents(struct btrfs_root *root,
119 struct extent_io_tree *dirty_pages, int mark);
120int btrfs_transaction_blocked(struct btrfs_fs_info *info);
121int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
122#endif