tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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 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
49struct 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
62struct 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
74static 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
81int btrfs_end_transaction(struct btrfs_trans_handle *trans,
82 struct btrfs_root *root);
83int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans,
84 struct btrfs_root *root);
85struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
86 int num_items);
87struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root);
88struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root);
89struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root);
90int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid);
91int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
92 struct btrfs_root *root);
93
94int btrfs_add_dead_root(struct btrfs_root *root);
95int btrfs_defrag_root(struct btrfs_root *root, int cacheonly);
96int btrfs_clean_old_snapshots(struct btrfs_root *root);
97int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
98 struct btrfs_root *root);
99int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
100 struct btrfs_root *root,
101 int wait_for_unblock);
102int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
103 struct btrfs_root *root);
104int btrfs_end_transaction_dmeta(struct btrfs_trans_handle *trans,
105 struct btrfs_root *root);
106int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
107 struct btrfs_root *root);
108void btrfs_throttle(struct btrfs_root *root);
109int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
110 struct btrfs_root *root);
111int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
112 struct extent_io_tree *dirty_pages, int mark);
113int btrfs_write_marked_extents(struct btrfs_root *root,
114 struct extent_io_tree *dirty_pages, int mark);
115int btrfs_wait_marked_extents(struct btrfs_root *root,
116 struct extent_io_tree *dirty_pages, int mark);
117int btrfs_transaction_blocked(struct btrfs_fs_info *info);
118int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
119void put_transaction(struct btrfs_transaction *transaction);
120#endif