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Chris Masondc17ff82008-01-08 15:46:30 -05001/*
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_ORDERED_DATA__
20#define __BTRFS_ORDERED_DATA__
21
Chris Masoneb84ae02008-07-17 13:53:27 -040022/* one of these per inode */
Chris Masondc17ff82008-01-08 15:46:30 -050023struct btrfs_ordered_inode_tree {
Josef Bacik49958fd2010-02-02 21:48:28 +000024 spinlock_t lock;
Chris Masondc17ff82008-01-08 15:46:30 -050025 struct rb_root tree;
Chris Masone6dcd2d2008-07-17 12:53:50 -040026 struct rb_node *last;
Chris Masondc17ff82008-01-08 15:46:30 -050027};
28
Chris Masone6dcd2d2008-07-17 12:53:50 -040029struct btrfs_ordered_sum {
Chris Masond20f7042008-12-08 16:58:54 -050030 /* bytenr is the start of this extent on disk */
31 u64 bytenr;
32
Chris Mason3edf7d32008-07-18 06:17:13 -040033 /*
34 * this is the length in bytes covered by the sums array below.
Chris Mason3edf7d32008-07-18 06:17:13 -040035 */
Miao Xief51a4a12013-06-19 10:36:09 +080036 int len;
Chris Masone6dcd2d2008-07-17 12:53:50 -040037 struct list_head list;
Miao Xief51a4a12013-06-19 10:36:09 +080038 /* last field is a variable length array of csums */
39 u32 sums[];
Chris Masone6dcd2d2008-07-17 12:53:50 -040040};
41
Chris Masoneb84ae02008-07-17 13:53:27 -040042/*
43 * bits for the flags field:
44 *
45 * BTRFS_ORDERED_IO_DONE is set when all of the blocks are written.
46 * It is used to make sure metadata is inserted into the tree only once
47 * per extent.
48 *
49 * BTRFS_ORDERED_COMPLETE is set when the extent is removed from the
50 * rbtree, just before waking any waiters. It is used to indicate the
51 * IO is done and any metadata is inserted into the tree.
52 */
Chris Masone6dcd2d2008-07-17 12:53:50 -040053#define BTRFS_ORDERED_IO_DONE 0 /* set when all the pages are written */
Chris Masoneb84ae02008-07-17 13:53:27 -040054
Chris Masone6dcd2d2008-07-17 12:53:50 -040055#define BTRFS_ORDERED_COMPLETE 1 /* set when removed from the tree */
Chris Masone6dcd2d2008-07-17 12:53:50 -040056
Yan Zheng7ea394f2008-08-05 13:05:02 -040057#define BTRFS_ORDERED_NOCOW 2 /* set when we want to write in place */
58
Li Zefan261507a02010-12-17 14:21:50 +080059#define BTRFS_ORDERED_COMPRESSED 3 /* writing a zlib compressed extent */
Chris Masonc8b97812008-10-29 14:49:59 -040060
Yan Zhengd899e052008-10-30 14:25:28 -040061#define BTRFS_ORDERED_PREALLOC 4 /* set when writing to prealloced extent */
62
Josef Bacik4b46fce2010-05-23 11:00:55 -040063#define BTRFS_ORDERED_DIRECT 5 /* set when we're doing DIO with this extent */
64
Josef Bacik5fd02042012-05-02 14:00:54 -040065#define BTRFS_ORDERED_IOERR 6 /* We had an io error when writing this out */
66
Adam Buchbinder48fc7f72012-09-19 21:48:00 -040067#define BTRFS_ORDERED_UPDATED_ISIZE 7 /* indicates whether this ordered extent
Josef Bacik5fd02042012-05-02 14:00:54 -040068 * has done its due diligence in updating
69 * the isize. */
Josef Bacik2ab28f32012-10-12 15:27:49 -040070#define BTRFS_ORDERED_LOGGED_CSUM 8 /* We've logged the csums on this ordered
71 ordered extent */
Josef Bacik77cef2e2013-08-29 13:57:21 -040072#define BTRFS_ORDERED_TRUNCATED 9 /* Set when we have to truncate an extent */
Josef Bacik5fd02042012-05-02 14:00:54 -040073
Chris Masone6dcd2d2008-07-17 12:53:50 -040074struct btrfs_ordered_extent {
Chris Masoneb84ae02008-07-17 13:53:27 -040075 /* logical offset in the file */
Chris Masone6dcd2d2008-07-17 12:53:50 -040076 u64 file_offset;
Chris Masoneb84ae02008-07-17 13:53:27 -040077
78 /* disk byte number */
Chris Masone6dcd2d2008-07-17 12:53:50 -040079 u64 start;
Chris Masoneb84ae02008-07-17 13:53:27 -040080
Chris Masonc8b97812008-10-29 14:49:59 -040081 /* ram length of the extent in bytes */
Chris Masone6dcd2d2008-07-17 12:53:50 -040082 u64 len;
Chris Masoneb84ae02008-07-17 13:53:27 -040083
Chris Masonc8b97812008-10-29 14:49:59 -040084 /* extent length on disk */
85 u64 disk_len;
86
Chris Mason8b62b722009-09-02 16:53:46 -040087 /* number of bytes that still need writing */
88 u64 bytes_left;
89
Josef Bacik2ab28f32012-10-12 15:27:49 -040090 /* number of bytes that still need csumming */
91 u64 csum_bytes_left;
92
Miao Xieb9a8cc52012-09-06 04:01:21 -060093 /*
94 * the end of the ordered extent which is behind it but
95 * didn't update disk_i_size. Please see the comment of
96 * btrfs_ordered_update_i_size();
97 */
98 u64 outstanding_isize;
99
Josef Bacik77cef2e2013-08-29 13:57:21 -0400100 /*
101 * If we get truncated we need to adjust the file extent we enter for
102 * this ordered extent so that we do not expose stale data.
103 */
104 u64 truncated_len;
105
Chris Masoneb84ae02008-07-17 13:53:27 -0400106 /* flags (described above) */
Chris Masone6dcd2d2008-07-17 12:53:50 -0400107 unsigned long flags;
Chris Masoneb84ae02008-07-17 13:53:27 -0400108
Li Zefan261507a02010-12-17 14:21:50 +0800109 /* compression algorithm */
110 int compress_type;
111
Chris Masoneb84ae02008-07-17 13:53:27 -0400112 /* reference count */
Chris Masone6dcd2d2008-07-17 12:53:50 -0400113 atomic_t refs;
Chris Masoneb84ae02008-07-17 13:53:27 -0400114
Chris Mason3eaa2882008-07-24 11:57:52 -0400115 /* the inode we belong to */
116 struct inode *inode;
117
Chris Masoneb84ae02008-07-17 13:53:27 -0400118 /* list of checksums for insertion when the extent io is done */
Chris Masone6dcd2d2008-07-17 12:53:50 -0400119 struct list_head list;
Chris Masoneb84ae02008-07-17 13:53:27 -0400120
Josef Bacik2ab28f32012-10-12 15:27:49 -0400121 /* If we need to wait on this to be done */
122 struct list_head log_list;
123
Chris Masoneb84ae02008-07-17 13:53:27 -0400124 /* used to wait for the BTRFS_ORDERED_COMPLETE bit */
Chris Masone6dcd2d2008-07-17 12:53:50 -0400125 wait_queue_head_t wait;
Chris Masoneb84ae02008-07-17 13:53:27 -0400126
127 /* our friendly rbtree entry */
Chris Masone6dcd2d2008-07-17 12:53:50 -0400128 struct rb_node rb_node;
Chris Mason3eaa2882008-07-24 11:57:52 -0400129
130 /* a per root list of all the pending ordered extents */
131 struct list_head root_extent_list;
Josef Bacik5fd02042012-05-02 14:00:54 -0400132
133 struct btrfs_work work;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400134
Miao Xie9afab882012-10-25 09:41:36 +0000135 struct completion completion;
136 struct btrfs_work flush_work;
137 struct list_head work_list;
138};
Chris Masone6dcd2d2008-07-17 12:53:50 -0400139
Chris Masoneb84ae02008-07-17 13:53:27 -0400140/*
141 * calculates the total size you need to allocate for an ordered sum
142 * structure spanning 'bytes' in the file
143 */
Chris Mason9ba46112008-07-23 09:26:26 -0400144static inline int btrfs_ordered_sum_size(struct btrfs_root *root,
145 unsigned long bytes)
Chris Masone6dcd2d2008-07-17 12:53:50 -0400146{
Miao Xief51a4a12013-06-19 10:36:09 +0800147 int num_sectors = (int)DIV_ROUND_UP(bytes, root->sectorsize);
148 return sizeof(struct btrfs_ordered_sum) + num_sectors * sizeof(u32);
Chris Masone6dcd2d2008-07-17 12:53:50 -0400149}
150
Chris Masondc17ff82008-01-08 15:46:30 -0500151static inline void
152btrfs_ordered_inode_tree_init(struct btrfs_ordered_inode_tree *t)
153{
Josef Bacik49958fd2010-02-02 21:48:28 +0000154 spin_lock_init(&t->lock);
Eric Paris6bef4d32010-02-23 19:43:04 +0000155 t->tree = RB_ROOT;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400156 t->last = NULL;
Chris Masondc17ff82008-01-08 15:46:30 -0500157}
158
Jeff Mahoney143bede2012-03-01 14:56:26 +0100159void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry);
160void btrfs_remove_ordered_extent(struct inode *inode,
Chris Masone6dcd2d2008-07-17 12:53:50 -0400161 struct btrfs_ordered_extent *entry);
162int btrfs_dec_test_ordered_pending(struct inode *inode,
Josef Bacik5a1a3df2010-02-02 20:51:14 +0000163 struct btrfs_ordered_extent **cached,
Josef Bacik5fd02042012-05-02 14:00:54 -0400164 u64 file_offset, u64 io_size, int uptodate);
Chris Mason163cf092010-11-28 19:56:33 -0500165int btrfs_dec_test_first_ordered_pending(struct inode *inode,
166 struct btrfs_ordered_extent **cached,
Josef Bacik5fd02042012-05-02 14:00:54 -0400167 u64 *file_offset, u64 io_size,
168 int uptodate);
Chris Masone6dcd2d2008-07-17 12:53:50 -0400169int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
Josef Bacik4b46fce2010-05-23 11:00:55 -0400170 u64 start, u64 len, u64 disk_len, int type);
171int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset,
172 u64 start, u64 len, u64 disk_len, int type);
Li Zefan261507a02010-12-17 14:21:50 +0800173int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset,
174 u64 start, u64 len, u64 disk_len,
175 int type, int compress_type);
Jeff Mahoney143bede2012-03-01 14:56:26 +0100176void btrfs_add_ordered_sum(struct inode *inode,
177 struct btrfs_ordered_extent *entry,
178 struct btrfs_ordered_sum *sum);
Chris Masone6dcd2d2008-07-17 12:53:50 -0400179struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct inode *inode,
180 u64 file_offset);
Chris Masoneb84ae02008-07-17 13:53:27 -0400181void btrfs_start_ordered_extent(struct inode *inode,
182 struct btrfs_ordered_extent *entry, int wait);
Josef Bacik0ef8b722013-10-25 16:13:35 -0400183int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len);
Chris Masone6dcd2d2008-07-17 12:53:50 -0400184struct btrfs_ordered_extent *
185btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset);
Josef Bacik4b46fce2010-05-23 11:00:55 -0400186struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode,
187 u64 file_offset,
188 u64 len);
Yan, Zhengc2167752009-11-12 09:34:21 +0000189int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
Chris Masondbe674a2008-07-17 12:54:05 -0400190 struct btrfs_ordered_extent *ordered);
Miao Xiee4100d92013-04-05 07:20:56 +0000191int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr,
192 u32 *sum, int len);
Josef Bacik569e0f32013-02-13 11:09:14 -0500193int btrfs_run_ordered_operations(struct btrfs_trans_handle *trans,
194 struct btrfs_root *root, int wait);
Jeff Mahoney143bede2012-03-01 14:56:26 +0100195void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
196 struct btrfs_root *root,
197 struct inode *inode);
Miao Xieb0244192013-11-04 23:13:25 +0800198int btrfs_wait_ordered_extents(struct btrfs_root *root, int nr);
199void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, int nr);
Josef Bacik2ab28f32012-10-12 15:27:49 -0400200void btrfs_get_logged_extents(struct btrfs_root *log, struct inode *inode);
201void btrfs_wait_logged_extents(struct btrfs_root *log, u64 transid);
202void btrfs_free_logged_extents(struct btrfs_root *log, u64 transid);
Miao Xie6352b912012-09-06 04:01:51 -0600203int __init ordered_data_init(void);
204void ordered_data_exit(void);
Chris Masondc17ff82008-01-08 15:46:30 -0500205#endif