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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 Masoneb84ae02008-07-17 13:53:27 -040029/*
30 * these are used to collect checksums done just before bios submission.
31 * They are attached via a list into the ordered extent, and
32 * checksum items are inserted into the tree after all the blocks in
33 * the ordered extent are on disk
34 */
Chris Masone6dcd2d2008-07-17 12:53:50 -040035struct btrfs_sector_sum {
Chris Masond20f7042008-12-08 16:58:54 -050036 /* bytenr on disk */
37 u64 bytenr;
Chris Masone6dcd2d2008-07-17 12:53:50 -040038 u32 sum;
39};
40
41struct btrfs_ordered_sum {
Chris Masond20f7042008-12-08 16:58:54 -050042 /* bytenr is the start of this extent on disk */
43 u64 bytenr;
44
Chris Mason3edf7d32008-07-18 06:17:13 -040045 /*
46 * this is the length in bytes covered by the sums array below.
Chris Mason3edf7d32008-07-18 06:17:13 -040047 */
48 unsigned long len;
Chris Masone6dcd2d2008-07-17 12:53:50 -040049 struct list_head list;
Chris Masoneb84ae02008-07-17 13:53:27 -040050 /* last field is a variable length array of btrfs_sector_sums */
Chris Masoned98b562008-07-22 23:06:42 -040051 struct btrfs_sector_sum sums[];
Chris Masone6dcd2d2008-07-17 12:53:50 -040052};
53
Chris Masoneb84ae02008-07-17 13:53:27 -040054/*
55 * bits for the flags field:
56 *
57 * BTRFS_ORDERED_IO_DONE is set when all of the blocks are written.
58 * It is used to make sure metadata is inserted into the tree only once
59 * per extent.
60 *
61 * BTRFS_ORDERED_COMPLETE is set when the extent is removed from the
62 * rbtree, just before waking any waiters. It is used to indicate the
63 * IO is done and any metadata is inserted into the tree.
64 */
Chris Masone6dcd2d2008-07-17 12:53:50 -040065#define BTRFS_ORDERED_IO_DONE 0 /* set when all the pages are written */
Chris Masoneb84ae02008-07-17 13:53:27 -040066
Chris Masone6dcd2d2008-07-17 12:53:50 -040067#define BTRFS_ORDERED_COMPLETE 1 /* set when removed from the tree */
Chris Masone6dcd2d2008-07-17 12:53:50 -040068
Yan Zheng7ea394f2008-08-05 13:05:02 -040069#define BTRFS_ORDERED_NOCOW 2 /* set when we want to write in place */
70
Li Zefan261507a02010-12-17 14:21:50 +080071#define BTRFS_ORDERED_COMPRESSED 3 /* writing a zlib compressed extent */
Chris Masonc8b97812008-10-29 14:49:59 -040072
Yan Zhengd899e052008-10-30 14:25:28 -040073#define BTRFS_ORDERED_PREALLOC 4 /* set when writing to prealloced extent */
74
Josef Bacik4b46fce2010-05-23 11:00:55 -040075#define BTRFS_ORDERED_DIRECT 5 /* set when we're doing DIO with this extent */
76
Josef Bacik5fd02042012-05-02 14:00:54 -040077#define BTRFS_ORDERED_IOERR 6 /* We had an io error when writing this out */
78
79#define BTRFS_ORDERED_UPDATED_ISIZE 7 /* indicates wether this ordered extent
80 * has done its due diligence in updating
81 * the isize. */
82
Chris Masone6dcd2d2008-07-17 12:53:50 -040083struct btrfs_ordered_extent {
Chris Masoneb84ae02008-07-17 13:53:27 -040084 /* logical offset in the file */
Chris Masone6dcd2d2008-07-17 12:53:50 -040085 u64 file_offset;
Chris Masoneb84ae02008-07-17 13:53:27 -040086
87 /* disk byte number */
Chris Masone6dcd2d2008-07-17 12:53:50 -040088 u64 start;
Chris Masoneb84ae02008-07-17 13:53:27 -040089
Chris Masonc8b97812008-10-29 14:49:59 -040090 /* ram length of the extent in bytes */
Chris Masone6dcd2d2008-07-17 12:53:50 -040091 u64 len;
Chris Masoneb84ae02008-07-17 13:53:27 -040092
Chris Masonc8b97812008-10-29 14:49:59 -040093 /* extent length on disk */
94 u64 disk_len;
95
Chris Mason8b62b722009-09-02 16:53:46 -040096 /* number of bytes that still need writing */
97 u64 bytes_left;
98
Miao Xieb9a8cc52012-09-06 04:01:21 -060099 /*
100 * the end of the ordered extent which is behind it but
101 * didn't update disk_i_size. Please see the comment of
102 * btrfs_ordered_update_i_size();
103 */
104 u64 outstanding_isize;
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
121 /* used to wait for the BTRFS_ORDERED_COMPLETE bit */
Chris Masone6dcd2d2008-07-17 12:53:50 -0400122 wait_queue_head_t wait;
Chris Masoneb84ae02008-07-17 13:53:27 -0400123
124 /* our friendly rbtree entry */
Chris Masone6dcd2d2008-07-17 12:53:50 -0400125 struct rb_node rb_node;
Chris Mason3eaa2882008-07-24 11:57:52 -0400126
127 /* a per root list of all the pending ordered extents */
128 struct list_head root_extent_list;
Josef Bacik5fd02042012-05-02 14:00:54 -0400129
130 struct btrfs_work work;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400131};
132
133
Chris Masoneb84ae02008-07-17 13:53:27 -0400134/*
135 * calculates the total size you need to allocate for an ordered sum
136 * structure spanning 'bytes' in the file
137 */
Chris Mason9ba46112008-07-23 09:26:26 -0400138static inline int btrfs_ordered_sum_size(struct btrfs_root *root,
139 unsigned long bytes)
Chris Masone6dcd2d2008-07-17 12:53:50 -0400140{
141 unsigned long num_sectors = (bytes + root->sectorsize - 1) /
142 root->sectorsize;
Chris Mason3edf7d32008-07-18 06:17:13 -0400143 num_sectors++;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400144 return sizeof(struct btrfs_ordered_sum) +
145 num_sectors * sizeof(struct btrfs_sector_sum);
146}
147
Chris Masondc17ff82008-01-08 15:46:30 -0500148static inline void
149btrfs_ordered_inode_tree_init(struct btrfs_ordered_inode_tree *t)
150{
Josef Bacik49958fd2010-02-02 21:48:28 +0000151 spin_lock_init(&t->lock);
Eric Paris6bef4d32010-02-23 19:43:04 +0000152 t->tree = RB_ROOT;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400153 t->last = NULL;
Chris Masondc17ff82008-01-08 15:46:30 -0500154}
155
Jeff Mahoney143bede2012-03-01 14:56:26 +0100156void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry);
157void btrfs_remove_ordered_extent(struct inode *inode,
Chris Masone6dcd2d2008-07-17 12:53:50 -0400158 struct btrfs_ordered_extent *entry);
159int btrfs_dec_test_ordered_pending(struct inode *inode,
Josef Bacik5a1a3df2010-02-02 20:51:14 +0000160 struct btrfs_ordered_extent **cached,
Josef Bacik5fd02042012-05-02 14:00:54 -0400161 u64 file_offset, u64 io_size, int uptodate);
Chris Mason163cf092010-11-28 19:56:33 -0500162int btrfs_dec_test_first_ordered_pending(struct inode *inode,
163 struct btrfs_ordered_extent **cached,
Josef Bacik5fd02042012-05-02 14:00:54 -0400164 u64 *file_offset, u64 io_size,
165 int uptodate);
Chris Masone6dcd2d2008-07-17 12:53:50 -0400166int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
Josef Bacik4b46fce2010-05-23 11:00:55 -0400167 u64 start, u64 len, u64 disk_len, int type);
168int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset,
169 u64 start, u64 len, u64 disk_len, int type);
Li Zefan261507a02010-12-17 14:21:50 +0800170int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset,
171 u64 start, u64 len, u64 disk_len,
172 int type, int compress_type);
Jeff Mahoney143bede2012-03-01 14:56:26 +0100173void btrfs_add_ordered_sum(struct inode *inode,
174 struct btrfs_ordered_extent *entry,
175 struct btrfs_ordered_sum *sum);
Chris Masone6dcd2d2008-07-17 12:53:50 -0400176struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct inode *inode,
177 u64 file_offset);
Chris Masoneb84ae02008-07-17 13:53:27 -0400178void btrfs_start_ordered_extent(struct inode *inode,
179 struct btrfs_ordered_extent *entry, int wait);
Jeff Mahoney143bede2012-03-01 14:56:26 +0100180void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len);
Chris Masone6dcd2d2008-07-17 12:53:50 -0400181struct btrfs_ordered_extent *
182btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset);
Josef Bacik4b46fce2010-05-23 11:00:55 -0400183struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode,
184 u64 file_offset,
185 u64 len);
Yan, Zhengc2167752009-11-12 09:34:21 +0000186int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
Chris Masondbe674a2008-07-17 12:54:05 -0400187 struct btrfs_ordered_extent *ordered);
Chris Masond20f7042008-12-08 16:58:54 -0500188int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, u32 *sum);
Jeff Mahoney143bede2012-03-01 14:56:26 +0100189void btrfs_run_ordered_operations(struct btrfs_root *root, int wait);
190void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
191 struct btrfs_root *root,
192 struct inode *inode);
Liu Bo6bbe3a92012-09-14 02:58:07 -0600193void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput);
Miao Xie6352b912012-09-06 04:01:51 -0600194int __init ordered_data_init(void);
195void ordered_data_exit(void);
Chris Masondc17ff82008-01-08 15:46:30 -0500196#endif