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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
Adam Buchbinder48fc7f72012-09-19 21:48:00 -040079#define BTRFS_ORDERED_UPDATED_ISIZE 7 /* indicates whether this ordered extent
Josef Bacik5fd02042012-05-02 14:00:54 -040080 * has done its due diligence in updating
81 * the isize. */
Josef Bacik2ab28f32012-10-12 15:27:49 -040082#define BTRFS_ORDERED_LOGGED_CSUM 8 /* We've logged the csums on this ordered
83 ordered extent */
Josef Bacik5fd02042012-05-02 14:00:54 -040084
Chris Masone6dcd2d2008-07-17 12:53:50 -040085struct btrfs_ordered_extent {
Chris Masoneb84ae02008-07-17 13:53:27 -040086 /* logical offset in the file */
Chris Masone6dcd2d2008-07-17 12:53:50 -040087 u64 file_offset;
Chris Masoneb84ae02008-07-17 13:53:27 -040088
89 /* disk byte number */
Chris Masone6dcd2d2008-07-17 12:53:50 -040090 u64 start;
Chris Masoneb84ae02008-07-17 13:53:27 -040091
Chris Masonc8b97812008-10-29 14:49:59 -040092 /* ram length of the extent in bytes */
Chris Masone6dcd2d2008-07-17 12:53:50 -040093 u64 len;
Chris Masoneb84ae02008-07-17 13:53:27 -040094
Chris Masonc8b97812008-10-29 14:49:59 -040095 /* extent length on disk */
96 u64 disk_len;
97
Chris Mason8b62b722009-09-02 16:53:46 -040098 /* number of bytes that still need writing */
99 u64 bytes_left;
100
Josef Bacik2ab28f32012-10-12 15:27:49 -0400101 /* number of bytes that still need csumming */
102 u64 csum_bytes_left;
103
Miao Xieb9a8cc52012-09-06 04:01:21 -0600104 /*
105 * the end of the ordered extent which is behind it but
106 * didn't update disk_i_size. Please see the comment of
107 * btrfs_ordered_update_i_size();
108 */
109 u64 outstanding_isize;
110
Chris Masoneb84ae02008-07-17 13:53:27 -0400111 /* flags (described above) */
Chris Masone6dcd2d2008-07-17 12:53:50 -0400112 unsigned long flags;
Chris Masoneb84ae02008-07-17 13:53:27 -0400113
Li Zefan261507a02010-12-17 14:21:50 +0800114 /* compression algorithm */
115 int compress_type;
116
Chris Masoneb84ae02008-07-17 13:53:27 -0400117 /* reference count */
Chris Masone6dcd2d2008-07-17 12:53:50 -0400118 atomic_t refs;
Chris Masoneb84ae02008-07-17 13:53:27 -0400119
Chris Mason3eaa2882008-07-24 11:57:52 -0400120 /* the inode we belong to */
121 struct inode *inode;
122
Chris Masoneb84ae02008-07-17 13:53:27 -0400123 /* list of checksums for insertion when the extent io is done */
Chris Masone6dcd2d2008-07-17 12:53:50 -0400124 struct list_head list;
Chris Masoneb84ae02008-07-17 13:53:27 -0400125
Josef Bacik2ab28f32012-10-12 15:27:49 -0400126 /* If we need to wait on this to be done */
127 struct list_head log_list;
128
Chris Masoneb84ae02008-07-17 13:53:27 -0400129 /* used to wait for the BTRFS_ORDERED_COMPLETE bit */
Chris Masone6dcd2d2008-07-17 12:53:50 -0400130 wait_queue_head_t wait;
Chris Masoneb84ae02008-07-17 13:53:27 -0400131
132 /* our friendly rbtree entry */
Chris Masone6dcd2d2008-07-17 12:53:50 -0400133 struct rb_node rb_node;
Chris Mason3eaa2882008-07-24 11:57:52 -0400134
135 /* a per root list of all the pending ordered extents */
136 struct list_head root_extent_list;
Josef Bacik5fd02042012-05-02 14:00:54 -0400137
138 struct btrfs_work work;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400139
Miao Xie9afab882012-10-25 09:41:36 +0000140 struct completion completion;
141 struct btrfs_work flush_work;
142 struct list_head work_list;
143};
Chris Masone6dcd2d2008-07-17 12:53:50 -0400144
Chris Masoneb84ae02008-07-17 13:53:27 -0400145/*
146 * calculates the total size you need to allocate for an ordered sum
147 * structure spanning 'bytes' in the file
148 */
Chris Mason9ba46112008-07-23 09:26:26 -0400149static inline int btrfs_ordered_sum_size(struct btrfs_root *root,
150 unsigned long bytes)
Chris Masone6dcd2d2008-07-17 12:53:50 -0400151{
152 unsigned long num_sectors = (bytes + root->sectorsize - 1) /
153 root->sectorsize;
Chris Mason3edf7d32008-07-18 06:17:13 -0400154 num_sectors++;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400155 return sizeof(struct btrfs_ordered_sum) +
156 num_sectors * sizeof(struct btrfs_sector_sum);
157}
158
Chris Masondc17ff82008-01-08 15:46:30 -0500159static inline void
160btrfs_ordered_inode_tree_init(struct btrfs_ordered_inode_tree *t)
161{
Josef Bacik49958fd2010-02-02 21:48:28 +0000162 spin_lock_init(&t->lock);
Eric Paris6bef4d32010-02-23 19:43:04 +0000163 t->tree = RB_ROOT;
Chris Masone6dcd2d2008-07-17 12:53:50 -0400164 t->last = NULL;
Chris Masondc17ff82008-01-08 15:46:30 -0500165}
166
Jeff Mahoney143bede2012-03-01 14:56:26 +0100167void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry);
168void btrfs_remove_ordered_extent(struct inode *inode,
Chris Masone6dcd2d2008-07-17 12:53:50 -0400169 struct btrfs_ordered_extent *entry);
170int btrfs_dec_test_ordered_pending(struct inode *inode,
Josef Bacik5a1a3df2010-02-02 20:51:14 +0000171 struct btrfs_ordered_extent **cached,
Josef Bacik5fd02042012-05-02 14:00:54 -0400172 u64 file_offset, u64 io_size, int uptodate);
Chris Mason163cf092010-11-28 19:56:33 -0500173int btrfs_dec_test_first_ordered_pending(struct inode *inode,
174 struct btrfs_ordered_extent **cached,
Josef Bacik5fd02042012-05-02 14:00:54 -0400175 u64 *file_offset, u64 io_size,
176 int uptodate);
Chris Masone6dcd2d2008-07-17 12:53:50 -0400177int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
Josef Bacik4b46fce2010-05-23 11:00:55 -0400178 u64 start, u64 len, u64 disk_len, int type);
179int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset,
180 u64 start, u64 len, u64 disk_len, int type);
Li Zefan261507a02010-12-17 14:21:50 +0800181int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset,
182 u64 start, u64 len, u64 disk_len,
183 int type, int compress_type);
Jeff Mahoney143bede2012-03-01 14:56:26 +0100184void btrfs_add_ordered_sum(struct inode *inode,
185 struct btrfs_ordered_extent *entry,
186 struct btrfs_ordered_sum *sum);
Chris Masone6dcd2d2008-07-17 12:53:50 -0400187struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct inode *inode,
188 u64 file_offset);
Chris Masoneb84ae02008-07-17 13:53:27 -0400189void btrfs_start_ordered_extent(struct inode *inode,
190 struct btrfs_ordered_extent *entry, int wait);
Jeff Mahoney143bede2012-03-01 14:56:26 +0100191void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len);
Chris Masone6dcd2d2008-07-17 12:53:50 -0400192struct btrfs_ordered_extent *
193btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset);
Josef Bacik4b46fce2010-05-23 11:00:55 -0400194struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode,
195 u64 file_offset,
196 u64 len);
Yan, Zhengc2167752009-11-12 09:34:21 +0000197int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
Chris Masondbe674a2008-07-17 12:54:05 -0400198 struct btrfs_ordered_extent *ordered);
Miao Xiee4100d92013-04-05 07:20:56 +0000199int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr,
200 u32 *sum, int len);
Josef Bacik569e0f32013-02-13 11:09:14 -0500201int btrfs_run_ordered_operations(struct btrfs_trans_handle *trans,
202 struct btrfs_root *root, int wait);
Jeff Mahoney143bede2012-03-01 14:56:26 +0100203void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
204 struct btrfs_root *root,
205 struct inode *inode);
Liu Bo6bbe3a92012-09-14 02:58:07 -0600206void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput);
Josef Bacik2ab28f32012-10-12 15:27:49 -0400207void btrfs_get_logged_extents(struct btrfs_root *log, struct inode *inode);
208void btrfs_wait_logged_extents(struct btrfs_root *log, u64 transid);
209void btrfs_free_logged_extents(struct btrfs_root *log, u64 transid);
Miao Xie6352b912012-09-06 04:01:51 -0600210int __init ordered_data_init(void);
211void ordered_data_exit(void);
Chris Masondc17ff82008-01-08 15:46:30 -0500212#endif