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dc17ff8f CM |
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_ORDERED_DATA__ | |
20 | #define __BTRFS_ORDERED_DATA__ | |
21 | ||
eb84ae03 | 22 | /* one of these per inode */ |
dc17ff8f | 23 | struct btrfs_ordered_inode_tree { |
49958fd7 | 24 | spinlock_t lock; |
dc17ff8f | 25 | struct rb_root tree; |
e6dcd2dc | 26 | struct rb_node *last; |
dc17ff8f CM |
27 | }; |
28 | ||
e6dcd2dc | 29 | struct btrfs_ordered_sum { |
d20f7043 CM |
30 | /* bytenr is the start of this extent on disk */ |
31 | u64 bytenr; | |
32 | ||
3edf7d33 CM |
33 | /* |
34 | * this is the length in bytes covered by the sums array below. | |
3edf7d33 | 35 | */ |
f51a4a18 | 36 | int len; |
e6dcd2dc | 37 | struct list_head list; |
f51a4a18 MX |
38 | /* last field is a variable length array of csums */ |
39 | u32 sums[]; | |
e6dcd2dc CM |
40 | }; |
41 | ||
eb84ae03 CM |
42 | /* |
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 | */ | |
e6dcd2dc | 53 | #define BTRFS_ORDERED_IO_DONE 0 /* set when all the pages are written */ |
eb84ae03 | 54 | |
e6dcd2dc | 55 | #define BTRFS_ORDERED_COMPLETE 1 /* set when removed from the tree */ |
e6dcd2dc | 56 | |
7ea394f1 YZ |
57 | #define BTRFS_ORDERED_NOCOW 2 /* set when we want to write in place */ |
58 | ||
261507a0 | 59 | #define BTRFS_ORDERED_COMPRESSED 3 /* writing a zlib compressed extent */ |
c8b97818 | 60 | |
01327610 | 61 | #define BTRFS_ORDERED_PREALLOC 4 /* set when writing to preallocated extent */ |
d899e052 | 62 | |
4b46fce2 JB |
63 | #define BTRFS_ORDERED_DIRECT 5 /* set when we're doing DIO with this extent */ |
64 | ||
5fd02043 JB |
65 | #define BTRFS_ORDERED_IOERR 6 /* We had an io error when writing this out */ |
66 | ||
48fc7f7e | 67 | #define BTRFS_ORDERED_UPDATED_ISIZE 7 /* indicates whether this ordered extent |
5fd02043 JB |
68 | * has done its due diligence in updating |
69 | * the isize. */ | |
2ab28f32 JB |
70 | #define BTRFS_ORDERED_LOGGED_CSUM 8 /* We've logged the csums on this ordered |
71 | ordered extent */ | |
77cef2ec | 72 | #define BTRFS_ORDERED_TRUNCATED 9 /* Set when we have to truncate an extent */ |
5fd02043 | 73 | |
50d9aa99 JB |
74 | #define BTRFS_ORDERED_LOGGED 10 /* Set when we've waited on this ordered extent |
75 | * in the logging code. */ | |
161c3549 JB |
76 | #define BTRFS_ORDERED_PENDING 11 /* We are waiting for this ordered extent to |
77 | * complete in the current transaction. */ | |
1af4a0aa LB |
78 | #define BTRFS_ORDERED_REGULAR 12 /* Regular IO for COW */ |
79 | ||
e6dcd2dc | 80 | struct btrfs_ordered_extent { |
eb84ae03 | 81 | /* logical offset in the file */ |
e6dcd2dc | 82 | u64 file_offset; |
eb84ae03 CM |
83 | |
84 | /* disk byte number */ | |
e6dcd2dc | 85 | u64 start; |
eb84ae03 | 86 | |
c8b97818 | 87 | /* ram length of the extent in bytes */ |
e6dcd2dc | 88 | u64 len; |
eb84ae03 | 89 | |
c8b97818 CM |
90 | /* extent length on disk */ |
91 | u64 disk_len; | |
92 | ||
8b62b72b CM |
93 | /* number of bytes that still need writing */ |
94 | u64 bytes_left; | |
95 | ||
b9a8cc5b MX |
96 | /* |
97 | * the end of the ordered extent which is behind it but | |
98 | * didn't update disk_i_size. Please see the comment of | |
99 | * btrfs_ordered_update_i_size(); | |
100 | */ | |
101 | u64 outstanding_isize; | |
102 | ||
77cef2ec JB |
103 | /* |
104 | * If we get truncated we need to adjust the file extent we enter for | |
105 | * this ordered extent so that we do not expose stale data. | |
106 | */ | |
107 | u64 truncated_len; | |
108 | ||
eb84ae03 | 109 | /* flags (described above) */ |
e6dcd2dc | 110 | unsigned long flags; |
eb84ae03 | 111 | |
261507a0 LZ |
112 | /* compression algorithm */ |
113 | int compress_type; | |
114 | ||
eb84ae03 | 115 | /* reference count */ |
e76edab7 | 116 | refcount_t refs; |
eb84ae03 | 117 | |
3eaa2885 CM |
118 | /* the inode we belong to */ |
119 | struct inode *inode; | |
120 | ||
eb84ae03 | 121 | /* list of checksums for insertion when the extent io is done */ |
e6dcd2dc | 122 | struct list_head list; |
eb84ae03 | 123 | |
2ab28f32 JB |
124 | /* If we need to wait on this to be done */ |
125 | struct list_head log_list; | |
126 | ||
50d9aa99 JB |
127 | /* If the transaction needs to wait on this ordered extent */ |
128 | struct list_head trans_list; | |
129 | ||
eb84ae03 | 130 | /* used to wait for the BTRFS_ORDERED_COMPLETE bit */ |
e6dcd2dc | 131 | wait_queue_head_t wait; |
eb84ae03 CM |
132 | |
133 | /* our friendly rbtree entry */ | |
e6dcd2dc | 134 | struct rb_node rb_node; |
3eaa2885 CM |
135 | |
136 | /* a per root list of all the pending ordered extents */ | |
137 | struct list_head root_extent_list; | |
5fd02043 | 138 | |
d458b054 | 139 | struct btrfs_work work; |
e6dcd2dc | 140 | |
9afab882 | 141 | struct completion completion; |
d458b054 | 142 | struct btrfs_work flush_work; |
9afab882 MX |
143 | struct list_head work_list; |
144 | }; | |
e6dcd2dc | 145 | |
eb84ae03 CM |
146 | /* |
147 | * calculates the total size you need to allocate for an ordered sum | |
148 | * structure spanning 'bytes' in the file | |
149 | */ | |
da17066c | 150 | static inline int btrfs_ordered_sum_size(struct btrfs_fs_info *fs_info, |
9ba4611a | 151 | unsigned long bytes) |
e6dcd2dc | 152 | { |
da17066c | 153 | int num_sectors = (int)DIV_ROUND_UP(bytes, fs_info->sectorsize); |
f51a4a18 | 154 | return sizeof(struct btrfs_ordered_sum) + num_sectors * sizeof(u32); |
e6dcd2dc CM |
155 | } |
156 | ||
dc17ff8f CM |
157 | static inline void |
158 | btrfs_ordered_inode_tree_init(struct btrfs_ordered_inode_tree *t) | |
159 | { | |
49958fd7 | 160 | spin_lock_init(&t->lock); |
6bef4d31 | 161 | t->tree = RB_ROOT; |
e6dcd2dc | 162 | t->last = NULL; |
dc17ff8f CM |
163 | } |
164 | ||
143bede5 JM |
165 | void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry); |
166 | void btrfs_remove_ordered_extent(struct inode *inode, | |
e6dcd2dc CM |
167 | struct btrfs_ordered_extent *entry); |
168 | int btrfs_dec_test_ordered_pending(struct inode *inode, | |
5a1a3df1 | 169 | struct btrfs_ordered_extent **cached, |
5fd02043 | 170 | u64 file_offset, u64 io_size, int uptodate); |
163cf09c CM |
171 | int btrfs_dec_test_first_ordered_pending(struct inode *inode, |
172 | struct btrfs_ordered_extent **cached, | |
5fd02043 JB |
173 | u64 *file_offset, u64 io_size, |
174 | int uptodate); | |
e6dcd2dc | 175 | int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, |
4b46fce2 JB |
176 | u64 start, u64 len, u64 disk_len, int type); |
177 | int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset, | |
178 | u64 start, u64 len, u64 disk_len, int type); | |
261507a0 LZ |
179 | int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset, |
180 | u64 start, u64 len, u64 disk_len, | |
181 | int type, int compress_type); | |
143bede5 JM |
182 | void btrfs_add_ordered_sum(struct inode *inode, |
183 | struct btrfs_ordered_extent *entry, | |
184 | struct btrfs_ordered_sum *sum); | |
e6dcd2dc CM |
185 | struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct inode *inode, |
186 | u64 file_offset); | |
eb84ae03 CM |
187 | void btrfs_start_ordered_extent(struct inode *inode, |
188 | struct btrfs_ordered_extent *entry, int wait); | |
0ef8b726 | 189 | int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len); |
e6dcd2dc CM |
190 | struct btrfs_ordered_extent * |
191 | btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset); | |
a776c6fa NB |
192 | struct btrfs_ordered_extent *btrfs_lookup_ordered_range( |
193 | struct btrfs_inode *inode, | |
194 | u64 file_offset, | |
195 | u64 len); | |
b659ef02 FM |
196 | bool btrfs_have_ordered_extents_in_range(struct inode *inode, |
197 | u64 file_offset, | |
198 | u64 len); | |
c2167754 | 199 | int btrfs_ordered_update_i_size(struct inode *inode, u64 offset, |
dbe674a9 | 200 | struct btrfs_ordered_extent *ordered); |
e4100d98 MX |
201 | int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, |
202 | u32 *sum, int len); | |
6374e57a | 203 | u64 btrfs_wait_ordered_extents(struct btrfs_root *root, u64 nr, |
578def7c | 204 | const u64 range_start, const u64 range_len); |
6374e57a | 205 | u64 btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, u64 nr, |
578def7c | 206 | const u64 range_start, const u64 range_len); |
22346637 | 207 | void btrfs_get_logged_extents(struct btrfs_inode *inode, |
0870295b FM |
208 | struct list_head *logged_list, |
209 | const loff_t start, | |
210 | const loff_t end); | |
827463c4 MX |
211 | void btrfs_put_logged_extents(struct list_head *logged_list); |
212 | void btrfs_submit_logged_extents(struct list_head *logged_list, | |
213 | struct btrfs_root *log); | |
50d9aa99 JB |
214 | void btrfs_wait_logged_extents(struct btrfs_trans_handle *trans, |
215 | struct btrfs_root *log, u64 transid); | |
2ab28f32 | 216 | void btrfs_free_logged_extents(struct btrfs_root *log, u64 transid); |
6352b91d MX |
217 | int __init ordered_data_init(void); |
218 | void ordered_data_exit(void); | |
dc17ff8f | 219 | #endif |