1 | /* |
2 | * Copyright (c) 2015 Grzegorz Kostka (kostka.grzegorz@gmail.com) |
3 | * Copyright (c) 2015 Kaho Ng (ngkaho1234@gmail.com) |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | /** @addtogroup lwext4 |
30 | * @{ |
31 | */ |
32 | /** |
33 | * @file ext4_trans.h |
34 | * @brief Transaction handle functions |
35 | */ |
36 | |
37 | #ifndef EXT4_TRANS_H |
38 | #define EXT4_TRANS_H |
39 | |
40 | #ifdef __cplusplus |
41 | extern "C" { |
42 | #endif |
43 | |
44 | #include <ext4_config.h> |
45 | #include <ext4_types.h> |
46 | |
47 | |
48 | /**@brief Mark a buffer dirty and add it to the current transaction. |
49 | * @param buf buffer |
50 | * @return standard error code*/ |
51 | int ext4_trans_set_block_dirty(struct ext4_buf *buf); |
52 | |
53 | /**@brief Block get function (through cache, don't read). |
54 | * jbd_trans_get_access would be called in order to |
55 | * get write access to the buffer. |
56 | * @param bdev block device descriptor |
57 | * @param b block descriptor |
58 | * @param lba logical block address |
59 | * @return standard error code*/ |
60 | int ext4_trans_block_get_noread(struct ext4_blockdev *bdev, |
61 | struct ext4_block *b, |
62 | uint64_t lba); |
63 | |
64 | /**@brief Block get function (through cache). |
65 | * jbd_trans_get_access would be called in order to |
66 | * get write access to the buffer. |
67 | * @param bdev block device descriptor |
68 | * @param b block descriptor |
69 | * @param lba logical block address |
70 | * @return standard error code*/ |
71 | int ext4_trans_block_get(struct ext4_blockdev *bdev, |
72 | struct ext4_block *b, |
73 | uint64_t lba); |
74 | |
75 | /**@brief Try to add block to be revoked to the current transaction. |
76 | * @param bdev block device descriptor |
77 | * @param lba logical block address |
78 | * @return standard error code*/ |
79 | int ext4_trans_try_revoke_block(struct ext4_blockdev *bdev, |
80 | uint64_t lba); |
81 | |
82 | #ifdef __cplusplus |
83 | } |
84 | #endif |
85 | |
86 | #endif /* EXT4_TRANS_H */ |
87 | |
88 | /** |
89 | * @} |
90 | */ |
91 | |