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
41extern "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*/
51int 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*/
60int 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*/
71int 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*/
79int 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