ref: ab4ac2567203f642959e0ff8a88425254d121a52
dir: /src/ext4_trans.c/
/*
* Copyright (c) 2015 Grzegorz Kostka (kostka.grzegorz@gmail.com)
* Copyright (c) 2015 Kaho Ng (ngkaho1234@gmail.com)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup lwext4
* @{
*/
/**
* @file ext4_trans.c
* @brief Ext4 transaction buffer operations.
*/
#include "ext4_config.h"
#include "ext4_types.h"
#include "ext4_misc.h"
#include "ext4_errno.h"
#include "ext4_debug.h"
#include "ext4_fs.h"
#include "ext4_journal.h"
static int ext4_trans_get_write_access(struct ext4_fs *fs __unused,
struct ext4_block *block __unused)
{
int r = EOK;
#if CONFIG_JOURNALING_ENABLE
if (fs->jbd_journal && fs->curr_trans) {
struct jbd_journal *journal = fs->jbd_journal;
struct jbd_trans *trans = fs->curr_trans;
r = jbd_trans_get_access(journal, trans, block);
}
#endif
return r;
}
int ext4_trans_set_block_dirty(struct ext4_buf *buf)
{
int r = EOK;
#if CONFIG_JOURNALING_ENABLE
struct ext4_fs *fs = buf->bc->bdev->fs;
struct ext4_block block = {
.lb_id = buf->lba,
.data = buf->data,
.buf = buf
};
if (fs->jbd_journal && fs->curr_trans) {
struct jbd_trans *trans = fs->curr_trans;
return jbd_trans_set_block_dirty(trans, &block);
}
#endif
ext4_bcache_set_dirty(buf);
return r;
}
int ext4_trans_block_get_noread(struct ext4_blockdev *bdev,
struct ext4_block *b,
uint64_t lba)
{
int r = ext4_block_get_noread(bdev, b, lba);
if (r != EOK)
return r;
r = ext4_trans_get_write_access(bdev->fs, b);
if (r != EOK)
ext4_block_set(bdev, b);
return r;
}
int ext4_trans_block_get(struct ext4_blockdev *bdev,
struct ext4_block *b,
uint64_t lba)
{
int r = ext4_block_get(bdev, b, lba);
if (r != EOK)
return r;
r = ext4_trans_get_write_access(bdev->fs, b);
if (r != EOK)
ext4_block_set(bdev, b);
return r;
}
int ext4_trans_try_revoke_block(struct ext4_blockdev *bdev __unused,
uint64_t lba __unused)
{
int r = EOK;
#if CONFIG_JOURNALING_ENABLE
struct ext4_fs *fs = bdev->fs;
if (fs->jbd_journal && fs->curr_trans) {
struct jbd_trans *trans = fs->curr_trans;
r = jbd_trans_try_revoke_block(trans, lba);
} else if (fs->jbd_journal) {
r = ext4_block_flush_lba(fs->bdev, lba);
}
#endif
return r;
}
/**
* @}
*/