int journal_force_commit(journal_t *journal)
{
handle_t *handle;
int ret;
handle = journal_start(journal, 1);
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
} else {
handle->h_sync = 1;
ret = journal_stop(handle);
}
return ret;
}
static int _mlowerfs_ext3_journal_stop(handle_t *handle)
{
struct super_block *sb;
int err;
int rc;
sb = handle->h_transaction->t_journal->j_private;
err = handle->h_err;
rc = journal_stop(handle);
if (!err)
err = rc;
return err;
}
int ocfs2_commit_trans(struct ocfs2_super *osb,
handle_t *handle)
{
int ret;
struct ocfs2_journal *journal = osb->journal;
BUG_ON(!handle);
ret = journal_stop(handle);
if (ret < 0)
mlog_errno(ret);
up_read(&journal->j_trans_barrier);
return ret;
}
static int ext3fs_create(struct node *parent_node, struct node *node) {
struct fs_driver *drv;
struct ext2_fs_info *fsi;
journal_handle_t *handle;
int res = -1;
if(NULL == (drv = fs_driver_find_drv(EXT2_NAME))) {
return -1;
}
fsi = parent_node->nas->fs->fsi;
/**
* ext3_trans_blocks(1) - to modify parent_node's data block
* 2 blocks for child = 1 inode + 1 inode bitmap.
* 2 * (ext3_trans_blocks(1) + 2) blocks to create "." and ".."
*/
if (!(handle = journal_start(fsi->journal, 3 * (ext3_trans_blocks(1) + 2)))) {
return -1;
}
res = drv->fsop->create_node(parent_node, node);
journal_stop(handle);
return res;
}
static size_t ext3fs_write(struct file_desc *desc, void *buff, size_t size) {
struct fs_driver *drv;
int res;
size_t datablocks;
struct ext2_fs_info *fsi;
journal_handle_t *handle;
if (NULL == (drv = fs_driver_find_drv(EXT2_NAME))) {
return -1;
}
assert(desc->node);
fsi = desc->node->nas->fs->fsi;
/* N * SECTOR_SIZE + K bytes of data can dirty N + 2 only if K >= 2 */
datablocks = (size + SECTOR_SIZE - 2) / SECTOR_SIZE + 1;
/* TODO recalculate */
if (!(handle = journal_start(fsi->journal, 4 * ext3_trans_blocks(datablocks)))) {
return -1;
}
res = drv->file_op->write(desc, buff, size);
journal_stop(handle);
return res;
}
static int ext3fs_delete(struct node *node) {
struct fs_driver *drv;
struct ext2_fs_info *fsi;
journal_handle_t *handle;
int res;
if(NULL == (drv = fs_driver_find_drv(EXT2_NAME))) {
return -1;
}
fsi = node->nas->fs->fsi;
/**
* Same as in ext3fs_create:
* ext3_trans_blocks(1) - to modify parent_node's data block
* 2 blocks for child = 1 inode + 1 inode bitmap
*/
if (!(handle = journal_start(fsi->journal, ext3_trans_blocks(1) + 2))) {
return -1;
}
res = drv->fsop->delete_node(node);
journal_stop(handle);
return res;
}
