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f2fs: cleanup path to need cp at fsync

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Added some commentaries for code readability and cleaned up if-statement
clearly.

Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Changman Lee 2014-12-08 15:29:41 +09:00 committed by Jaegeuk Kim
parent 9c7bb70212
commit 51455b1938
1 changed files with 46 additions and 39 deletions
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85
fs/f2fs/file.c
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@ -149,6 +149,26 @@ static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
return ret;
}
static void try_to_fix_pino(struct inode *inode)
{
struct f2fs_inode_info *fi = F2FS_I(inode);
nid_t pino;
down_write(&fi->i_sem);
fi->xattr_ver = 0;
if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
get_parent_ino(inode, &pino)) {
fi->i_pino = pino;
file_got_pino(inode);
up_write(&fi->i_sem);
mark_inode_dirty_sync(inode);
f2fs_write_inode(inode, NULL);
} else {
up_write(&fi->i_sem);
}
}
int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
{
struct inode *inode = file->f_mapping->host;
@ -213,49 +233,36 @@ go_write:
up_read(&fi->i_sem);
if (need_cp) {
nid_t pino;
/* all the dirty node pages should be flushed for POR */
ret = f2fs_sync_fs(inode->i_sb, 1);
down_write(&fi->i_sem);
fi->xattr_ver = 0;
if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
get_parent_ino(inode, &pino)) {
fi->i_pino = pino;
file_got_pino(inode);
up_write(&fi->i_sem);
mark_inode_dirty_sync(inode);
ret = f2fs_write_inode(inode, NULL);
if (ret)
goto out;
} else {
up_write(&fi->i_sem);
}
} else {
sync_nodes:
sync_node_pages(sbi, ino, &wbc);
if (need_inode_block_update(sbi, ino)) {
mark_inode_dirty_sync(inode);
ret = f2fs_write_inode(inode, NULL);
if (ret)
goto out;
goto sync_nodes;
}
ret = wait_on_node_pages_writeback(sbi, ino);
if (ret)
goto out;
/* once recovery info is written, don't need to tack this */
remove_dirty_inode(sbi, ino, APPEND_INO);
clear_inode_flag(fi, FI_APPEND_WRITE);
flush_out:
remove_dirty_inode(sbi, ino, UPDATE_INO);
clear_inode_flag(fi, FI_UPDATE_WRITE);
ret = f2fs_issue_flush(sbi);
/*
* We've secured consistency through sync_fs. Following pino
* will be used only for fsynced inodes after checkpoint.
*/
try_to_fix_pino(inode);
goto out;
}
sync_nodes:
sync_node_pages(sbi, ino, &wbc);
if (need_inode_block_update(sbi, ino)) {
mark_inode_dirty_sync(inode);
f2fs_write_inode(inode, NULL);
goto sync_nodes;
}
ret = wait_on_node_pages_writeback(sbi, ino);
if (ret)
goto out;
/* once recovery info is written, don't need to tack this */
remove_dirty_inode(sbi, ino, APPEND_INO);
clear_inode_flag(fi, FI_APPEND_WRITE);
flush_out:
remove_dirty_inode(sbi, ino, UPDATE_INO);
clear_inode_flag(fi, FI_UPDATE_WRITE);
ret = f2fs_issue_flush(sbi);
out:
trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
return ret;