f2fs: update inode info to inode page for new file

After checkpoint,
 1. creat a new file A ,(with dirty inode && dirty inode page && xattr info)
 2. backgroud wb write back file A inode page (without update from inode cache)
 3. fsync file A, write back inode page of file A with inode cache info
 4. sudden power off before new checkpoint

In this case, recovery process will try to recover a zero inode
page. Inline xattr flag of file A will be miss and xattr info
will be taken as blkaddr index.

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Author: Yunlei He

fs/f2fs/node.c

@@ -2207,7 +2207,9 @@ void recover_inline_xattr(struct inode *inode, struct page *page)
 	f2fs_bug_on(F2FS_I_SB(inode), IS_ERR(ipage));
 
 	ri = F2FS_INODE(page);
-	if (!(ri->i_inline & F2FS_INLINE_XATTR)) {
+	if (ri->i_inline & F2FS_INLINE_XATTR) {
+		set_inode_flag(inode, FI_INLINE_XATTR);
+	} else {
 		clear_inode_flag(inode, FI_INLINE_XATTR);
 		goto update_inode;
 	}