f2fs: fix a missing size change in f2fs_setattr

This patch fix a missing size change in f2fs_setattr
Signed-off-by: NYunlei He <heyunlei@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/file.c

@@ -677,6 +677,7 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
 {
 	struct inode *inode = d_inode(dentry);
 	int err;
+	bool size_changed = false;
 
 	err = setattr_prepare(dentry, attr);
 	if (err)
@@ -707,6 +708,8 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
 			}
 			inode->i_mtime = inode->i_ctime = current_time(inode);
 		}
+
+		size_changed = true;
 	}
 
 	__setattr_copy(inode, attr);
@@ -719,8 +722,8 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
 		}
 	}
 
-	/* update attributes only */
-	f2fs_mark_inode_dirty_sync(inode, false);
+	/* file size may changed here */
+	f2fs_mark_inode_dirty_sync(inode, size_changed);
 
 	/* inode change will produce dirty node pages flushed by checkpoint */
 	f2fs_balance_fs(F2FS_I_SB(inode), true);