On Tue, 22 Jun 2021 at 18:30, Chengguang Xu <cgxu519@xxxxxxxxxxxx> wrote: > > Hello, > > Today I got a mount failure report from a docker developer about special characters in overlayfs lower/upper path. > The root cause is quite straightforward because overlayfs uses colon/comma as seperator of lowerdir layers and module options. > However, Colon/Comma characters are valid for directory name on linux so some people(especially container users) hope overlayfs > could correctly recognize and handle those directories. > > Strengthen option parsing seems a right solution for fixing the issue, what do think for this? Use backslash as an escape character. E.g. lower directory named "ab,cd:ef" needs to be passed to mount as "-olowerdir=ab\,cd\:ef" Thanks, Miklos
