Re: [PATCH 0/3] fs_parser: handle parameters that can be empty and don't have a value

[Eric Sandeen <sandeen@xxxxxxxxxxx>]

On 3/1/24 7:12 AM, Christian Brauner wrote:
>> Unfortunately, the two filesystems that use this flag (ext4 and overlayfs)
>> aren't prepared to have the parameter value set to NULL.  Patches #2 and #3
>> fix this.
> 
> Both ext4 and overlayfs define
> 
> #define fsparam_string_empty(NAME, OPT) \
>         __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL)
> 
> Please add that to include/linux/fs_parser.h so that it can be used by both.

The f2fs conversion will also need this, so yes, it'd be nice to hoist it out
of ext4 and overlayfs.

-Eric