Add macros UBLK_CONTROL and UBLKC_PREFIX

[mattysweeps]

Some users might mount devtmpfs to a location other than /dev.
This means the /dev/ublk-control device might exist at a different
location on the filesystem.

Similarly /dev/ublkc[0-9] devices might exist in different places.

The macros UBLK_CONTROL and UBLKC_PREFIX configure the locations of
these devices. UBLK_CONTROL is the full name of the control device,
and UBLKC_PREFIX is the parent directory of all ublkc[0-9] devices.

Fixes #74

[ming1]

Hello,

I feel it is still not flexible by just adding macro of DEVTMPFS, what do you thinking of adding macros of UBLK_CONTROL and UBLKC_PREFIX?

Maybe someone add udev rule to change ublkc to other name?

Thanks,

[mattysweeps]

Hello,

I feel it is still not flexible by just adding macro of DEVTMPFS, what do you thinking of adding macros of UBLK_CONTROL and UBLKC_PREFIX?

Maybe someone add udev rule to change ublkc to other name?

Thanks,

Thanks @ming1,

Sure thing. I updated the commit to have UBLK_CONTROL and UBLKC_PREFIX respectively.
Also please let me know what style you prefer for the configure flag. (--with-ublk_control or --with-ublk-control)

[ming1]

Hello,
I feel it is still not flexible by just adding macro of DEVTMPFS, what do you thinking of adding macros of UBLK_CONTROL and UBLKC_PREFIX?
Maybe someone add udev rule to change ublkc to other name?
Thanks,

Thanks @ming1,

Sure thing. I updated the commit to have UBLK_CONTROL and UBLKC_PREFIX respectively. Also please let me know what style you prefer for the configure flag. (--with-ublk_control or --with-ublk-control)

I am fine with either one, but maybe '--with-ublk-control' can save one key, :-)