Re: [PATCH] mkfs.ubifs: support --squash-uids

Hamish Moffatt
2008-05-08T00:16:39Z

On Tue, May 06, 2008 at 01:23:12PM +0300, Artem Bityutskiy wrote:
> Fundamentally, mkfs.ubifs has to know FS size because UBIFS maintains
> and stores per-LEB information (like amount of dirty and free space in
> each LEB) in so-called LPT area on the media. So obviously, the size of
> this area depends on the total amount of LEBs, i.e. on the volume size.

OK (and thanks for adding this information to the web site also.)

In my case I am preparing images with mkfs.ubifs, and mounting them
read-only on my embedded target. In that case, could the max LEB count
be calculated automatically to fit the files and the LPT area?

I added support for ubifs images into buildroot. The user must configure
their LEB size, max I/O size, and max LEB count as these are all
required for mkfs.ubifs. Is there a formula to calculate an approximate
max LEB count from the volume size and LEB size? I will need to improve
the documentation for these parameters shown to the buildroot users
(although probably I'm the only one using the ubifs target so far!).

thanks
Hamish
--
Hamish Moffatt VK3SB <hamish@debian.org> <hamish@cloud.net.au>