On 11/5/2012 11:48 PM, Joe Hershberger wrote:
Hi Vikram,
On Mon, Nov 5, 2012 at 11:36 AM, Vikram Narayanan<[email protected]> wrote:
Hi Joe,
On 11/5/2012 10:19 PM, Joe Hershberger wrote:
Hi Vikram,
On Mon, Nov 5, 2012 at 10:43 AM, Vikram Narayanan<[email protected]>
wrote:
On 11/2/2012 8:24 AM, Joe Hershberger wrote:
UBI can mount volumes by name or number The current code forces you
to name the volume by prepending every name with "ubi:".
From fs/ubifs/super.c
* There are several ways to specify UBI volumes when mounting UBIFS:
* o ubiX_Y - UBI device number X, volume Y;
* o ubiY - UBI device number 0, volume Y;
* o ubiX:NAME - mount UBI device X, volume with name NAME;
* o ubi:NAME - mount UBI device 0, volume with name NAME.
Now any name passed in any of the above forms are allowed.
What exactly are we gaining from this naming compared to the default?
In what way the old naming affects the end user?
The reason I needed this change is so that I could specify the volume
by number in a script instead of being forced to know the name. In
Linux you can use the volume number using the format above (it's the
same code).
If that is the case, then the one can create the partition using the below
command,
ubi createvol<vol name>
<vol name> can be any of the 4 methods listed above.
I believe that is incorrect.<vol name> is literally the name that
can be used in the form "ubiX:<vol name>". It doesn't make sense to
use the above forms when creating the volume. The ubi index is
already set by calling ubi part<mtd partition>. The volume index is
simply the next volume in that ubi.
say I've an mtdpartition by the name "filesystem"
ubi part filesystem
ubi createvol rootfs
If I invoke the above commands, I'll have a ubi volume with a name
rootfs with the complete size of (filesystem - metadata).
When passing bootargs to the kernel I'd give the root as
root=ubi0:rootfs
Why should this be wrong?
and the prefix "ubi:" will be appended in the environment which is expected
by kernel for mounting. Right?
I assume you meant prepended. Please expand on what you are saying
Yes. I meant prepended. sorry.
here. What environment variable? Prepended by what / who? Yes, the
Prepended by the string "ubi:" as you've done in this patch for some
configs.
~Vikram
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