newbie: dynamic partition creation possible

[Marius Groeger]

On Tue, 20 Aug 2002, Michael Palme wrote:

> the flash devices (no filesystem etc.). i need different "partitions" on
> the flash and i dont want to hardcode that --
> i have seen in cmdline.c that this is possible via kernel parameters.
> i'm not absolutely sure what kernel options are needed and what are
> unnecessary.

What is unclear with it? cmdline.c contains examples how to use it. Actually
it can be very simple. For instance, the following term will give you two
partitions, one with 1 MiB and another with all the rest. Both will be
read-write and will receive standard labels:

   mtdparts=my-mtd-id:1m,-

However, you may have to adapt the mapping driver to use the cmdline
partitioning. Here's how:

   int num_mtd_parts, result;
   struct mtd_partition *mtd_parts;
   struct mtd_info mtd;

   num_mtd_parts = parse_cmdline_partitions(&mtd, &mtd_parts, "my-mtd-id");
   result = add_mtd_partitions (&mtd, mtd_parts, num_mtd_parts);

As an aside: it is good (but rare) practice to use the various CONFIG_
options for partitioning features.

Regards,
Marius

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Marius Groeger           SYSGO Real-Time Solutions GmbH     mgroeger at sysgo.de
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