[U-Boot] [PATCH v2 5/6] rename GPT partitions to detect boot failure

[Chaiken, Alison]

Lukasz Majewski wrote:

> Maybe it would be better to have
> 
> gpt flip mmc 0 <optional parameter 'name'>
> 
> (By default we have "primary" and "backup")
> 
> In that way we could set other names to GPT partitions without the
> need to modify the code.

I answered: 

>> Another possibility is to support
>> 
>> gpt flip mmc 0 <name 1> <name 2>
>> 
>> where two names are required, with defaults 'primary' and 'backup'.   
>> Perhaps I should rework patch 5 that way?

Lukasz responded: 

> Please correct my understanding if I'm wrong.
> 
> You parse GPT partitions to a list and there are only two names
> possible:
> 
> "primary" and "backup".
> 
> When we call gpt filp we rename those names ("primary" -> "backup" and
> the other way).
> 
> Ahhh..... so your patch would allow to rename "primary" to <name1> and
> "backup" to <name2> for all names.
> 
> My idea was rather to have a gpt call to set name of a GPT partition....

> I can image that somebody would like to change on the fly single GPT
> partition name (when having/care about 2 partitions for his/her project
> specific data).
> 
> But, I don't know how much effort it would take to implement it (and if
> others would see it beneficial).

I would propose then two options: 

    gpt rename mmc 0 <name 1> <name 2> 

which renames all the 1's to 2's, and 

    gpt flip mmc 0 <name 1> <name 2> 

which swaps the two name strings for all partitions where they're found.
 These two operations together with 'gpt write' then cover all the
common use cases I can imagine. 

I'm open to any other suggestions, of course.   I just posted what I
already had to get started. 

-- Alison 

---
Alison Chaiken                      alison at she-devel.com, 650-279-5600 
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