From mboxrd@z Thu Jan  1 00:00:00 1970
From: Lukasz Majewski <lukma@denx.de>
Date: Thu, 1 Jun 2017 20:20:37 +0200
Subject: [U-Boot] [PATCH v2 5/6] rename GPT partitions to detect boot
	failure
In-Reply-To: <080df5158b30ff0e86f63ba00eca6132@she-devel.com>
References: <20170526123845.GI10782@bill-the-cat>
 <1496076573-14495-1-git-send-email-alison@peloton-tech.com>
 <1496076573-14495-6-git-send-email-alison@peloton-tech.com>
 <20170531101246.7e51b038@jawa>
 <8e8e37eb178dc8501a00b4139a95e19e@she-devel.com>
 <20170601102145.10d96592@jawa>
 <080df5158b30ff0e86f63ba00eca6132@she-devel.com>
Message-ID: <20170601202037.6eacdf61@jawa>
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To: u-boot@lists.denx.de

Hi 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 think that this is enough. Let's wait for other's opinions (if
any).

> 
> 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 http://{ she-devel.com, exerciseforthereader.org } 
> "We are giving up our privacy, one convenience at a time." --
> Evangelos Simoudis



Best regards,

Lukasz Majewski

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