From: Lukasz Majewski <l.majewski@samsung.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] gpt: GUID/UUID - GPT restoration - open questions
Date: Fri, 07 Sep 2012 08:45:59 +0200 [thread overview]
Message-ID: <20120907084559.7d7453dd@amdc308.digital.local> (raw)
In-Reply-To: <5048F224.5090009@wwwdotorg.org>
Hi Stephen,
> On 09/06/2012 08:14 AM, Lukasz Majewski wrote:
> > Hi Rob,
> >
> >> The question I'm asking is why we need partition creation support
> >> in u-boot in the first place?
> >
> > Please consider following scenarios:
> >
> > 1. eMMC content is exported to the user (via UMS USB Mass Storage).
> > Then user by chance or on purpose will corrupt MBR/GPT.
> >
> > 2. misuse of "mmc" command - user by chance writes mmc erase 0.
> >
> > To unbrick the device one would simply use "gpt/part restore"
> > command with already defined at ./include/config/{target}.h default
> > settings for partitions.
> >
> >> Next you need filesystem creation too?
> >
> > I can use UMS to export eMMC to host PC (with restored partitions)
> > and then use mkfs.* to create proper file system.
>
> In that case, wouldn't you be exposing the entire eMMC device over
> UMS, and hence the user could just run fdisk/parted/... on the host,
> just like you're proposing they run mkfs on the host?
This would be one option for restoring GPT table.
However, I believe, that there also should be a separate gpt command to
do the trick and restore default GPT (with default partitions) only
from u-boot (with no UMS interaction).
Additionally it is far more user friendly, when one type "gpt default"
and default partitions are restored for a particular board (stored
at ./include/configs/{board}.h .
--
Best regards,
Lukasz Majewski
Samsung Poland R&D Center | Linux Platform Group
next prev parent reply other threads:[~2012-09-07 6:45 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-24 8:13 [U-Boot] [PATCH 0/6] gpt: GUID Partition Table (GPT) restoration Lukasz Majewski
2012-08-24 8:13 ` [U-Boot] [PATCH 1/6] gpt:doc: GPT (GUID Partition Table) documentation Lukasz Majewski
2012-09-05 19:31 ` Stephen Warren
2012-09-06 9:22 ` Lukasz Majewski
2012-08-24 8:13 ` [U-Boot] [PATCH 2/6] gpt: Replace the leXX_to_int() calls with ones defined at <compiler.h> Lukasz Majewski
2012-09-05 19:35 ` Stephen Warren
2012-09-06 10:20 ` Lukasz Majewski
2012-09-06 18:53 ` Stephen Warren
[not found] ` <SNT002-W181FE3CE14BE68990CDF80CCB920@phx.gbl>
2012-09-12 14:42 ` Lukasz Majewski
2012-09-05 19:45 ` Stephen Warren
2012-09-06 10:15 ` Lukasz Majewski
2012-08-24 8:13 ` [U-Boot] [PATCH 3/6] gpt: Replacement of GPT structures members with ones indicating endianness and size Lukasz Majewski
2012-09-05 19:41 ` Stephen Warren
2012-09-06 10:24 ` Lukasz Majewski
2012-08-24 8:13 ` [U-Boot] [PATCH 4/6] gpt: Support for GPT (GUID Partition Table) restoration Lukasz Majewski
2012-09-05 19:49 ` Stephen Warren
2012-09-06 11:19 ` Lukasz Majewski
2012-09-06 18:55 ` Stephen Warren
2012-09-05 20:19 ` Stephen Warren
2012-10-03 23:00 ` [U-Boot] [U-Boot, " Tom Rini
2012-10-04 7:18 ` [U-Boot] [u-boot] Adding missing CONFIG_SYS_CACHELINE_SIZE to boards definitions Lukasz Majewski
2012-10-04 8:28 ` esw
2012-10-18 18:48 ` Albert ARIBAUD
2012-10-04 9:02 ` Helmut Raiger
2012-08-24 8:13 ` [U-Boot] [PATCH 5/6] gpt: Support for new "gpt" command Lukasz Majewski
2012-09-05 20:08 ` Stephen Warren
2012-09-06 14:01 ` Lukasz Majewski
2012-08-24 8:13 ` [U-Boot] [PATCH 6/6] gpt: Enable support for GPT partition table restoration at Samsung's Trats Lukasz Majewski
2012-08-24 8:48 ` [U-Boot] gpt: GUID/UUID - GPT restoration - open questions Lukasz Majewski
2012-09-05 20:21 ` Stephen Warren
2012-09-06 11:27 ` Lukasz Majewski
2012-09-06 12:27 ` Rob Herring
2012-09-06 14:14 ` Lukasz Majewski
2012-09-06 18:57 ` Stephen Warren
2012-09-07 6:45 ` Lukasz Majewski [this message]
2012-09-03 9:28 ` [U-Boot] gpt: GUID/UUID - GPT restoration - open questions - RESEND Lukasz Majewski
2012-10-02 13:46 ` Simon Glass
2012-10-02 16:39 ` Lukasz Majewski
2012-09-03 9:30 ` [U-Boot] [PATCH 0/6] gpt: GUID Partition Table (GPT) restoration Lukasz Majewski
2012-09-12 14:50 ` [U-Boot] [PATCH v2 0/7] " Lukasz Majewski
2012-09-12 14:50 ` [U-Boot] [PATCH v2 1/7] vsprintf:fix: Change type returned by ustrtoul Lukasz Majewski
2012-09-12 14:50 ` [U-Boot] [PATCH v2 2/7] part:efi: Move part_efi.h file to ./include Lukasz Majewski
2012-09-12 14:50 ` [U-Boot] [PATCH v2 3/7] gpt:doc: GPT (GUID Partition Table) documentation Lukasz Majewski
2012-09-12 14:50 ` [U-Boot] [PATCH v2 4/7] gpt: The leXX_to_int() calls replaced with ones defined at <compiler.h> Lukasz Majewski
2012-09-12 14:50 ` [U-Boot] [PATCH v2 5/7] gpt: Support for GPT (GUID Partition Table) restoration Lukasz Majewski
2012-09-12 17:22 ` Tom Rini
2012-09-12 14:50 ` [U-Boot] [PATCH v2 6/7] gpt: Support for new "gpt" command Lukasz Majewski
2012-09-12 17:21 ` Tom Rini
2012-09-12 14:50 ` [U-Boot] [PATCH v2 7/7] gpt: Enable support for GPT partition table restoration at Samsung's Trats Lukasz Majewski
2012-09-12 17:23 ` [U-Boot] [PATCH v2 0/7] gpt: GUID Partition Table (GPT) restoration Tom Rini
2012-09-13 6:20 ` Lukasz Majewski
2012-09-13 17:39 ` Tom Rini
2012-09-13 8:09 ` [U-Boot] [PATCH v3 " Lukasz Majewski
2012-09-13 8:09 ` [U-Boot] [PATCH v3 1/7] vsprintf:fix: Change type returned by ustrtoul Lukasz Majewski
2012-09-13 8:10 ` [U-Boot] [PATCH v3 2/7] part:efi: Move part_efi.h file to ./include Lukasz Majewski
2012-09-13 18:54 ` Kim Phillips
2012-09-13 8:10 ` [U-Boot] [PATCH v3 3/7] gpt:doc: GPT (GUID Partition Table) documentation Lukasz Majewski
2012-09-17 17:58 ` Stephen Warren
2012-10-05 10:35 ` Lukasz Majewski
2012-10-05 15:19 ` Lukasz Majewski
2012-10-05 16:05 ` Stephen Warren
2012-09-13 8:10 ` [U-Boot] [PATCH v3 4/7] gpt: The leXX_to_int() calls replaced with ones defined at <compiler.h> Lukasz Majewski
2012-09-13 8:10 ` [U-Boot] [PATCH v3 5/7] gpt: Support for GPT (GUID Partition Table) restoration Lukasz Majewski
2012-09-17 18:07 ` Stephen Warren
2012-10-05 10:50 ` Lukasz Majewski
2012-09-13 8:10 ` [U-Boot] [PATCH v3 6/7] gpt: Support for new "gpt" command Lukasz Majewski
2012-09-13 8:10 ` [U-Boot] [PATCH v3 7/7] gpt: Enable support for GPT partition table restoration at Samsung's Trats Lukasz Majewski
2012-11-09 9:22 ` [U-Boot] [PATCH v4 0/7] gpt: GUID Partition Table (GPT) restoration Piotr Wilczek
2012-11-09 9:22 ` [U-Boot] [PATCH v4 1/7] vsprintf:fix: Change type returned by ustrtoul Piotr Wilczek
2012-11-19 19:19 ` Stephen Warren
2012-11-09 9:22 ` [U-Boot] [PATCH v4 2/7] part:efi: Move part_efi.h file to ./include Piotr Wilczek
2012-11-19 19:30 ` Stephen Warren
2012-11-19 20:41 ` Tom Rini
2012-11-20 17:46 ` Lukasz Majewski
2012-11-09 9:22 ` [U-Boot] [PATCH v4 3/7] gpt:doc: GPT (GUID Partition Table) documentation Piotr Wilczek
2012-11-19 19:28 ` Stephen Warren
2012-11-09 10:48 ` [U-Boot] [PATCH v4 4/7] gpt: The leXX_to_int() calls replaced with ones defined at <compiler.h> Piotr Wilczek
2012-11-09 10:48 ` [U-Boot] [PATCH v4 5/7] gpt: Support for GPT (GUID Partition Table) restoration Piotr Wilczek
2012-11-19 20:16 ` Stephen Warren
2012-11-21 13:18 ` Piotr Wilczek
2012-11-22 12:16 ` Lukasz Majewski
2012-11-26 23:46 ` Stephen Warren
2012-11-24 18:05 ` Stephen Warren
2012-11-26 13:08 ` Piotr Wilczek
2012-11-09 10:48 ` [U-Boot] [PATCH v4 6/7] gpt: Support for new "gpt" command Piotr Wilczek
2012-11-19 21:34 ` Stephen Warren
2012-11-21 11:22 ` Piotr Wilczek
2012-11-24 18:00 ` Stephen Warren
2012-11-26 13:08 ` Piotr Wilczek
2012-11-26 23:49 ` Stephen Warren
2012-11-09 10:48 ` [U-Boot] [PATCH v4 7/7] gpt: Enable support for GPT partition table restoration at Samsung's Trats Piotr Wilczek
2012-11-19 19:39 ` [U-Boot] [PATCH v4 4/7] gpt: The leXX_to_int() calls replaced with ones defined at <compiler.h> Stephen Warren
2012-11-19 20:43 ` [U-Boot] [PATCH v4 0/7] gpt: GUID Partition Table (GPT) restoration Tom Rini
2012-12-06 20:40 ` Tom Rini
2012-12-07 9:03 ` Piotr Wilczek
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