* Find & remove orphan LEBs from UBIFS partition
@ 2014-01-17 9:39 Konstantin Tokarev
2014-01-17 14:59 ` Artem Bityutskiy
0 siblings, 1 reply; 4+ messages in thread
From: Konstantin Tokarev @ 2014-01-17 9:39 UTC (permalink / raw)
To: linux-mtd
Hi all,
How can I find and remove LEBs which don't correspond to known files
using internal API of UBIFS?
AFAIU, somethinng like this is done on recovery during mount, but in
my case superblock is not dirty, so I'd like to force cleanup with
custom mount option.
--
Regards,
Konstantin
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Find & remove orphan LEBs from UBIFS partition
2014-01-17 9:39 Find & remove orphan LEBs from UBIFS partition Konstantin Tokarev
@ 2014-01-17 14:59 ` Artem Bityutskiy
2014-01-17 15:03 ` Konstantin Tokarev
0 siblings, 1 reply; 4+ messages in thread
From: Artem Bityutskiy @ 2014-01-17 14:59 UTC (permalink / raw)
To: Konstantin Tokarev; +Cc: linux-mtd
On Fri, 2014-01-17 at 13:39 +0400, Konstantin Tokarev wrote:
> Hi all,
>
> How can I find and remove LEBs which don't correspond to known files
> using internal API of UBIFS?
> AFAIU, somethinng like this is done on recovery during mount, but in
> my case superblock is not dirty, so I'd like to force cleanup with
> custom mount option.
Are you trying to do something like 'secure deletion' ? Disclosing your
intentions would help understanding what you need. I do not quite
understand.
Do you want to fine all LEBs which do not contain anything useful like
data or meta-data, and unmap them?
--
Best Regards,
Artem Bityutskiy
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Find & remove orphan LEBs from UBIFS partition
2014-01-17 14:59 ` Artem Bityutskiy
@ 2014-01-17 15:03 ` Konstantin Tokarev
2014-01-17 15:06 ` Artem Bityutskiy
0 siblings, 1 reply; 4+ messages in thread
From: Konstantin Tokarev @ 2014-01-17 15:03 UTC (permalink / raw)
To: dedekind1@gmail.com; +Cc: linux-mtd@lists.infradead.org
17.01.2014, 18:59, "Artem Bityutskiy" <dedekind1@gmail.com>:
> On Fri, 2014-01-17 at 13:39 +0400, Konstantin Tokarev wrote:
>
>> Hi all,
>>
>> How can I find and remove LEBs which don't correspond to known files
>> using internal API of UBIFS?
>> AFAIU, somethinng like this is done on recovery during mount, but in
>> my case superblock is not dirty, so I'd like to force cleanup with
>> custom mount option.
>
> Are you trying to do something like 'secure deletion' ? Disclosing your
> intentions would help understanding what you need. I do not quite
> understand.
>
> Do you want to fine all LEBs which do not contain anything useful like
> data or meta-data, and unmap them?
Yes, exactly.
--
Regards,
Konstantin
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Find & remove orphan LEBs from UBIFS partition
2014-01-17 15:03 ` Konstantin Tokarev
@ 2014-01-17 15:06 ` Artem Bityutskiy
0 siblings, 0 replies; 4+ messages in thread
From: Artem Bityutskiy @ 2014-01-17 15:06 UTC (permalink / raw)
To: Konstantin Tokarev; +Cc: linux-mtd@lists.infradead.org
On Fri, 2014-01-17 at 19:03 +0400, Konstantin Tokarev wrote:
>
> 17.01.2014, 18:59, "Artem Bityutskiy" <dedekind1@gmail.com>:
> > On Fri, 2014-01-17 at 13:39 +0400, Konstantin Tokarev wrote:
> >
> >> Hi all,
> >>
> >> How can I find and remove LEBs which don't correspond to known files
> >> using internal API of UBIFS?
> >> AFAIU, somethinng like this is done on recovery during mount, but in
> >> my case superblock is not dirty, so I'd like to force cleanup with
> >> custom mount option.
> >
> > Are you trying to do something like 'secure deletion' ? Disclosing your
> > intentions would help understanding what you need. I do not quite
> > understand.
> >
> > Do you want to fine all LEBs which do not contain anything useful like
> > data or meta-data, and unmap them?
>
> Yes, exactly.
Check 'fixup_free_space', it iterates over all useful ones, the rest can
be unmapped.
--
Best Regards,
Artem Bityutskiy
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-01-17 15:06 UTC | newest]
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2014-01-17 9:39 Find & remove orphan LEBs from UBIFS partition Konstantin Tokarev
2014-01-17 14:59 ` Artem Bityutskiy
2014-01-17 15:03 ` Konstantin Tokarev
2014-01-17 15:06 ` Artem Bityutskiy
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