From: Bill Kendall <wkendall@sgi.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH] xfsdump: fix metadata restore on split files
Date: Fri, 28 Oct 2011 08:35:31 -0500 [thread overview]
Message-ID: <4EAAAFA3.1070109@sgi.com> (raw)
In-Reply-To: <20111028093716.GA23069@infradead.org>
Christoph Hellwig wrote:
> On Wed, Oct 26, 2011 at 06:24:43PM -0500, Bill Kendall wrote:
>> xfsrestore does not apply certain metadata until all of the file's
>> data has been restored. This allows, for example, files with the
>> immutable flag set to be restored properly.
>>
>> While testing multi-stream restores, I noticed that files split
>> across multiple streams did not have their metadata restored.
>> Looking into this further, it also applies to the single-stream
>> case where files are split across media files, such as when a
>> backup spans multiple tapes.
>>
>> The fix is to check to see if a file is completely restored
>> whenever we hit the end of a media file. The current code
>> is broken because it relies on all media files being applied
>> during the same restore session.
>>
>> This also moves the S_ISREG() check into restore_complete_reg()
>> rather than relying on callers to make the check.
>
> Uhh, that's a nasty bug for people storing large files over multiple
> tapes. Any chance we could get an xfstests test case for this?
>
> Can we somehow simulate multiple tapes using small files?
I'll look into this.
Bill
>
> The code change looks okay to me, but I have to admit I don't really
> understand the code very well.
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next prev parent reply other threads:[~2011-10-28 13:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-26 23:24 [PATCH] xfsdump: fix metadata restore on split files Bill Kendall
2011-10-28 9:37 ` Christoph Hellwig
2011-10-28 13:35 ` Bill Kendall [this message]
2011-10-31 12:14 ` Bill Kendall
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