All of lore.kernel.org
 help / color / mirror / Atom feed
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.

_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs

  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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4EAAAFA3.1070109@sgi.com \
    --to=wkendall@sgi.com \
    --cc=hch@infradead.org \
    --cc=xfs@oss.sgi.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.