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From: Eric Sandeen <sandeen@redhat.com>
To: Christoph Hellwig <hch@infradead.org>,
	Jeff Layton <jlayton@redhat.com>,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	esandeen@redhat.com, aviro@redhat.com
Subject: Re: [PATCH 2/3] change libfs sb creation routines to avoid collisions with their root inodes
Date: Wed, 10 Jan 2007 15:51:33 -0600	[thread overview]
Message-ID: <45A55FE5.80907@redhat.com> (raw)
In-Reply-To: <20070110212215.GB4425@infradead.org>

Christoph Hellwig wrote:

> 
>>  		return -ENOMEM;
>> +	/* set to high value to try and avoid collisions with loop below */
>> +	inode->i_ino = 0xffffffff;
>> +	insert_inode_hash(inode);
> 
> This is odd.  Can't we just add some constant base to the loop below?
>
I thought the same thing, but Jeff pointed out that
nfsctl_transaction_write does ops based on inode numbers, and they maybe
can't move around?

        rv =  write_op[ino](file, data, size);

However, nfsd's call to simple_fill_super already sends in a set of
files starting at inode 2:

enum {
        NFSD_Root = 1,
        NFSD_Svc,
...

        static struct tree_descr nfsd_files[] = {
                [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
...
        return simple_fill_super(sb, 0x6e667364, nfsd_files);

which does...

      for (i = 0; !files->name || files->name[0]; i++, files++) {
                if (!files->name)
                        continue;
...
                inode->i_ino = i;

So I think it's already expecting the root inode at one, and the other
files starting at 2?

-Eric

  reply	other threads:[~2007-01-10 21:52 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-08 20:47 Jeff Layton
2007-01-10 21:22 ` Christoph Hellwig
2007-01-10 21:51   ` Eric Sandeen [this message]
2007-01-11 16:46     ` Jeff Layton
  -- strict thread matches above, loose matches on Subject: below --
2007-01-16 18:57 Jeff Layton
2007-01-11 20:15 Jeff Layton
2007-01-11 20:08 Jeff Layton
2007-01-11 19:43 Jeff Layton
2006-12-29 19:11 Jeff Layton

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