linux-kernel - Re: [PATCH 0/3] vfs: plug some holes involving LAST_BIND symlinks and file bind mounts (try #5)

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Date:	Tue, 1 Dec 2009 08:56:40 +0000
From:	Duane Griffin <duaneg@...da.com>
To:	Jamie Lokier <jamie@...reable.org>
Cc:	Pavel Machek <pavel@....cz>, Miklos Szeredi <miklos@...redi.hu>,
	Jeff Layton <jlayton@...hat.com>, ebiederm@...ssion.com,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	viro@...iv.linux.org.uk
Subject: Re: [PATCH 0/3] vfs: plug some holes involving LAST_BIND symlinks and 
	file bind mounts (try #5)

2009/11/30 Jamie Lokier <jamie@...reable.org>:
> Duane Griffin wrote:
>> 2009/11/24 Pavel Machek <pavel@....cz>:
>> > On Tue 2009-11-24 12:53:09, Miklos Szeredi wrote:
>> >> I still believe leaving the current semantics and documenting them is
>> >> the best option.
>> >
>> > I believe that current semantics is ugly enough that 'documenting' it
>> > is not enough... and people want to port from other systems, too, not
>> > expecting nasty surprises like this...
>>
>> Solaris 10 works the same way as Linux does now, so I don't think the
>> porting argument gets you anywhere.
>
> It certainly must be similar, as gnulib uses the same technique on
> both Solaris and Linux.
>
> I don't have a Solaris to try this on.  Can you use /proc to re-open
> with O_RDWR a file descriptor previously opened with O_RDONLY on
> Solaris 10, assuming the underlying inode allows writing?

Yep, I basically followed Pavel's recipe and got the same result. On
the other hand, it didn't work on AIX.

> -- Jamie

Cheers,
Duane.

-- 
"I never could learn to drink that blood and call it wine" - Bob Dylan
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