From: greg@kroah.com (Greg KH)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Linux Kernel readlink equivalent
Date: Thu, 29 Jan 2015 11:37:37 -0800 [thread overview]
Message-ID: <20150129193737.GA3135@kroah.com> (raw)
In-Reply-To: <CABEmWXEPBKaAOCGYTUCEtxcPMOqpj+phUaof1rZC1-4Bn0pv4w@mail.gmail.com>
On Thu, Jan 29, 2015 at 01:11:13PM -0500, David Legault wrote:
> Hello,
>
> I'm working on some linux kernel driver stuff and I have a fake path called /
> dev/blah/whatever that points to /dev/block/real_device.
That's a userspace "path", right? Why would the kernel care about this?
> The issue is that lookup_bdev will fail to follow the symlink so I'd like to
> massage the path upfront by getting the real path (/dev/block/real_device) so I
> can hand that off to lookup_bdev so it returns successfully instead of an
> error.
Why are you calling this from within the kernel? You should have a bdev
already directly within the kernel, no need to muck around in /dev/
What exactly are you doing that you feel you need access to a block
device node?
thanks,
greg k-h
next prev parent reply other threads:[~2015-01-29 19:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-29 18:11 Linux Kernel readlink equivalent David Legault
2015-01-29 19:24 ` Valdis.Kletnieks at vt.edu
2015-01-29 19:37 ` Greg KH [this message]
2015-01-30 16:02 ` David Legault
2015-01-30 16:36 ` Valdis.Kletnieks at vt.edu
2015-01-30 17:17 ` Greg KH
2015-01-30 6:07 ` Aruna Hewapathirane
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