From mboxrd@z Thu Jan 1 00:00:00 1970 From: Seewer Philippe Subject: Re: Redundant nfsroot cmdline options Date: Thu, 18 Jun 2009 09:07:56 +0200 Message-ID: <4A39E7CC.8040506@bfh.ch> References: <4A36A510.5010709@redhat.com> <20090617034849.GA22705@thedillows.org> <4A386B20.9010205@redhat.com> <4A3898E0.8090700@bfh.ch> <4A394352.1010007@redhat.com> <4A39543D.9040206@redhat.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4A39543D.9040206-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> Sender: initramfs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Warren Togami Cc: initramfs Warren Togami wrote: > On 06/17/2009 03:26 PM, Warren Togami wrote: >>> # "/tftpboot/%s" will be used. >> >> This part about /tftpboot/ and the accompanying implementation in >> 95nfs/nfsroot seems baffling. >> >> * In what cases does hostname lookup actually work here? >> * Where does this precedent come from? This seems to be a really narrow >> implementation from some specific past software with hard-coded >> assumptions. >> * For example /tftpboot isn't used by default configurations of tftp >> servers on modern Debian, Ubuntu or Fedora anymore. They've moved to >> FHS-compliant /var/lib/tftpboot. But then again nothing demands that the >> sysadmin sticks with any particular path for the tftp server. >> * What does tftpboot have to do with initrd? The initrd doesn't have >> anything to do with tftp at this stage. > > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=Documentation/filesystems/nfsroot.txt > > > OK, I see in the Legacy documentation... > > /tftpboot is only a default set if no path is provided. You can > apparently have any path with an optional %s which is replaced by the > kernel. In our case however we need to replace the %s ourselves. > >> 62 Name of the directory on the server to mount as root. >> 63 If there is a "%s" token in the string, it will be >> 64 replaced by the ASCII-representation of the client's >> 65 IP address. > > The documentation only mentions "ASCII-representation of the client's IP > address", not hostname that 95nfs/nfsroot seems to indicate. > > Where did the idea that %s is hostname come from? The commit that introduced it is here: http://dracut.git.sourceforge.net/git/gitweb.cgi?p=dracut;a=commitdiff;h=abe9ccc89a96bc61bc2e9d3169341821393da6da Regards, Philippe -- To unsubscribe from this list: send the line "unsubscribe initramfs" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html