linux-kernel - [RFC]nbd-client connect error

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Message-ID: <CAD+1EGNiUMhrbH6cWXKXEN5hWagiUcGCXb1E9Z_knCbKrniXbA@mail.gmail.com>
Date:	Mon, 25 Jul 2011 14:13:53 +0800
From:	harryxiyou <harryxiyou@...il.com>
To:	wouter@...ian.org
Cc:	hua kang <xiyoucloud@...il.com>, linux-kernel@...r.kernel.org,
	linux-kernel@...kernel.org,
	Américo Wang <xiyou.wangcong@...il.com>,
	孔建军 <kongjianjun@...il.com>, pavel@....cz,
	Paul.Clements@...eleye.com
Subject: [RFC]nbd-client connect error

Hi all,
When i use ndb-server and nbd-client tools, something wrong(maybe a
bug) happens to like following.

Server: (IP: 192.168.1.103)
# uname -a
Linux wangzhe-laptop 2.6.32-33-generic #68-Ubuntu SMP Fri Jun 17
16:25:19 UTC 2011 i686 GNU/Linux

# cat /usr/etc/nbd-server/config
[generic]
[export]
exportname = /root/1.c
port = 2001

# nbd-server

Client: (IP: 192.168.1.30)

# uname -a
Linux localhost.localdomain 2.6.18-238.12.1.el5 #1 SMP Tue May 31
13:23:01 EDT 2011 i686 i686 i386 GNU/Linux

# nbd-client 192.168.1.103 2001 /dev/nbd0
Negotiation: ..size = 0MB
Error: Ioctl/1.1a failed: Inappropriate ioctl for device

Exiting.

# nbd-client 192.168.1.103 2001 /dev/sda1
Negotiation: ..size = 0MB
Error: Ioctl/1.1a failed: Invalid argument

Exiting.


I suspect the client machine's kernel version is too low to run the
command nbd-client.
Maybe the same problem with server machine. Could anyone give me some
suggestions?


Thanks in advance
Harry Wei
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