From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46009) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f7xWC-0007dr-9R for qemu-devel@nongnu.org; Mon, 16 Apr 2018 02:21:37 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f7xW8-0002I0-7w for qemu-devel@nongnu.org; Mon, 16 Apr 2018 02:21:36 -0400 Received: from mga02.intel.com ([134.134.136.20]:8173) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1f7xW7-0002E0-Sq for qemu-devel@nongnu.org; Mon, 16 Apr 2018 02:21:32 -0400 References: <22f7f184-c295-4e18-c186-3fd9fdcce213@linux.intel.com> <20180323160252.GA27131@stefanha-x1.localdomain> <1e0e5f9b-18b4-7f0f-dbd1-696ef1f7039c@linux.intel.com> <20180404094537.GI4467@stefanha-x1.localdomain> From: "Liu, Jing2" Message-ID: <893131b0-cd13-3c41-5a01-973a0302792c@linux.intel.com> Date: Mon, 16 Apr 2018 14:21:26 +0800 MIME-Version: 1.0 In-Reply-To: <20180404094537.GI4467@stefanha-x1.localdomain> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [Consult] nfs-vsocks support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Stefan Hajnoczi Cc: yang.zhong@intel.com, qemu-devel , Stefan Hajnoczi On 4/4/2018 5:45 PM, Stefan Hajnoczi wrote: > On Wed, Mar 28, 2018 at 07:25:21PM +0800, Liu, Jing2 wrote: >> On 3/26/2018 6:12 PM, Liu, Jing2 wrote: >>> Hi Stefan, >>> >>> Thank you very much for the response! It truly gave me much help. >>> >>> On 3/24/2018 12:02 AM, Stefan Hajnoczi wrote: >> [...] >>>>> Could you give me some help and thanks in advance! >>>> >>>> Here is a script that launches nfsd and runs a guest: >>>> https://github.com/stefanha/linux/commit/38cbc15661a6dd44b69c4f318091f2047d707035#diff-05f3fe8941076453942a8c059b409009 >>>> >> >> Using the script, I met some problems making the >> initramfs.gz. It confused me a lot... I don't have busybox under >> /usr/bin or /usr/sbin. Where to get it? > > It may be easier to use a full guest disk image instead of the disk > image generation in my go.sh script. The initramfs is very specific to > the development machine I was using at the time. The main thing to look > at the in the go.sh script is how the NFS services are launched on the > host. > > Busybox is a package that is available on most Linux distributions. I realized the rhel-7.x doesn't has busybox anymore. And yes, I used some other image to continue. > Before you spend more time on this, NFS over AF_VSOCK is only suitable > for developers right now. It is not ready for production and I am not > supporting it for end users. So if you want to hack on NFS, please go > ahead, but otherwise it's probably not what you want. > Yes, so far we didn't plan for production. And thank you very much for your kind response. Jing > Stefan > >> (host)$./go.sh nfs_tcp >> >> File /usr/sbin/busybox could not be opened for reading >> line 55 >> File /lib64/libtirpc.so.3 could not be opened for reading >> line 306 >> File nc-vsock could not be opened for reading >> line 321 >> File ../netperf-2.7.0/src/netserver could not be opened for reading >> line 325 >> >> It results in guest kernel_panic when gdb launches the guest: >> >> [ 0.425738] Failed to execute /init (error -2) >> [ 0.426074] Kernel panic - not syncing: No working init found. Try >> passing . >> [ 0.427077] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.13.0+ #3 >> [ 0.427507] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS >> rel-4 >> [ 0.428354] Call Trace: >> [ 0.428538] dump_stack+0x63/0x89 >> [ 0.428774] ? rest_init+0x60/0xc0 >> [ 0.429017] panic+0xeb/0x245 >> [ 0.429225] ? putname+0x53/0x60 >> [ 0.429455] ? rest_init+0xc0/0xc0 >> [ 0.429722] kernel_init+0xf1/0x104 >> [ 0.430017] ret_from_fork+0x25/0x30 >> >> Looking forward to the kind reply. >> BTW, for the following questions that I sent two days ago, I have some >> ideas in mind and it could be ignored now. >> >> Jing >> >>> I have updated both host and guest kernel with vsock-nfsd repo and >>> installed nfs-utils in both host and guest successfully. >>> >>> There're two different manuals in >>> https://www.spinics.net/lists/linux-nfs/msg64563.html(Quickstart 3~7) >>> and nfs-utils (README step 3 DAEMON STARTUP ORDER). >>> Which one should be the best usage? >>> >>> For the first quickstart manual step 7-Mount the export from the guest, >>> two questions as follows. >>> 1. why hypervisor's CID is 2? I didn't notice when it is specified? >>> 2. Though I did step 3~7 successfully, I can't see the synchronistical >>> changing on host folder /export/ and guest /mnt? So how to test the >>> communcation between host and guest on the folder? >>> >>> Thanks again! >>> >>> Jing >> [...] >>>> >>>> Stefan >>>> >>> >>