Date: Thu, 15 Dec 2016 17:34:32 +0000 From: Roger Pau =?iso-8859-1?Q?Monn=E9?= <roger.pau@citrix.com> To: Nathan Friess <nathan.friess@gmail.com>, <freebsd-xen@freebsd.org> Subject: Re: 11-RELEASE acting as vbd backend Message-ID: <20161215173432.3qjzilzot7lnddhm@dhcp-3-221.uk.xensource.com> In-Reply-To: <20161212103257.tg46q2s3j5riixp5@dhcp-3-221.uk.xensource.com> References: <247e5b6c-2713-27cf-f8fa-61e55c9e2025@gmail.com> <20161206100414.pi7ep2zbkduhuol7@dhcp-3-221.uk.xensource.com> <39e43ae4-6388-c698-c3c2-43cbc1f7b93c@gmail.com> <20161209144630.dfga5mozh72veo4g@dhcp-3-221.uk.xensource.com> <584ADC91.8050909@gmail.com> <20161212103257.tg46q2s3j5riixp5@dhcp-3-221.uk.xensource.com>
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On Mon, Dec 12, 2016 at 10:32:57AM +0000, Roger Pau Monné wrote: > On Fri, Dec 09, 2016 at 09:32:17AM -0700, Nathan Friess wrote: > > On 16-12-09 07:46 AM, Roger Pau Monné wrote: > > > Hello, > > > > > > Sorry for the delay, there was a huge can of worms behind this. I have a > > > solution, but it requires patching both Xen and the FreeBSD kernel. Please bear > > > with me, I will send those patches once ready. > > > > It sounds like you might know this already, but I did some more digging and > > here is what I can see so far... > > > > The important command is "xl devd". Running that under truss, it is trying > > to open /dev/xen/xenbus and that was the cause of the No such file error. > > It looks like the 10.3 tools used to open /dev/xen/xenstore instead. > > > > I can get around this by exporting XENSTORED_PATH="/dev/xen/xenstore". > > > > Now xl devd is stuck at: > > > > libxl: error: libxl_event.c:639:libxl__ev_xswatch_register: create watch for > > path /local/domain/7/backend: Invalid argument > > > > So it seems like an API issue with asking the kernel or dom0 to set a watch > > for new backend devices. > > Yes, the current xenstore user-space device on FreeBSD is missing the ability to > register xenstore watches. As said, I will hopefully be able to send the patches > soon. OK, I finally have this ready, you will need the following patches for FreeBSD, which I pushed to my git repo on top of current HEAD: git://xenbits.xen.org/people/royger/freebsd.git add_watches_xenstore You can either compile a kernel from this branch or pickup the 4 top patches and apply them to your local tree (I don't think you are going to find any conflicts even if the tree is stable/11 or 11.0-RELEASE). You should also update your xen-tools package to the latest version, I've just updated it to contain the xenstore device path fix: https://svnweb.freebsd.org/ports?view=revision&revision=428628 After this is done, it should just be a matter of launching xendriverdomain at system boot and it should work out of the box. Let me know how this goes. Thanks, Roger.
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