Hi,
I'm a new users of xen and have two questions.
The first one is that I'm looking for methods about inter-domain
communication for xen. I know besides network, VMs on the same physical machine
can exchange information by event channel and grant table. But are these two
ways working in kernel mode as part of drivers, or can I directly use them just
like network socket in user mode? I've tried to google it but only got
something I can't fully understand.
The second questions is I want to do some extra jobs (like check tcp/ip
header and change some bits) to packages in the virtual network of xen. As all
domUs' packages are passing the back driver of dom0, I want to put this
extra action to network back driver of dom0. But I'm not sure which part of
the source code has the function of receiving packages from front driver. I
think it may be function xen_netbk_tx_action.
I'll be very appreciated if someone knows the answer. Thanks!
summerxyt
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Xen-users mailing list
Xen-users@lists.xen.org
http://lists.xensource.com/xen-users
Hi,
I'm a new users of xen and have two questions.
The first one is that I'm looking for methods about inter-domain
communication for xen. I know besides network, VMs on the same physical machine
can exchange information by event channel and grant table. But are these two
ways working in kernel mode as part of drivers, or can I directly use them just
like network socket in user mode? I've tried to google it but only got
something I can't fully understand.
The second questions is I want to do some extra jobs (like check tcp/ip
header and change some bits) to packages in the virtual network of xen. As all
domUs' packages are passing the back driver of dom0, I want to put this
extra action to network back driver of dom0. But I'm not sure which part of
the source code has the function of receiving packages from front driver. I
think it may be function xen_netbk_tx_action.
I'll be very appreciated if someone knows the answer. Thanks!
summerxyt
_______________________________________________
Xen-users mailing list
Xen-users@lists.xen.org
http://lists.xensource.com/xen-users
George Shuklin
2012-Feb-21 08:09 UTC
Re: does anyone know how to communicate between domUs on xen?
AFAIK there is no product-ready solution for ''socket like'' communication between domains. For user-level and low-insensitivity exchange you can use xenstore (f.e. squeezed and xapi use xenstore in ... kinda RPC-way), libxc supports subscription for key changes, so it can be relatively fast. For faster exchange only normal network exists. In my experiments two domains in on same host can show about 5-8Gb/s, which is not much lower causal lo connectivity within domain. AFAIK xen networks drivers are heavily optimized for case of ''same host'' connectivity and skip many cpu-consuming operations (like CRC calculation) during ''host-local'' communications. On 21.02.2012 09:19, summerxyt wrote:> Hi, > I''m a new users of xen and have two questions. > The first one is that I''m looking for methods about inter-domain > communication for xen. I know besides network, VMs on the same > physical machine can exchange information by event channel and grant > table. But are these two ways working in kernel mode as part of > drivers, or can I directly use them just like network socket in user > mode? I''ve tried to google it but only got something I can''t fully > understand. > The second questions is I want to do some extra jobs (like check > tcp/ip header and change some bits) to packages in the virtual network > of xen. As all domUs'' packages are passing the back driver of dom0, I > want to put this extra action to network back driver of dom0. But I''m > not sure which part of the source code has the function of receiving > packages from front driver. I think it may be function > xen_netbk_tx_action > <http://lxr.free-electrons.com/ident?i=xen_netbk_tx_action>. > I''ll be very appreciated if someone knows the answer. Thanks! > ------------------------------------------------------------------------ > summerxyt > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xen.org > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xensource.com/xen-users
Luciano Barreto
2012-Feb-21 10:58 UTC
Re: does anyone know how to communicate between domUs on xen?
http://aseemsethi.wordpress.com/article/learning-xenstore-29fizhrip655z-4/ I''ve been using XenStore for a TPM-Like project and it works fine for me. 2012/2/21 George Shuklin <george.shuklin@gmail.com>> AFAIK there is no product-ready solution for ''socket like'' communication > between domains. For user-level and low-insensitivity exchange you can use > xenstore (f.e. squeezed and xapi use xenstore in ... kinda RPC-way), libxc > supports subscription for key changes, so it can be relatively fast. > > For faster exchange only normal network exists. In my experiments two > domains in on same host can show about 5-8Gb/s, which is not much lower > causal lo connectivity within domain. AFAIK xen networks drivers are > heavily optimized for case of ''same host'' connectivity and skip many > cpu-consuming operations (like CRC calculation) during ''host-local'' > communications. > > On 21.02.2012 09:19, summerxyt wrote: > > Hi, > I''m a new users of xen and have two questions. > The first one is that I''m looking for methods about inter-domain > communication for xen. I know besides network, VMs on the same physical > machine can exchange information by event channel and grant table. But are > these two ways working in kernel mode as part of drivers, or can I directly > use them just like network socket in user mode? I''ve tried to google it > but only got something I can''t fully understand. > The second questions is I want to do some extra jobs (like check > tcp/ip header and change some bits) to packages in the virtual network of > xen. As all domUs'' packages are passing the back driver of dom0, I want to > put this extra action to network back driver of dom0. But I''m not sure > which part of the source code has the function of receiving packages from > front driver. I think it may be function xen_netbk_tx_action<http://lxr.free-electrons.com/ident?i=xen_netbk_tx_action> > . > I''ll be very appreciated if someone knows the answer. Thanks! > > ------------------------------ > summerxyt > > > _______________________________________________ > Xen-users mailing listXen-users@lists.xen.orghttp://lists.xensource.com/xen-users > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xen.org > http://lists.xensource.com/xen-users >-- Luciano Barreto _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xensource.com/xen-users