qemu/docs/colo-proxy.txt

18 The filter-redirector, filter-mirror, colo-compare
19 and filter-rewriter compose the COLO-proxy.
44 …  |      |        out       |    |  |  |                     |        |  filter execute order     …
49 | | |  filter  |  |  filter  | |  filter  +------>  colo   <------+ +-------->  filter   +--> adjus…
56 | |      |   filter execute order     |     |                  |  |    |                           …
64 …                                        |                          NOTE: filter direction is rx/tx…
73 Tap --> Mirror Client Filter
80 Mirror Server Filter --> TCP Rewriter
89 Guest --> Redirect Server Filter
90 Redirect server filter receive primary guest packet
91 but do nothing, just pass to next filter.
93 Redirect Server Filter --> COLO-Compare
100 COLO-Compare --> Another Redirector Filter
104 Redirector Filter --> Tap
109 Guest --> TCP Rewriter Filter
112 redirect client filter. Otherwise directly send to
113 redirect client filter.
115 Redirect Client Filter --> Redirect Server Filter
120 Filter-mirror is a netfilter plugin.
124 Filter-redirector is a netfilter plugin.
126 Redirector can redirect filter's net packet to outdev,
127 and redirect indev's packet to filter.
129                     filter
143                 filter
153 Filter-rewriter will rewrite some of secondary packet to make
174 -object filter-mirror,id=m0,netdev=hn0,queue=tx,outdev=mirror0
175 -object filter-redirector,netdev=hn0,id=redire0,queue=rx,indev=compare_out
176 -object filter-redirector,netdev=hn0,id=redire1,queue=rx,outdev=compare0
184 -object filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0
185 -object filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1
186 -object filter-rewriter,id=f3,netdev=hn0,queue=all
199 -object filter-mirror,id=m0,netdev=hn0,queue=tx,outdev=mirror0,vnet_hdr_support
200 -object filter-redirector,netdev=hn0,id=redire0,queue=rx,indev=compare_out,vnet_hdr_support
201 -object filter-redirector,netdev=hn0,id=redire1,queue=rx,outdev=compare0,vnet_hdr_support
209 -object filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0,vnet_hdr_support
210 -object filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1,vnet_hdr_support
211 -object filter-rewriter,id=f3,netdev=hn0,queue=all,vnet_hdr_support
217   c.Filter-rewriter only rewrite tcp packet.