* Zhang Chen (zhangchen.f...@cn.fujitsu.com) wrote: > From: zhangchen <zhangchen.f...@cn.fujitsu.com> > > Hi,all > > This patch add an colo-proxy object, COLO-Proxy is a part of COLO, > based on qemu netfilter and it's a plugin for qemu netfilter. the function > keep Secondary VM connect normal to Primary VM and compare packets > sent by PVM to sent by SVM.if the packet difference,notify COLO do > checkpoint and send all primary packet has queued. > > You can also get the series from: > > https://github.com/zhangckid/qemu/tree/colo-v2.2-periodic-mode-with-colo-proxyV2
Are you sure that tag is correct? The series of commits doesn't seem to match up with the set of commits posted. Dave > > Usage: > > primary: > -netdev tap,id=bn0 -device e1000,netdev=bn0 > -object colo-proxy,id=f0,netdev=bn0,queue=all,mode=primary,addr=host:port > > secondary: > -netdev tap,id=bn0 -device e1000,netdev=bn0 > -object colo-proxy,id=f0,netdev=bn0,queue=all,mode=secondary,addr=host:port > > NOTE: > queue must set "all". See enum NetFilterDirection for detail. > colo-proxy need queue all packets > colo-proxy V2 just can compare ip packet > > > ## Background > > COLO FT/HA (COarse-grain LOck-stepping Virtual Machines for Non-stop Service) > project is a high availability solution. Both Primary VM (PVM) and Secondary > VM > (SVM) run in parallel. They receive the same request from client, and generate > responses in parallel too. If the response packets from PVM and SVM are > identical, they are released immediately. Otherwise, a VM checkpoint (on > demand)is conducted. > > Paper: > http://www.socc2013.org/home/program/a3-dong.pdf?attredirects=0 > > COLO on Xen: > http://wiki.xen.org/wiki/COLO_-_Coarse_Grain_Lock_Stepping > > COLO on Qemu/KVM: > http://wiki.qemu.org/Features/COLO > > By the needs of capturing response packets from PVM and SVM and finding out > whether they are identical, we introduce a new module to qemu networking > called colo-proxy. > > V2: > rebase colo-proxy with qemu-colo-v2.2-periodic-mode > fix dave's comments > fix wency's comments > fix zhanghailiang's comments > > v1: > initial patch. > > > > zhangchen (10): > Init colo-proxy object based on netfilter > Jhash: add linux kernel jhashtable in qemu > Colo-proxy: add colo-proxy framework > Colo-proxy: add data structure and jhash func > net/colo-proxy: Add colo interface to use proxy > net/colo-proxy: add socket used by forward func > net/colo-proxy: Add packet enqueue & handle func > net/colo-proxy: Handle packet and connection > net/colo-proxy: Compare pri pkt to sec pkt > net/colo-proxy: Colo-proxy do checkpoint and clear > > include/qemu/jhash.h | 61 ++++ > net/Makefile.objs | 1 + > net/colo-proxy.c | 939 > +++++++++++++++++++++++++++++++++++++++++++++++++++ > net/colo-proxy.h | 24 ++ > qemu-options.hx | 6 + > trace-events | 8 + > vl.c | 3 +- > 7 files changed, 1041 insertions(+), 1 deletion(-) > create mode 100644 include/qemu/jhash.h > create mode 100644 net/colo-proxy.c > create mode 100644 net/colo-proxy.h > > -- > 1.9.1 > > > -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
