riscv/qemu - qemu - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Zhang Chen	4b39bdced5	net/filter-rewriter.c: Make filter-rewriter support vnet_hdr_len We add the vnet_hdr_support option for filter-rewriter, default is disabled. If you use virtio-net-pci or other driver needs vnet_hdr, please enable it. You can use it for example: -object filter-rewriter,id=rew0,netdev=hn0,queue=all,vnet_hdr_support We get the vnet_hdr_len from NetClientState that make us parse net packet correctly. Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	9 years ago
Zhang Chen	ada1a33f9a	net/colo.c: Make vnet_hdr_len as packet property We can use this property flush and send packet with vnet_hdr_len. Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	9 years ago
zhanghailiang	db0a762e4b	filter-rewriter: skip net_checksum_calculate() while offset = 0 While the offset of packets's sequence for primary side and secondary side is zero, it is unnecessary to call net_checksum_calculate() to recalculate the checksume value of packets. Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	10 years ago
Zhang Chen	2061c14c9b	colo-proxy: fix memory leak Fix memory leak in colo-compare.c and filter-rewriter.c Report by Coverity and add some comments. Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> Reviewed-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	10 years ago
Zhang Chen	30656b097e	filter-rewriter: rewrite tcp packet to keep secondary connection We will rewrite tcp packet secondary received and sent. When colo guest is a tcp server. Firstly, client start a tcp handshake. the packet's seq=client_seq, ack=0,flag=SYN. COLO primary guest get this pkt and mirror(filter-mirror) to secondary guest, secondary get it use filter-redirector. Then,primary guest response pkt (seq=primary_seq,ack=client_seq+1,flag=ACK\|SYN). secondary guest response pkt (seq=secondary_seq,ack=client_seq+1,flag=ACK\|SYN). In here,we use filter-rewriter save the secondary_seq to it's tcp connection. Finally handshake,client send pkt (seq=client_seq+1,ack=primary_seq+1,flag=ACK). Here,filter-rewriter can get primary_seq, and rewrite ack from primary_seq+1 to secondary_seq+1, recalculate checksum. So the secondary tcp connection kept good. When we send/recv packet. client send pkt(seq=client_seq+1+data_len,ack=primary_seq+1,flag=ACK\|PSH). filter-rewriter rewrite ack and send to secondary guest. primary guest response pkt (seq=primary_seq+1,ack=client_seq+1+data_len,flag=ACK) secondary guest response pkt (seq=secondary_seq+1,ack=client_seq+1+data_len,flag=ACK) we rewrite secondary guest seq from secondary_seq+1 to primary_seq+1. So tcp connection kept good. In code We use offset( = secondary_seq - primary_seq ) to rewrite seq or ack. handle_primary_tcp_pkt: tcp_pkt->th_ack += offset; handle_secondary_tcp_pkt: tcp_pkt->th_seq -= offset; Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	10 years ago
Zhang Chen	afe4612409	filter-rewriter: track connection and parse packet We use net/colo.h to track connection and parse packet Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	10 years ago
Zhang Chen	e6eee8ab51	filter-rewriter: introduce filter-rewriter initialization Filter-rewriter is a part of COLO project. It will rewrite some of secondary packet to make secondary guest's tcp connection established successfully. In this module we will rewrite tcp packet's ack to the secondary from primary,and rewrite tcp packet's seq to the primary from secondary. usage: colo secondary: -object filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0 -object filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1 -object filter-rewriter,id=rew0,netdev=hn0,queue=all Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	10 years ago