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Bug 1369719

Summary: data lost when transfer from guest to host with virtio serial
Product: Red Hat Enterprise Linux 7 Reporter: Yiqian Wei <yiwei>
Component: qemu-kvm-rhevAssignee: Hai Huang <hhuang>
Status: CLOSED NOTABUG QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.3CC: chayang, hhuang, juzhang, knoel, mdeng, virt-maint, xfu, yiwei
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2016-08-26 01:39:17 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Yiqian Wei 2016-08-24 08:37:55 UTC 
Description of problem:


Version-Release number of selected component (if applicable):
kernel-3.10.0-492.el7.x86_64
qemu-kvm-rhev-2.6.0-20.el7.x86_64
seabios-1.9.1-4.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1.Start guest with 1 virtio-serial-pci and 2 virtio-serial-port.CLI:
/usr/libexec/qemu-kvm  \
-M pc-i440fx-rhel7.3.0 \
-cpu SandyBridge \
-vga qxl \
-smp 4 \
-m 4G \
-name rhel7.3 \
-uuid 990ea161-6b67-47b2-b803-19fb01d30d13 \
-monitor stdio \
-boot menu=on \
-spice port=5930,disable-ticketing,disable-copy-paste \
-qmp tcp:0:4444,server,nowait \
-drive file=/root/chardev.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none,werror=stop,rerror=stop \
-device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 \
-device virtio-net-pci,netdev=hostnet0,id=net0,mac=9a:6a:6b:6c:6d:61,bus=pci.0,addr=0x5,bootindex=2 \
-netdev tap,id=hostnet0,vhost=on,script=/etc/qemu-ifup \
-device virtio-balloon-pci,id=balloon0 \
-usbdevice tablet \
-device virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=0x9 \
-chardev socket,id=channel0,path=/tmp/serial-socket1,server,nowait \
-device virtserialport,chardev=channel0,name=org.linux-kvm.port.1,bus=virtio-serial0.0,id=port1 \
-chardev socket,id=channel1,path=/tmp/serial-socket2,server,nowait \
-device virtserialport,chardev=channel1,name=org.linux-kvm.port.2,bus=virtio-serial0.0,id=port2 \

2.Transferring data from guest to host via port1
(1)dd a big file in guest: 
   #dd if=/dev/zero of=guest-file bs=1M count=500
(2)Host: 
   # nc -U /tmp/serial-socket1 > received-file
(3)Guest: 
   #echo guest-file > /dev/vport3p1


Actual results:
# md5sum received-file 
3ecbb80a7bf68f5440d0078428cbb2c6  received-file

# md5sum guest-file 
d8b61b2c0025919d5321461045c8226f  guest-file

Expected results:
guest-file and received-file md5sum matches.


Additional info:

Transferring data from host to guest ------ md5sum matches
Comment 2 Yiqian Wei 2016-08-25 10:29:05 UTC 
I retest,md5sum matches.

  1.Start guest with 1 virtio-serial-pci and 2 virtio-serial-port.CLI:
/usr/libexec/qemu-kvm  \
-M pc-i440fx-rhel7.3.0 \
-cpu SandyBridge \
-vga qxl \
-smp 4 \
-m 4G \
-name rhel7.3 \
-uuid 990ea161-6b67-47b2-b803-19fb01d30d13 \
-monitor stdio \
-boot menu=on \
-spice port=5930,disable-ticketing,disable-copy-paste \
-qmp tcp:0:4444,server,nowait \
-drive file=/root/chardev.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none,werror=stop,rerror=stop \
-device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 \
-device virtio-net-pci,netdev=hostnet0,id=net0,mac=9a:6a:6b:6c:6d:61,bus=pci.0,addr=0x5,bootindex=2 \
-netdev tap,id=hostnet0,vhost=on,script=/etc/qemu-ifup \
-device virtio-balloon-pci,id=balloon0 \
-usbdevice tablet \
-device virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=0x9 \
-chardev socket,id=channel0,path=/tmp/serial-socket1,server,nowait \
-device virtserialport,chardev=channel0,name=org.linux-kvm.port.1,bus=virtio-serial0.0,id=port1 \
-chardev socket,id=channel1,path=/tmp/serial-socket2,server,nowait \
-device virtserialport,chardev=channel1,name=org.linux-kvm.port.2,bus=virtio-serial0.0,id=port2 \

2.Transferring data from guest to host via port1
(1)dd a big file in guest: 
   #dd if=/dev/zero of=guest-file bs=1M count=500
(2)Host: 
   # nc -U /tmp/serial-socket1 > received-file
(3)Guest:
   #cat guest-file > /dev/vport3p1
3.check md5sum
  Guest:
     # md5sum guest-file 
      d8b61b2c0025919d5321461045c8226f  guest-file
  Host:
    # md5sum received-file 
     d8b61b2c0025919d5321461045c8226f  received-file


I'm sorry,As QE misunderstant it.The original issue does not exist so close it,thanks.Any issues please let me know