Re: [edk2-devel] HTTP boot failed on timeout

["Laszlo Ersek" <lersek@redhat.com>]

On 02/17/20 09:17, doron.bleiberg@ecitele.com wrote:
> Hi Community,
> 
> I've also opened same topic at general discussion group, but after digging more into this issue I think the relevant group is here where all the technical stuff happens.
> A short introduction to my problem:
> I'm trying to boot QEMU VM using HTTP boot.
> I've modified Conf/target.txt as follows:
> ACTIVE_PLATFORM       = OvmfPkg/OvmfPkgX64.dsc
> TARGET_ARCH           = X64
> TOOL_CHAIN_TAG        = GCC48
> TARGET                = RELEASE
> 
> and OvmfPkg/OvmfPkgX64.dsc as follows:
> DEFINE NETWORK_HTTP_BOOT_ENABLE     = TRUE
> DEFINE SECURE_BOOT_ENABLE      = TRUE
> BUILD_TARGETS                  = RELEASE
> 
> and compiled compiled OvmfPkg/OvmfPkgX64.dsc
> 
> I'm loading the OVMF.fd to QEMU VM in this way:
> /usr/bin/qemu-system-x86_64 -name UEFI-HTTP-VM
> -m 8192M -smp cpus=1
> -enable-kvm -machine smm=off
> -boot order=c *-bios /opt/gns3/images/QEMU/Ovmf.fd*
> -drive file=/opt/gns3/projects/1a83274a-c57f-4337-8a0d-1e68a9312e9a/project-files/qemu/d8f37f0b-2b63-455f-b536-b309b9020e36/hda_disk.qcow2,if=ide,index=0,media=disk
> -uuid d8f37f0b-2b63-455f-b536-b309b9020e36
> -vnc 0.0.0.0:3
> -monitor tcp:127.0.0.1:33919,server,nowait
> -net none -device virtio-net-pci,mac=0c:2e:9a:0e:36:00,netdev=gns3-0 -netdev socket,id=gns3-0,udp=127.0.0.1:10017,localaddr=127.0.0.1:10016
> -nographic
> 
> The VM starts and boots, the HTTP boot is kicking in and the download is starting. However, after few seconds the download is stopped and the boot terminates with 'Error: Server response timeout'.
> The process is repeatable and always terminates at the same point (42% upload completed in my case).
> 
> I've drilled down the code and located the 'offending' code here:
> file: NetworkPkg/HttpBootDxe/HttpBootSupport.c
> line#: 1012
> Offending Code: while (!HttpIo->IsRxDone && ((HttpIo->TimeoutEvent == NULL) || EFI_ERROR (gBS->CheckEvent (HttpIo->TimeoutEvent))))
> Error Handler at line #1022: if (!HttpIo-> IsRxDone )
> 
> What I did i order to investigate:
> I've also tried to add HTTP header: "Connection": "Keep-Alive" hoping it will result the HTTP server keeping sessions open.
> Used Wireshark to capture and analyze the packets during download - I could not spot anything unusual. Eventually the packed transfer just stops
> Raised HTTP server debug level - could not find anything valuable in the logs. As far as I can tell from the logs, the HTTP server works correctly and it seems the problem is in the client side (UEFI)
> I'm downloading large file, so I've checked I have enough RAM to hold the image - seems OK. No complains regarding buffer size
> 
> Few inputs:
> My HTTP server version: Apache httpd/2.4.6 (CentOS)
> File size is I'm trying to download and boot: ~420MB
> 
> Error observed in the UEFI log when download terminates:
> Error: Server response timeout.
> BdsDxe: failed to load Boot0005 "UEFI HTTPv4 (MAC:0C2E9A0E3600)" from PciRoot(0x0)/Pci(0x3,0x0)/MAC(0C2E9A0E3600,0x1)/IPv4(0.0.0.0,0x0,DHCP,0.0.0.0,0.0.0.0,0.0.0.0)/Uri(): Not Found
> 
> For me it seems like a potential problem on the UEFI side, maybe related to Poll or other networking stuff.
> 
> I'll appreciate any help.

As I mentioned on edk2-discuss, I'd suggest two tweaks (independently of
each other):

* try the builting virtio-net driver rather than the iPXE one. For that,
use:

  -device virtio-net-pci,[other properties],romfile=""

that is, add a 'romfile=""' property

* Try using a different -netdev backend than a UDP socket.

Thanks
Laszlo