I met a problem when using nvme-cli to send an append command to ZNS SSD.

[Konna619]

I run a guest machine (u20s) with a zns ssd using default script : run-zns.sh. Then I compile and install nvme-cli(2.1.2) tool on the guest.
When I run command echo "hello world" | sudo nvme zns zone-append /dev/nvme0n1 -z 512, it returns Success appended data to LBA 0.But then I run command 'sudo nvme read /dev/nvme0n1 -z 512', it only returns read: Success without any other contents.
In addition, I simulate another zns ssd with qemu's configuration. And after finishing the above operations, it returns as follows:

hello world
read: Success

Is there any problem with femu's zns ssd? Or maybe I just missed something？

[Konna619]

After debug, I find when running command nvme zns zone-append, NvmeRequest->QEMUSGList->AddressSpace which femu received from guest has not correct contents.
But when I run command nvme write /dev/nvme0n1 -z 512, NvmeRequest->QEMUSGList->AddressSpace does have correct contents.

[huaicheng]

Thanks for reporting the bug. Will look into this.