Cannot write OCSSD2.0 of FEMU using SPDK about femu HOT 9 CLOSED

Thanks for reporting this. I will take a look later (need a while).

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Thanks for reporting this. I will take a look later (need a while).

Thank you

from femu.

The qemu I used is https://github.com/spdk/qemu/tree/spdk-5.0.0

from femu.

Thanks for reporting this. I will take a look later (need a while).

Installing, using and debugging FEMU can cause side effects including headache, nausea, agitation, and depression. If your research condition does not improve after using FEMU for a week, please talk to your advisor or us right away.

Haha,I think I have headache symptoms now.I don’t know where is the bug .

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SPDK use NVMe read/write (0x01, 0x02) Commands for OCSSD read and write,but FEMU OCSSD2.0 do not support NVMe read/write (0x01, 0x02) Commands.FEMU support Vector Chunk Write/Read( (0x91, 0x92)).You can modify SPDK's read and write interface or add NVMe read/write (0x01, 0x02) function to FEMU.

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With the above patch, the SPDK FTL "hello world" test runs fine on FEMU.

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With the above patch, the SPDK FTL "hello world" test runs fine on FEMU.

Thank you very much
Now the "hello world" test can run successfully.But I found another problem when I mounted SPDK FTL.FEMU does not support "Asynchronous Event Request command" (NVMe admin command opcode=0x0C) and "Log Page Identifier Chunk Notification"(lid=0xD0).
SPDK needs the support of these two admin commands to successfully mount user-mode FTL.

NVMe 1.3 specification.

OCSSD2.0 specification

Example of spdk mounting FTL
1.Run FEMU OCSSD mode:
./run-whitebox.sh

2.Build SPDK
git clone https://github.com/spdk/spdk -b v20.10
cd spdk
git submodule update --init
sudo scripts/pkgdep.sh
./configure
make

3.Mount FTL
sudo HUGEMEM=5120 scripts/setup.sh
sudo ./build/bin/nvmf_tgt

Then open another terminal window
scripts/rpc.py bdev_nvme_attach_controller -b nvme0 -a 00:05.0 -t pcie
scripts/rpc.py bdev_ocssd_create -c nvme0 -b nvme0n1 (Failed to run this)
scripts/rpc.py bdev_ftl_create -b ftl0 -d nvme0n1

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Thanks for testing it! Will take a look later.

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