[PATCH 0/6] hw/block/nvme: support namespace attachment

[Minwoo Im]

Hello,

This series supports namespace attachment: attach and detach.  It means
that this series also introduced a scheme for allocated namespace which
is detached, but allocated in a NVMe subsystem.  Given that now we have
nvme-subsys device to specify a NVMe subsystem, it can manage detached
namespaces from controllers in the subsystem itself.

Tested:

  -device nvme-subsys,id=subsys0 \                                              
      
  -device nvme,serial=foo,id=nvme0,subsys=subsys0 \                             
      
  -device nvme-ns,id=ns1,drive=drv0,nsid=1,subsys=subsys0,zoned=false \         
     
  -device nvme-ns,id=ns2,drive=drv1,nsid=2,subsys=subsys0,zoned=true \          
     
  -device 
nvme-ns,id=ns3,drive=drv2,nsid=3,subsys=subsys0,detached=true,zoned=false \
  -device 
nvme-ns,id=ns4,drive=drv3,nsid=4,subsys=subsys0,detached=true,zoned=true \ 

  root@vm:~# nvme list
  Node                  SN                   Model                              
      Namespace Usage                      Format           FW Rev
  --------------------- -------------------- 
---------------------------------------- --------- -------------------------- 
---------------- --------
  /dev/nvme0n1          foo                  QEMU NVMe Ctrl                     
      1         268.44  MB / 268.44  MB    512   B +  0 B   1.0
  /dev/nvme0n2          foo                  QEMU NVMe Ctrl                     
      2         268.44  MB / 268.44  MB    512   B +  0 B   1.0

  root@vm:~# nvme attach-ns /dev/nvme0 --namespace-id=3 --controllers=0
  attach-ns: Success, nsid:3
  root@vm:~# nvme attach-ns /dev/nvme0 --namespace-id=4 --controllers=0
  attach-ns: Success, nsid:4
  root@vm:~# echo 1 > /sys/class/nvme/nvme0/rescan_controller

  root@vm:~# nvme list
  Node                  SN                   Model                              
      Namespace Usage                      Format           FW Rev  
  --------------------- -------------------- 
---------------------------------------- --------- -------------------------- 
---------------- --------
  /dev/nvme0n1          foo                  QEMU NVMe Ctrl                     
      1         268.44  MB / 268.44  MB    512   B +  0 B   1.0     
  /dev/nvme0n2          foo                  QEMU NVMe Ctrl                     
      2         268.44  MB / 268.44  MB    512   B +  0 B   1.0     
  /dev/nvme0n3          foo                  QEMU NVMe Ctrl                     
      3         268.44  MB / 268.44  MB    512   B +  0 B   1.0     
  /dev/nvme0n4          foo                  QEMU NVMe Ctrl                     
      4         268.44  MB / 268.44  MB    512   B +  0 B   1.0     

  root@vm:~# nvme detach-ns /dev/nvme0 --namespace-id=3 --controllers=0
  detach-ns: Success, nsid:3
  root@vm:~# nvme detach-ns /dev/nvme0 --namespace-id=4 --controllers=0
  detach-ns: Success, nsid:4
  root@vm:~# echo 1 > /sys/class/nvme/nvme0/rescan_controller

  root@vm:~# nvme list
  Node                  SN                   Model                              
      Namespace Usage                      Format           FW Rev  
  --------------------- -------------------- 
---------------------------------------- --------- -------------------------- 
---------------- --------
  /dev/nvme0n1          foo                  QEMU NVMe Ctrl                     
      1         268.44  MB / 268.44  MB    512   B +  0 B   1.0     
  /dev/nvme0n2          foo                  QEMU NVMe Ctrl                     
      2         268.44  MB / 268.44  MB    512   B +  0 B   1.0     

Thanks,

Minwoo Im (6):
  hw/block/nvme: support namespace detach
  hw/block/nvme: fix namespaces array to 1-based
  hw/block/nvme: fix allocated namespace list to 256
  hw/block/nvme: support allocated namespace type
  hw/block/nvme: refactor nvme_select_ns_iocs
  hw/block/nvme: support namespace attachment command

 hw/block/nvme-ns.c     |   1 +
 hw/block/nvme-ns.h     |   1 +
 hw/block/nvme-subsys.h |  28 +++++-
 hw/block/nvme.c        | 199 ++++++++++++++++++++++++++++++++++-------
 hw/block/nvme.h        |  33 +++++++
 hw/block/trace-events  |   2 +
 include/block/nvme.h   |   5 ++
 7 files changed, 234 insertions(+), 35 deletions(-)

-- 
2.17.1