Re: [RFC PATCH V3 7/8] hw/block/nvme: add 'detached' param not to attach namespace

[Klaus Jensen]

On Jan 20 02:01, Minwoo Im wrote:
> Introduced 'detached' parameter to nvme-ns device.  If given, the
> namespace will not be attached to controller(s) in the subsystem.  If
> 'subsys' is not given with this option, it should be provided with 'bus'
> which is for private namespace.
> 
> This patch also introduced 'ctrls_bitmap' in NvmeNamespace instance to
> represent which controler id(cntlid) is attached to this namespace
> device.  A namespace can be attached to multiple controllers in a
> subsystem so that this bitmap maps those two relationships.
> 
> The ctrls_bitmap bitmap should not be accessed directly, but through the
> helpers introduced in this patch: nvme_ns_is_attached(),
> nvme_ns_attach(), nvme_ns_detach().
> 
> Note that this patch made identify namespace list data not hold
> non-attached namespace ID in nvme_identify_nslist.  Currently, this
> command handler is for CNS 0x2(Active) and 0x10(Allocated) both.  The
> next patch will introduce a handler for later on.
> 
> Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
> ---
>  hw/block/nvme-ns.c     |  9 +++++++++
>  hw/block/nvme-ns.h     |  6 ++++++
>  hw/block/nvme-subsys.c |  2 ++
>  hw/block/nvme.c        | 31 ++++++++++++++++++++++++++++++-
>  hw/block/nvme.h        | 15 +++++++++++++++
>  5 files changed, 62 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/block/nvme-ns.c b/hw/block/nvme-ns.c
> index 073f65e49cac..70d42c24065c 100644
> --- a/hw/block/nvme-ns.c
> +++ b/hw/block/nvme-ns.c
> @@ -17,6 +17,7 @@
>  #include "qemu/cutils.h"
>  #include "qemu/log.h"
>  #include "qemu/error-report.h"
> +#include "qemu/hbitmap.h"

Isn't the HBitmap slightly overkill? Can qemu/bitmap.h suffice?

>  #include "hw/block/block.h"
>  #include "hw/pci/pci.h"
>  #include "sysemu/sysemu.h"

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