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Date:      Thu, 19 Mar 2020 12:09:37 +0900
From:      Wanpeng Qian <wanpengqian@gmail.com>
To:        John-Mark Gurney <jmg@funkthat.com>
Cc:        FreeBSD virtualization <freebsd-virtualization@freebsd.org>
Subject:   Re: bhyve: passthrough SMART info from host nvme controller
Message-ID:  <CANBJ%2BxTVV3gOv7%2B8Qq9Aq1PaHEo=W%2BNMuqMwZCD7uvU80NFLmA@mail.gmail.com>
In-Reply-To: <20200318175901.GI4213@funkthat.com>
References:  <CANBJ%2BxRdvTUHV0PQeBK2y2bCWDi5idqrD-AsHCT02fWkBLzeQQ@mail.gmail.com> <20200318175901.GI4213@funkthat.com>

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> Can't you do what something like pci_passthru.c does in passthru_init,
> and open /dev/nvme0 in pci_nvme_init?

Yes, you are correct. but that will make /dev/nvme0 keep open all the time.
I just thinking when guest fire a logpage command, open the /dev/nvme0
and get the SMART info. then close /dev/nvme0.

On Thu, Mar 19, 2020 at 2:59 AM John-Mark Gurney <jmg@funkthat.com> wrote:
>
> Wanpeng Qian wrote this message on Wed, Mar 18, 2020 at 13:05 +0900:
> > But currently bhyve has Capsicum capability, I cannot
> > open /dev/nvme0 within pci_nvme.c without extra code.
> > (currently I just disable the Capsicum capability)
> >
> > any feedback?
>
> Can't you do what something like pci_passthru.c does in passthru_init,
> and open /dev/nvme0 in pci_nvme_init?
>
> Or am I missing something?
>
> --
>   John-Mark Gurney                              Voice: +1 415 225 5579
>
>      "All that I will do, has been done, All that I have, has not."



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