linux-kernel - Re: [PATCH 08/12] lightnvm: implement get log report chunk helpers

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Date:   Wed, 21 Mar 2018 20:49:45 +0000
From:   Javier Gonzalez <javier@...xlabs.com>
To:     Matias Bjørling <mb@...htnvm.io>
CC:     Keith Busch <keith.busch@...el.com>,
        Javier González <javier@...igon.com>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@...radead.org>,
        "Sagi Grimberg" <sagi@...mberg.me>
Subject: Re: [PATCH 08/12] lightnvm: implement get log report chunk helpers


> On 21 Mar 2018, at 20.27, Matias Bjørling <mb@...htnvm.io> wrote:
> 
>> On 03/21/2018 03:36 PM, Keith Busch wrote:
>> On Wed, Mar 21, 2018 at 03:06:05AM -0700, Matias Bjørling wrote:
>>>> outside of nvme core so that we can use it form lightnvm.
>>>> 
>>>> Signed-off-by: Javier González <javier@...xlabs.com>
>>>> ---
>>>>   drivers/lightnvm/core.c      | 11 +++++++
>>>>   drivers/nvme/host/core.c     |  6 ++--
>>>>   drivers/nvme/host/lightnvm.c | 74 ++++++++++++++++++++++++++++++++++++++++++++
>>>>   drivers/nvme/host/nvme.h     |  3 ++
>>>>   include/linux/lightnvm.h     | 24 ++++++++++++++
>>>>   5 files changed, 115 insertions(+), 3 deletions(-)
>>>> 
>>>> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
>>>> index 2e9e9f973a75..af642ce6ba69 100644
>>>> --- a/drivers/nvme/host/core.c
>>>> +++ b/drivers/nvme/host/core.c
>>>> @@ -2127,9 +2127,9 @@ static int nvme_init_subsystem(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id)
>>>>       return ret;
>>>>   }
>>>>   -static int nvme_get_log_ext(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
>>>> -                u8 log_page, void *log,
>>>> -                size_t size, size_t offset)
>>>> +int nvme_get_log_ext(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
>>>> +             u8 log_page, void *log,
>>>> +             size_t size, size_t offset)
>>>>   {
>>>>       struct nvme_command c = { };
>>>>       unsigned long dwlen = size / 4 - 1;
>>>> diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
>>>> index 08f0f6b5bc06..ffd64a83c8c3 100644
>>>> --- a/drivers/nvme/host/lightnvm.c
>>>> +++ b/drivers/nvme/host/lightnvm.c
>>>> @@ -35,6 +35,10 @@ enum nvme_nvm_admin_opcode {
>>>>       nvme_nvm_admin_set_bb_tbl    = 0xf1,
>>>>   };
>>>>   
>>> 
>>> <snip>
>>> 
>>>>   diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
>>>> index 1ca08f4993ba..505f797f8c6c 100644
>>>> --- a/drivers/nvme/host/nvme.h
>>>> +++ b/drivers/nvme/host/nvme.h
>>>> @@ -396,6 +396,9 @@ int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
>>>>   int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
>>>>   int nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl);
>>>>   +int nvme_get_log_ext(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
>>>> +             u8 log_page, void *log, size_t size, size_t offset);
>>>> +
>>>>   extern const struct attribute_group nvme_ns_id_attr_group;
>>>>   extern const struct block_device_operations nvme_ns_head_ops;
>>>>   
>>> 
>>> 
>>> Keith, Christoph, Sagi, Is it okay that these two changes that exposes
>>> the nvme_get_log_ext fn are carried through Jens' tree after the nvme
>>> tree for 4.17 has been pulled?
>> That's okay with me. Alteratively, if you want to split the generic nvme
>> part out, I can apply that immediately and the API will be in the first
>> nvme-4.17 pull request.
> 
> Will do. I've sent the patch in another mail. Thanks! :)

It’s fine with me.

Matias: do you take that part of the patch out directly on our tree?

Javier.