linux-kernel - Re: [PATCH 2/2] lightnvm: add lun information to show debug interf.

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Date:	Fri, 20 Nov 2015 13:44:31 +0100
From:	Matias Bjørling <m@...rling.me>
To:	Javier Gonzalez <javier@...igon.com>, linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org
CC:	Javier Gonzalez <javier@...xlabs.com>
Subject: Re: [PATCH 2/2] lightnvm: add lun information to show debug interf.

On 11/20/2015 10:01 AM, Javier Gonzalez wrote:
> Add free block, used block, and bad block information to the show debug
> interface. This information is used to debug how targets track blocks.
>
> Also, change debug function name to make it more generic.
>
> Signed-off-by: Javier Gonzalez <javier@...xlabs.com>
> ---
>   drivers/lightnvm/core.c   |  2 +-
>   drivers/lightnvm/gennvm.c | 19 ++++++++++++++-----
>   include/linux/lightnvm.h  |  4 ++--
>   3 files changed, 17 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
> index 51e0008..e0072b5 100644
> --- a/drivers/lightnvm/core.c
> +++ b/drivers/lightnvm/core.c
> @@ -544,7 +544,7 @@ static int nvm_configure_show(const char *val)
>   	if (!dev->mt)
>   		return 0;
>
> -	dev->mt->free_blocks_print(dev);
> +	dev->mt->lun_info_print(dev);
>
>   	return 0;
>   }
> diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
> index 43c01e0..e20e74e 100644
> --- a/drivers/lightnvm/gennvm.c
> +++ b/drivers/lightnvm/gennvm.c
> @@ -464,15 +464,24 @@ static struct nvm_lun *gennvm_get_lun(struct nvm_dev *dev, int lunid)
>   	return &gn->luns[lunid].vlun;
>   }
>
> -static void gennvm_free_blocks_print(struct nvm_dev *dev)
> +static void gennvm_lun_info_print(struct nvm_dev *dev)
>   {
>   	struct gen_nvm *gn = dev->mp;
>   	struct gen_lun *lun;
>   	unsigned int i;
>
> -	gennvm_for_each_lun(gn, lun, i)
> -		pr_info("%s: lun%8u\t%u\n",
> -					dev->name, i, lun->vlun.nr_free_blocks);
> +
> +	gennvm_for_each_lun(gn, lun, i) {
> +		spin_lock(&lun->vlun.lock);
> +
> +		pr_info("%s: lun%8u\t%u\t%u\t%u\n",
> +				dev->name, i,
> +				lun->vlun.nr_free_blocks,
> +				lun->vlun.nr_inuse_blocks,
> +				lun->vlun.nr_bad_blocks);
> +
> +		spin_unlock(&lun->vlun.lock);
> +	}
>   }
>
>   static struct nvmm_type gennvm = {
> @@ -490,7 +499,7 @@ static struct nvmm_type gennvm = {
>   	.erase_blk	= gennvm_erase_blk,
>
>   	.get_lun	= gennvm_get_lun,
> -	.free_blocks_print = gennvm_free_blocks_print,
> +	.lun_info_print = gennvm_lun_info_print,
>   };
>
>   static int __init gennvm_module_init(void)
> diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
> index 76acd15..e527d67 100644
> --- a/include/linux/lightnvm.h
> +++ b/include/linux/lightnvm.h
> @@ -380,7 +380,7 @@ typedef int (nvmm_end_io_fn)(struct nvm_rq *, int);
>   typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *,
>   								unsigned long);
>   typedef struct nvm_lun *(nvmm_get_lun_fn)(struct nvm_dev *, int);
> -typedef void (nvmm_free_blocks_print_fn)(struct nvm_dev *);
> +typedef void (nvmm_lun_info_print_fn)(struct nvm_dev *);
>
>   struct nvmm_type {
>   	const char *name;
> @@ -404,7 +404,7 @@ struct nvmm_type {
>   	nvmm_get_lun_fn *get_lun;
>
>   	/* Statistics */
> -	nvmm_free_blocks_print_fn *free_blocks_print;
> +	nvmm_lun_info_print_fn *lun_info_print;
>   	struct list_head list;
>   };
>
>

Thanks, applied.
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