netdev - Re: [patch net-next v2 7/7] netdevsim: implement fake flash updating with notifications

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Date:   Tue, 28 May 2019 13:01:15 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, mlxsw@...lanox.com,
        sthemmin@...rosoft.com, dsahern@...il.com, saeedm@...lanox.com,
        leon@...nel.org, f.fainelli@...il.com
Subject: Re: [patch net-next v2 7/7] netdevsim: implement fake flash
 updating with notifications

On Tue, 28 May 2019 13:48:46 +0200, Jiri Pirko wrote:
> From: Jiri Pirko <jiri@...lanox.com>
> 
> Signed-off-by: Jiri Pirko <jiri@...lanox.com>
> ---
> v1->v2:
> - added debugfs toggle to enable/disable flash status notifications

Could you please add a selftest making use of netdevsim code?

Sorry, I must have liked the feature so much first time I missed this :)

> diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
> index b509b941d5ca..c5c417a3c0ce 100644
> --- a/drivers/net/netdevsim/dev.c
> +++ b/drivers/net/netdevsim/dev.c
> @@ -38,6 +38,8 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
>  	nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
>  	if (IS_ERR_OR_NULL(nsim_dev->ports_ddir))
>  		return PTR_ERR_OR_ZERO(nsim_dev->ports_ddir) ?: -EINVAL;
> +	debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
> +			    &nsim_dev->fw_update_status);
>  	return 0;
>  }
>  
> @@ -220,8 +222,49 @@ static int nsim_dev_reload(struct devlink *devlink,
>  	return 0;
>  }
>  
> +#define NSIM_DEV_FLASH_SIZE 500000
> +#define NSIM_DEV_FLASH_CHUNK_SIZE 1000
> +#define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
> +
> +static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name,
> +				 const char *component,
> +				 struct netlink_ext_ack *extack)
> +{
> +	struct nsim_dev *nsim_dev = devlink_priv(devlink);
> +	int i;
> +
> +	if (nsim_dev->fw_update_status) {
> +		devlink_flash_update_begin_notify(devlink);
> +		devlink_flash_update_status_notify(devlink,
> +						   "Preparing to flash",
> +						   component, 0, 0);
> +	}
> +
> +	for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
> +		if (nsim_dev->fw_update_status)
> +			devlink_flash_update_status_notify(devlink, "Flashing",
> +							   component,
> +							   i * NSIM_DEV_FLASH_CHUNK_SIZE,
> +							   NSIM_DEV_FLASH_SIZE);
> +		msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);

In automated testing it may be a little annoying if this takes > 5sec

> +	}
> +
> +	if (nsim_dev->fw_update_status) {
> +		devlink_flash_update_status_notify(devlink, "Flashing",
> +						   component,
> +						   NSIM_DEV_FLASH_SIZE,
> +						   NSIM_DEV_FLASH_SIZE);
> +		devlink_flash_update_status_notify(devlink, "Flashing done",
> +						   component, 0, 0);
> +		devlink_flash_update_end_notify(devlink);
> +	}
> +
> +	return 0;
> +}
> +
>  static const struct devlink_ops nsim_dev_devlink_ops = {
>  	.reload = nsim_dev_reload,
> +	.flash_update = nsim_dev_flash_update,
>  };
>  
>  static struct nsim_dev *