[dpdk-dev] [PATCH v1 12/13] ethdev: process declarative eth devargs

[Andrew Rybchenko]

On 08/30/2018 04:42 PM, Gaetan Rivet wrote:
> Process the class-specific arguments in a devargs.
> This processing takes the form of setting the proper eth_dev fields when
> relevant.
>
> Signed-off-by: Gaetan Rivet <gaetan.rivet at 6wind.com>
> ---
>   lib/librte_ethdev/eth_private.h   |  5 +++
>   lib/librte_ethdev/rte_class_eth.c | 62 +++++++++++++++++++++++++++++++
>   lib/librte_ethdev/rte_ethdev.c    |  7 ++++
>   3 files changed, 74 insertions(+)
>
> diff --git a/lib/librte_ethdev/eth_private.h b/lib/librte_ethdev/eth_private.h
> index 0f5c6d5c4..c0c065165 100644
> --- a/lib/librte_ethdev/eth_private.h
> +++ b/lib/librte_ethdev/eth_private.h
> @@ -19,6 +19,11 @@ struct rte_eth_dev *
>   eth_find_device(const struct rte_eth_dev *_start, rte_eth_cmp_t cmp,
>   		const void *data);
>   
> +/* Generic rte_eth_dev parameters processor. */
> +int
> +rte_eth_dev_args_parse(struct rte_eth_dev *eth_dev,
> +		       struct rte_devargs *da);
> +
>   #ifdef __cplusplus
>   }
>   #endif
> diff --git a/lib/librte_ethdev/rte_class_eth.c b/lib/librte_ethdev/rte_class_eth.c
> index d8d8e8845..18fdef605 100644
> --- a/lib/librte_ethdev/rte_class_eth.c
> +++ b/lib/librte_ethdev/rte_class_eth.c

<...>

> @@ -79,6 +93,54 @@ eth_dev_iterate(const void *start,
>   	return edev;
>   }
>   
> +static int
> +eth_dev_set_name(struct rte_eth_dev *edev,
> +		 const char *value)
> +{
> +	snprintf(edev->data->name,
> +		 sizeof(edev->data->name),
> +		 "%s", value);

strlcpy()?
Shouldn't we return error if name does fit in name buffer?

> +	return 0;
> +}
> +
> +static int
> +ethdev_args_process(const char *key,
> +		    const char *value,
> +		    void *_edev)
> +{
> +	static eth_dev_set_t eth_dev_set[] = {
> +		[RTE_ETH_PARAMS_NAME] = eth_dev_set_name,
> +		[RTE_ETH_PARAMS_MAX] = NULL,
> +	};
> +	struct rte_eth_dev *edev = _edev;
> +	int param;
> +
> +	param = ethdev_param_id(key);
> +	if (eth_dev_set[param])
> +		return eth_dev_set[param](edev, value);
> +	return 0;
> +}
> +
> +int
> +rte_eth_dev_args_parse(struct rte_eth_dev *edev,
> +		       struct rte_devargs *devargs)
> +{
> +	struct rte_kvargs *kvargs = NULL;
> +
> +	if (devargs == NULL || devargs->cls_str == NULL)
> +		return 0;
> +
> +	kvargs = rte_kvargs_parse_delim(devargs->cls_str, eth_params_keys, "/");
> +	if (kvargs == NULL) {
> +		RTE_LOG(ERR, EAL, "cannot parse argument list\n");
> +		return -EINVAL;
> +	}
> +	if (rte_kvargs_process(kvargs, NULL, ethdev_args_process, edev))

Shouldn't we free kvargs here as well?

> +		return -1;
> +	rte_kvargs_free(kvargs);
> +	return 0;
> +}
> +
>   struct rte_class rte_class_eth = {
>   	.dev_iterate = eth_dev_iterate,
>   };

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