netdev - Re: [PATCH net-next v5 02/10] devlink: Adding SR-IOV enablement perm config param

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Date:   Mon, 30 Oct 2017 18:20:49 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     Steve Lin <steven.lin1@...adcom.com>
Cc:     netdev@...r.kernel.org, jiri@...lanox.com, davem@...emloft.net,
        michael.chan@...adcom.com, linville@...driver.com,
        gospo@...adcom.com, yuvalm@...lanox.com
Subject: Re: [PATCH net-next v5 02/10] devlink: Adding SR-IOV enablement perm
 config param

Mon, Oct 30, 2017 at 03:46:08PM CET, steven.lin1@...adcom.com wrote:
>Adding DEVLINK_PERM_CONFIG_SRIOV_ENABLED permanent config
>parameter; this parameter controls whether the device
>advertises the SR-IOV PCI capability. Value is permanent, so
>becomes the new default value for this device.
>
>  DEVLINK_PERM_CONFIG_DISABLE = Disable SR-IOV
>  DEVLINK_PERM_CONFIG_ENABLE  = Enable SR-IOV
>
>Signed-off-by: Steve Lin <steven.lin1@...adcom.com>
>Acked-by: Andy Gospodarek <gospo@...adcom.com>
>---
> include/uapi/linux/devlink.h | 18 +++++++++++++++++-
> net/core/devlink.c           |  1 +
> 2 files changed, 18 insertions(+), 1 deletion(-)
>
>diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
>index 55e35f2..1c5d4ae 100644
>--- a/include/uapi/linux/devlink.h
>+++ b/include/uapi/linux/devlink.h
>@@ -256,8 +256,24 @@ enum devlink_dpipe_header_id {
> 	DEVLINK_DPIPE_HEADER_IPV6,
> };
> 
>-/* Permanent config parameters */
>+/* Permanent config parameter enable/disable
>+ * DEVLINK_PERM_CONFIG_DISABLE = disable a permanent config parameter
>+ * DEVLINK_PERM_CONFIG_ENBALE  = enable a permanent config parameter
>+ */
>+enum devlink_perm_config_enabled {
>+	DEVLINK_PERM_CONFIG_DISABLE,
>+	DEVLINK_PERM_CONFIG_ENABLE,
>+};


Basically, this is "bool"

Why don't you use some own enum instead of NLA_U*. Like team does for
example:

enum team_option_type {
        TEAM_OPTION_TYPE_U32,
        TEAM_OPTION_TYPE_STRING,
        TEAM_OPTION_TYPE_BINARY,
        TEAM_OPTION_TYPE_BOOL,
        TEAM_OPTION_TYPE_S32,
};



>+
>+/* Permanent config parameters:
>+ * DEVLINK_PERM_CONFIG_SRIOV_ENABLED: Configures whether SR-IOV PCI capability
>+ * is advertised by the device.
>+ *   DEVLINK_PERM_CONFIG_DISABLE = disable SR-IOV
>+ *   DEVLINK_PERM_CONFIG_ENABLE  = enable SR-IOV
>+ */
> enum devlink_perm_config_param {
>+	DEVLINK_PERM_CONFIG_SRIOV_ENABLED,


Please align "ENABLED" vs "ENABLE".
The rest of devlink code uses "ENABLED"


>+
> 	__DEVLINK_PERM_CONFIG_MAX,
> 	DEVLINK_PERM_CONFIG_MAX = __DEVLINK_PERM_CONFIG_MAX - 1
> };
>diff --git a/net/core/devlink.c b/net/core/devlink.c
>index 5e77408..b4d43c29 100644
>--- a/net/core/devlink.c
>+++ b/net/core/devlink.c
>@@ -1569,6 +1569,7 @@ static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
> static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1];
> 
> static const u8 devlink_perm_cfg_param_types[DEVLINK_PERM_CONFIG_MAX + 1] = {
>+	[DEVLINK_PERM_CONFIG_SRIOV_ENABLED] = NLA_U8,
> };
> 
> static int devlink_nl_single_param_get(struct sk_buff *msg,
>-- 
>2.7.4
>