Re: [dpdk-dev] [PATCH] kni: fix build on Centos 7.4 when Ethtool enabled

[Ferruh Yigit <ferruh.yigit@intel.com>]

On 5/22/2018 1:18 AM, Dan Gora wrote:
> Fix compilation errors on Centos 7.4 when CONFIG_RTE_KNI_KMOD_ETHTOOL
> is set to 'y'.
> 
> Centos 7.4 needs HAVE_NDO_BRIDGE_GETLINK_FILTER_MASK_VLAN_FILL:
> 
> igb_main.c: In function ‘igb_ndo_bridge_getlink’:
> igb_main.c:2289:2: error: too few arguments to function
>                    ‘ndo_dflt_bridge_getlink’
>   return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0, nlflags);
>   ^
> 
> Centos 7.4 needs HAVE_VF_VLAN_PROTO and needs to redefine
> ndo_set_vf_vlan to .extended.ndo_set_vf_vlan:
> 
> igb_main.c:2318:2: error: unknown field ‘ndo_set_vf_vlan’ specified
>                    in initializer
>   .ndo_set_vf_vlan = igb_ndo_set_vf_vlan,
>   ^
> 
> Signed-off-by: Dan Gora <dg@adax.com>

<...>

> @@ -3920,6 +3921,11 @@ skb_set_hash(struct sk_buff *skb, __u32 hash, __always_unused int type)
>  #if ((LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0)) || \
>      (SLE_VERSION_CODE && SLE_VERSION_CODE >= SLE_VERSION(12, 3, 0)))
>  #define HAVE_VF_VLAN_PROTO
> +#elif ( RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(7,4) )
> +/* In RHEL/Centos 7.4, the "new" version of ndo_set_vf_vlan
> + * is in the net_device_ops_extended struct */
> +#define HAVE_VF_VLAN_PROTO
> +#define ndo_set_vf_vlan extended.ndo_set_vf_vlan

This works but it is not really an "else" condition logically, what do you think
about something like:

 #if ((LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0)) || \
     (SLE_VERSION_CODE && SLE_VERSION_CODE >= SLE_VERSION(12, 3, 0)) || \
     ( RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(7,4) ))
 #define HAVE_VF_VLAN_PROTO
 #if ( RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(7,4) )
 /* In RHEL/Centos 7.4, the "new" version of ndo_set_vf_vlan
  * is in the net_device_ops_extended struct */
 #define ndo_set_vf_vlan extended.ndo_set_vf_vlan
 #endif /*  RHEL >= 7.4 */
 #endif /* >= 4.9.0, >= SLES12SP3 */

>  #endif /* >= 4.9.0, >= SLES12SP3 */
>  
>  #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
>