[dpdk-dev] [PATCH 00/10] kni: Interface detach and link status fixes.

[Ferruh Yigit]

On 6/29/2018 2:54 AM, Dan Gora wrote:
> Hi All,
> 
> The following patches are to fix a problem with detaching a KNI
> interface using rte_kni_release and to add a new API function
> to allow users to change the link status (up/down, speed, etc)
> of the interface in the linux kernel.  In previous versions, it
> was impossible to release a KNI interface without waiting for the
> timeout in kni_net_process_request to expire if the interface is in
> the UP state.  The solution to this issue was to separate the process
> of releasing the netdev device from the linux kernel from actually
> freeing the KNI interface in the kernel and in the RTE library by
> introducing a new API function, rte_kni_free().
> 
> The last patch : 'kni: add API to set link status on kernel interface'
> adds a new API function to allow the DPDK user to change the link
> speed and status reported by the netdev in the linux kernel.
> 
> This resolves issues with allowing automatic network configuration
> applciations such as NetworkManager to assign addresses and for user
> space applications to be able to open sockets on these interfaces,
> as some operations rely on the link status being up before they
> work properly.
> 
> This last patch is included in this series because both new "features"
> introduce new ioctls to the rte_kni kernel module, so the order in
> which the patches get applied affects which number each new ioctl gets.
> I thought it better to bundle them together to try to get them applied
> as a series to avoid any issues with this.
> 
> *v2*
> 
> The first time I submitted these patches, they failed with
> compilation errors in Patchwork, but they are failing due to
> rte_kni_free being a missing symbol, which is only introduced here in
> patch 4/10.  I'm not really sure how the automatically compilation
> tool works in patchwork.  Does it apply all of the patches in the
> series before compilation?  Does it compile after each patch?
> 
> I tried my best to break up these patches into small enough pieces
> so that they could be reviewed fairly easily, but I'm not sure that
> I did a good job.  If there are suggestions on how the changes could
> be organized or split better, please let me know.
> 
> thanks
> dan
> 
> v2:
>   Re-submitted as a threaded series as per thomas at monjalon.net suggestions.
>   cc'd Ferruh on cover letter.
>   No code changes.
> 
> Dan Gora (10):
>   kni: remove unused variables from struct kni_dev
>   kni: separate releasing netdev from freeing KNI interface
>   kni: don't touch struct kni_dev after freeing
>   kni: add rte_kni_free to KNI library
>   kni: don't run rte_kni_handle_request after interface release
>   kni: increase length of timeout for KNI responses
>   kni: update kni test for rte_kni_free
>   kni: add rte_kni_free to KNI example app
>   kni: add rte_kni_free to KNI vdev driver
>   kni: add API to set link status on kernel interface

Hi Dan,

Thank you for the patches, but they were later for this release proposal
deadline and will be considered/reviewed for next release.

Thanks,
ferruh